Long-term effects of common pesticides on aquatic species

New research indicates that commonly-used insecticide mixtures continue to impact aquatic invertebrate species over multiple weeks, even when the chemicals are no longer detectable in water.

Through experiments meant to generally reflect from a multiple-homeowner watershed, investigators found that pesticide mixtures had on the abundance of certain snails, water fleas, and .

"The effects we observed indicate that many species were affected at a sublethal level," said Dr. Simone Hasenbein, lead author of the Environmental Toxicology & Chemistry study.

"Thus, populations exposed to low concentrations of pesticides could be even more sensitive to other abiotic or biotic factors such as invasive species, or changes in salinity or temperature leading to a magnification of multi-stressor situations."

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Lab test commonly used to assess water toxicity

More information: Simone Hasenbein et al. A long-term assessment of pesticide mixture effects on aquatic invertebrate communities, Environmental Toxicology and Chemistry (2015). DOI: 10.1002/etc.3187
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Citation: Long-term effects of common pesticides on aquatic species (2015, November 16) retrieved 12 June 2021 from https://phys.org/news/2015-11-long-term-effects-common-pesticides-aquatic.html
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