Mercury isotopes and birds
Web16 nov. 2024 · Mass-dependent isotope values (δ 202 Hg) are elevated in amphipods from the Kermadec Trench (0.91 ±0.22‰, n = 12) compared to the Mariana Trench (0.26 ±0.23‰, n = 13), suggesting a higher level of microbial demethylation of the methyl-mercury pool before incorporation into the base of the foodweb. Our study suggests that mercury … Web20 jan. 2024 · - Sample preparation and analyses for metal, stable isotopes and co-related environmental factors. - Habitat mapping in ArcView GIS. - Assisted other students with graduate thesis work on amphibian and plant toxicity. - Co-authored work on lead concentrations in bird bones and mercury concentrations and trends in a naturally …
Mercury isotopes and birds
Did you know?
WebVirtually all biotic, dark abiotic, and photochemical transformations of mercury (Hg) produce Hg isotope fractionation, which can be either mass dependent (MDF) or mass independent (MIF). The largest range in MDF is observed among geological materials and rainfall impacted by anthropogenic sources. The largest positive MIF of Hg isotopes (odd-mass … WebMercury (Hg) stable isotope analysis is an emerging technique that has contributed to a better understanding of many aspects of the biogeochemical cycling of Hg in the …
Web1 jun. 2009 · Mercury exposure may be linked to several sources of variation related to habitat conditions and species ecology. In generalist birds, feeding habits may change quickly in response to environmental conditions, prey availability and individual requirements. Stable nitrogen isotope ratios (δ15N) were used as a marker of trophic … Web9 aug. 2024 · In the present pilot study, we examined stable mercury isotope ratios in blood of 4 species of songbirds and the invertebrates they are likely foraging on in multiple habitats in a small watershed of mixed forest and wetlands in Acadia National Park in …
WebActivities and Societies: MarineQuest, Skywatch Bird Rescue, Audubon North Carolina Dissertation: Biomagnification of mercury in the food web of the lower Cape Fear River, North Carolina Web17 dec. 2024 · 2. THE MERCURY ISOTOPE SYSTEM Mercury has seven stable isotopes with the following natural abundances in the environment: 196Hg = 0.155%, 198Hg = …
WebA prerequisite for environmental and toxicological applications of mercury (Hg) stable isotopes in wildlife and humans is quantifying the isotopic fractionation of biological reactions. ... individual birds reflects. 4
Web25 jan. 2011 · Mercury isotopes in the flora and fauna of the Arctic may be linked to the amount of ice cover present, ... For the study, Native Alaskans and biologists went out in field groups to collect the eggs of the murres, a bird that nests year-round in three coastal Alaskan regions. They then analyzed the mercury isotopes present. mckeen securityWeb42+. Mercury Isotopes are mainly used in the study of the deposition and emission of Hg in both terrestrial and aquatic ecosystems. In one experiment in Canada three different Mercury isotopes (Hg-198, Hg-200 and Hg-202) were used to find out how the route of entry of mercury to an ecosystem affects the amount that becomes accumulated in fish. lice machineWebBoth PM2.5 and total gaseous mercury (TGM) serve as an important atmospheric pollutant in urban areas and pose a health risk to human. Because PM2.5 and PBM are strongly bounded, and different mer-cury isotope signature could be observed from different source. So mercury isotope can be used as a tracer for PM2.5 sources. TGM and lice microwaveWeb9 aug. 2024 · In the present pilot study, we examined stable mercury isotope ratios in blood of 4 species of songbirds and the invertebrates they are likely foraging on in … mckee obituary 2022WebSeabirds accumulate significant amounts of mercury ... liver, brain, kidneys, blood and feathers) were asse … Mercury isotopes of key tissues document mercury metabolic processes in seabirds Chemosphere. 2024 Jan;263:127777. doi: 10.1016/j.chemosphere.2024.127777. ... Birds Environmental Monitoring ... mckee oil cumberland riWeb5 jan. 2016 · The odds and evens of mercury isotopes: applications of mass-dependent and mass-independent isotope fractionation. Elements 5, 353–357 (2009). Article CAS Google Scholar lice mattress treatmentWeb9 feb. 2024 · In vivo fractionation of mercury isotopes in tissues of a mammalian carnivore (Neovison vison) February 2024; ... (MeHg)), as observed in birds, 11,12 fish, 13 and mammals, ... mckee offshore fisherman