Abstract
The distribution of temperature, salinity, visibility and dissolved oxygen was sampled from 1996 to 2002 at sites along the Seronera River. The minimum temperature decreased with distance upstream. The salinity increased up-river where occasionally hypersaline conditions prevailed. Dissolved oxygen was highly variable spatially and temporally, depending on both the level of eutrophication by animal dung and the presence of wetlands that help filter the excess nutrients. During the study period, fringing, freshwater wetlands have generally been degraded and in some cases destroyed, and this has been accompanied by significantly decreased oxygen levels, sometimes nearing anoxic conditions. Also during this period, saltwater wetlands have increased, and since wildlife impacted these wetlands little, dissolved oxygen levels remained high throughout. Visibility was highest in areas fringed by wetlands.
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Gereta, E., Mwangomo, E. & Wolanski, E. The influence of wetlands in regulating water quality in the Seronera River, Serengeti National Park, Tanzania. Wetlands Ecol Manage 12, 301–307 (2004). https://doi.org/10.1007/s11273-005-0163-9
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DOI: https://doi.org/10.1007/s11273-005-0163-9