Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin
14 pages, 10 figures
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Oxford University Press
2009-09
|
| Online Access: | http://hdl.handle.net/10261/19219 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
dig-icm-es-10261-19219 |
|---|---|
| record_format |
koha |
| spelling |
dig-icm-es-10261-192192020-11-19T08:42:05Z Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin Stenuite, Stephane Tarbe, Anne-Laure Sarmento, Hugo Unrein, Fernando Pirlot, Samuel Sinyinza, Danny Thill, Sophie Lecomte, Mélanie Leporcq, Bruno Gasol, Josep M. Descy, Jean-Pierre 14 pages, 10 figures Photosynthetic picoplankton (PPP), particularly picocyanobacteria (PCya), are known to be a major component of phytoplankton in oligotrophic waters. We investigated the dynamics of PPP and heterotrophic bacteria (HBact) in Lake Tanganyika during the dry and rainy seasons of 2004 to 2007, in the two basins of this large lake. Flow cytometry analyses showed that PPP was mainly composed by PCya of the phycoerythrin-rich Synechococcus type, with maximal abundances (2.3 x 104–8.2 x 105 cells mL–1) found in the mixolimnion (10–20 m depth). PPP biomass integrated over the water column depth ranged between 0.41 and 3.09 g C m–2, with maximal values in the south basin during the dry season (2.28 ± 0.62 g C m–2 on average). The contribution of PPP to total phytoplankton biomass ranged from 41 to 99%, with highest values in the south basin in the dry season. Cellular measurements by image analysis of epifluorescence microscopy images showed a significant increase of the cell volume of the PCya during this period. Flow cytometry also allowed enumeration of photosynthetic picoeukaryotes. Assuming a conversion factor of 530 fg C cell–1, they contributed on average to 6% to PPP biomass, except during the dry season in the south basin, where their contribution increased to up to 20% of PPP biomass. Integrated over a 100-m water column depth, PCya biomass was on average 1.4 times higher than HBact biomass. This study establishes reference values for the biomass contribution of this part of the microbial food web, covering for the first time, spatial (different sites), vertical (profiles at different depths) and seasonal variations on a multi-year basis. The results strengthen the view of a major role of PPP in the pelagic food web of large tropical Lake Tanganyika. This study was supported by the Fonds pour la Recherche Scientifique through the FRIA PhD scholarship to S.S., FNRS PhD scholarship to A.-L.T. and FNRS Postdoctoral scholarship to F.U. F.U. and J.M.G. were partially supported by Spanish grant PICOTANGA (CGL2005-24219-E). Peer reviewed 2009-12-01T13:30:02Z 2009-12-01T13:30:02Z 2009-09 artículo http://purl.org/coar/resource_type/c_6501 Journal of Plankton Research 31(12): 1531-1544 (2009) 0142-7873 http://hdl.handle.net/10261/19219 10.1093/plankt/fbp090 1464-3774 en https://doi.org/10.1093/plankt/fbp090 none 8985 bytes application/pdf Oxford University Press |
| institution |
ICM ES |
| collection |
DSpace |
| country |
España |
| countrycode |
ES |
| component |
Bibliográfico |
| access |
En linea |
| databasecode |
dig-icm-es |
| tag |
biblioteca |
| region |
Europa del Sur |
| libraryname |
Biblioteca del ICM España |
| language |
English |
| description |
14 pages, 10 figures |
| format |
artículo |
| author |
Stenuite, Stephane Tarbe, Anne-Laure Sarmento, Hugo Unrein, Fernando Pirlot, Samuel Sinyinza, Danny Thill, Sophie Lecomte, Mélanie Leporcq, Bruno Gasol, Josep M. Descy, Jean-Pierre |
| spellingShingle |
Stenuite, Stephane Tarbe, Anne-Laure Sarmento, Hugo Unrein, Fernando Pirlot, Samuel Sinyinza, Danny Thill, Sophie Lecomte, Mélanie Leporcq, Bruno Gasol, Josep M. Descy, Jean-Pierre Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| author_facet |
Stenuite, Stephane Tarbe, Anne-Laure Sarmento, Hugo Unrein, Fernando Pirlot, Samuel Sinyinza, Danny Thill, Sophie Lecomte, Mélanie Leporcq, Bruno Gasol, Josep M. Descy, Jean-Pierre |
| author_sort |
Stenuite, Stephane |
| title |
Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| title_short |
Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| title_full |
Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| title_fullStr |
Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| title_full_unstemmed |
Photosynthetic picoplankton in Lake Tanganyika: biomass distribution patterns with depth, season and basin |
| title_sort |
photosynthetic picoplankton in lake tanganyika: biomass distribution patterns with depth, season and basin |
| publisher |
Oxford University Press |
| publishDate |
2009-09 |
| url |
http://hdl.handle.net/10261/19219 |
| work_keys_str_mv |
AT stenuitestephane photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT tarbeannelaure photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT sarmentohugo photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT unreinfernando photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT pirlotsamuel photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT sinyinzadanny photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT thillsophie photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT lecomtemelanie photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT leporcqbruno photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT gasoljosepm photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin AT descyjeanpierre photosyntheticpicoplanktoninlaketanganyikabiomassdistributionpatternswithdepthseasonandbasin |
| _version_ |
1777665704802123776 |