Species-specific sensitivity of aquatic macrophytes towards two herbicides

Ecotoxicology and Environmental Safety
Nina CedergreenJens Carl Streibig

Abstract

The s-triazine herbicide terbutylazine, an inhibitor of photosystem II, is often found in surface waters in concentrations < 1 microg L(-1), but concentrations up to 13 microg L(-1) have been measured. To study the effect on the aquatic flora, we tested the sensitivity of 10 aquatic macrophyte species and a natural epiphyte community in a 2-week laboratory multispecies test at constant terbutylazine concentrations and two irradiance regimes. The data were described by a log-logistic concentration-response model and species sensitivity distributions (SSDs) were created from the EC50 and EC10 values. The 5% hazard concentration (HC5) of the EC10-based SSD for terbutylazine was 1 and 3 microg L(-1); hence the low chronic terbutylazine concentrations measured in the environment are not likely to affect the macrophyte community. To compare the species sensitivity between different groups of herbicides, SSDs were constructed from a published study on the sulfonylurea metsulfuron-methyl, an inhibitor of acetolactate synthase. There was no correlation between species-specific sensitivity to the two herbicides; hence, the combined exposure of different herbicides might affect the macrophyte community more broadly rather than seriously a...Continue Reading

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Citations

Dec 24, 2013·Environment International·Muhammad Zaffar HashmiChaofeng Shen
Jan 2, 2013·Ecotoxicology and Environmental Safety·Rikke T RosenkrantzK Ole Kusk
Jul 29, 2009·Journal of Environmental Sciences (China)·Huiyun PanShixiang Gao
Sep 11, 2007·Environmental Pollution·Gertie H P ArtsJac T N M Thissen
Jul 24, 2008·Dose-response : a Publication of International Hormesis Society·Nina CedergreenStephen O Duke
Dec 12, 2019·Environmental Science and Pollution Research International·Jianan ZhouLu Yang
Feb 17, 2007·Pest Management Science·Nina CedergreenJens C Streibig
Aug 23, 2018·EFSA Journal·UNKNOWN EFSA Panel on Plant Protection Products and their Residues (PPR)Ivana Teodorovic
Jan 18, 2021·Environmental Pollution·Cécile PérillonSilvia Mohr
Jun 23, 2010·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Estérine EvrardJean Laroche

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