Bioaccumulation and biomagnification of mercury and methylmercury in four sympatric coastal sharks in a protected subtropical lagoon
作者： Adam G. Matulik , David W. Kerstetter , Neil Hammerschlag , Timothy Divoll , Chad R. Hammerschmidt
DOI: 10.1016/J.MARPOLBUL.2017.01.033
关键词: Bioaccumulation 、 Apex predator 、 Biomagnification 、 Mercury (element) 、 Ecology 、 Methylmercury 、 Marine ecosystem 、 Trophic level 、 Bay 、 Biology
摘要: Mercury bioaccumulation is frequently observed in marine ecosystems, often with stronger effects at higher trophic levels. We compared total mercury (THg) and methylmercury (MeHg) from muscle length, comparative isotopic niche, diet (via δ13C δ15N) among four sympatric coastal sharks Florida Bay (USA): blacknose, blacktip, bull, lemon. blacknose blacktip increased significantly size, whereas bull lemon had a high variance relative to size. Both δ15N were consistent general resource use position relationships across all species. A significant relationship was between sharks, suggesting an ontogenetic shift possibly dietary change. Multiple regression showed that the strongest factors regarding individuals Additional research recommended resolve mechanisms determine biomagnification individual shark
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