Navegando por Assunto "Endemic species"

Agora exibindo 1 - 3 de 3

Artigo
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.
Artigo
Taxonomic study on a collection of terrestrial and freshwater gastropods from caves in Bahia state, Brazil, with the description of a new species
(2023-03) Salvador, Rodrigo Brincalepe; Silva, Fernanda Santos; Bichuette, Maria Elina
Gastropod samples were collected during expeditions to caves in Bahia state, northeastern Brazil, and are studied herein. Collection took place over the past five years, and gastropods were found in 14 caves distributed across six different municipalities: Campo Formoso, Carinhanha, Coribe, Feira da Mata, Central, and Ituaçu. A total of 19 species-level taxa of terrestrial and freshwater gastropods (representing 10 families) were collected, including representatives of the taxa Neritimorpha, Caenogastropoda, Hygrophila, and Stylommatophora. A new species is described herein: Helicina marfisae sp. nov. (Neritimorpha, Helicinidae).
Artigo
Wild dogs at stake: deforestation threatens the only Amazon endemic canid, the short-eared dog (Atelocynus microtis)
(Royal Society Open Science, 2020) Rocha, Daniel G.; Ferraz, Katia Maria P. M. de Barros; Gonçalves, Lucas; Tan, Cedric Kai Wei; Lemos, Frederico G.; Ortiz, Carolina; Peres, Carlos A.; Negrões, Nuno; Antunes, André Pinassi; Rohe, Fabio; Abrahams, Mark; Zapata-Rios, Galo; Teles, Davi; Oliveira, Tadeu; Mühlen, Eduardo M. von; Venticinque, Eduardo; Gräbin, Diogo M.; Mosquera, Diego; Blake, John; Guimarães, Marcela; Lima, Moreira; Sampaio, Ricardo; Percequillo, Alexandre Reis; Peters, Felipe; Payán, Esteban; Borges, Luiz Henrique M.; Calouro, Armando Muniz; Endo, Whaldener; Pitman, Renata Leite; Haugaasen, Torbjørn; Silva, Diego Afonso
The persistent high deforestation rate and fragmentation of the Amazon forests are the main threats to their biodiversity. To anticipate and mitigate these threats, it is important to understand and predict how species respond to the rapidly changing landscape. The short-eared dog Atelocynus microtis is the only Amazon-endemic canid and one of the most understudied wild dogs worldwide. We investigated short-eared dog habitat associations on two spatial scales. First, we used the largest record database ever compiled for short-eared dogs in combination with species distribution models to map species habitat suitability, estimate its distribution range and predict shifts in species distribution in response to predicted deforestation across the entire Amazon (regional scale). Second, we used systematic camera trap surveys and occupancy models to investigate how forest cover and forest fragmentation affect the space use of this species in the Southern Brazilian Amazon (local scale). Species distribution models suggested that the short-eared dog potentially occurs over an extensive and continuous area, through most of the Amazon region south of the Amazon River. However, approximately 30% of the short-eared dog’s current distribution is expected to be lost or suffer sharp declines in habitat suitability by 2027 (within three generations) due to forest loss. This proportion might reach 40% of the species distribution in unprotected areas and exceed 60% in some interfluves (i.e. portions of land separated by large rivers) of the Amazon basin. Our local-scale analysis indicated that the presence of forest positively affected short-eared dog space use, while the density of forest edges had a negative effect. Beyond shedding light on the ecology of the short-eared dog and refining its distribution range, our results stress that forest loss poses a serious threat to the conservation of the species in a short time frame. Hence, we propose a re- assessment of the short-eared dog’s current IUCN Red List status (Near Threatened) based on findings presented here. Our study exemplifies how data can be integrated across sources and modelling procedures to improve our knowledge of relatively understudied species.