The assumption that habitat degradation results in a substantial and predictable decrease in taxonomic diversity is an important aim of several methods of biological assessment based on fresh water organisms, especially on benthic invertebrates [12]. The decrease in taxonomic diversity due to habitat degradation could be measured as a reduced species richness (stressors not allowing less tolerant species to colonize or to run in degraded sites [13] or depletion in the values of any of numerous indices of diversity (stress eliminates sensitive taxes and consequences in a greater numerical dominance of those able to persist [14]). Moreover, diversity indices respond strongly and unpredictably when a taxonomic detail changes [14], so it can also make the search for general ecological determinants of stream taxonomic diversity not-doable. Thither are many sharp or subtle differences in response of each higher taxon of stream macrobenthos to important environmental components. This variety of differences between higher taxes in taxonomic diversity has been shown in numerous fields. The diversity of Odonata seems to be strongly correlated with the local climatic specifics [15]; moreover, it is more sensitive than the diversity of other taxonomic groups to the social system of riparian vegetation [16]. The profusion of four insect orders studied by Rosemond et al. (1992) was affected in different ways by chemical parameters of stream waters [17]. Moreover, the kinship between the benthic community structure and environmental variables has been the topic of numerous investigations [18, 19, 20, 21, and 22]. Poff and Ward [23] identified stream flow variability as a major factor affecting other abiotic and biotic elements that regulate lotic macrobenthic patterns. In this work, the researcher evaluated diversity of the chosen groups of macrobenthos, analyzed their relationships with environmental components and also compared the reaction of different groups to environmental variables.