Mercury bioaccumulation and trophic transfer in the terrestrial food web of a montane forest
| Autor: | Steven D. Faccio, Christopher C. Rimmer, Eric K. Miller, Kent P. McFarland, Robert J. Taylor |
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| Rok vydání: | 2009 |
| Předmět: |
Male
Food Chain Health Toxicology and Mutagenesis chemistry.chemical_element Urodela Management Monitoring Policy and Law Toxicology Trees Songbirds Soil Animals Soil Pollutants Ecosystem Catharus Arthropods Trophic level biology Raptors Ecology Detritivore General Medicine Biodiversity Feeding Behavior Methylmercury Compounds biology.organism_classification Food web Mercury (element) Diet Plant Leaves chemistry Environmental chemistry Bioaccumulation Predatory Behavior Body Burden Environmental Pollutants Female Omnivore Seasons Environmental Monitoring Vermont |
| Zdroj: | Ecotoxicology (London, England). 19(4) |
| ISSN: | 1573-3017 |
| Popis: | We investigated mercury (Hg) concentrations in a terrestrial food web in high elevation forests in Vermont. Hg concentrations increased from autotrophic organisms to herbivores < detritivores < omnivores < carnivores. Within the carnivores studied, raptors had higher blood Hg concentrations than their songbird prey. The Hg concentration in the blood of the focal study species, Bicknell’s thrush (Catharus bicknelli), varied over the course of the summer in response to a diet shift related to changing availability of arthropod prey. The Bicknell’s thrush food web is more detrital-based (with higher Hg concentrations) in early summer and more foliage-based (with lower Hg concentrations) during late summer. There were significant year effects in different ecosystem compartments indicating a possible connection between atmospheric Hg deposition, detrital-layer Hg concentrations, arthropod Hg concentrations, and passerine blood Hg concentrations. |
| Databáze: | OpenAIRE |
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