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Sediment oxygen consumption and vertical flux of organic matter in the Seto Inland Sea, Japan
- Source :
-
Estuarine Coastal & Shelf Science . Feb2003, Vol. 56 Issue 2, p213. 8p. - Publication Year :
- 2003
-
Abstract
- Vertical flux of organic matter and rates of sediment oxygen consumption (SOC) were measured in summer 2000 at a muddy sediment site (21 m depth) in the Seto Inland Sea, Japan. During the 26-day experimental period (15 July to 9 August), a diatom bloom occurred, lasting for about a week. The vertical flux of organic carbon and chlorophyll a (FC and Fchl), measured at 12.5 m depth, showed a sharp peak following the development of the bloom. Under these conditions, SOC ranged from 1.4 to 3.0 mmol O2 m−2 h−1, and it was strongly influenced by the biomass of macrozoobenthos present in the experimental chambers used for SOC measurements. However, macrozoobenthic oxygen consumption made up only 5% of SOC. SOC variations were not coupled with corresponding changes in FC or Fchl. The effects of other factors, such as water temperature, as well as levels of sediment chlorophyll a and bacterial abundance, were minor, presumably because these parameters did not vary strongly during the study period. The average SOC value corrected for macrozoobenthos oxygen consumption (1.8 mmol O2 m−2 h−1) and converted into the decomposition rate of organic material was nearly balanced with the FC averaged over the experimental period (0.7 C m−2 day−1). This indicates that this muddy sediment area in the Seto Inland Sea plays an important role in the degradation of organic material supplied from the water column. [Copyright &y& Elsevier]
- Subjects :
- *SEDIMENTS
*PHYTOPLANKTON
Subjects
Details
- Language :
- English
- ISSN :
- 02727714
- Volume :
- 56
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Estuarine Coastal & Shelf Science
- Publication Type :
- Academic Journal
- Accession number :
- 9443598
- Full Text :
- https://doi.org/10.1016/S0272-7714(02)00158-0