Ref ID : 6600
Qi Sang; Some ecological aspects of aquatic oligochaetes in the Lower Pearl River (People's Republic of China). Hydrobiologia 155:199-208, 1987
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Densities of the 8 most important species or genera of the 15 taxa found at a series of stations along the Guang-zhou Reach of the Pearl River are given. Shannon-Weaver diversity index values were low throughout the area studied. No clear correlations were found between oligochaetes and NH3-N, or a combination of 6 chemical factors (COD, NH3-N, NO3-N, Cr, Pb, Hg). However, when the main groups of the benthos, including the oligochaetes, were taken together, and a BPI (Biological Pollution Index) approach used, a correlation between the macroinvertebrate community and the combined chemical factors was noted.