Estudo da riqueza de coleópteros (Curculionidae) em unidades de conservação no estado de Mato Grosso

• Ano de defesa: 2025
• Autor(a) principal: Urnhani, Ana Claudia Troleis
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Ciências Naturais, Humanas e Sociais (ICNHS) – Sinop; UFMT CUS - Sinop; Programa de Pós-Graduação em Ciências Ambientais
• Palavras-chave em Português: Amazônia meridional; Biodiversidade; Coleobrocas; Conservação; CNPQ::OUTROS::CIENCIAS; Biodiversity; Conservation; Southern Amazon; Wood-boring beetles
• Link de acesso: http://ri.ufmt.br/handle/1/7297

Wood-boring beetles play a crucial role in wood degradation, participating in the cycling of its structural elements. By creating galleries in trees, they facilitate the transport of a symbiotic fungus that causes wood staining. Due to the ecological and economic importance of Scolytinae and Platypodinae (Coleoptera: Curculionidae), as well as the need for a better understanding of the biodiversity in northern Mato Grosso, particularly in the transition between the Cerrado and the Amazon, this study assessed the richness of these subfamilies in conservation areas. The study included the Rio Ronuro Ecological Station (EERR), Cristalino State Park (PEC), and Xingu State Park (PEX), contributing to the knowledge and conservation of these forest reserves. A total of 326 individuals were sampled across the three Conservation Units (CUs), representing 28 species and 14 genera (Chapter 1). The highest number was recorded in PEX (123 individuals; 37.7%), followed by EERR (109 individuals; 33.4%) and PEC (94 individuals; 28.8%). The most abundant species were Premnobius cavipennis (128 individuals), Hypothenemus eruditus (48 individuals), Xyleborus affinis (43 individuals), and Xyleborus spinulosus (22 individuals), all of which were present in every CU. The distribution of these beetles (presence and absence) was significantly influenced by proximity to open areas (p = 0.011) and water bodies (p = 0.022). The same trend was observed in relation to individual abundance, both for proximity to open areas (p = 0.007) and water bodies (p = 0.008), with a higher explanatory power for abundance (31%). Longitude and precipitation did not affect distribution. In the species survey conducted specifically in PEX (Chapter 2), 17 species were recorded across nine genera, with H. eruditus (34 individuals), P. cavipennis (33 individuals), X. affinis (14 individuals), and X. spinulosus (13 individuals) account for 75% of all captured individuals. Overall, this study contributed to the knowledge of wood-boring beetle species richness in these conservation areas, supporting the prospecting of species with potential economic interest for the forestry sector and bioindicator species for environmental quality. Additionally, it reinforced conservation efforts for these forest units in northern Mato Grosso, considering the strong environmental pressure from expanding agricultural and livestock frontiers, as well as mineral and forestry exploitation in the region.