Publisher: Bachudo Science Co. Ltd

Microflora Population In Mangrove Sediments of Cross River Estuary

E. A. B. Edu, D. N. Omokaro, S. Holzloehner, O. Udensi
KEYWORDS: MICROFLORA POPULATION IN MANGROVE SEDIMENTS OF CROSS RIVER ESTUARY

ABSTRACT:

Microflora associated with the sediments of riverine mangrove forests dominated by Rhizophora, Avicennia and Nypa in Cross River (Nigeria) estuary were studied. The sediment samples ( 1.0g) collected monthly (February to October 2004) from swamps dominated by the three mangrove forest types were separately diluted serially with distilled water for microbial population estimation. Gram reactions were carried out for bacteria while wet mount with Lactophenol in cotton blue reagent was carried out for fungi. Microalgae count was carried out microscopy and counting on a counting chamber. The major microflora identified were algae belonging to the class Dtnophyceae, Baci/laiaophyceae, Rhodophyceae and Chlorophceae; fungi belonging to the class Ascomycetes and Deuteromycetes and bacteria belonging to the species of Bacillus. Flavobacterium, Clostridium. Proteus and Pseudomonas, respectively. The result obtained also showed significant difference (P < 0.01) in total microbial populations among the mangrove forest types studied with Avicennia ranking higher than Nypa and Rhizophora dominated forests. Significant (P < 0.05) seasonal variations in the microflora abundance in the three mangrove forest types were noticed with the dry season having higher microflora abundance than the rainy season. This suggests that the forest types probably influenced the.relative microbial popurat,on in the mangrove sediments


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