Microbial Characterization of Mangrove and Rainforest Soils, and Cowpea (Vigna Unguiculata L. Walp) Cultivation in Rivers State, Nigeria
Abstract
Different groups of microorganisms are present in rainforest and mangrove vegetation soil types, but not much is known about their population and diversity, hence, this research was conducted to evaluate and compare seasonal variations in microbial population, and diversity in two vegetation soil types in Port Harcourt, Rivers State, Nigeria. Samples of top soil (0-15cm) and subsoil (15-30cm) were collected during the dry and rainy seasons, and subjected to standard analysis. Cowpea was also cultivated in the different soils and microbial population before and after cultivation were also investigated. Results showed that microbial population was significantly (P ? 0.05) highest during the dry season for both mangrove and rainforest vegetation types than during the other seasons. Ranges of microbial populations were: total heterothrophic bacteria 7.8-25.0 x105cfu/g and 6.6-22.1 x105cfu/g; total heterotrophic fungi 2.0-5.4 x103cfu/g and 0.3-0.9 x 103 cfu/g; Actinomycetes 0.2-3.7x103cfu/g and 0.2-0.9x103cfu/g; Nitrifying bacteria 0.2-6.9 x102 cfu/g and 0.2-5.0x102cfu/g; Nitrogen fixing bacteria (0.2-1.3x102cfu/g and 0.2-1.5x102cfu/g) for rainforest and mangrove soils respectively. A total of 33 bacteria, 2 actinomycetes and 15 fungi species were isolated and identified from the two vegetation types across all seasons. Bacillus sp was the most predominant bacterium present, while Aspergillus was the most predominant fungus in both vegetation types and during all seasons. Microbial population increased in the different soils after the cultivation of cowpea and seasonal variations affected microbial diversity and populations.
Keywords
Vegetation, Soil, Characterization, Bacteria, Fungi
Citations
IRE Journals:
Nengi-Benwari, A.O. , Wemedo, S.A.
"Microbial Characterization of Mangrove and Rainforest Soils, and Cowpea (Vigna Unguiculata L. Walp) Cultivation in Rivers State, Nigeria" Iconic Research And Engineering Journals Volume 8 Issue 9 2025 Page 321-337
IEEE:
Nengi-Benwari, A.O. , Wemedo, S.A.
"Microbial Characterization of Mangrove and Rainforest Soils, and Cowpea (Vigna Unguiculata L. Walp) Cultivation in Rivers State, Nigeria" Iconic Research And Engineering Journals, 8(9)
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