This is paper we analyze the diet and body condition factor (Mi) of three endemic species inside and outside an environmental protection area, to compare the effectiveness of the protection area in providing a greater spectrum of food items and greater environmental well-being to ichthyofauna. The study area comprised streams of the Ribeira do Iguape River basin, Campos Gerais National Park (CGNP), Paraná state and its surroundings. Eleven streams were sampled inside and outside, using electric fishing. A Permutational Multivariate Analysis of Variance to investigate the composition of food items and a Permutational Analysis of Multivariate Dispersions was used to investigate the variability between food items. The Scaled Mass Index (Mi) of the body condition was used to determine the relative condition factor of each individual of each species. Regarding the diet, there were no significant differences between inside and outside in the composition and variability of food items, this similarity may be associated with existing environmental degradation inside. However, the Mi was significant, and only one species presented greater well-being inside, because inside streams receive greater allochthonous intake of riparian vegetation, but, when it comes to the two species that perform the link of the aquatic food web with the terrestrial, the opposite occurred. These results indicate that the studied fragment, under anthropic pressures, is currently unable to conserve its biodiversity. The inside has no Management Plan, the manager must elaborate and implement it as a first step so that the situation can be reverted and the conservation effectiveness ensured in this highly threatened area, characterized by being one of the most important remnants of the Atlantic Forest, having relevant ecosystem services from a rare humid forest of Araucaria.
A presente pesquisa teve como objetivo analisar a possível ocorrência e influência do efeito de borda no Parque do Ingá – Maringá/PR. Buscou-se analisar se havia diferença da composição entre as áreas de borda e centro referente à área estudada. Os resultados evidenciaram menor abundância de macroinvertebrados na região da borda quando comparada ao centro. A região do centro apresentou maior umidade do solo e menor temperatura em relação à borda, assim, é sugerido um aquecimento da zona de borda por influência do meio externo, visto que ao redor do fragmento a composição é de pavimentação urbana. Houve maior diversidade na região central do parque, com a presença de organismos que indicam o estágio sucessional primário do solo em transição (direção borda-centro), devido ao efeito de borda recorrente. Concluiu-se que há uma diferença na diversidade beta das áreas abordadas e que o efeito de borda é influente no fragmento florestal, refletindo em uma baixa heterogeneidade que posteriormente pode afetar os serviços e funções do ecossistema, recomenda-se a revisão e prática do Plano de Manejo do Parque do Ingá, para que os problemas ocasionados pelo efeito de borda possam ser amenizados a tempo de não comprometer a conservação da fauna edáfica e fatores abióticos.
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