Spatial and temporal variation in mercury bioaccumulation by zooplankton in Lake Champlain (North America)
| Autor: | Eric K. Miller, Jason J. Williams, Brian P. Jackson, Vivien F. Taylor, Neil C. Kamman, Celia Y. Chen, Deenie M. Bugge |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Health
Toxicology and Mutagenesis Toxicology Zooplankton Article chemistry.chemical_compound Phytoplankton Water Pollution Chemical Animals Methylmercury Trophic level Ecology Seston Quebec Mercury General Medicine Pollution Oceanography chemistry Bioaccumulation Environmental science Eutrophication Bay Water Pollutants Chemical Environmental Monitoring Vermont |
| Zdroj: | Environmental Pollution. 161:343-349 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2011.08.048 |
| Popis: | Trophic transfer of Hg across lakes within a region has been related to multiple environmental factors, but the nature of these relationships across distinct basins within individual large lakes is unknown. We investigated Hg bioaccumulation in zooplankton in basins of differing trophic status in Lake Champlain (Vermont, USA) to determine the strongest predictors of Hg bioaccumulation. Zooplankton were sampled in Malletts Bay (oligotrophic) and Missisquoi Bay (eutrophic) in 2005–2008. Zooplankton in the eutrophic basin had lower concentrations of total Hg and MeHg than those in the oligotrophic basin in all years but 2007, when no bloom occurred in Missisquoi. In addition, Hg concentrations in seston and small zooplankton, sampled during 2009 at 12 sites spanning the lake, decreased with increasing phytoplankton and zooplankton biomass. Thus, Hg bioaccumulation in zooplankton across basins in Lake Champlain is related to trophic status, as observed previously in multiple lake studies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect