%EPT
An index that measures the abundance of three macroinvertebrategroups, Ephemeroptera, Plecoptera, and Trichoptera. These groups are particularly sensitive to water pollution.
Acidification
The process of a substance becoming more acid (below pH7).
Aesthetic/amenity values
The natural or physical features of an area or thing that contribute to people’s appreciation of it, such as its visual appeal. Aesthetic quality of freshwater refers to whether the water’s appearance is appealing to a drinker or user of it (that is, whether it looks clear and clean).
Afforestation
The process of establishing a forest on land that is not a forest, or has not been a forest for a long time, by planting trees or their seeds for commercial use or any other purpose.
Aggregate (of soil)
Mixture of fine soil particles held together in a single mass.
Aggregate stability
The stability of soil aggregates or particles.
Agrichemical
A synthetic substance used in agricultural and horticultural activity to eradicate, modify, or control selected plants and animals.
Algae
Small, often microscopic plants. Freshwater algae grow in the water or on rocks on river and lake beds and shores. Large quantities of algae can cause algal blooms.
Algal bloom
A rapid increase in the population of algae in an aquatic system. Blooms can reduce the amount of light and oxygen available to other aquatic life and may be toxic if ingested by humans (or an irritant to skin and eyes).
Allocation
The maximum volume of water that may be taken from freshwater sources by resource consent holders. See also consumptive water use.
Ambient air quality
The quality of the air in the surrounding outdoor environment.
Ammoniacal nitrogen
Covers two forms of nitrogen: ammonia and ammonium. Animal waste (particularly from humans and farmed animals such as sheep and cows) is the major source in New Zealand waterways.
Aquaculture
The commercial farming of fish, shellfish, or aquatic plants.
Aquifer
An underground rock formation that stores water, most commonly one that stores sufficient quantities of water for people to use. See also confined and unconfined aquifer.
Arable cropping
Cultivation activities on arable soil.
Arable soil
Soil that is suitable for cropping.
Ascidian
A group of marine animals, which includes sea squirts. These soft, boneless filter feeders are found all over the world.
Assessed fish species/stocks
Fish species for which there is enough information to quantitatively measure the status of the stock.
Atmospheric deposition
The process by which particles suspended in the air are transported and deposited on a distant land or water surface.
Bacteria
Micro-organisms, some of which are harmful to humans.
Beneficial reuse
The reuse of a material or substance that would otherwise be disposed of to a landfill or cleanfill.
Benthic
Found in or on the bottom sediments of a stream, river, lake, or ocean.
Biocapacity
The supply of resources from a given area of biologically productive land or sea (contrasted with the ecological footprint, which is a measure of the demand on those resources). Biocapacity can be varied by physical conditions and by human actions, including changing ecosystem management and agricultural practices, technology improvements (such as fertiliser use and irrigation), ecosystem degradation, and weather.
Biochemical oxygen demand (BOD5)
A measure of the amount of organic pollution in water.
Biodiesel
A fuel that can be produced from vegetable oil or animal fat and used as a substitute or partial substitute for diesel.
Biodiversity
Variation of life at all levels of biological organisation on earth, including diversity of genes, species, and ecosystems.
Biofuel
Fuel that is derived from biomass (recently living organisms such as wood) or their metabolic by-products (such as tallow from cows). Biofuels are a renewable energy source.
Biogas
Energy produced from the anaerobic digestion of sewage and industrial waste, including landfill gas and sewage.
Biogeographic region
An area that is defined according to patterns of ecological and physical characteristics in the seascape.
Biomass
Total weight of the organisms of a population inhabiting a given area.
Biophysical
The biological and physical features of the environment.
Biosecurity
Measures taken to protect a nation’s food supply, agricultural resources, and natural environment from introduced pest species and other unwanted organisms.
Biosolids
A by-product of sewage collection and treatment processes that is treated and/or stabilised so it can be beneficially reused. Also known as sewage sludge.
Bivalve
Marine animal with paired shells that protect the soft animal inside. Bivalves include mussels, scallops, cockles, oysters, and clams.
Bovine tuberculosis (TB)
Tuberculosis in cattle, caused by the aerobic bacterium Mycobacterium bovis, which can jump species to cause the disease in humans.
Breach
Where the concentration of a pollutant fails to meet what a national environmental standard permits.
Browsing animals
Herbivorous animals that generally feed on high-growing plants rather than grasses.
Brush-weed
Usually a shrub or small tree such as gorse that is undesirable for livestock consumption or timber production.
Bryozoan mat
A colony of bryozoans, certain species of very small aquatic invertebrate animals.
Bycatch
Fish, birds, and marine mammals that fishers catch unintentionally.
Canopy
A layer of vegetation in a forest, often formed by trees.
Carbon footprint
A measure of the effects of human activities on the climate in terms of the total amount of greenhouse gases they produce (measured in units of carbon dioxide).
Carbon monoxide
A colourless and odourless gas produced by incomplete burning of carbon-containing fuels such as wood, coal, petrol, and diesel.
Carbon sink
An area where the rate of carbon uptake by living organisms exceeds the rate of carbon released from other parts of the carbon cycle. The main carbon sinks are the world’s oceans and forests. See also forest sink.
Carcass weight
The weight of an animal after skinning and gutting, when it is ready for consumption.
Carrying capacity
The maximum population that a particular area of land or sea is able to support indefinitely.
Catchment
An area of land from which water from rainfall drains toward a common watercourse, stream, river, lake, or estuary.
Cells (in relation to trawling)
The 25 km2 divisions of New Zealand’s Exclusive Economic Zone (EEZ) used to report accurately on trawl effort.
Chain-linked series
A data series that has been chain-linked – a method of linking individual data figures together using a regularly re-weighted system, to produce a long-term time series.
Chlorofluorocarbons (CFCs)
Halocarbon chemical carbons that contain only chlorine, fluorine, and carbon atoms. CFCs are both ozone-depleting substances and greenhouse gases.
Cleanfill
A waste disposal site that accepts only inert wastes such as clay, soil, rock, concrete, and bricks which, when buried, will have no adverse effect on people or the environment.
Climate change
Statistically significant long-term changes in climatic conditions on a regional or global scale. The term refers to changes in the natural pattern of climatic variability over time periods ranging from decades to millions of years.
Coastal and marine habitat and ecosystem classification
A combination of the Coastal Biogeographic Regions and Marine Environment Classification systems, used to report on the state of New Zealand’s marine environment.
Coastal Biogeographic Regions Classification
A classification dividing New Zealand into 13 coastal biogeographic regions based on large variations in physical and biological characteristics. It is used for the coastal marine environment (that is, waters less than 200 metres deep).
Coastal margin
The transition area between ocean and land, such as shallow coastal waters, beaches, dunelands, lowland rivers, estuaries, saltmarsh, and adjacent land areas.
Coastal waters
Seawater extending from the coast to 12 nautical miles offshore. Coastal waters also include seawater in estuaries, fiords, inlets, harbours, and bays.
Cogeneration
The simultaneous or sequential production of two or more forms of useful energy from a single primary energy source – for example, electricity and thermal energy such as heat or steam for industrial or commercial heating or cooling.
Commercial waste
Waste generated by the activities of a commercial business or industry.
Community
A group of organisms sharing an environment.
Community recycling facilities
Recycling services provided by local authorities for a community, including kerbside collections and drop-off facilities.
Compaction
The destruction of soil structure by heavy vehicles (such as tractors) or by livestock.
Concentration
The measure of how much of a given substance there is mixed with another substance. Usually related to fluids, it is the amount of material in a solution in relationship to the amount of solvent, expressed as the ratio.
Confined aquifer
An aquifer that is ‘closed’ to the land surface; that is, it has a low-permeability upper layer such as clay or silt that prevents it from being directly replenished by rainfall. See also unconfined aquifer.
Conservation
Preserving, guarding, or protecting a resource, and/or keeping it safe or intact. The term also refers to the wise use of natural resources.
Constant price
See real.
Construction and demolition waste
Waste generated from building activities, including the preparation and/or clearance of a property or site. Materials such as clay, soil, and rock are excluded when they are associated with infrastructure such as road construction and maintenance, but building-related infrastructure is included.
Consumer energy
The amount of energy consumed by final users. It excludes energy used or lost in the process of transforming energy into other forms and in bringing the energy to the final consumers. For example, natural gas is a primary energy source, some of which is transformed into electricity of which some is lost in transmission to consumers.
Consumption
The acquisition and/or use of materials, goods, and services to provide utility. In an environmental context, the use of ecological resources in the production of goods and services and their final use by individuals or organisations. A consumed good or service embodies all the resources, including energy, that were needed to provide it to the consumer.
Consumptive water use
Water that is consumed or not returned directly to the source from which it was taken (for example, drinking water or irrigation supply). Non-consumptive uses do not result in significant losses of water (for example, the water used in hydro-electric power generation, which is returned downstream from where it is taken).
Contact recreation
Recreational activities that bring people physically in contact with water, involving a risk of involuntary ingestion or inhalation of water.
Contaminant
Any substance (including gases, odorous compounds, liquids, solids, and micro-organisms) or energy (excluding noise), or heat, that results in an undesirable change to the physical, chemical, or biological environment. Also called pollutant.
Contaminated land or site
Land or a site that has been exposed to a hazardous substance that has the potential to damage the environment.
Continental shelf
Underwater land that runs from the shore to where the sea floor drops away sharply to the deep ocean floor.
Cultivation
The agricultural preparation of soil for growing crops.
Cultural landscape
A landscape that has been modified by people and is associated with heritage or aesthetic/amenity values.
Customary authority
Customary rights, prestige, and authority over land. For the purposes of the Resource Management Act 1991, mana whenua means customary authority exercised by an iwi or a hapū in an identified area.
Customary fishing
Non-commercial fishing (that is, the fish caught may not be traded) within a customary use area managed by iwi and hapū. Guardians appointed by iwi, hapū, and the Minister of Fisheries can issue anyone a permit to fish in their customary use area.
Customary restrictions
Restrictions requested by tangata whenua, including rāhui, mātaitai, and taiāpure reserves.
DDT
Dichloro-diphenyl-trichloroethane, an insecticide that is also toxic to humans, it may no longer be legally used in New Zealand.
De-couple
The term for decreasing the dependency between variables. Often used in reference to economic production and environmental quality, to mean the ability of an economy to grow without corresponding increases in environmental pressure.
Deepwater
In technical terms, water that is 200 metres deep or deeper.
Deforestation
The removal of forest from a landscape.
Demersal
Living on or near the bottom of a body of water.
Demersal Fish Community Classification
The geographic distribution, composition, and environmental conditions of particular demersal fish communities. This classification was developed using an extensive set of research data about trawling.
Demography
The combined characteristics of a population, such as average age, sex ratio, marital status, family size, education, occupation, and geographic location.
Design for the environment
Products that are designed and managed to cause minimal environmental impact through their manufacture, use, recovery, and disposal. See also greener design.
Didymo or ‘rocksnot’ (Didymosphenia geminata)
A species of single-celled algae that grow in warm and shallow fresh water. It can form large mats on the bottom of lakes, rivers, and streams, affecting stream habitats and fish food sources, and making recreational activities unpleasant.
Diesel boiler
A boiler fuelled by diesel oil.
Diesel oxidation catalyst
A device that breaks down pollutants in the exhaust stream of diesel vehicles into less harmful components.
Dioxins
The by-products of various industrial processes (such as bleaching paper pulp, and chemical and pesticide manufacture) and combustion activities (such as burning rubbish, forest fires, and waste incineration).
Dissolved oxygen
The oxygen content of water.
Dissolved reactive phosphorus
The soluble form of the nutrient phosphorus, which is readily available for use by plants.
Distribution
In biology, the geographical area within which a species can be found. Also referred to as range.
Diversion
In reference to waste, diverting from landfill or cleanfill to other destinations, typically for reuse, recycling, or to recover materials.
Dobson unit
A measure of atmospheric ozone, specifically ozone in the stratospheric ozone layer. One Dobson unit refers to a layer of ozone that is 10 µm thick under standard temperature and pressure.
Domestic recycling
Materials recycled by householders through kerbside collection or at drop-off facilities.
Domestic transport
Road, off-road, and rail land transport, coastal shipping, and national air transport. International transport is excluded.
Doorspread
The distance between the two trawl doors of a fishing trawler – effectively, the width of a single trawl sweep.
DPSIR model
Driving force-Pressure-State-Impact-Response model, which shows how human activity (also known as a driver or driving force) exerts pressure on the environment and, as a result, changes the state of the environment. It includes human responses to these changes to alter the driving force in some way. (See chapter 1, ‘Environmental reporting’.)
Dredge/dredging
A means of harvesting bivalve molluscs such as oysters, clams, and scallops from the seabed. The fishing vessel tows a metal-framed basket (dredge), raking the catch from the sea floor into the basket.
Drop-off facilities
Specific sites provided for local communities to drop off materials for recycling.
Dry bulk density
Natural density, the weight of dry soil per unit of volume, usually expressed in g/cm3.
Drystock pasture
Sheep, beef, deer, and other farming activities that occur on pasture.
E. coli (Escherichia coli)
Bacteria that indicate the presence of faecal matter, and therefore risk of disease, in freshwater. See also recreational water quality.
Earth flow erosion
A slow-flowing mass of fine-grained soil particles saturated with water.
Ecological balance of trade
The difference between the ecological footprints of exported and imported goods and services.
Ecological diversity
The variety of ecosystems in a particular geographic area, and the communities within them and actions between them.
Ecological footprint
A measure of how much biologically productive land and sea area is needed by an individual, population, or activity to compensate for all the resources consumed and to absorb the carbon dioxide emissions it generates as waste. This is calculated using prevailing technology and resource management practices, and is usually measured in global hectares. Because trade is global, an individual’s or a country’s footprint includes contributions that have been imported from all over the world.
Ecosystem
All plants, animals, and micro-organisms in a particular area, interacting with all of that environment’s non-living physical factors. Ecosystems may be small and short-lived (for example, water-filled tree holes or logs rotting on a forest floor), or large and long-lived (such as forests or lakes).
Ecotoxic
An element that is toxic to the environment, or to a particular ecosystem; and, for substances, capable of harming the environment.
Ecotoxicity
Harmful to ecosystems or to the wider environment.
Effluent
Liquid waste that enters the environment from a farm, factory, commercial establishment, or household. It can refer to livestock’s urine or manure, but generally refers to wastewater from a sewage treatment plant.
Electricity generation
The process of producing electricity by transforming other forms of energy.
Electronic waste
Any electrical or electronic appliance that is unwanted and/or unvalued, and discarded or discharged.
El Niño
During an El Niño phase of ENSO, New Zealand tends to experience stronger or more frequent winds from the west in summer, typically leading to drought in east coast areas and more rain in the west.
Emission
A pollutant that is released into the atmosphere; its concentration will depend on how the pollutant disperses in the atmosphere.
Emissions inventory
An estimate of the quantity of pollutants being released into the atmosphere.
Endangered species
A species that is at risk of becoming extinct because it is either few in number or threatened by changes in the environment.
Endemic
In biology and ecology, something that is found only in its own place or region, and does not naturally occur anywhere else. The place must be a discrete geographical unit – often an island or island group, but sometimes a country, habitat type, or other defined area or zone. (The term ‘endemic’ may sometimes be applied to species that breed only within a specified locality/region and are unique to that area, such as species that breed only in New Zealand, but disperse to other countries at certain stages of their life cycle.)
Endemism
The occurrence of plant or animal species (termed endemic) which are naturally found only in a specified area or locality.
Energy
Power derived from physical or chemical resources to produce light, heat, or movement.
Energy efficiency
The ratio of total useful output to energy input.
Energy transformation
The process of transforming energy from its initial state (primary energy) into a more convenient, useable state (consumer energy).
Engineered liners
Used to minimise leachate from entering and contaminating surface and groundwater systems.
ENSO
El Niño Southern Oscillation is synonymous with the El Niño/La Niña cyclical weather patterns. An interaction between the tropical Pacific Ocean and the global atmosphere that results in irregular (two to seven years) oscillations in ocean and atmospheric conditions, often with significant impacts, such as altered marine habitats, rainfall changes, floods, droughts, and changes in storm patterns. See also El Niño and La Niña.
Enterococci
Bacteria that occur naturally in the gut of humans and animals, including mammals, birds, fish, and reptiles, which are useful indicators of the extent of faecal contamination of recreational waters.
Environmental indicator
A physical, chemical, or biological variable (or set of variables), generally quantitative, that may be used to describe complex environmental information, including trends and progress over time.
Environmental reporting
Providing information on the environmental status of an area, or a particular environmental aspect, such as air, waste, or water.
Erosion
The wearing away of land by the actions of water, wind, or ice.
Estuary
A semi-enclosed coastal body of water with an open connection to the sea and within which sea water mixes with freshwater from land run-off, usually a river.
Exceedence
Where the concentration of a pollutant exceeds a national environmental standard or a guideline.
Exclusive Economic Zone (EEZ)
The area of sea and seabed beyond coastal waters, from 12 to 200 nautical miles offshore.
Exotic
Introduced from another country.
Exotic conifers
Introduced cone-bearing trees.
Exposure
Contact with a chemical, physical, or biological agent that can have either a harmful or beneficial effect.
Extended continental shelf (ECS)
An extension of the continental shelf that includes some of the deep ocean floor. The extent of New Zealand’s ECS is currently being considered by the United Nations Commission on the Limits of the Continental Shelf.
Extinction
In biology and ecology, the demise of a species that results in biodiversity being reduced. The moment of extinction is generally considered to be marked by the death of the last individual of that species.
Faecal matter
Particles of animal dung or human faeces, which carry bacteria that can be harmful if ingested. See also sewage and E. coli.
Farm plastics
Chemical containers and silage wrap used on farms; these are dangerous to burn or bury on the farm, and if not properly managed can be hazardous if disposed of to landfills.
Fauna
All animal species present, especially in a particular country, region, or time.
Fibrous mat
A mat made up of plant root fibres.
Fish stock
Any fish, seaweed, or other aquatic life of one or more species that are treated as a unit for the purposes of fisheries management.
Fisheries
A general term that covers the fishers, vessels, and fishing gear involved in catching fish from a particular fish stock. It also refers to the fishing grounds and catch.
Fishing year
From 1 October to 30 September of the following year.
Floodplain
A plain that borders a river and is subject to flooding.
Flora
All plant species present, especially in a particular country, region, or time.
Food chain
The feeding relationships (also called food webs and food networks) between species in an ecological community. It graphically represents the transfer of material and energy from one species to another within an ecosystem.
Forest sink
The ability of a forest to remove a greenhouse gas from the atmosphere. In New Zealand, forests are the primary carbon sink.
Fossil fuel
Coal, natural gas, liquefied petroleum gas (LPG), crude oil or a fuel derived from crude oil (including petrol and diesel), so called because they have been formed from ancient organic matter over long periods of time.
Fuel combustion
The controlled burning of solid, liquid, or gaseous fossil fuels to generate heat or energy.
Fugitive emission
An emission that escapes during the production and processing, transport, storage, transmission, and distribution of fossil fuels such as coal, oil, and natural gas.
Gaseous exchange
The exchange of oxygen (O2) and carbon dioxide (CO2) that occurs in the respiratory system.
Gastropod
A soft-bodied animal, which is often protected by a shell. Marine gastropods include sea snails, sea hares, limpets, abalones, turbans, and tritons.
Gazetted
Published in the New Zealand Gazette as an official record, which may appear before a change (such as the creation of a national park) takes effect legally.
Gazetted airshed
An area, formally notified in the New Zealand Gazette, that is likely or known to have unacceptable levels of pollutants, or may require air quality management.
Genetic diversity
The genetic variety found among individuals of a single species.
Geographically spatial (geospatial) data or information
Data and information that can be related to a specific location or set of points on land, in water, in air, or in the atmosphere, and represented on a map. Geospatial data is used in a geographic information system (GIS), which is a software programme for analysing data and creating maps.
Geology
The study of the earth’s outer layer, including the minerals and rocks it is made of, and the physical forces that affect its development and appearance.
Geospatial
Spatial representation of geographic information.
Glacial action
The action of glaciers.
Global hectare (gha)
A local hectare that is adjusted to allow comparisons of ecological footprints with other countries, such as its ability to produce resources and absorb wastes in a given year against a world average. For example, a hectare of New Zealand grazing land is 2.5 times more productive than the global average. The use of global hectares recognises that different land types have different productivity – for instance, a hectare of highly productive land represents more global hectares than the same amount of less productive land.
Green waste
Waste produced by both commercial and domestic gardening activities, also known as garden waste.
Greener design
The design of products to be environmentally sustainable, which conform to environmentally sound principles of building, material, and energy use.
Greenhouse gas
Atmospheric gas such as water vapour, carbon dioxide, tropospheric ozone, nitrous oxide and methane, transparent to incoming solar radiation but opaque to reradiated long-wave radiation.
Gross domestic product (GDP)
The value of all goods and services produced in New Zealand during a specified time period.
Ground level ozone
A colourless and odourless gas that is a secondary pollutant. It differs from atmospheric ozone (see chapter 8, ‘Atmosphere’) as it occurs at ground level. Examples of pollutants that form ozone are oxides of nitrogen and volatile organic compounds caused by transport, home heating, and industrial processes.
Groundwater
Water that flows beneath the land surface through pores and fissures in rock and soil. Permeable underground zones where groundwater accumulates are known as aquifers. See also confined aquifer and unconfined aquifer.
Groundwater bore (well)
A pipe installed vertically in the ground through which groundwater is pumped to the surface.
Gully erosion
Erosion caused by run-off water accumulating in narrow channels and creating large gullies.
Habitat
The area where a particular species lives – essentially, the natural environment that surrounds, influences, and is used by a species population.
Halocarbon
A chemical compound containing carbon atoms and one or more atoms of the halogens chlorine, fluorine, bromine, or iodine. Used widely in fire extinguishers, as propellants, and in solvents. Halocarbons have negative environmental effects such as ozone depletion and are also greenhouse gases.
Halon
Chemical compounds containing bromine that have long lifetimes and, when broken down in the atmosphere, are known to cause depletion of ozone.
Hapū
A Māori sub-tribal group made up of whānau groups that share a common ancestor.
Hazardous
Having the capacity to adversely affect either health or the environment.
Hazardous activities and industries list (HAIL)
A compilation of activities and industries that are considered likely to contaminate land through their use, storage, or disposal of hazardous substances.
Hazardous substance
Includes but is not limited to any substance defined in section 2 of the Hazardous Substances and New Organisms Act 1996 as hazardous.
Hazardous waste
Materials that are flammable, explosive, oxidising, corrosive, toxic, ecotoxic, radioactive, or infectious. Examples include solvents and cleaning fluids, medical waste, unused agricultural chemicals, and many industrial wastes.
Herbaceous
A plant with soft rather than woody tissues.
Heritage protection authorities
An authority that can direct local councils to protect the special heritage qualities of a place or structure under the district plan.
High-producing exotic grassland
An area of introduced grass species used for production processes that create a high level of value or wealth.
Household
The European Environment Agency has referred to this term as including all the people who occupy a housing unit. According to Statistics New Zealand, a household includes any number of people usually residing together in a private dwelling, including members who are temporarily elsewhere, but not including visitors. Note that the national accounts data used in chapter 3, ‘Household consumption’, for household consumption expenditure, and the number of households in New Zealand, also includes non-private dwellings such as hospitals and boarding houses.
Household consumption expenditure
The amount of money spent by households on goods and services.
Hybrid vehicle
A vehicle with an internal combustion engine (using petrol or diesel) providing power to the wheels while also charging a battery. An electric motor then uses the stored energy in the battery to move the vehicle at low speeds and while accelerating. The dual or ‘hybrid’ drive train uses less fuel than a conventional vehicle.
Hydrographic area
A defined area of water and its associated marginal land or underlying sea floor, river bed, or lake bed.
Indigenous
Native, or belonging naturally to a given region or ecosystem, as opposed to exotic or introduced (can be used for people, animal, or plant species or even mineral resources).
Inert
Not affecting other substances when in contact with them, chemically inactive.
Inflation
An increase in the general or average level of prices of goods and services over a period of time.
Inshore area
The area extending from the shore out to deep waters.
Integrated catchment management
Decisions on the use of land, water, and other environmental resources based on the effect of that use on all those resources, and on all the people within a designated catchment boundary.
Intensification
In agriculture, an increase in the stocking rate of animals, or an increase in the level of production from a given area of land.
Inter-tidal
The area where land and sea meet, which is covered by seawater at high tide, and exposed at low tide.
Intrinsic value
Value that is not dependent on monetary value or usefulness, but a natural part of the item itself.
Introduced species
A species that is not native to a given place, but has been transported there as a result of human activity.
Invasive species
Non-indigenous species of plants or animals that adversely affect the habitats they invade economically, or environmentally, or in another way.
Invertebrate
An animal that has no backbone or spinal column. Opposite of vertebrate.
Irrigation
In horticulture and agriculture, water provided by a sprinkler system to promote plant growth.
IUCN red list
The International Union for the Conservation of Nature and Natural Resource (now the World Conservation Union) produces a Red List of Threatened Species with information about animal species groups, including their conservation status. Its main purpose is ‘to catalogue and highlight those groups that are facing a higher risk of global extinction’.
Iwi
A Māori tribal group.
Jurisdictional zone
A zone governed by a specific legal regime. Each of New Zealand’s three marine jurisdictional zones – territorial sea, Exclusive Economic Zone, and extended continental shelf – has its own different legal regime.
Kaitiaki
An iwi, hapū, or whānau group with responsibility for kaitiakitanga.
Kaitiakitanga
The guardianship of natural and physical resources by the iwi or hapū of an area, in keeping with tikanga Māori.
Kerbside facilities
Recycling services provided to local communities through the collection of recycled materials directly from households.
La Niña
A weather pattern that frequently affects New Zealand, typically bringing stronger winds and warmer than normal temperatures to much of the country. See also ENSO and El Niño.
Lambing percentage
The proportion of lambs born to the breeding stock (ewes).
Land cover
The physical material at the earth’s surface, including grass, asphalt, trees, bare ground, and water.
Land information memorandum (LIM)
An official document that gives information about land within a territorial authority’s district. LIM information will include any building consents or other authorisations applying to buildings on the land, and any special features it has, including potential erosion, subsidence or inundation, or the likely presence of hazardous contaminants.
Land-use control
Control of activities on the land through regulatory methods (such as resource consents) or non-regulatory methods (such as voluntary agreements between land owners and resource managers).
Land-use intensity
The extent to which, or intensity with which, land is used.
Landfill
An area for the controlled disposal of solid waste.
Landform
Any feature of the earth’s surface with a characteristic shape that has been produced by natural causes.
Landscape
The visible features of an area of land, including physical landforms, living flora and fauna, abstract elements such as light and weather conditions, and human effects.
Landslip
Ground movement, the downward movement of relatively dry masses of rocks and earth or a combination of the two.
Leaching
The process by which dissolved materials are filtered through soil by a liquid (usually water) and often end up in rivers, streams, lakes, and groundwater.
Light vehicle fleet
Private and commercial vehicles weighing less than 3.5 tonnes, which together account for 93 per cent of all licensed vehicles on New Zealand roads (excluding motorcycles).
Liquefied petroleum gas (LPG)
A colourless and odourless gas that burns readily in air and is used for heating, cooking, and transport.
Liquid waste
Waste that is generated in, or converted to, a liquid form for disposal. It includes point source and non-point source discharges such as stormwater and wastewater. See also point-source pollution and non-point source pollution.
Livestock
Domesticated animals, which may be kept or raised in pens, houses, on pastures, or on farms as part of an agricultural or farming operation, for commercial or private use.
Local hectare (lha)
The basic building block of an ecological footprint. A local hectare (also referred to as actual land area) shows the biological productivity (or biocapacity) of one real hectare within a specified region or country, in one year. The value of local hectare is limited because it assumes all land to be equally valuable or biologically productive.
Lower-waste goods
Products that result in less waste, both in terms of their packaging and their disposal at the end of their useful life.
Low-producing exotic grassland
An area of introduced grass species used for production processes that create a low level of value or wealth.
Macroalgae
Large algae, including seaweeds, which are visible to the naked eye.
Macroinvertebrate (freshwater)
Aquatic invertebrate animals such as insects, worms, and snails which are visible to the naked eye. Populations of macroinvertebrates are sampled to provide an indication of stream water quality. See also %EPT.
Macropore
A pore greater than 0.05 millimetres within soil that is usually air-filled and contains water only when the soil is saturated or draining.
Mana whenua
Customary authority exercised by an iwi or hapū in a particular area.
Managed site
A site containing hazardous substances that is managed so it no longer meets the definition of ‘contaminated land’ contained in the Resource Management Act 1991.
Management areas
Defined areas within New Zealand’s Exclusive Economic Zone that have a specific management system or rules. These rules apply to recreational fishers and may vary across management areas.
Marine Environment Classification (MEC)
A combination of physical factors used to classify and map deepwater (at least 200 metres deep) marine areas of similar ecological character.
Marine protected area (MPA)
A geographically defined area that is protected primarily for conservation purposes and to maintain biodiversity values. It includes marine reserves and mātaitai.
Marine reserve
Specified areas of the sea or inter-tidal areas that are protected under the Marine Reserves Act 1971, and managed to preserve their natural state as the habitat for marine life. All marine life within them is protected.
Marine sanctuary
A defined marine area where certain activities are prohibited to prevent particular species from being harmed.
Mass land movement
The bulk movement (erosion) of soil.
Mass movement soil erosion
Extreme landslip, tunnel gully, gully, and earth-flow forms of soil erosion in which bulk soil slips away or is gouged away from the land surface through actions of water.
Mast
Fruits or nuts used as a food source by animals following regular or irregular fruiting events of tree species.
Mātaitai
Marine reserves established in areas of traditional importance to Māori for customary food gathering. Usually recreational and customary fishing are allowed within the reserve, but not commercial fishing.
Material resources
Physical resources used in the production of goods, as distinct from resources such as energy.
Mauri
A Māori concept, which translates as ‘life force’.
Maximum sustainable yield
The largest average annual catch that may be taken sustainably.
Mean annual low flow (MALF)
A statistic that describes the average amount of water in a river during times of low flow.
Median
In statistics, the middle score in a range of samples or measurements (that is, half the scores will be higher than the median and half will be lower).
Micrograms per cubic metre (µg/m3)
A measure of concentration. A microgram is one-millionth of a gram.
Milligrams per cubic metre (mg/m3)
A measure of concentration. A milligram is one-thousandth of a gram.
Mineral deficiency
The lack of particular minerals which are essential for normal nutrition or metabolism.
Mineral matter
Matter formed from naturally occurring compounds, such as rocks. Contrasts to organic matter.
Mixed cropping
Several crops growing at the same time on the same area of land.
Monitoring network
A network of rivers, streams, lakes, and groundwater bores from which water is tested at regular intervals (say, once a month) to determine its quality.
Mudstone
Soft, sedimentary rock formed from material that contains a large proportion of clay.
National accounts
A condensed set of information about the national economy, which is compiled according to internationally agreed concepts, definitions, classifications, and accounting rules.
National environmental standards
Regulations produced by central government under the Resource Management Act 1991, which are binding on local authorities.
Native
Occurring naturally in New Zealand (indigenous).
Natural cleanfill
Uncontaminated gravel, clay, rock, silt, and other inorganic inert materials.
Natural landscape
A landscape that has not been modified by people or is dominated by natural processes and native plants and animals.
New Zealand threat classification lists
Lists identifying species that are at risk of extinction, and providing information about the level and nature of the risk.
Nitrate
A soluble/dissolved form of the nutrient nitrogen that can be readily used by plants.
Nitrate leaching
The transport of nitrate through soil by water, often to water bodies.
Nitrogen dioxide
A reddish-brown, pungent gas that is produced mainly from the combustion of fossil fuels (coal, gas, and oil) and some industrial processes. It is one of the greenhouse gases.
Nitrogen-fixing plants
Plants (such as clover) that fix nitrogen (a soil nutrient) into the soil. Legume plant roots contain Rhizobium bacteria that convert the air’s nitrogen into soil nitrates. These can be absorbed by other plants, such as pasture grasses.
Nitrogenous fertiliser
Nitrogen-based plant nutrients added to the soil by humans.
Nominal
As used in chapter 3, ‘Household consumption’, refers to figures that have not been adjusted for price change (that is, inflation or deflation); also referred to as actual current figures.
Non-point source pollution
Pollution that does not have a single point of origin – for example, pollutants that are carried from agricultural or urban land into rivers by rainfall run-off, or that soak through soil into groundwater. See also point-source pollution.
Non-renewable
Matter that is unable to be replaced or regenerated over time.
Nutrient
Chemicals needed by plants and animals for growth, especially nitrogen and phosphorus.
Nutrient cycling
The continuous cycling through an ecosystem of minerals, compounds, or elements which promote biological growth or development.
Nutrient run-off
Nutrients that are not absorbed by soil and drain into bodies of water, either in surface or groundwater flows.
Olsen P
Olsen phosphate, the phosphate that is available for plant uptake.
Organic carbon
Carbon that is, or has been, part of a living organism.
Organic matter
Matter that has come from a recently living organism; that is capable of decay or the product of decay; or that is composed of organic compounds. Contrasts to mineral matter.
Organic pollution
In freshwater, pollution from organic waste, such as sewage from wastewater treatment plants; and discharges of carbohydrate and protein material from timber treatment plants, meat works, and dairy factories. Does not include persistent organic pollutants for the purposes of this report.
Organic waste
Waste from once-living organisms, including garden waste (green waste), food scraps, biosolids, and commercial organic wastes. It can sometimes include wastes that may biodegrade in landfills, such as paper, cardboard, and untreated wood.
Organisation for Economic Co-operation and Development (OECD)
This organisation works to address the economic, social, and environmental challenges of globalisation. It has 30 member countries.
Organochlorine
A chemical that contains carbon and chlorine atoms joined together. Some organochlorines are persistent (remain chemically stable) and present a risk to the environment and human health, such as dioxin and polychlorinated biphenyls (PCBs).
Ozone-depleting substances
Chemical substances that cause a net loss of ozone in the stratosphere, usually long-lived man-made gases, such as CFCs.
Ozone layer
The layer of ozone gas that lies 20–25 kilometres above the earth. It plays an important role in protecting the earth from some harmful effects of the sun.
Parent material
Material from which soil develops.
Parent rock
The rock from which soils are derived through weathering.
Particle density
The density of soil particles, used to calculate its porosity and water availability.
Pastoral hill country
Hilly landscapes that are covered in pasture.
Pellet fire
An enclosed heating appliance with a controlled feed of compressed wood pellets.
Percentile
A statistic that indicates the relative rank of a value (or measurement) among a range of values. For example, the 95th percentile is the value below which 95 per cent of all values in a range will lie (and only 5 per cent of values will exceed).
Perennial crop
A crop from plants that live for more than one year, such as nuts and berryfruit.
Persistent organic pollutants (POPs)
Pollutants composed of polychlorinated biphenyls (PCBs), dioxins, and certain organochlorine pesticides that remain in the environment for long periods of time. They can be highly toxic and are widely dispersed, usually by water or wind.
Pest control
The regulation or management of a species defined as a pest, usually because it is believed to be detrimental to human health, the ecology, or the economy.
Pest species
An organism that has characteristics regarded as injurious or unwanted, most often because it causes damage to agriculture by feeding on crops or acting as a parasite on livestock. An animal may also be a pest when it causes damage to a wild ecosystem or carries germs within human habitats.
Pesticide
A chemical substance used to kill unwanted animals and plants, including herbicides (which kill vegetation), insecticides (which kill insects), and fungicides (which kill fungi). See also agrichemical.
Petajoule (PJ)
The unit used to measure energy production on a national scale. One petajoule is a million billion joules (1015J) and roughly equivalent to a coastal tanker load of 25 million litres of oil, or all the electricity used in Nelson in a year, or more than 10 days’ output from the Huntly Power Station when it is operating at full capacity.
pH
The degree of acidity or alkalinity as measured on a scale of 0 to 14 where 7 is neutral, less than 7 is more acidic, and more than 7 is more alkaline.
Plantation forestry
Forest that is grown for an economic return; can be either exotic, or intensively managed indigenous species.
PM10 particulates
Airborne particles that are smaller than 10 µm in diameter (about a fifth of the thickness of a human hair). They are produced by the combustion of wood and fossil fuels, as well as by various industrial and natural processes.
PM2.5 particulates
Airborne particles that are smaller than 2.5 µm in diameter and mostly come from combustion sources (see PM10 particulates). Most particulate matter from natural sources is larger than 2.5 µm in diameter.
Point source pollution
Discharge of pollutants from a single fixed point, such as a pipe. Examples include discharges from wastewater treatment plants and factories. See also non-point source pollution.
Pollinator
The biotic agent (vector) that moves pollen from a flower’s male anthers to the female stigma of a flower to accomplish fertilisation. The most recognised pollinators are bees.
Pollutant
See contaminant.
Potentially mineralisable nitrogen
The amount of soil organic nitrogen converted to plant-available forms under specific conditions of temperature, moisture, aeration, and time. It is a measure of biological activity and indicates the amount of nitrogen that is relatively rapidly available.
Predator
An organism that feeds on another living organism (its prey).
Primary energy
The amount of energy available for use in New Zealand for energy supply and end use. It includes coal, indigenous oil, and natural gas, imported oil and oil products, and hydro. It takes into account imports and exports, and allows for changes in energy stocks. By convention, fuels used for international transport are excluded.
Primary production
The production of goods and services from the primary sector, such as agriculture, horticulture, and forestry.
Private land
Land in private ownership – that is, land not managed by the Department of Conservation or any other public body.
Product stewardship
A product-centred approach that helps reduce the environmental impact of manufactured products, by having producers, brand owners, importers, retailers, consumers, and other parties accept responsibility for the environmental effects of their products, from the time they are produced until they are finally disposed of.
Production rate
The speed at which value or wealth is created by producing a good or service.
Productive capacity
The productive yield per unit of land.
Productivity
In environmental terms, the measure of the amount of life that can be supported in an area. It is determined by the availability of nutrients and light.
Proxy measure
A measure of something that is used instead of a more exact measure that may not be practical or possible.
Quota management system (QMS)
A system introduced in 1986 to manage New Zealand commercial fisheries, based on individual transferable property rights. It allocates each commercial fisher a share of the total allowable commercial catch, which the fisher may catch or trade the right to. Allowances for recreational and customary Māori catch are made before the total allowable commercial catch is set. Species outside the QMS are managed under a permit system that provides no tradeable rights.
Rāhui
Temporary protection of a place or resources by restricting access or harvest. It is set in place by an iwi or a hapū and may be voluntary or gazetted.
Real
In statistics, figures that have been adjusted to remove the impact of price change (that is, inflation or deflation).
Recovered materials
Materials that have been collected for recycling and reprocessed to create a new material.
Recreational water quality
Water quality that is defined by the microbiological health risk it poses to swimmers or others undertaking contact recreation on or in the water. See also bacteria and E. coli.
Recycled
Waste that has been processed into a new material.
Recycling
The act of collecting and depositing materials that can be recycled (such as glass, plastic containers and bottles, aluminium and steel cans, paper, and card), and the processes involved in reusing the materials.
Refrigerants
A range of gases used in refrigerators, cool stores, air conditioning units, and dehumidifiers.
Remediate
Action taken to remove contamination from a site.
Remediation
The removal or destruction of hazardous substances from a site so it is no longer ‘contaminated land’ according to the definition in the Resource Management Act 1991.
Renewable energy
Energy from sources that do not become depleted or degraded for following generations, such as solar, wind, hydro, biomass, tidal, wave, and ocean currents power. Geothermal energy is considered renewable, although these fields can be depleted if fluids are extracted at a higher rate than they are replenished.
Renewable freshwater resource
The total amount of water flowing into a region (mainly as rainfall), minus any natural losses (mainly through evaporation) before it flows into the sea.
Residual waste
Waste remaining after activities undertaken to reduce, reuse, recycle, recover, and treat materials.
Resource efficiency
Effective use of materials and energy to produce goods and services. This may be achieved, for example, through improved manufacturing processes, updating equipment, and technological advancements.
Resource intensity
Using high quantities of materials and energy to produce goods and services. Contrasts to resource efficiency.
Resource Management Act 1991
New Zealand’s main piece of environmental legislation, which provides the framework for managing the effects of human activities on the environment.
Retrofitting
Updating older systems with new technology or features. That is, to install, fit, or adapt a device or system for use with an original or existing system.
Requiring authorities
An authority that can have areas of land designated under the district plan for a public work or project.
Riparian areas/margin
A strip of land, usually of varying width, that is directly adjacent to a waterway.
Riparian planting
Revegetating the riparian margin to reduce erosion and pollutant run-off to the waterway.
Rohe
The geographical territory of an iwi or a hapū.
Rohe moana
A coastal and marine area over which an iwi or a hapū exercises its mana and its kaitiakitanga.
Ruminant animal
Livestock (cattle and sheep) with a complex digestive system consisting of a four-part stomach where microbes break down food. Methane, a greenhouse gas, is a by-product of the microbial activity (enteric fermentation) and mostly released when the animal exhales.
Running average
An average of measurements taken for a specified duration of time, which moves over time. Every new measurement taken after the initial period replaces the earliest measurement in the periodic sequence, and the average is recalculated.
Run-off
Water that is not absorbed by soil but drains off the land into bodies of water.
Rural subdivision
The division of rural land into separate lots.
Saltwater intrusion
The movement of saltwater (seawater) into freshwater (usually groundwater near the coastline).
Sandstone
Sedimentary rock consisting of compressed or cemented sand-sized particles.
Saturation
The point at which soil can no longer accept external inputs, such as water.
Screening survey
A low-cost monitoring method used to make an initial assessment of air quality.
Seabed trawling
A fishing method that involves towing trawl nets along the seafloor. It can be carried out from one vessel or from two vessels fishing cooperatively.
Seabed trench
A deep, elongated depression or valley in the ocean floor.
Seamount
A mountain rising from the seafloor, but not reaching the sea’s surface.
Secondary pollutant
A pollutant not directly emitted from a source, but formed by a subsequent chemical reaction. For example, ground level ozone requires precursor pollutants in order to form.
Secondary treatment
The treatment of sewage sludge to degrade its biological content, usually by aerobic biological processes.
Security of supply
Also known as energy security, this has two key dimensions: reliability and resilience. Reliability means users can access the energy services they require, when they require them. Resilience is the ability of the system to cope with shocks and change.
Sediment
Particles or clumps of particles of sand, clay, silt, or plant or animal matter carried in water.
Sedimentation
The accumulation of sediment.
Septic tank
An underground tank that receives, treats, and disposes of human sewage and other wastewater into the surrounding soil. Such tanks usually service houses that are not connected to municipal sewerage treatment stations (such as houses in rural areas).
Sequestration
In forestry, the uptake of carbon dioxide by trees.
Set-net fishing
A fishing method where a net is placed in water with floats at the top and weights on the bottom. Fish are caught as they swim into the net.
Sewage
Liquid waste formed from human excreta (faeces and urine) and other household wastewater from cooking, washing, cleaning, and so on.
Sewage sludge
A by-product of sewage collection and treatment processes, also known as biosolids.
Sewerage
A network of underground pipes (sewers) that carries sewage and wastewater to and from treatment stations.
Shelter belt
Trees or shrubs that are planted in a row to provide stock or human dwellings with shelter and protection from the wind.
Short-rotation croplands
Arable cropping such as the cultivation of grains, fodder crops, and vegetables.
Siltation
The deposition or accumulation of silt.
Silviculture
The science and practice of growing, establishing, and maintaining forests.
Soil
Soil is the layer of minerals and organic matter that forms the earth’s crust. It is formed over time by the interaction of climate and living organisms on parent material, which can be a mixture of inorganic and organic materials.
Soil acidification
A gradual increase in a soil’s acidity (pH) due to both natural processes and land management.
Soil compaction
Deterioration of soil structure (the size, shape, and stability of soil particles and the spaces between and within these particles). See also compaction.
Soil conservation
Measures taken to preserve a soil resource.
Soil fertility
The ability of a soil to provide enough nutrients for plant growth.
Soil health
Synonymous with both the quality and condition (biological, chemical, nutrient, and physical) of a soil type, relating to its natural characteristics or sustained use.
Soil intactness
Expresses whether soils are staying in place on the land surface and what factors may contribute to soil movement or loss (that is, soil erosion).
Soil nutrient enrichment
The addition of soil nutrients by the application of fertilisers or other agrichemicals, and organic matter such as compost, or through the use of nitrogen-fixing plants such as clover.
Soil resource
The soil that occurs naturally and is of use to humans.
Soil structure
The way soil particles are arranged together (aggregated).
Soil type
The classification of a soil, based on its chemical and physical properties.
Solid waste
All waste generated as a solid or converted to a solid for disposal, including paper, plastic, glass, metal, electronic goods, furnishings, and organic wastes.
Solid waste analysis protocol
A baseline measurement programme to provide generic solid waste composition data for New Zealand.
Special waste
Wastes that pose particular management and/or disposal problems, and need special care, such as used oil, tyres, end-of-life vehicles, batteries, and electronic goods.
Species
One of the basic units of biological classification. A species comprises individual organisms that are very similar in appearance, anatomy, physiology, and genetics, due to having relatively recent common ancestors; and can interbreed.
Species diversity
The variety (or number) of species within a particular geographic area.
Sponge
Animal belonging to a group of sedentary filter-feeding invertebrates.
Status
In reference to fish stocks, their condition; in technical terms, how a stock compares with the target biomass level.
Stewardship
The duty of care placed on everyone – government, business, and the community – to prevent waste and recover resources. See also kaitiakitanga.
Stocking rate
The number of livestock per unit area of land (such as per hectare).
Storage sources
Lakes and reservoirs (including reservoirs created by the damming or diversion of rivers).
Stormwater
Rainwater run-off that is channelled through drains from roads and urban properties into waterways and the sea.
Sulphur dioxide
A colourless gas with a pungent smell, produced during the combustion of fuels containing sulphur, such as coal and diesel.
Sulphur hexafluoride
A non-toxic, non-flammable gas, which is chemically very stable. Its predominant commercial use is in the electrical sector as an insulant.
Surface mine
An area of land where minerals are extracted from its surface.
Surface water
Water on the land surface that flows in channels (rivers and streams) and lies in depressions (lakes). Note that, in this report’s discussions of water allocation, lakes are not included in the definition of surface water.
Sweep
In fishing, the area trawled over by a vessel towing gear along or near the seabed.
Taiāpure
Fishing areas with special importance to local Māori, managed by the community with involvement from local iwi and hapū.
Tangata kaitiaki/tiaki
Customary-take guardians elected by iwi and hapū, and appointed by the Minister of Fisheries. These guardians are called tangata kaitiaki in the North Island and tangata tiaki in the South Island. They can issue permits to allow the harvest of aquatic life within rohe moana and recommend additional bylaws to influence the use of the resource.
Tangata whenua
People of the land; the indigenous people of New Zealand. In relation to a particular area, it means the iwi or hapū that holds mana whenua over that area.
Tāonga
A resource or object that is highly valued by Māori; a treasure.
Tapu
A Māori concept of ‘sacred’ or ‘forbidden’.
Target biomass level
The Fisheries Act 1996 requires that fish stocks are managed so their numbers stay at or above the target biomass level. Generally, this is set at the level that can produce the maximum sustainable yield.
Tauranga waka
Canoe landing sites.
Taxonomy
The practice and science of classification of living organisms into taxonomic units known as taxa.
Technology taker
An entity that receives technology that has developed elsewhere and adapts it for its own needs, rather than developing its own unique technology.
Temperature inversion
A layer of warm air that sits over a layer of cooler air near the ground. Because cool air is heavier than warm air, it often remains trapped close to the ground. Air pollution that gets trapped beneath the inversion layer can build up, causing air pollution concentrations to increase.
Territorial sea
Area of sea extending seaward from the coast to 12 nautical miles offshore.
Tertiary treatment
The final stage in treating wastewater, typically involving the removal of substances such as nitrates and sometimes including disinfection of the water.
Threatened species
Any animal or plant species that is vulnerable to extinction if factors causing its vulnerability are not reversed.
Threshold
The dose or exposure, below which a significant adverse effect is not expected.
Tikanga Māori
Māori customary values, practices, and traditions.
Topography
The natural surface features of a land area, including its shape and relief.
Topsoil
The uppermost layer of soil, which has the highest concentration of organic matter and micro-organisms; this is where most of the earth's biological soil activity occurs.
Total allowable catch
The total amount of fish allowed to be harvested each year by both commercial and non-commercial fishers.
Total carbon content
The amount of carbon present in a soil, measured from the status of the soil’s organic matter.
Total nitrogen content
The amount of nitrogen present in a soil, measured from the soil’s organic nitrogen reserves.
Toxic
The quality or degree of being poisonous or harmful to plant, animal, or human life.
Trace gas
A minor constituent of the atmosphere.
Trade waste
Liquid wastes gener ated by industry and business and disposed of through the sewerage system. It includes a range of hazardous materials resulting from industrial and manufacturing processes.
Transfer stations
Facilities where waste collections are deposited and sorted into recyclable and non-recyclable waste. Recyclable waste is then transferred for processing and non-recyclable waste is transferred to landfills.
Trawl catch effort processing returns (TCEPR)
Forms completed by commercial fishers, providing information to the Ministry of Fisheries.
Trawl effort
The amount of trawling undertaken, expressed in either area terms (square kilometres swept) or number of trawls.
Trawler
A fishing boat that uses a trawl net or dragnet for fishing.
Trawling
Fishing methods where a single vessel or pair of vessels tow a large netting bag (trawl net).
Treated timber
Wood that contains preservative chemicals (such as copper, chrome, or arsenic) and requires careful disposal to avoid harming the environment.
Tree line
The edge of the habitat at which trees are capable of growing. Beyond the tree line, usually at high altitude, trees are unable to grow because environmental conditions are inappropriate.
Triple bottom line (sustainability) reporting
A reporting technique that allows organisations to assess their performance against economic, environmental, and social criteria.
Trophic level index
A six-category index used to monitor and report on the nutrient status of lakes in New Zealand, using measures of nitrogen, phosphorus, algal biomass, and visual clarity.
Tunnel gully
An erosion process in which water percolates through subsoils, forming caves or tunnels that often cause surface subsidence.
Tussock grasslands
Native land cover of tussock grasses.
Typology
The organisation of items into groups based on their shared characteristics.
Unconfined aquifer
Aquifers that are ‘open’ to the land surface – that is, there is no low-permeability confining layer between them and the land surface. Typically shallow, they are normally composed of permeable surface sands and gravels and recharged directly by rainfall percolating from the land surface. See also confined aquifer.
Urupā
Māori traditional burial grounds.
Used oil
Oil contaminated through use with substances that can be hazardous to human health and the environment.
UV index
An index used to inform the public about the intensity of ultraviolet (UV) radiation. The larger the number, the higher the risk of skin damage.
Variables
Properties of objects that take on different values that can be measured or counted.
Varroa mite
An Asian mite (Varroa jacobsoni syn. V. destructor) that is a parasite of honeybees.
Vegetation
A general term for the plant life of a region; the ground cover provided by plants.
Versatile soil
A soil that is suited to a variety of uses, including those that are demanding on soil structure, such as cultivation and cropping.
Vertebrate
An animal that has a backbone or spinal column. Opposite of invertebrate.
Viticulture
The cultivation of grapes for use in the production of wine.
Wāhi tapu
Special and sacred sites for Māori.
Waste
Any material (solid, liquid, or gas) that is unwanted, unvalued or both, and discarded or discharged.
Waste disposal
The final placement of waste.
Waste electronic and electrical equipment
Products that are dependent on electric currents or electromagnetic fields to work, and which are no longer required and due for disposal. Examples include fridges, fluorescent lamps, toasters, computers, and mobile phones.
Waste hierarchy
The order of preferred waste management options. The most preferred option is to reduce, followed by reuse, recycle, recover, treat, and lastly, dispose of.
Waste management plans
Plans produced by territorial authorities outlining the waste management and minimisation activities undertaken in their area.
Waste minimisation
All activities aimed at preventing, reducing, reusing, or recycling waste.
Waste prevention
Practices that avoid and reduce the generation of waste.
Waste recovery
The extraction of materials or energy from waste for further use or processing, including making materials into compost.
Waste sector
The collective term for industries and businesses that are specifically involved in the collection, disposal, or, reprocessing of waste and recycled materials.
Wastewater
A by-product of sewage, liquid trade waste collection, and treatment processes.
Water column
The volume of water between the seabed and the sea’s surface. Regional councils are responsible for the sea’s water column from the foreshore to the outer limits of the territorial sea.
Water quality
The ‘health’ of freshwater, as defined by measures of its physical, biological, and chemical properties, as well as other attributes valued by users (such as its aesthetic quality). See also aesthetic/amenity value.
Weed
A plant that is considered to be unwanted or a nuisance. The term is often used to describe native or non-native plants that grow and reproduce aggressively.
Wetlands
Wet areas of land or shallow water that support plants and animals that have specifically adapted to living in those conditions.
Whakapapa
Māori genealogy; ancestry.
Whānau
Māori family group.
Wood burner
An appliance designed for or capable of burning wood, generally to provide heat for households.
Glossary
December 2007
© Ministry for the Environment