Anurans of a subtropical montane forest in northwestern Argentina: ecological survey and a proposed list of species of conservation concern (original) (raw)
Related papers
We present an anuran inventory of the mountain region of the Serra do Mar, Brazil, located in the Atlantic Forest biome. We conducted a fieldwork comprising the major and best well-preserved Atlantic Forest remnants from Brazil, using acoustic and visual nocturnal/diurnal assessments. In total, we recorded 99 anuran species, of which about 70% are endemic to the Atlantic Forest and represent around 20% of all amphibian species described for this biome. The high levels of endemism, the distribution patters and the conservation status of the anuran species turn the mountains of the Serra do Mar into a key conservation region for amphibians within the Atlantic Forest hotspot.
2015
Our goal was to assess the species composition, reproductive modes and conservation status of the anurans of Araucaria Forest and Atlantic Rain Forest in the Campina Grande do Sul (CGS) and Bocaiuva do Sul (BS), in the state of Parana, Brazil. The list of species was assembled based on field and museum records. We recorded 35 species that showed 11 different reproductive modes. Thirty five species occurred in CGS and 20 in BS, one species is classified as “data deficient” under the IUCN criteria while just two species hold this classification within the state. Amphibian richness in these areas correspond to 24% of the known species diversity known for Parana. Species richness and community composition correspond to the regional phytophysiognomy and local environmental heterogeneity.
2019
The Brazilian Cerrado is one of the 25 most important biodiversity hotspots, considered the most threatened savanna on earth. Amphibians are especially vulnerable to habitat modifications due to behavioral and physiological traits. Herein, we list the anuran species of a Cerrado area in southeastern Brazil and provide information on habitat use and reproductive activity. For 12 months, between 2010 and 2011, we surveyed and registered habitat occupation and temporal distribution of anurans at the study site. A total of 20 species belonging to seven families were recorded. At least two species found here are considered Data Deficient by the IUCN Red List of Threatened Species, two have unreported status, and one is Critically Endangered. Moreover, seven species need status updating. Thus, we highlight that even disturbed fragments are crucial to maintain frog diversity, especially for species with restricted distribution, taxonomic uncertainties and/or that require more information o...
Anuran Species Composition and Distribution Patterns in Brazilian Cerrado, a Neotropical Hotspot
South American Journal of Herpetology, 2012
species distribution patterns result from the combination of multiple factors acting over different spatial and temporal scales. We analyze the distribution patterns of anuran amphibians within the cerrado domain of south America in a historical framework. First, we provide an updated list of species based on extensive research in zoological collections and fieldwork. We then explore patterns of endemism and the distribution of species occurring both in cerrado and each of the adjoining domains, providing directions for future hypotheses tests. We found 209 anuran species occurring in localities within cerrado. Among them, 150 are primarily associated with cerrado, and 59 are typical of one of the cerrado adjoining domains. Widespread species account for only 14% of the cerrado typical species. species occurring in cerrado and one adjoining domain present a highly structured spatial pattern in which Amazonian species are restricted to the northwestern cerrado, Atlantic species to the southeastern cerrado, caatinga species to the northeastern cerrado, and chaco species to the southwestern cerrado. cerrado endemics occur in most localities and in all regions, whereas narrow endemics (< 60,000 km 2 ) are restricted to mountain ranges in central, southeastern, and southwestern cerrado. the limited distribution of species shared with one of the four adjoining domains highlights the influence of independent species pools more associated with other domains.
Amphibia-Reptilia, 2005
Annual patterns of breeding activity, reproductive modes, and habitat use are described for a frog community in a seasonal environment, in the southern Pantanal, Mato Grosso do Sul, Brazil. Data were collected monthly between January 1995 and December 1998. A total of 24 species from four families; Bufonidae (3 species), Hylidae (10 species), Leptodactylidae (9 species), and Microhylidae (2 species) were registered. Three reproductive activity patterns are recognized among these species: continuous, explosive, and prolonged; 50% of the species were explosive breeders. Seasonal pattern of reproduction was verified for three analyzed years (1995-1997); most species reproduced during the rainy season (Nov-Jan). The reproduction was aseasonal in 1998; unexpected rains in the dry season lead to an unusual breeding activity. Five reproductive modes were noted — 62.5% of the species have the generalized aquatic mode, and 33.3% deposit eggs embedded in foam nests. Many species used the same...
Revista de Biología Tropical, 2017
The distribution of amphibians is affected by abiotic and biotic factors, availability of resources and the characteristics of reproductive sites. In particular, reproductive activity of aquatic-breeding anurans that inhabit tropical dry areas is affected by rainfall, which determines the availability and quality of reproductive sites. In this study, we analyzed the spatial and temporal distribution of anurans with indirect development in a tropical dry forest in Western Mexico, during two rainy seasons (July 10-October 4, 2013, and June 26-September 26, 2014). We collected data on the occupancy and reproductive activity of 15 species in four temporary streams, and evaluated their relationship with precipitation, humidity and temperature. We determined richness, abundance and diversity of species in each stream; we also identified differences in the reproductive strategies and microhabitats used by the species. The most abundant species were: Tlalocohyla smithii and Exerodonta smara...
Composition of amphibian assemblages in agroecosystems from the central region of Argentina
The anuran diversity, abundance, richness and evenness were examined in agroecosystems from the central region of Argentina, area that was greatly altered by agricultural activities. Relationships with climatic characteristics were also analyzed. To capture anurans, pitfall trap transects were established. A total of 561 amphibians of seven species, belonging to four families (Bufonidae, Leiuperidae, Cycloramphidae, and Leptodactylidae) were recorded. Stepwise multiple linear regressions showed strong positive association between both species richness and anuran abundance with habitat variables as rainfall and rain-day. The anuran richness observed in the studied areas is similar to other sites with level of alteration comparable, but the anuran richness and abundance observed here is lower compared with the records of anuran species for the region before agricultural development. Thus, these results have suggested that amphibians may be particularly affected by habitat modification and degradation due to agricultural activities in the central region of Argentina, and it may be contributing to regression of their diversity and richness.
Anuran amphibians' diversity in a northwestern area of the Brazilian Pantanal
2011
In the Pantanal, the largest continuous floodplain in the world, the diversity and distribution of anuran amphibians vary in and across distinct subregions and distinct habitats occurring along inundation gradients. Permanent and natural aquatic habitats are relatively scarce in the Pantanal, and occurrence of temporary aquatic habitats varies seasonally, depending on rains. We here present results of evaluations of anuran's species richness and abundance in a seasonally flooded area in the northwestern section of the Pantanal (Fazenda Baía de Pedra, Cáceres municipality, state of Mato Grosso, Brazil), comparing values obtained in 10 plots systematically distributed over 5 km 2 with those obtained in additional aquatic plots in the study area. Data were obtained in five field trips, from February 2008 to March 2009. In addition to the plots, 36 water bodies (20 permanent and 16 temporary) were also sampled for the presence of anurans. In total, 3,983 individuals from 34 anuran species distributed in five families were recorded: Hylidae (14 species), Leptodactylidae (8), Leiuperidae (6), Microhylidae (4), and Bufonidae (2). Local richness represents 77.3% of the anuran diversity already recorded for the Brazilian Pantanal. The number of species recorded exclusively in systematically distributed terrestrial plots and in water bodies was 28 and 32, respectively. Sampling methods used at Fazenda Baía da Pedra were efficient in determining anuran richness, abundance, composition and distribution. Evaluations of anuran richness and abundance by using permanent sampling plots in the Pantanal may benefit from additional sampling sites, particularly permanent and temporary water bodies. PANSONATO, A., MOTT, T. & STRÜSSMANN, C. Diversidade de anfíbios anuros em uma area na porção noroeste do Pantanal brasileiro. Biota Neotrop. 11(4): http://www.biotaneotropica.org.br/v11n4/pt/ abstract?article+bn01711042011