Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary.
Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary.
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DOI：
10.1021/es2029137
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发表时间：
2012-02-07
影响因子：
11.4
通讯作者：
Orem, William H.
中科院分区：
文献类型：
--
作者：
Bergamaschi, Brian A.;Krabbenhoft, David P.;Aiken, George R.;Patino, Eduardo;Rumbold, Darren G.;Orem, William H.
红树林沼泽溶解有机碳（DOC）通量占全球陆地DOC向近海通量的10%。最近的调查结果表明，红树林中的汞和甲基汞浓度很高，DOC和汞的种类也经常共存，这引起了人们对汞通量可能也很大的关注。我们使用了一种新的方法来估计出口的DOC，汞，甲基汞沿海沃茨从红树林为主的河口大沼泽地国家公园（佛罗里达，美国）。使用荧光溶解有机物的原位测量作为DOC、过滤后的总汞和过滤后的甲基汞的替代，我们估计DOC产量为180（±12.6）g C m-2 yr-1，这在以前报道的值范围内。虽然以前没有测量过潮汐红树林沼泽的汞和甲基汞排放量，但我们估计的汞排放量（28 ± 4.5 μg总汞m-2年-1和3.1 ± 0.4 μg甲基汞m-2年-1）是陆地湿地通常报告的5倍。这些结果表明，除了有据可查的DOC贡献外，红树林潮汐驱动的输出是附近沿海沃茨汞和甲基汞的重要潜在来源。
The flux of dissolved organic carbon (DOC) from mangrove swamps accounts for 10% of the global terrestrial flux of DOC to coastal oceans. Recent findings of high concentrations of mercury (Hg) and methylmercury (MeHg) in mangroves, in conjunction with the common co-occurrence of DOC and Hg species, have raised concerns that mercury fluxes may also be large. We used a novel approach to estimate export of DOC, Hg, and MeHg to coastal waters from a mangrove-dominated estuary in Everglades National Park (Florida, USA). Using in situ measurements of fluorescent dissolved organic matter as a proxy for DOC, filtered total Hg, and filtered MeHg, we estimated the DOC yield to be 180 (±12.6) g C m–2 yr–1, which is in the range of previously reported values. Although Hg and MeHg yields from tidal mangrove swamps have not been previously measured, our estimated yields of Hg species (28 ± 4.5 μg total Hg m–2 yr–1 and 3.1 ± 0.4 μg methyl Hg m–2 yr–1) were five times greater than is typically reported for terrestrial wetlands. These results indicate that in addition to the well documented contributions of DOC, tidally driven export from mangroves represents a significant potential source of Hg and MeHg to nearby coastal waters.
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影响因子：
8.9
作者：
Gorski, P. R.;Armstrong, D. E.;Krabbenhoft, D. P.
通讯作者：
Krabbenhoft, D. P.
影响因子：
2.9
作者：
KRABBENHOFT, DP;BENOIT, JM;ANDREN, AW
通讯作者：
ANDREN, AW
影响因子：
2.6
作者：
Romigh, Melissa M.;Davis, Stephen E., III;Twilley, Robert R.
通讯作者：
Twilley, Robert R.
影响因子：
2.7
作者：
Downing, Bryan D.;Boss, Emmanuel;Fujii, Roger
通讯作者：
Fujii, Roger
影响因子：
5.2
作者：
Dittmar, T;Hertkorn, N;Lara, RJ
通讯作者：
Lara, RJ