Go back to "Publications"

Derivation of nutrient criteria for periphyton biomass objectives

As part of the implementation of the Essential Freshwater Programme, the Ministry for the Environment has contracted Land Water People Ltd. and the National Institute of Water and Atmospheric Research Ltd. to deliver an update to the look-up tables of nutrient criteria to achieve periphyton biomass objectives under the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020).

This study derives nutrient concentrations and exceedance criteria for nitrogen and phosphorus for the purpose of managing the periphyton attribute. It builds on the modelling used to inform the essential freshwater impact analysis (Snelder et al. 2019) by using direct measures of periphyton biomass taken from more sites over a longer time. This study updates our understanding of the dose-response relationship between nutrients and periphyton biomass and has been extensively reviewed.

It should be read together with the guidance document, Guidance on look-up tables for setting nutrient targets for periphyton: second edition.

As part of the implementation of the Essential Freshwater Programme, the Ministry for the Environment has contracted Land Water People Ltd. and the National Institute of Water and Atmospheric Research Ltd. to deliver an update to the look-up tables of nutrient criteria to achieve periphyton biomass objectives under the National Policy Statement for Freshwater Management 2020 (NPS-FM 2020).

This study derives nutrient concentrations and exceedance criteria for nitrogen and phosphorus for the purpose of managing the periphyton attribute. It builds on the modelling used to inform the essential freshwater impact analysis (Snelder et al. 2019) by using direct measures of periphyton biomass taken from more sites over a longer time. This study updates our understanding of the dose-response relationship between nutrients and periphyton biomass and has been extensively reviewed.

It should be read together with the guidance document, Guidance on look-up tables for setting nutrient targets for periphyton: second edition.

See more on...