Puddu, Alberto and Zoppini, Annamaria and Fazi, Stefano and Rosati, Michela and Amalfitano, Stefano and Magaletti, Erika (2003) Bacterial uptake of DOM released from P-limited phytoplankton. FEMS Microbiology Ecology, 46 (3). pp. 257-268. ISSN 1574-6941
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Abstract
The growth and the structure of a coastal bacterioplankton community were monitored in short-term bottle experiments in order to investigate the bacterial uptake of extracellular organic carbon released by the diatom Cylindrotheca closterium grown under P-balanced and P-depleted conditions. Bacterial specific growth rates and carbon demand were significantly lower in the exudates from P-depleted algae (24% and 30% reduction, respectively). The origin of the extracellular carbon appeared also to affect the taxonomic composition of the bacterioplankton assemblage, mainly reducing the development of Q-Proteobacteria. This pattern of bacterial carbon uptake could contribute to a longer persistence of the exudates released in P-depleted conditions affecting the dynamics of the carbon cycle in marine environments.
| Item Type: | Article |
|---|---|
| Additional Information: | cited By 42 |
| Uncontrolled Keywords: | Carbon cycle; Algal excretion; Cylindrotheca closterium; Bacterial activity; Phylogenetic diversity; Flow cytometry |
| Subjects: | 500 Scienze naturali e Matematica > 570 Scienze della vita; Biologia > 577 Ecologia 500 Scienze naturali e Matematica > 570 Scienze della vita; Biologia > 579 Microrganismi, funghi, alghe. Classificare qui la Microbiologia, i Protista, le protofite, le Thallobionta (Thallophyta); la Storia naturale e la Biologia descrittiva di microrganismi, funghi, alghe; le opere interdisciplinari su microrganismi, funghi |
| Depositing User: | Dr. Stefano Amalfitano |
| Date Deposited: | 21 Dec 2016 13:12 |
| Last Modified: | 21 Dec 2016 13:12 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15402 |
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