Growth and grazing losses of prokaryotes in the central Atlantic Ocean
12 pages, 5 figures, 2 tables.-- Corrigendum published in J.Plankt.Res. 28(9):879(2006); doi:10.1093/plankt/fbl026
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2005-09-30
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dig-icm-es-10261-157992020-11-10T09:58:41Z Growth and grazing losses of prokaryotes in the central Atlantic Ocean Vázquez-Domínguez, Evaristo Gasol, Josep M. Agustí, Susana Duarte, Carlos M. Vaqué, Dolors 12 pages, 5 figures, 2 tables.-- Corrigendum published in J.Plankt.Res. 28(9):879(2006); doi:10.1093/plankt/fbl026 The trophic relation between prokaryotes and heterotrophic nanoflagellates was studied during two latitudinal cruises in the central Atlantic Ocean. The losses to predation on prokaryotes were determined in 12 locations covering a wide range of trophic situations, from ultraoligotrophic [<0.05 mg chlorophyll a (Chl a) m–3] to moderately eutrophic waters (>1 mg Chl a m–3). In these locations, the abundance of prokaryotes (P) covaries with that of heterotrophic nanoflagellates, thus suggesting that resources controlled the abundance of heterotrophic nanoflagellates (HNF). Besides, the losses to predation were positively related to prokaryotic and heterotrophic nanoflagellate biomass, which points toward higher consumption rates associated with larger concentrations of preys and predators. Conversely, declining trends between prokaryotic production (PP) and the fraction of this production lost to predation revealed higher relative losses in the environments with lower productions. Our study shows for the central Atlantic that 35% of prokaryotic biomass (BP), equating to between 40 and 83% of PP can be ingested daily and that 55% of the variability observed in the rate of prokaryotic loss to predation was related with the HNF. As predators graze on many prey types, in an oligotrophic system containing many prey species but little numeric loading, there will still be prey for predators but not enough hosts for viruses. In this sense, our study confirms the importance of the prey–predator relationship between prokaryotes and heterotrophic nanoflagellates in the flow of carbon of the less productive regions of the ocean This is a contribution of the ‘Latitud’ project (AMB94-0739, Spanish Education and Science Ministry). E.V.-D. was supported by grants FPI (PF3698574900, Spanish Education and Science Ministry), C-RED 2002–2003, Generalitat de Catalunya, and ‘Microflux’ project (CMT, 2004-04404-CO2-01) Peer reviewed 2009-08-06T15:12:12Z 2009-08-06T15:12:12Z 2005-09-30 artículo http://purl.org/coar/resource_type/c_6501 Journal of Plankton Research 27(10): 1055-1066 (2005) 0142-7873 http://hdl.handle.net/10261/15799 10.1093/plankt/fbi074 en https://doi.org/10.1093/plankt/fbi074 none 180710 bytes application/pdf Oxford University Press |
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12 pages, 5 figures, 2 tables.-- Corrigendum published in J.Plankt.Res. 28(9):879(2006); doi:10.1093/plankt/fbl026 |
| format |
artículo |
| author |
Vázquez-Domínguez, Evaristo Gasol, Josep M. Agustí, Susana Duarte, Carlos M. Vaqué, Dolors |
| spellingShingle |
Vázquez-Domínguez, Evaristo Gasol, Josep M. Agustí, Susana Duarte, Carlos M. Vaqué, Dolors Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| author_facet |
Vázquez-Domínguez, Evaristo Gasol, Josep M. Agustí, Susana Duarte, Carlos M. Vaqué, Dolors |
| author_sort |
Vázquez-Domínguez, Evaristo |
| title |
Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| title_short |
Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| title_full |
Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| title_fullStr |
Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| title_full_unstemmed |
Growth and grazing losses of prokaryotes in the central Atlantic Ocean |
| title_sort |
growth and grazing losses of prokaryotes in the central atlantic ocean |
| publisher |
Oxford University Press |
| publishDate |
2005-09-30 |
| url |
http://hdl.handle.net/10261/15799 |
| work_keys_str_mv |
AT vazquezdominguezevaristo growthandgrazinglossesofprokaryotesinthecentralatlanticocean AT gasoljosepm growthandgrazinglossesofprokaryotesinthecentralatlanticocean AT agustisusana growthandgrazinglossesofprokaryotesinthecentralatlanticocean AT duartecarlosm growthandgrazinglossesofprokaryotesinthecentralatlanticocean AT vaquedolors growthandgrazinglossesofprokaryotesinthecentralatlanticocean |
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1777665682450677760 |