Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika)
12 pages, 6 figures
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| Format: | artículo biblioteca |
| Language: | English |
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Wiley-Blackwell
2009-06
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| Subjects: | Bacterial biomass, Bacterial production, Microbial food web, Large tropical lake, Lake Tanganyika, |
| Online Access: | http://hdl.handle.net/10261/19221 |
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dig-icm-es-10261-192212020-11-19T08:33:28Z Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) Stenuite, Stephane Pirlot, Samuel Tarbe, Anne-Laure Sarmento, Hugo Lecomte, Mélanie Thill, Sophie Leporcq, Bruno Sinyinza, Danny Descy, Jean-Pierre Servais, Pierre Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika 12 pages, 6 figures 1. Abundance and bacterial production (BP) of heterotrophic bacteria (HBact) were measured in the north and south basins of Lake Tanganyika, East Africa, during seasonal sampling series between 2002 and 2007. The major objective of the study was to assess whether BP can supplement phytoplankton particulate primary production (particulate PP) in the pelagic waters, and whether BP and particulate PP are related in this large lake. HBact were enumerated in the 0–100 m surface layer by epifluorescence microscopy and flow cytometry; BP was quantified using 3H-thymidine incorporation, usually in three mixolimnion layers (0–40, 40–60 and 60–100 m). 2. Flow cytometry allowed three subpopulations to be distinguished: low nucleic acid content bacteria (LNA), high nucleic acid content bacteria (HNA) and Synechococcus-like picocyanobacteria (PCya). The proportion of HNA was on average 67% of total bacterial abundance, and tended to increase with depth. HBact abundance was between 1.2 × 105 and 4.8 × 106 cells mL−1, and was maximal in the 0–40 m layer (i.e. roughly, the euphotic layer). Using a single conversion factor of 15 fg C cell−1, estimated from biovolume measurements, average HBact biomass (integrated over a 100-m water column depth) was 1.89 ± 1.05 g C m−2. 3. Significant differences in BP appeared between seasons, especially in the south basin. The range of BP integrated over the 0–100 m layer was 93–735 mg C m−2 day−1, and overlapped with the range of particulate PP (150–1687 mg C m−2 day−1) measured in the same period of time at the same sites. 4. Depth-integrated BP was significantly correlated to particulate PP and chlorophyll-a, and BP in the euphotic layer was on average 25% of PP. 5. These results suggest that HBact contribute substantially to the particulate organic carbon available to consumers in Lake Tanganyika, and that BP may be sustained by phytoplankton-derived organic carbon in the pelagic waters This study was supported by the Fonds pour la Recherche Scientifique through the FRIA PhD scholarships to S. Stenuite and S. Pirlot and FNRS PhD scholarship to A.-L. Tarbe Peer reviewed 2009-12-01T13:40:50Z 2009-12-01T13:40:50Z 2009-06 artículo http://purl.org/coar/resource_type/c_6501 Freshwater Biology 54(6): 1300-1311 (2009) 0046-5070 http://hdl.handle.net/10261/19221 10.1111/j.1365-2427.2009.02177.x en https://doi.org/10.1111/j.1365-2427.2009.02177.x none 8985 bytes application/pdf Wiley-Blackwell |
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Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika |
| spellingShingle |
Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika Stenuite, Stephane Pirlot, Samuel Tarbe, Anne-Laure Sarmento, Hugo Lecomte, Mélanie Thill, Sophie Leporcq, Bruno Sinyinza, Danny Descy, Jean-Pierre Servais, Pierre Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| description |
12 pages, 6 figures |
| format |
artículo |
| topic_facet |
Bacterial biomass Bacterial production Microbial food web Large tropical lake Lake Tanganyika |
| author |
Stenuite, Stephane Pirlot, Samuel Tarbe, Anne-Laure Sarmento, Hugo Lecomte, Mélanie Thill, Sophie Leporcq, Bruno Sinyinza, Danny Descy, Jean-Pierre Servais, Pierre |
| author_facet |
Stenuite, Stephane Pirlot, Samuel Tarbe, Anne-Laure Sarmento, Hugo Lecomte, Mélanie Thill, Sophie Leporcq, Bruno Sinyinza, Danny Descy, Jean-Pierre Servais, Pierre |
| author_sort |
Stenuite, Stephane |
| title |
Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| title_short |
Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| title_full |
Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| title_fullStr |
Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| title_full_unstemmed |
Abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (Lake Tanganyika) |
| title_sort |
abundance and production of bacteria, and relationship to phytoplankton production, in a large tropical lake (lake tanganyika) |
| publisher |
Wiley-Blackwell |
| publishDate |
2009-06 |
| url |
http://hdl.handle.net/10261/19221 |
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| _version_ |
1777665704962555904 |