Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094

September 2013 Vol. 2(9): pp. 217-230

Copyright © 2015 Global Advanced Research Journals

 

Full Length Research Paper

Effects of Physico-Chemical Parameters on the Diversity and Abundance of Benthic Algae in an Agricultural Wetland in NDOP Plain, Cameroon

Fonge, B.A.1*; Tening, A.S.2; Achu, R.M.3 and Yinda G.S.3

 

1Department of Botany and Plant Physiology, University of Buea, P.O. Box 63, Buea, Cameroon

2Department of Chemistry, University of Buea, P.O. Box 63, Buea, Cameroon

3Department of Environmental Science, University of Buea, P.O. Box 63, Buea, Cameroon

*Corresponding Author’s:  Email: ambofonge@yahoo.com

Accepted 06 September, 2013

 

Abstract

Benthic algae are valuable tools in bio-monitoring pollution in wetland soils and water.  The effects of physico-chemical parameters on the diversity and abundance of benthic algae were studied.  Soil and water samples were collected from paddy fields following age gradient (34, 32, 22 and 5 years old). Physico-chemical properties and benthic algae diversity and abundance were analysed using standard methods.  All the soils had pH values within the acidic range. Exchangeable potassium decreased with age of the paddy fields. Available phosphorus, pH, OM, and C/N ratio contributed to diversity and abundance of benthic algae. No significant (P > 0.05) relationship was observed between benthic diversity, total N and available phosphorus. Water from the five year old paddy field site was the most acidic. Potassium, Na+, pH and salinity contributed positively to benthic diversity.  Species richness and salinity were significantly correlated (r= 0.986, P ≤ 0.05). Fifty three species were identified in 17 Families. Nitzschiaceae was the most abundant family and Anacystis sp. the most frequent species The most common species were MicrocystisChlorococcus dispersus, and Nitzschia sigmoidea. These may be used as bioindicators of pollution.  The older fields had more eutrophic species while the younger ones had more oligotrophic species.

Keywords: Benthic algae, soil, water, diversity, physico-chemical parameters, pollution, wetland.

 


 

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