Bacterial uptake of DOM released from P-limited phytoplankton

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

Puddu_FEMS_2003.pdf - Published Version

Download (402kB) | Preview
Official URL:


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

Actions (login required)

View Item View Item