Análise do uso e ocupação do solo da Bacia do Ribeirão Cambé (Londrina-Pr) e sua relação com a estrutura da assembleia de peixes

Abstract

Understanding the capacity of a city impact the environment is essential, as it allows to understand how human activities destructured ecosystems and how these changes directly and indirectly affect the health of the population. The impact generated on aquatic environments, besides affecting the water chemistry and aquatic biota, affecting the population that uses water for recreational and leisure practices as well for their own consumption. This study was conducted on Cambé stream basin, an affluent of Tibagi river, urban area of Londrina, Paraná. The main objective was to analyze the different uses and land cover of the basin, along with the limnological parameters and evaluate how they influence the structures of fish assemblages patterns. In the upper part of the basin quarterly samplings were carried out from March to December 2013 and two quarterly samplings throughout the basin during from December 2013 to March 2014. Were found 14 species, and the most representative were P. reticulata, H. ancistroides and P. aff caudimaculatus. Sections 2 and 5 showed greater diversity and equitability, and point 2 showed greater richness (S = 9), thus presenting better environmental conditions. With respect to landscape elements can notice a pattern of increased of dense vegetation class along with increased agriculture / field class. Furthermore, the landscape variables proved strongly correlated with the structure of assemblies of fish patterns revealing that the more unprotected landscape surrounding the water body, the greater the impact on him, affecting aquatic biota.