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Short-term variations of seston characteristics in a shallow tropical lagoon : effect of wind-induced resuspension
- Publication Year :
- 1994
-
Abstract
- In January 1993, a 24 hour survey based on an hourly sampling was conducted in a station (1 m depth) located in the Ebrie lagoon, Cote d'lvoire, in order to determine short-term changes in seston quality and quantity and relate them to physical conditions. Water samples were collected just below the surface and at 0.9m depth to assess the seston distribution in the water column. Located in an estuarine environment, the study site was submitted to periodic effect of tides with low currents. Under certain conditions, sediment resuspension by wind-induced waves was observed in the shallow parts of this ecosystem. From the analysis of hydrodynamic processes (tide, wind and sedimentation rates), four basic situations were distinguished in the course of the study: a period with no wind and high sedimentation rates, a period characterized by wind-induced resuspension, followed by a period of sedimentation and finallly, a period without wind during the second flood tide. The particle size spectra were similar throughout the study, the distributions being unimodal (mode of 4 μm diameter). The finer particles (
- Subjects :
- geography
geography.geographical_feature_category
PHYTOPLANCTON
Ecology
Seston
Sediment
Pelagic zone
Estuary
MATIERE EN SUSPENSION
BACTERIE
Aquatic Science
Sedimentation
Wind speed
Oceanography
Water column
Phytoplankton
RELATION ESPECE ENVIRONNEMENT
Environmental science
ANALYSE QUALITATIVE
CILIE
ANALYSE QUANTITATIVE
General Agricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics
LAGUNE
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....902af1e48c1ac212be61f200a2dab88f