The occurrence of cyanobacteria blooms in freshwater ecosystems and their link with hydro-meteorological and environmental variations in Tanzania
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Date
2019-03
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
Cyanobacteria (blue-green algae) are photosynthetic bacteria that under favorable
environmental conditions produce secondary metabolites (cyanotoxins) which are
harmful to the environment, including humans. The mass proliferation of harmful
cyanobacteria is termed CyanoHABs. CyanoHABs can adapt to different climatic
fluctuations, therefore, understanding their dynamics in freshwater systems is
crucial. Variation in climatic and hydrological processes, changing land use and
economic growth all influence the occurrence and distribution of CyanoHABs.
There have been inadequate CyanoHAB studies at local scales, therefore their occurrence and dynamics cannot be generalized. This study reviews and synthesizes
cases of CysnoHAB occurrence, magnitude, and timing and how these are linked
with climatic and hydrological variations in the United Republic of Tanzania. In
this study, a scoping review approach was adopted. Research articles, reports, and
databases were consulted. The most common species of toxin-producing
cyanobacteria were identified in different water bodies in Tanzania, as well as the
record of mass fatality of birds (Lesser Flamingo) in Lake Manyara, which in
almost all cases occurred during dry years. While previous studies on CyanoHAB
dynamics and their links to climate, hydrological, and environmental changes
have not been undertaken in Tanzania, there are studies in Lake Victoria and
Tanganyika. Therefore, there should be an immediate response from water users,
managers, researchers, and water authorities to address and actively engage in
monitoring and managing the risks associated with CyanoHABs in Tanzania.
Description
Journal Article
Keywords
Environmental science, Hydrology, Atmospheric science