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Environmental Impact

From climate change to biodiversity loss - documenting human impacts on the environment

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Abstract

Traditional Toxicity Identification Evaluations (TIE) are applied to identify causal agents in complex environmental samples showing toxicity and rely upon physical or chemical manipulation of samples. However, mutations conferring toxicant resistance provide the opportunity for a novel...

Author(s)
Weston, D. P.; Poynton, H. C.; Major, K. M.; Wellborn, G. A.; Lydy, M. J.; Moschet, C.; Connon, R. E.
Publisher
American Chemical Society, Washington, USA
Citation
Environmental Science & Technology, 2018, 52, 2, pp 859-867
Abstract

Pesticide runoff from terrestrial environments into waterways is often lethal to freshwater organisms, but exposure may also drive evolution of pesticide resistance. We analyzed the degree of resistance and molecular genetic changes underlying resistance in Hyalella azteca, a species complex of...

Author(s)
Major, K. M.; Weston, D. P.; Lydy, M. J.; Wellborn, G. A.; Poynton, H. C.
Publisher
Wiley, Oxford, UK
Citation
Evolutionary Applications, 2018, 11, 5, pp 748-761
Abstract

Activated carbon (AC) sediment amendment for hydrophobic organic contaminants (HOCs) is attracting increasing regulatory and industrial interest. However, mechanistic and well-vetted models are needed. Here, we conduct an 18 month field mesocosm trial at a site containing...

Author(s)
Thompson, J. M.; Hsieh ChingHong; Hoelen, T. P.; Weston, D. P.; Luthy, R. G.
Publisher
American Chemical Society, Washington, USA
Citation
Environmental Science & Technology, 2016, 50, 9, pp 4769-4777
Abstract

Pyrethroid-resistant Hyalella azteca with voltage-gated sodium channel mutations have been identified at multiple locations throughout California. In December 2013, H. azteca were collected from Mosher Slough in Stockton, CA, USA, a site with reported pyrethroid (primarily bifenthrin and...

Author(s)
Heim, J. R.; Weston, D. P.; Major, K.; Poynton, H.; Hartz, K. E. H.; Lydy, M. J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Environmental Pollution, 2018, 235, pp 39-46
Abstract

Pyrethroid insecticides can affect salmonids either indirectly through toxicity to their prey or directly by toxicity to the fish themselves. In support of a study on pyrethroid impacts to Chinook salmon and steelhead trout in the American River (Sacramento, California, USA), 96-h median effective...

Author(s)
Weston, D. P.; Schlenk, D.; Riar, N.; Lydy, M. J.; Brooks, M. L.
Publisher
Wiley-Blackwell, Boston, USA
Citation
Environmental Toxicology and Chemistry, 2015, 34, 3, pp 649-657
Abstract

The recent discovery of pyrethroid-resistant Hyalella azteca populations in California, USA suggests there has been significant exposure of aquatic organisms to these terrestrially-applied insecticides. Since resistant organisms are able to survive in relatively contaminated habitats they may...

Author(s)
Muggelberg, L. L.; Hartz, K. E. H.; Nutile, S. A.; Harwood, A. D.; Heim, J. R.; Derby, A. P.; Weston, D. P.; Lydy, M. J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Environmental Pollution, 2017, 220, Part A, pp 375-382
Abstract

Fipronil is a phenylpyrazole insecticide with increasing urban use. Sixteen urban waterways and municipal wastewater were sampled for fipronil, its environmental degradates, and pyrethroid insecticides. Because findings could not be interpreted with existing data on fipronil degradate toxicity,...

Author(s)
Weston, D. P.; Lydy, M. J.
Publisher
American Chemical Society, Washington, USA
Citation
Environmental Science & Technology, 2014, 48, 2, pp 1290-1297
Abstract

Pyrethroids are widely used insecticides, but minimal information has been published on their presence in municipal wastewater in the United States. Pyrethroids in wastewater from the Sacramento, California, USA, area consisted of permethrin, bifenthrin, cypermethrin, and cyhalothrin, with a...

Author(s)
Weston, D. P.; Ramil, H. L.; Lydy, M. J.
Publisher
Wiley-Blackwell, Boston, USA
Citation
Environmental Toxicology and Chemistry, 2013, 32, 11, pp 2460-2468
Abstract

The authors developed a simple screening-level model of exposure of aquatic species to pyrethroid insecticides for the lower American River watershed (California, USA). The model incorporated both empirically derived washoff functions based on existing, small-scale precipitation simulations and...

Author(s)
Jorgenson, B.; Fleishman, E.; Macneale, K. H.; Schlenk, D.; Scholz, N. L.; Spromberg, J. A.; Werner, I.; Weston, D. P.; Xiao, Q. F.; Young, T. M.; Zhang, M. H.
Publisher
Wiley-Blackwell, Boston, USA
Citation
Environmental Toxicology and Chemistry, 2013, 32, 11, pp 2469-2477
Abstract

The presence of pyrethroids in both urban and agricultural sediments at levels lethal to invertebrates has been well documented. However, variations in bioavailability among sediments make accurate predictions of toxicity based on whole sediment concentrations difficult. A proposed solution to this ...

Author(s)
Harwood, A. D.; Landrum, P. F.; Weston, D. P.; Lydy, M. J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Environmental Pollution, 2013, 173, pp 47-51

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