Impacts of crab bioturbation and local pollution on sulfate reduction, Hg distribution and methylation in mangrove sediments, Rio de Janeiro, Brazil
作者： Raquel Rose Silva Correia , Jean Remy Davée Guimarães
DOI: 10.1016/J.MARPOLBUL.2016.05.028
关键词:
摘要: Mercury (Hg) and methylmercury (MeHg) are highly toxic poorly studied in mangroves. Burrowing Uca crabs change sediment topography biogeochemistry thus may affect Hg distribution MeHg formation. We added (203)Hg distribution, Me(203)Hg formation sulfate reduction rates (SRR) aquariums containing leptodactyla; analyzed profiles of SRR cores from two mangroves with distinct environmental impacts. were higher the top (≤6cm) there was no significant difference methylation more or less impacted In aquariums, crab bioturbation favored retention sediment. treatment without crabs, volatilization water concentrations higher. bioturbated but similar both treatments. These findings suggest that bioturbating activity favors also promotes near surface.
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