Journal Article
Seasonal microbial food web dynamics in contrasting Southern Ocean productivity regimes
Urania Christaki; Audrey Gueneugues; Yan Liu; Stéphane Blain; Philippe Catala; Jonathan Colombet; Pavla Debeljak; Ludwig Jardillier; Solène Irion; Fred Planchon; Ingrid Sassenhagen; Telesphore Sime‐Ngando; Ingrid Obernosterer
Limnology and Oceanography · Vol. 66, Issue 1 · pp. 108-122 · 2021
Abstract
Spatial and seasonal dynamics of microbial loop fluxes were investigated in contrasting productivity regimes in the Indian sector of the Southern Ocean. Observations carried out in late summer (February–March 2018; project MOBYDICK) revealed higher microbial biomasses and fluxes in the naturally iron‐fertilized surface waters of Kerguelen island in comparison to surrounding off‐plateau waters. Differences were most pronounced for bacterial heterotrophic production (2.3‐fold), the abundance of heterotrophic nanoflagellates (HNF; 2.7‐fold). Independent of site, grazing by HNF was the main loss process of bacterial production (80–100%), while virus‐induced mortality was low (
Bibliographic Information
| Journal | Limnology and Oceanography |
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| Publisher | Wiley |
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| Publication Date | 2021-01-01 |
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| Publication Year | 2021 |
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| Volume | 66 |
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| Issue | 1 |
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| Pages | 108-122 |
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| Document Type | Journal Article |
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| Print ISSN | 0024-3590 |
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| eISSN | 1939-5590 |
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| DOI | 10.1002/lno.11591 |
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| Subject | Aquatic Science |
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