Data/hora: 07/06/2024 00:45:48

Provedor de dados: 	5	
País: 	France	
Título: 	Hydrothermal vents trigger massive phytoplankton blooms in the Southern Ocean	
Autores: 	Ardyna, Mathieu; Lacour, Léo; Sergi, Sara; D’ovidio, Francesco; Sallée, Jean-baptiste; Rembauville, Mathieu; Blain, Stéphane; Tagliabue, Alessandro; Schlitzer, Reiner; Jeandel, Catherine; Arrigo, Kevin Robert; Claustre, Hervé.	
Data: 	2019-06	
Ano: 	2019	
Resumo: 	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.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00501/61310/64869.pdf

https://archimer.ifremer.fr/doc/00501/61310/64870.pdf

https://archimer.ifremer.fr/doc/00501/61310/64871.pdf

DOI:10.1038/s41467-019-09973-6

https://archimer.ifremer.fr/doc/00501/61310/	
Editor: 	Springer Science and Business Media LLC	
Relação: 	info:eu-repo/grantAgreement/EC/H2020/746748/EU//CAP-ICE

info:eu-repo/grantAgreement/EC/H2020/637770/EU//WAPITI	
Formato: 	application/pdf	
Fonte: 	Nature Communications (2041-1723) (Springer Science and Business Media LLC), 2019-06 , Vol. 10 , N. 1 , P. 2451 (8p.)	
Fonte: 	info:eu-repo/semantics/openAccess

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