CECAV
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1
Centro Nacional de Pesquisa e Conservação de Cavernas
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5 resultados
Resultados da Pesquisa
Item Conservation gaps for Brazilian bats, limited protection across conservation units and the importance of the indigenous lands(2024-10-05) Rodrigues, F.B.; Alexandre, R.J.R.; Pena, S.A; et al.In Brazil, there is 13% of the world’s bat diversity, is the second most diverse group of mammals, playing a crucial role in providing ecosystem services that benefit humans. However, anthropogenic disturbances exacerbate processes of species extinction, shifts in geographic distributions, and phenological changes, despite efforts to safeguard biodiversity through the creation of Conservation Units and Indigenous Lands. Moreover, gaps in taxonomic knowledge and challenges related to species distribution hinder the effective implementation of conservation strategies in protected areas. This study assesses the contribution of Brazilian Conservation Units (both Full Protection and Sustainable Use) and Indigenous Lands to the conservation of bat species and their ecosystem services. It also presents maps illustrating species richness by trophic guilds and threat classification according to IUCN, including species listed as Data Deficient. The findings reveal low percentages of potential bat distribution areas within these protected regions, especially for insectivorous, nectarivorous, and frugivorous bats in the Cerrado biome, which are classified as Near Threatened. Additionally, the highest bat species richness was observed in the Amazon and Atlantic Forest biomes.Item Proposal for a Geobiodiversity Index Applied to the Morphoclimatic Domain of Cerrado—Brazil(2021-06-30) Valdir Adilson SteinkeThe Morphoclimatic Domain of Cerrado is located in the Brazilian territory, and it is a central area of great importance for the ecological scenario of Brazil. This area has undergone strong anthropic pressure in the last 60 years, especially due to the expansion of agribusiness—a warning sign for the conservation of its natural resources. Studies on geodiversity and biodiversity have sought to contribute with data for maintaining the landscapes of this region. The objective of this proposal is the generation of a geobiodiversity index capable of indicating the most relevant areas of geological, geomorphological, and vegetation aspects to be preserved and conserved within existing legal instruments. The methodological procedures were centered on segmenting the area in 2.472 hexagonal cells, which were subjected to a spatial matrix analysis in GIS and geostatistical environments capable of articulating the various elements and generating an agglutinating index for each cell. The result indicates 276 areas with the highest index value, presenting, therefore, possible classified areas. This index is an attempt to draw attention to Cerrado and the importance of its conservation.Item Colonization of different biomes drove the diversification of the Neotropical Eidmanacris crickets (Insecta: Orthoptera: Grylloidea: Phalangopsidae)(2021-01-15) Denadai de Campos, Lucas; Guilherme Barrios de Souza-Dias, Pedro; Desutter-Grandcolas, Laure; Shigueo Nihei, SilvioThe phylogeny of the cricket genus Eidmanacris is used to analyse its historical distribution and diversification in three South American biomes: Atlantic Forest, Cerrado, and Chiquitano Dry Forest. A morphological phylogeny with all the 29 species of Eidmanacris and the Geographically explicit Event Model (GEM) is used to explain their colonization and diversification through three different biomes and their ancestral habitats and distributional areas. We analysed ecologically-significant characters, such as body size and metanotal characters, to test whether if morphology, habitat, or behaviour are connected. The relations of these features with the colonisation of wetter or drier biomes based on the distributional area, phylogeny and diversity of the genus were also tested. The results show that the ancestral distribution of the genus was the Atlantic Forest, and that biome occupancy, habitat, size, and mating behaviour evolved congruently through the phylogeny, drawing a coherent pattern of changes through Eidmanacris evolution toward the colonisation of drier biomes. Our results indicate that gallery forests could play a key role in the distribution and diversification of Eidmanacris species.- Colonization of different biomes drove the diversification of the Neotropical Eidmanacris crickets (Insecta: Orthoptera: Grylloidea: Phalangopsidae)(2021-01-15) Denadai de Campos, Lucas; Guilherme Barrios de Souza-Dia, Pedro; Desutter-Grandcolas, Laure; Shigueo Nihei, SilvioThe phylogeny of the cricket genus Eidmanacris is used to analyse its historical distribution and diversification in three South American biomes: Atlantic Forest, Cerrado, and Chiquitano Dry Forest. A morphological phylogeny with all the 29 species of Eidmanacris and the Geographically explicit Event Model (GEM) is used to explain their colonization and diversification through three different biomes and their ancestral habitats and distributional areas. We analysed ecologically-significant characters, such as body size and metanotal characters, to test whether if morphology, habitat, or behaviour are connected. The relations of these features with the colonisation of wetter or drier biomes based on the distributional area, phylogeny and diversity of the genus were also tested. The results show that the ancestral distribution of the genus was the Atlantic Forest, and that biome occupancy, habitat, size, and mating behaviour evolved congruently through the phylogeny, drawing a coherent pattern of changes through Eidmanacris evolution toward the colonisation of drier biomes. Our results indicate that gallery forests could play a key role in the distribution and diversification of Eidmanacris species.
Item Proposal for a Geobiodiversity Index Applied to the Morphoclimatic Domain of Cerrado—Brazil(2021-06-30) Steinke, Valdir AdilsonThe Morphoclimatic Domain of Cerrado is located in the Brazilian territory, and it is a central area of great importance for the ecological scenario of Brazil. This area has undergone strong anthropic pressure in the last 60 years, especially due to the expansion of agribusiness—a warning sign for the conservation of its natural resources. Studies on geodiversity and biodiversity have sought to contribute with data for maintaining the landscapes of this region. The objective of this proposal is the generation of a geobiodiversity index capable of indicating the most relevant areas of geological, geomorphological, and vegetation aspects to be preserved and conserved within existing legal instruments. The methodological procedures were centered on segmenting the area in 2.472 hexagonal cells, which were subjected to a spatial matrix analysis in GIS and geostatistical environments capable of articulating the various elements and generating an agglutinating index for each cell. The result indicates 276 areas with the highest index value, presenting, therefore, possible classified areas. This index is an attempt to draw attention to Cerrado and the importance of its conservation.