Habitat use and reproductive activity of anurans from a Cerrado area in Minas Gerais State, southeastern Brazil (original) (raw)
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Anuran Species Composition from Chaco and Cerrado Areas in Central Brazil
Oecologia Australis, 2019
Herein, we present an updated inventory and the variations of frog communities' composition from five areas of humid Chaco and Cerrado in municipality of Porto Murtinho, Mato Grosso do Sul state, Brazil. This municipality is located in an area with three ecoregions: Chaco, Cerrado and Pantanal. Through acoustic and visual nocturnal/diurnal and pitfall evaluations from a period of over five years, we recorded 31 species in the Cerrado and 29 species in the humid Chaco. About 90% of the species were previously registered in the municipality of Porto Murtinho. A non-metric multidimensional analysis based on a presence/absence matrix revealed a separation in our sampling sites and communities with Cerrado and humid Chaco characteristics. This peculiarity in the species composition must be related to the transition zone, with the presence of mixed species characteristics of Cerrado and humid Chaco in both areas in the municipality of Porto Murtinho experiences a high degree of deforestation pressure, which threatens both the Cerrado and humid Chaco vegetation. This highlights the importance of knowledge actions about the richness and composition of species, corroborating ecological tools to support conservation in this region.
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.
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Reproductive modes and size-fecundity relationships are described for anurans from Picinguaba, a region of Atlantic rainforest on the northern coast of the state of São Paulo, Brazil. We observed 13 reproductive modes, confirming a high diversity of modes in the Atlantic rainforest. This diversity of reproductive modes reflects the successful use of diversified and humid microhabitats by anurans in this biome. We measured the snout-vent length of 715 specimens of 40 species of anurans. The size-fecundity relationship of 12 species was analyzed. Female snout-vent lengths explained between 57% and 81% of clutch size variation. Anurans with aquatic modes laid more eggs than those with terrestrial or arboreal modes. Larger eggs were deposited by species with specialized reproductive modes.
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...
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.
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