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- Publisher
- Springer Journals
- Copyright
- Copyright © 1994 by Springer-Verlag
- Subject
- Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
- ISSN
- 0025-3162
- eISSN
- 1432-1793
- DOI
- 10.1007/BF00354310
- Publisher site
- See Article on Publisher Site
Abstract
227 119 119 4 4 R. Danovaro M. Fabiano M. Boyer Istituto d Scienze Ambientali Marine Università di Genova S. Margherita L., Corso Rainusso 14 CP 79 I-16038 Genova Italy Dipartmento di Biologia Animale ed Ecologia Università di Cagliari Viale Poetto 1 Cagliari Italy Abstract Variations in number and biomass of benthic bacteria were examined in the surface sediments of a Mediterranean seagrass bed ( Posidonia oceanica (L.) Delile) in the Gulf of Marconi (northwestern Mediterranean Sea) from 1990 to 1991. The annual dynamics of benthic bacterial density and biomass were compared to changes in elemental (organic C and total N) and biochemical (lipids, proteins, carbohydrates) composition of sediment organic matter, as well as to microphytobenthic biomass, dissolved inorganic nutrients and ATP. Bacterial densities exhibited marked seasonal variations (5.12 to 322.7x10 8 cells g -1 sediment dry wt) with highest values in late spring. Bacterial standing stocks (15.8 to 882.33 μg C g -1 of sediment dry wt) were high. Bacterial biomass did not correlate with organic C, total N or to specific biochemical components, but correlated significantly with chlorophyll a , ATP and porewater phosphate concentrations. There is evidence that benthic bacteria were responding to variations of algal biomass. Bacterial biomass accounted, on average, for 30% of total living carbon (calculated on the basis of the ATP concentrations) and 8.4% of total organic carbon.
Journal
Marine Biology – Springer Journals
Published: Jul 1, 1994