collection
https://read.qxmd.com/read/25649837/the-english-channel-contamination-status-of-its-transitional-and-coastal-waters
#21
JOURNAL ARTICLE
A D Tappin, G E Millward
The chemical contamination (organic compounds, metals, radionuclides, microplastics, nutrients) of English Channel waters has been reviewed, focussing on the sources, concentrations and impacts. River loads were only reliable for Pb, whereas atmospheric loads appeared robust for Cd, Pb, Hg, PCB-153 and γ-HCH. Temporal trends in atmospheric inputs were decreasing. Contaminant concentrations in biota were relatively constant or decreasing, but not for Cd, Hg and HBCDD, and deleterious impacts on fish and copepods were reported...
June 30, 2015: Marine Pollution Bulletin
https://read.qxmd.com/read/25430966/the-biodiversity-dependent-ecosystem-service-debt
#22
JOURNAL ARTICLE
Forest Isbell, David Tilman, Stephen Polasky, Michel Loreau
Habitat destruction is driving biodiversity loss in remaining ecosystems, and ecosystem functioning and services often directly depend on biodiversity. Thus, biodiversity loss is likely creating an ecosystem service debt: a gradual loss of biodiversity-dependent benefits that people obtain from remaining fragments of natural ecosystems. Here, we develop an approach for quantifying ecosystem service debts, and illustrate its use to estimate how one anthropogenic driver, habitat destruction, could indirectly diminish one ecosystem service, carbon storage, by creating an extinction debt...
February 2015: Ecology Letters
https://read.qxmd.com/read/25260997/analysis-of-fish-dna-biomarkers-as-a-molecular-level-approach-for-ecological-health-assessments-in-an-urban-stream
#23
JOURNAL ARTICLE
Nami Kang, Han-Il Kang, Kwang-Guk An
This study was performed to determine the ecosystem health of an urban stream using DNA damage biomarkers of sentinel fish species along with chemical analyses of water and sediments in the impacted and reference zones. The results based on single-cell gel electrophoresis showed that the extent of DNA damage was significantly elevated in the polluted zone. The severity of DNA damage in the impacted zone was largely attributed to high levels of heavy metals, such as As, Zn, Pb, and Ni. The DNA damage biomarker in benthic fish was sensitive to habitat change, which suggested that this fish species and biomarker are excellent tools for risk assessment...
November 2014: Bulletin of Environmental Contamination and Toxicology
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