Livros e Publicações
URI permanente para esta coleçãohttps://bdc.icmbio.gov.br/handle/cecav/1481
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Item Overcoming the lack of distribution data for range-restricted habitat specialist frogs(Austral Ecology, 2024-05-08) Barata, Izabela M.; Uhlig, Vivian M.; Cortês, Lara G.; Fath, Franciele; Griffiths, Richard A.With over 40% of species threatened with extinction, the distributional range of most amphibians is still unknown, generating uncertainty whether species are naturally rare, under-sampled, or difficult to detect. We implemented a modelling approach that uses bromeliads as surrogates to predict the distribution of habitat specialist frogs that lack distributional data. We aimed to predict and survey potential new sites for the occurrence of a rare and microendemic bromeliad-dwelling frog from the Atlantic Rainforest of Brazil. We used Maxent to predict suitable areas based on climate and topographic profiles, combined with 21 occurrence records of bromeliads within which our target frog species (Crossodactylodes itambe) is strictly restricted. The bromeliad-based models identified four areas potentially suitable, and subsequent surveys revealed an entirely new species of a rare bromeliad-dwelling frog in one of the areas. We demonstrate that using easy-to-survey surrogate species that have a strong relationship with species that are hard to detect has enormous potential to reveal crucial information on the potential ranges and distribution of cryptic taxa. Such a surrogate modelling approach could be extended to other habitat specialist species that lack distribution data, such as amphibians restricted to specific refugia and/or reproduction sites. This could improve the targeting of surveys and increase understanding of the patterns of rarity and the drivers of species distribution, especially for areas with high endemicity and range-restricted frogs.Item Downscaling the gap: protected areas, scientific knowledge and the conservation of amphibian species in Minas Gerais, Southeastern Brazil.(BioOne, 2016) Barata, Izabela M.; Uhlig, Vivian M.; Silva, Graziele H.; Ferreira, Guilherme B.Protected areas (PAs) cover a small proportion of the Earth’s surface and most species are not covered by the current network. Am phibians are the least represented group in PAs around the world and expanding the network is still the major recommendation for species conservation. We evaluated the effectiveness of PAs in safeguarding endemic amphibians in the Cerrado biome of Minas Gerais state, south eastern Brazil. We conducted a gap analysis to highlight site-based conservation actions for target species within study site. We extracted occurrence points from the national database and calculated the intersection between the minimum convex polygon and natural vegetation remnants for each species. For each target species, we calculated the percentage of the range covered by PAs and assessed the scientific knowl edge based on academic publications between 1950–2015. We recorded 206 amphibians in Minas Gerais, of which 127 occur in the Cerrado. We identified 24 target species and concluded that 80% are insufficiently protected by the current PA network. A quarter of the species have zero coverage and most species have < 30% of their range legally protected. In southwestern Minas Gerais, we recommend habitat restoration and connectivity to provide additional habitat to target species. In western Minas Gerais, the creation of PA seems to be the best solution. The distribution of target species is concentrated in the Espinhaço Mountain Range, where we recommend the establishment of biodiversity corridors. We examined 246 publications, most of which focus on taxonomy. Few species have sufficient information to have their conservation status re-assessed, with only 26.8% of publications containing specific information on conservation. Scientific knowledge must be improved for all research areas, especially species distributions and ecology, to support evidence-based conservation and management actions.