Abstract:The Atlantic Forest is considered one of the world's biological diversity hotspots but is nevertheless increasingly threatened with the rapid destruction and fragmentation of its natural areas. In the state of Santa Catarina, southern Brazil, remnants of the mixed ombrophilous forest and seasonal deciduous forest exist as islands within large areas of agriculture, pastures and human settlements. Here we present information on species richness and habitat use by anurans in the Floresta Nacional de Chapecó, located in the western portion of the state of Santa Catarina. Anurans were surveyed by active search of potential reproductive sites from December 1998 to December 2001. A total of 29 species were recorded, most of which have a known distribution restricted to southern Brazil and adjacent countries (Argentina, Paraguay, and Uruguay) and use open areas for reproduction. The species composition was most similar to other areas of mixed ombrophilous forest and seasonal deciduous forest from the extreme south of Brazil. The information in this study may support the implementation of conservation and management strategies in the area. Resumo: A Floresta Atlântica é um dos hotspots mundiais de diversidade biológica, mas se encontra cada vez mais ameaçada devido a rápida destruição e fragmentação das áreas naturais. No Estado de Santa Catarina, os remanescentes de Floresta Atlântica formam ilhas em meio a amplas áreas de cultivo agrícola, pastagens e habitações humanas. Neste estudo, apresentamos informações sobre a riqueza de espécies e uso do ambiente pelos anuros na Floresta Nacional de Chapecó (FNC), localizada nos municípios de Guatambú e Chapecó, Estado de Santa Catarina. A coleta de dados foi realizada entre dezembro de 1998 e dezembro de 2001. Os registros foram realizados por meio de busca ativa em sítios potencialmente utilizados para a reprodução das espécies. Foram registradas 29 espécies de anuros. A maioria das espécies registradas apresenta distribuição geográfica restrita ao sul do Brasil e países vizinhos (Argentina, Paraguai e Uruguai), e utilizam áreas abertas para a reprodução. A composição de espécies da FNC foi mais similar a outras áreas de floresta ombrófila mista e floresta estacional decidual do extremo sul do Brasil. As informações deste estudo podem auxiliar na implementação de estratégias de conservação e manejo da área. Palavras-chave: anfíbios, uso de ambiente, floresta ombrófila mista, Santa Catarina, Brasil.
The taxonomic status of a disjunctive population of Phyllomedusa from southern Brazil was diagnosed using molecular, chromosomal, and morphological approaches, which resulted in the recognition of a new species of the P. hypochondrialis group. Here, we describe P. rustica sp. n. from the Atlantic Forest biome, found in natural highland grassland formations on a plateau in the south of Brazil. Phylogenetic inferences placed P. rustica sp. n. in a subclade that includes P. rhodei + all the highland species of the clade. Chromosomal morphology is conservative, supporting the inference of homologies among the karyotypes of the species of this genus. Phyllomedusa rustica is apparently restricted to its type-locality, and we discuss the potential impact on the strategies applied to the conservation of the natural grassland formations found within the Brazilian Atlantic Forest biome in southern Brazil. We suggest that conservation strategies should be modified to guarantee the preservation of this species.
This study presents a list of anurans in the northern region of the Tocantins River Basin (states of Tocantins and Maranhão), with information regarding seasonality, habitat, and microhabitat. We recorded 38 species in 15 genera and seven families. Most species (47 %) occurred exclusively in open areas and only 11 % of the species were found in forest habitats. Around 82 % of species were observed in ponds and only 7 % occurred in streams. Regarding seasonality, 54 % were observed both in the rainy and dry seasons. The northern area of the Cerrado has being rapidly converted in monocultures and information on its anuran fauna is limited. Additional information on its biodiversity is neeed in order to provide the framework for conservation strategies.
Abstract:In the present study we report new records of the anurans Hypsiboas curupi, Scinax littoralis, Dendropsophus elegans, and Crossodactylus schmidti for the state of Santa Catarina. These records expand the geographic distribution currently known for these species and contribute for the knowledge of the southern Brazilian anuran fauna.
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