Importance of bacteria and protozooplankton for faecal pellet degradation

• Autorzy: Morata N. , Seuthe L.

Identyfikatory

DOI

10.5697/oc.56-3.565

• Języki publikacji: EN

Abstrakty

EN

The degradation mechanisms of faecal pellets are still poorly understood, although they determine their contribution to vertical fluxes of carbon. The aim of this study was to attempt to understand the microbial (bacteria and protozooplankton) degradation of faecal pellets by measuring the faecal pellet carbon-specific degradation rate (FP-CSD) as an indicator of pellet degradation. "In situ" and "culture" pellets (provided by the grazing of copepods in in situ water and in a culture of Rhodomonas sp. respectively) were incubated in seawater from the chlorophyll a maximum and 90 m depth, and in filtered seawater. When microbes were abundant (at the chlorophyll a maximum), they significantly increased FP-CSD. In addition, culture pellets had a higher FP-CSD than in situ pellets, suggesting that the results obtained with culture pellets should be treated with caution when trying to extrapolate to natural field conditions.

Słowa kluczowe

EN

carbon demand; carbon flux; respiration; faecal pellet; Calanus

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2014
• Tom: No. 56 (3)
• Strony: 565--581
• Opis fizyczny: Bibliogr. 70 poz., wykr.

Twórcy

autor

Morata N.

• Department of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, Norway
• Lemar CNRS UMR 6539, Rue Dumont D'Urville, 29280 Plouzané, France

autor

Seuthe L.

• Department of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, Norway

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