Impact of Hypoxia on the Community Structure of Benthic Macroinvertebrates of Lagos Lagoon, Nigeria

Journal of Applied Sciences and Environmental Management

NKWOJI, JOSEPH AHAMEFULA¹ 

关键词: Hypoxia;    benthic;    lagoon;    diversity;    macroinvertebrates;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

Study of the Lagos lagoon was conducted for two years to investigate the impactof hypoxia on the benthic macroinvertebrates. Water and benthic samples were collectedmonthly along the study stretch and analysed in a standard laboratory. Temporal variation inwater physico-chemistry was largely controlled by rainfall pattern while the spatial variationwas influenced by proximity to the Harbour as well as the pollution sources and types. A total of3,159 individuals comprising three phyla, five classes, nineteen families and twenty threespecies were recorded. Iddo I, Iddo II, Ogudu and Agboyi study stations recorded very lowindividuals, but relatively high number of polychaetes. Benthic macro- invertebrate communitywas dominated by the molluscs. Margalef’s index of species richness ranged from 0.79 to 2.57while Shannon-Wiener index ranged from 0.40 to 2.19. Species evenness index ranged from0.29 to 0.80. There was generally low biodiversity indicating the stressed nature of the studyarea.

【 授权许可】

Unknown