Bacterial utilization of different DOC size classes and demand for inorganic nutrients in the Northern Adriatic Sea

Authors
Zoppini, A Bacci, C Fazi, S Pettine, M Tandoi, V
Citation
A. Zoppini et al., Bacterial utilization of different DOC size classes and demand for inorganic nutrients in the Northern Adriatic Sea, FR ENV BULL, 7(1A-2A), 1998, pp. 42-50
Citations number
23
Categorie Soggetti
Environment/Ecology
Journal title
FRESENIUS ENVIRONMENTAL BULLETIN
ISSN journal
10184619 → ACNP
Volume
7
Issue
1A-2A
Year of publication
1998
Pages
42 - 50
Database
ISI
SICI code
1018-4619(199811/12)7:1A-2A<42:BUODDS>2.0.ZU;2-B
Abstract
Bacterial utilization of different molecular sizes of dissolved organic car bon (DOC) was investigated in the northern Adriatic sea. DOC classes were s eparated using a cascade ultrafiltration system (10 and 1 kDa molecular wei ght cutoff). The lowest bacterial growth efficiency and DOC utilization rat e were in all experiments observed in the 1-10 kDa fraction. Based on these results the above fraction seems to cycle slower compared to other fractio ns. Nutrient addition (P+N) to bacterial cultures increased DOC utilization rates suggesting a nutritional limitation of the substrate.