Declining Mercury Concentrations in Bluefin Tuna Reflect Reduced Emissions to the North Atlantic Ocean.
Declining Mercury Concentrations in Bluefin Tuna Reflect Reduced Emissions to the North Atlantic Ocean.
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DOI：
10.1021/acs.est.6b04328
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发表时间：
2016-12-06
影响因子：
11.4
通讯作者：
Fisher, Nicholas S.
中科院分区：
文献类型：
--
作者：
Lee, Cheng-Shiuan;Lutcayage, Molly E.;Chandler, Emily;Madigan, Daniel J.;Cerrato, Robert M.;Fisher, Nicholas S.
金枪鱼是海洋食物网中的顶端捕食者，可以积累高浓度的汞，并为美国人口提供比任何其他来源更多的汞(~40%)。测量了2004-2012年在西北大西洋捕获的1292尾大西洋蓝鳍金枪鱼(Thunnus Thynnus)的汞含量。从20世纪90年代到2000年代初的8年间，血汞浓度和变异性随着长度、体重和年龄的增加而非线性增加，范围从0.25mgkg−1到3.15mgkg−1，并以每年0.018±0.003 mg kg hg1的速度显著下降，降幅为19%。值得注意的是，这一下降与此期间北美和北大西洋大气汞浓度的人为汞排放速率的下降相平行，表明最近减少大气汞负荷的努力已迅速向上传播到具有商业重要性的物种的海洋食物网。这是第一个表明减排努力导致大型长寿鱼类汞浓度降低的证据。
Tunas are apex predators in marine food webs that can accumulate mercury (Hg) to high concentrations and provide more Hg (~40%) to the U.S population than any other source. We measured Hg concentrations in 1292 Atlantic bluefin tuna (ABFT, Thunnus thynnus) captured in the Northwest Atlantic from 2004 to 2012. ABFT Hg concentrations and variability increased nonlinearly with length, weight, and age, ranging from 0.25 to 3.15 mg kg−1, and declined significantly at a rate of 0.018 ± 0.003 mg kg−1 per year or 19% over an 8-year period from the 1990s to the early 2000s. Notably, this decrease parallels comparably reduced anthropogenic Hg emission rates in North America and North Atlantic atmospheric Hg0 concentrations during this period, suggesting that recent efforts to decrease atmospheric Hg loading have rapidly propagated up marine food webs to a commercially important species. This is the first evidence to suggest that emission reduction efforts have resulted in lower Hg concentrations in large, long-lived fish.
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影响因子：
8.3
作者：
Mason RP;Choi AL;Fitzgerald WF;Hammerschmidt CR;Lamborg CH;Soerensen AL;Sunderland EM
通讯作者：
Sunderland EM
DOI：
10.3390/ijerph6061894
发表时间：
2009-06
影响因子：
--
作者：
Mozaffarian D
通讯作者：
Mozaffarian D
影响因子：
56.9
作者：
Harris, HH;Pickering, IJ;George, GN
通讯作者：
George, GN
影响因子：
2.7
作者：
Bonito LT;Hamdoun A;Sandin SA
通讯作者：
Sandin SA
影响因子：
2.4
作者：
BLOOM, NS
通讯作者：
BLOOM, NS