Hydrothermal vents trigger massive phytoplankton blooms in the Southern Ocean

被引：98

作者：

Ardyna, Mathieu ^{[1
,2
,3
]}

Lacour, Leo ^{[1
,2
,4
]}

Sergi, Sara ^{[5
]}

d'Ovidio, Francesco ^{[5
]}

Sallee, Jean-Baptiste ^{[5
]}

Rembauville, Mathieu ^{[1
,2
]}

Blain, Stephane ^{[6
,7
]}

Tagliabue, Alessandro ^{[8
]}

Schlitzer, Reiner ^{[9
]}

Jeandel, Catherine ^{[10
]}

Arrigo, Kevin Robert ^{[3
]}

Claustre, Herve ^{[1
,2
]}

机构：

[1] Sorbonne Univ, 181 Chemin Lazaret, F-06230 Villefranche Sur Mer, France

[2] CNRS, LOV, 181 Chemin Lazaret, F-06230 Villefranche Sur Mer, France

[3] Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA

[4] Univ Laval, Takuvik Joint Int Lab, Laval Univ Canada, CNRS France,Dept Biol & Quebec Ocean, Quebec City, PQ G1V 0A6, Canada

[5] Sorbonne Univ, CNRS, LOCEAN, IRD,MNHN,IPSL, F-75005 Paris, France

[6] Sorbonne Univ, F-66650 Banyuls Sur Mer, France

[7] CNRS, Lab Oceanog Microbienne LOM, Observ Oceanol, F-66650 Banyuls Sur Mer, France

[8] Univ Liverpool, Sch Environm Sci, Dept Earth Ocean & Ecol Sci, Liverpool, Merseyside, England

[9] Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Alten Hafen 26, D-27568 Bremerhaven, Germany

[10] Univ Toulouse, CNRS, CNES, LEGOS,IRD,UPS, 14 Ave Edouard Belin, F-31400 Toulouse, France

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

ANTARCTIC CIRCUMPOLAR CURRENT; IRON; IMPACT; WATERS;

D O I：

10.1038/s41467-019-09973-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Hydrothermal activity is significant in regulating the dynamics of trace elements in the ocean. Biogeochemical models suggest that hydrothermal iron might play an important role in the iron-depleted Southern Ocean by enhancing the biological pump. However, the ability of this mechanism to affect large-scale biogeochemistry and the pathways by which hydrothermal iron reach the surface layer have not been observationally constrained. Here we present the first observational evidence of upwelled hydrothermally influenced deep waters stimulating massive phytoplankton blooms in the Southern Ocean. Captured by profiling floats, two blooms were observed in the vicinity of the Antarctic Circumpolar Current, downstream of active hydrothermal vents along the Southwest Indian Ridge. These hotspots of biological activity are supported by mixing of hydrothermally sourced iron stimulated by flow-topography interactions. Such findings reveal the important role of hydrothermal vents on surface biogeochemistry, potentially fueling local hotspot sinks for atmospheric CO2 by enhancing the biological pump.

引用

页数：8

共 35 条

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