2026-03-312026-03-312026-02-25SALES, Dayane Cunha. Comparação de dois índices de habitat ripário em relação à fauna de macroinvertebrados em riachos da Amazônia Oriental (Pará – Brasil). Orientador: Colin Robert Beasley. 2026. 42 f. Trabalho de Curso (Licenciatura em Ciências Biológicas) – Faculdade de Ciências Biológicas. Instituto de Estudos Costeiros, Campus Universitário de Bragança, Universidade Federal do Pará, Bragança-PA, 2026. Disponível em: https://bdm.ufpa.br/handle/prefix/9418. Acesso em: .https://bdm.ufpa.br/handle/prefix/9418The conservation and preservation of low-order streams in Eastern Amazonia are crucial for maintaining biodiversity; however, the selection of effective monitoring metrics still presents gaps in the environmental management of these resources. This study evaluated two riparian habitat indices that estimate the environmental integrity of streams: the Habitat Integrity Index (HII) and the Riparian Habitat Diversity Index (RHDI). Both were applied to first-order streams in Bragança, Pará State, Brazil, comparing the effectiveness of rapid assessment protocols. The methodology consisted of applying the indices and collecting physicochemical and microhabitat data at eight sampling sites to analyze the relationship between these indices, water physicochemical variables, and the structure of the benthic macroinvertebrate assemblage during the regional dry season. The results indicated that although both indices classified the sites as preserved (HII) and natural (RHDI), HII demonstrated greater sensitivity to ecological and geomorphological variations, whereas RHDI showed a more generalized response. In the biological analysis, the contrast was evident: only HII was related with the fauna, revealing that the abundance of families such as Chironomidae decreases in areas with higher integrity, suggesting that moderate disturbances favor resistant taxa. Furthermore, the study showed that the indices, which are visual, may mask chemical impacts, such as the disposal of cassava-processing waste, which appears to have reduced the biota even in sites with high habitat index values. It is concluded that HII is the more robust index for the region; however, effective management of Amazonian ecosystem health requires the integration of habitat assessment protocols, physicochemical analyses, and biological monitoring.Acesso AbertoBioindicadoresAmazonia OrientalIntegridade de habitatÍndices ambientaisMonitoramento ambientalBioindicatorsEastern AmazonHabitat integrityEnvironmental indicesEnvironmental monitoringCNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA::ECOLOGIA APLICADATrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil