Glyphosate Sublethal Effects On The Population Dynamics Of The Earthworm

earthworm_running
Pesticides’ sublethal effects are not regularly taken into account when assessing agrochemical’s toxicity. With the objective of detecting chronic, sublethal effects of the widely used herbicide glyphosate, an experiment was performed using the earthworm Eisenia fetida as model organism. Earthworm adults were randomly assigned to three glyphosate treatments: control (no glyphosate), regular dose for perennial weeds, and double dose. Six E. fetida individuals were placed in each pot. Two random pots were taken weekly from each treatment and the number of adults, individual weight, number of cocoons, and presence and number of young earthworms were recorded. A matrix analysis was performed with the data. The matrix population model built showed that while the control population had a positive growth rate, both glyphosate treatments showed negative growth rates. The results suggest that under these sublethal effects, non-target populations are at risk of local extinction, underscoring the importance of this type of studies in agrochemical environmental risk assessment.
Capsule:
Non-target organisms can be at risk of local extinction due to agrochemicals chronic sublethal effects, which are not consistently taken into account in toxicity and risk assessment studies.

LINK: http://link.springer.com/article/10.1007/s11270-014-2207-3
LOOK INSIDE (first 2 pages): http://link.springer.com/article/10.1007%2Fs11270-014-2207-3/lookinside/000.png & http://link.springer.com/article/10.1007%2Fs11270-014-2207-3/lookinside/001.png

Author: Andrew

My name's Andrew Towell, I’m 32 years of age and I was born and live in a coastal town called Hartlepool located in the North East of England. The idea behind starting the blog is for me to research sustainable living practices, I enjoy growing plants so their will be an emphasis on organic food production.

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