| biodiversity assessment of benthic macroinvertebrates along a reservoir cascade in the lower são francisco river (northeastern brazil). | in order to verify the cascade-system effect in benthic macroinvertebrate communities, and the implications for policy making and proposals for conservation and sustainable use of the lower portion of são francisco river basin (bahia state, brazil), a three-reservoir cascade system including two stretches downstream were studied during dry (june, 1997) and rainy (march, 1998) periods. the dominant groups found were mollusca (melanoides tuberculata), oligochaeta, and chironomidae larvae. low shan ... | 2005 | 16097725 |