Role of Bacteria in the Carbon and Nitrogen Flow between Water‐Column and Sediment in a Shallow Marine Bay (Bay of Piran, Northern Adriatic Sea)
- Author(s)
- G. J. Herndl, J. Faganeli, N. Fanuko, P. Peduzzi, V. Turk
- Abstract
Abstract. The interdependences between phytoplankton standing crop, bacterial biomass and the dissolved organic matter (DOM) pool in the water column were investigated and related to sediment parameters in a shallow marine bay (Bay of Piran, Northern Adriatic Sea) over an annual cycle. Bacterioplankton density varied between 1–10 × 105 cells ml‐1, with lowest density observed in March corresponding to the low Chi a concentrations during this period. Generation times as determined by dialysis incubations ranged between 4h (June) and 82 h (March). Mean bacterial secondary production rates during summer were about 40 mg C m‐1 d‐1 and 5mg C m‐3.d‐1 during winter. With a short time lag, DOM concentrations followed the fluctuation in Chi a. Sediment oxygen demand measurements revealed a mean mineralization rate of about 260 mg C m‐2 d‐1 during summer and 100–200 mg C m‐2 d‐1 in winter. Sediment bacterial density varied between 108 ‐ 109 cells g (sediment dry wt)‐1 in the top 5 cm sediment layer or, in terms of biomass, 4.3 g C m‐l during summer and 0.6 g C m‐2 during winter. Highest concentrations of DOM in pore waters were measured in September, coinciding with high rates of sediment oxygen demand.
- Organisation(s)
- Functional and Evolutionary Ecology
- External organisation(s)
- National Institute of Biology
- Journal
- Marine Ecology
- Volume
- 8
- Pages
- 221-236
- No. of pages
- 16
- ISSN
- 0173-9565
- DOI
- https://doi.org/10.1111/j.1439-0485.1987.tb00185.x
- Publication date
- 01-1987
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106022 Microbiology
- Keywords
- ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics, Aquatic Science, Ecology
- Sustainable Development Goals
- SDG 14 - Life Below Water
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/role-of-bacteria-in-the-carbon-and-nitrogen-flow-between-watercolumn-and-sediment-in-a-shallow-marine-bay-bay-of-piran-northern-adriatic-sea(6b62b7d7-126a-4202-949d-1c1a08069187).html