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Spatio-temporal variation in density of microphytoplankton genera in two tropical coral reefs of Mauritius.
- Source :
- African Journal of Marine Science; 2014, Vol. 36 Issue 4, p423-438, 16p
- Publication Year :
- 2014
-
Abstract
- Spatial and temporal (seasonal and interannual) variation in microphytoplankton was investigated at two tropical coral reef sites off Mauritius (Belle Mare [BM] and Flic-en-Flac [FEF]), from 2010 to 2012. Each site was divided into three zones: coast, lagoon and reef. Microphytoplankton, nutrient and chlorophyllasamples were collected, and physico-chemical parameters were measuredin situ. A total of 56 microphytoplankton genera were identified (43 diatoms, 8 dinoflagellates and 5 cyanobacteria). Total microphytoplankton density exhibited spatial and temporal variation, being higher at BM and near the coast, and mostly high in summer. Nutrient concentrations were highest near the coast as a result of run-off events and anthropogenic inputs, especially during heavy rainfall, and this resulted in elevated total microphytoplankton density. There were no clear diversity patterns at the two sites or within the different zones. At both sites,Navicula, CocconeisandFragilariawere the dominant diatoms, andGymnodinium, AlexandriumandProtoperidiniumwere the dominant dinoflagellates. There was a shift in dominance fromNaviculain summer toFragilariain winter. This seasonal shift may reflect how these species respond differently to environmental change, which could have implications for primary production at spatial and temporal scales. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1814232X
- Volume :
- 36
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- African Journal of Marine Science
- Publication Type :
- Academic Journal
- Accession number :
- 100099774
- Full Text :
- https://doi.org/10.2989/1814232X.2014.973445