Effects of chloride and nutrients on freshwater plankton communities
Increasing chloride concentrations threaten freshwater zooplankton. We questioned the protectiveness of the Canadian Water Quality Guideline for chloride because it is based on individual species studied under laboratory conditions and does not account for potential interactive factors, such as nutr...
Saved in:
Published in | Limnology and oceanography letters Vol. 8; no. 1; pp. 48 - 55 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken, USA
John Wiley & Sons, Inc
01.02.2023
Wiley |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Increasing chloride concentrations threaten freshwater zooplankton. We questioned the protectiveness of the Canadian Water Quality Guideline for chloride because it is based on individual species studied under laboratory conditions and does not account for potential interactive factors, such as nutrient concentration. We exposed plankton communities to 30 chloride concentration increments for 6 weeks, crossed with either ambient or high nutrient treatments. Total zooplankton abundance, biomass, and richness declined with increasing chloride, with losses observed below the Canadian Water Quality Guideline. Nutrients did not affect the impact of chloride on zooplankton. Phytoplankton and protist responses varied by nutrient level. Under low nutrients, phytoplankton and protist abundance, biomass, and richness increased with chloride. Under high nutrients, phytoplankton and protist abundance and biomass were unaffected while richness decreased with chloride. These results indicate that current water quality guidelines do not sufficiently protect plankton and that nutrient context may alter phytoplankton and protist response. |
---|---|
Bibliography: | Associate editor Data Availability Statement D.A.G. and S.E.A. led the conception and design of the experiment. B.S.S. contributed to the design of the experiment. D.A.G. and S.E.A. conducted the experiment. D.A.G. and I.B.F. processed lab samples, conducted the data analyses and led the writing of the manuscript. All authors provided feedback on the manuscript. https://doi.org/10.5061/dryad.b8gtht7c8 Data and metadata are available in the Dryad repository at Author Contribution Statement Alison Margaret Derry . |
ISSN: | 2378-2242 2378-2242 |
DOI: | 10.1002/lol2.10202 |