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Temporal and Spatial Variability of Methylmercury Accumulation in Small Stream Ecosystems
Başlık:
Temporal and Spatial Variability of Methylmercury Accumulation in Small Stream Ecosystems
Yazar:
Oster, Jacob Matthew, author.
ISBN:
9780438144361
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (91 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Andrew Heyes; Laura L. Lapham Committee members: William O. Lamp.
Özet:
Maryland has state-wide fish consumption advisories for mercury, and there is a need to explain these trends. I explore two tools for characterizing MeHg conditions in Maryland. The first explores benthic macroinvertebrates as vectors of MeHg from sediments to fish. I examined macroinvertebrate communities over two years from two first-order streams differing in land-use and historical stream water MeHg concentrations. I assessed temporal and spatial variability in invertebrate populations in conjunction with an assessment of the distribution of MeHg in water and sediment. I tested a second tool, an autonomous continuous water sampler that would allow MeHg to be measured without laborious expeditions. I observed differences in concentrations of MeHg across trophic levels between watersheds and identified a candidate organism as a bioindicator of MeHg exposure risk and watershed MeHg condition, as well as a potential sampling mechanism for MeHg in aquatic ecosystems.
Notlar:
School code: 0117
Tüzel Kişi Ek Girişi:
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(688430.1) | 688430-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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