Macroinvertebrate communities associated with littoral zone habitats and the inﬂuence of environmental factors in Malilangwe Reservoir, Zimbabwe
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Macroinvertebrates, diversity, Malilangwe reservoir, macrophyte cover, conductivity, water level. The aim of our study was to investigate macroinvertebrate communities so as to understand factors and processes structuring macroinvertebrate communities in a small reservoir, Malilangwe reservoir over seven months (April to October). Sampling was performed by active sweep netting and searching soil sediments. Water temperature, conductivity, dissolved oxy- gen, pH, ammonia, nitrogen, phosphorus, chemical oxygen demand and macrophyte cover were determined. In total, forty-two macroinvertebrate families belonging to 10 orders were identiﬁed amongst 13 macrophyte species and sediments. Thiaridae and Physidae (Mollusca) were the dom- inant and most abundant taxa (57.71%) and there were followed by the Hemiptera (27.31%). High indices for sites 1 to 3 for the Simpsons in- dex, the Shannon-Weaver index and evenness were recorded, while low indices were observed for sites 4 to 5, with signiﬁcant differences be- ing observed among the study site using the Kruskal-Wallis ANOVA test (p < 0.05). Redundancy Analysis revealed that among environmental fac- tors, hydrologically linked parameters such as conductivity, water level and macrophyte cover had the strongest inﬂuence on macroinvertebrate distribution.
Additional Citation InformationDalu, T., Clegg, B., and Nhiwatiwa, T. (2012). Macroinvertebrate communities associated with littoral zone habitats and the inﬂuence of environmental factors in Malilangwe Reservoir, Zimbabwe. Knowledge and Management of Aquatic Ecosystems, 406 (06). DOI: 10.1051/kmae/2012023