Ceesay, Adam, Wolff, Matthias, Koné, Tidiani, Njie, Ebrima and Birkicht, Matthias (2016) Seasonal changes in water quality and fisheries of Tanbi Wetland National Park. Regional Studies in Marine Science, 8 (1). pp. 170-182. DOI https://doi.org/10.1016/j.rsma.2016.04.006.

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Abstract

This research was aimed at studying seasonal changes in water quality of Tanbi Wetland National Park (TWNP) and how these interact with the different land use types to influence fish assemblage. Physicochemical properties were measured in situ with a portable YSI multiprobe watermeter and fish sampling was done using a seine net of 100×4 m. To assess nutrient (nitrogen and phosphorus) input and chlorophyll a concentration (chl-a) in TWNP, spectrophotometry (fluorescence method) was applied. Subjecting the main water variables to a Principal Components Analysis (PCA) indicated a strong correlation between water temperature and pH, phosphate and pH, as well as water temperature and phosphate. A further Multidimensional Scaling (MDS) of the environmental variables indicated salinity as the main water variable influencing fish species richness in TWNP. Except at the settlement and agricultural zones, changes in fish assemblage appear not to be influenced by the specific land use types. As judged from a three-decade time series of rainfall and atmospheric temperatures, seasonal variations in environmental conditions have intensified and are negatively influencing fish assemblage in TWNP.

Document Type: Article
Programme Area: UNSPECIFIED
Research affiliation: Affiliations > Not ZMT
Infrastructure > Chemistry Laboratory
Theoretical Ecology and Modelling > Resource Management
Refereed: Yes
Open Access Journal?: No
DOI etc.: https://doi.org/10.1016/j.rsma.2016.04.006
ISSN: 23524855
Date Deposited: 08 Jul 2019 13:55
Last Modified: 01 Oct 2020 12:59
URI: http://cris.leibniz-zmt.de/id/eprint/2270

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