Bioaccumulation of methylmercury in wood frogs and spotted salamanders in Vermont vernal pools
| Autor: | Steven D. Faccio, Vivien F. Taylor, Kate L. Buckman, John D. Lloyd, Amanda N. Curtis |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Amphibian Male Ranidae Health Toxicology and Mutagenesis Fresh Water 010501 environmental sciences Management Monitoring Policy and Law Forests Toxicology 01 natural sciences Ambystoma Article chemistry.chemical_compound Ambystoma maculatum biology.animal Ecotoxicology Animals Methylmercury 0105 earth and related environmental sciences Ovum biology Lithobates General Medicine Feeding Behavior Methylmercury Compounds biology.organism_classification Bioaccumulation Diet 010602 entomology chemistry Environmental chemistry Vernal pool Larva Female Bioindicator Vermont |
| Zdroj: | Ecotoxicology |
| Popis: | Mercury (Hg) has accumulated in forested landscapes in the Northeastern U.S., and hotspots with enhanced deposition have been identified throughout the region. Due to a variety of favorable landscape characteristics, including relatively high dissolved organic carbon (DOC), fluctuating water levels, and low pH and dissolved oxygen, vernal pools provide ideal conditions for the conversion of Hg to its more toxic and bioavailable form, methylmercury (MeHg). Yet little is known about the concentrations, speciation, and bioavailability of Hg in vernal pools, or its bioaccumulation in vernal pool fauna and potential export into terrestrial systems. We investigated the role of forest cover type on the bioaccumulation of MeHg in wood frog (Lithobates sylvatica) and spotted salamander (Ambystoma maculatum) eggs, larvae, and adults, and investigated relationships among MeHg and water chemistry (pH, DOC). Water samples from pools located in coniferous stands had greater concentrations of THg and MeHg compared to deciduous pool water, and showed significant positive correlation to DOC (r = 0.683, P |
| Databáze: | OpenAIRE |
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