Nematodes as indicators of pollution: a case study from the Swartkops River system, South Africa
作者： T. K. Gyedu-Ababio , J. P. Furstenberg , D. Baird , A. Vanreusel
关键词: Pollution 、 Community structure 、 Species diversity 、 Diversity index 、 Population density 、 Estuary 、 Sediment 、 Chlorophyll a 、 Ecology 、 Biology
摘要: Nematodes from the sediments of Swartkops estuary in Port Elizabeth, South Africa were investigated at 10 selected sites along a salinity gradient subtidal region neap tide. The relation between nematode density, genera, community structure and environmental parameters including concentrations seven heavy metals, Mn, Ti, Cr, Pb, Fe, Sn Zn sediment investigated. was significantly influenced by chlorophyll concentration particle-size distribution. number genera had significant negative correlation with two Fe sediment. habitat preferences also assessed. A combination Shannon-Wiener Diversity Index (H') Maturity (MI) proved to be very useful assessing polluted or stressed sites. communities which are affected pollution, found under stress according diversity other indices used this study. At where relatively higher metal occurred, variation densities observed. Nematode differed (p < 0.05) those less no Monhystera spp. Theristus colonisers, thus indicator for
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