Bacteria and Foraminifera: key players in a short-term deep-sea benthic response to phytodetritus

Bacteria and Foraminifera: : key players in a short-term deep-sea benthic response to phytodetritus

ABSTRACT: The deep-sea floor has long been considered a ’food desert’ but recent observations suggest that episodic inputs of relatively fresh organic matter (phytodetritus) occur and that benthic processing of this material may be rapid. Although the responses of the total community in terms of oxy...

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Veröffentlicht in:Marine Ecology Progress Series. - Inter-Research, 1979. - 236(2002) vom: Juli, Seite 23-29
1. Verfasser: Moodley, Leon (VerfasserIn)
Weitere Verfasser: Middelburg, Jack J., Boschker, Hendricus T. S., Duineveld, Gerard C. A., Pel, Roel, Herman, Peter M. J., Heip, Carlo H. R.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2002
Zugriff auf das übergeordnete Werk:Marine Ecology Progress Series
Schlagworte:Deep-sea Benthic-pelagic coupling Tracer Respiration Bacteria PLFA Foraminifera Benthos Physical sciences Biological sciences
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520 |a ABSTRACT: The deep-sea floor has long been considered a ’food desert’ but recent observations suggest that episodic inputs of relatively fresh organic matter (phytodetritus) occur and that benthic processing of this material may be rapid. Although the responses of the total community in terms of oxygen consumption and of some individual benthic groups have been identified, the quantitative role of the different groups in the short-term response remains largely unknown. We examined the short-term response in major benthic compartments in anin situexperiment in the NE Atlantic (2170 m water depth) using13C-enriched diatoms as a tracer of labile carbon. Within 35 h, 6 mg C m–2was processed by the benthos, with the majority of the processed carbon recorded as respiration (45%). Among the fauna retained on a 300 μm sieve, Foraminifera were rapid consumers which, together with Bacteria, accounted for 50% of the processing. Therefore, although Bacteria dominate long-term carbon mineralization (as suggested by their general dominance in the benthic biomass), some faunal components, in this case Foraminifera, may play a central role in the rapid initial processing of fresh organic carbon in deep-sea sediments. 
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700 1 |a Duineveld, Gerard C. A.  |e verfasserin  |4 aut 
700 1 |a Pel, Roel  |e verfasserin  |4 aut 
700 1 |a Herman, Peter M. J.  |e verfasserin  |4 aut 
700 1 |a Heip, Carlo H. R.  |e verfasserin  |4 aut 
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