2026-04-142026-04-142026-03-06FARO, Cauan Ruan Lins. Diversidade de Trichoptera (Insecta) na volta grande do Rio Xingu, Pará: resultados de uma pesquisa participativa com povos tradicionais. Orientador: Fábio Batagini Quinteiro. 2026. 36 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/9458. Acesso em: .https://bdm.ufpa.br/handle/prefix/9458The Volta Grande do Xingu River, in Pará State, Brazil, represents one of the most unique lotic stretches in the Amazon Basin and has been subjected to significant hydrological alterations due to the implementation of the Belo Monte Hydroelectric Power Plant. Considering the importance of aquatic insects as bioindicators of environmental quality, this study aimed to inventory the diversity of Trichoptera larvae in the region, analyzing their taxonomic composition, functional structure, and spatial variation across different sampling sites. A participatory research approach was adopted, involving Indigenous and riverside communities in the sampling process, thereby integrating scientific knowledge with traditional ecological knowledge. Sampling was conducted in the municipalities of Altamira, Vitória do Xingu, Anapu, and Senador José Porfírio during the low-water seasons of 2023 and 2024, using manual collection on consolidated and non-consolidated substrates. Specimens were identified to the genus level, and community structure was evaluated using the Shannon-Wiener (H’) and Simpson (1-D) diversity indices. A total of 955 individuals were recorded, with a marked dominance of the family Hydropsychidae, particularly the genera Macrostemum, Synoestropsis, Leptonema, and Smicridea. Vitória do Xingu exhibited the highest relative abundance, whereas Senador José Porfírio presented the highest diversity indices, characterizing it as the biodiversity hotspot of the study. The functional composition revealed a predominance of collector-filterers, along with the presence of scrapers, shredders, and predators, indicating the maintenance of considerable trophic complexity. Although diversity indices suggest relative ecological stability, the low abundance of specialist and rare taxa may indicate ongoing biotic simplification associated with flow regime alterations. The results demonstrate that the Volta Grande do Xingu still sustains significant functional diversity of Trichoptera; however, continuous monitoring is essential to assess long-term impacts. The participatory approach proved to be an effective strategy for documenting Amazonian biodiversity and supporting conservation efforts in areas affected by large-scale hydroelectric development.Acesso AbertoTrichopteraBiodiversidade aquáticaVolta Grande do XinguMacroinvertebrados bentônicosHidrelétricasPesquisa participativaTrichopteraAquatic biodiversityBenthic macroinvertebratesHydroelectric damsParticipatory researchCNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::TAXONOMIA DOS GRUPOS RECENTESTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil