Elevated surface chlorophyll associated with natural oil seeps in the Gulf of Mexico
Elevated surface chlorophyll associated with natural oil seeps in the Gulf of Mexico
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DOI：
10.1038/ngeo2631
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发表时间：
2016-03
影响因子：
18.3
通讯作者：
N. D'souza;A. Subramaniam;A. Juhl;Mark A. Hafez;A. Chekalyuk;S. Phan;Beizhan Yan;I. MacDonald;Sarah C. Weber;J. Montoya
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作者：
N. D'souza;A. Subramaniam;A. Juhl;Mark A. Hafez;A. Chekalyuk;S. Phan;Beizhan Yan;I. MacDonald;Sarah C. Weber;J. Montoya
天然碳氢化合物渗漏发生在沿着大陆边缘的海底，占释放到海洋中的石油的47%。众所周知，碳氢化合物渗漏可支持当地的底栖生物生产力，但对上覆水柱中的光合生物的影响却知之甚少。在这里，我们提出的意见与高时空分辨率的叶绿素浓度在北方墨西哥湾使用situandshipboard流通过荧光测量从2012年5月至7月，以及分析海洋彩色卫星图像从1997年至2007年。所有这三种方法都揭示了受天然碳氢化合物渗漏影响的沃茨中叶绿素浓度的升高。渗漏点上方的温度和营养概况表明，富含营养的水从深处涌上来，这可能有助于浮游植物生长，从而支持观察到的较高叶绿素浓度。由于上升流发生在世界各地的天然渗漏点，
Natural hydrocarbon seeps occur on the sea floor along continental margins, and account for up to 47% of the oil released into the oceans. Hydrocarbon seeps are known to support local benthic productivity, but little is known about their impact on photosynthetic organisms in the overlying water column. Here we present observations with high temporal and spatial resolution of chlorophyll concentrations in the northern Gulf of Mexico usingin situand shipboard flow-through fluorescence measurements from May to July 2012, as well as an analysis of ocean-colour satellite images from 1997 to 2007. All three methods reveal elevated chlorophyll concentrations in waters influenced by natural hydrocarbon seeps. Temperature and nutrient profiles above seep sites suggest that nutrient-rich water upwells from depth, which may facilitate phytoplankton growth and thus support the higher chlorophyll concentrations observed. Because upwelling occurs at natural seep locations around the world,,, we conclude that offshore hydrocarbon seeps, and perhaps other types of deep ocean vents and seeps at depths exceeding 1,000 m, may influence biogeochemistry and productivity of the overlying water column.