The Carandilla Palm (Trithrinax schizophylla Drude, Arecaceae) is not extinct in Brazil: first primary records from the Chaco region of Mato Grosso do Sul

Tomás, Walfrido Moraes; Ishii, Iria Hiromi; Urbanetz, Cátia; Tomas, Marcelle Aiza; Camilo, André Restel; Cano, Ángela

doi:10.15560/11.4.1669

Cited by 3 publications

(1 citation statement)

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“…The Chaco is a typical open dry forest formation in southern South America. Currently, the replacement of native vegetation with cultivated pastures has reduced its original cover to about 13%, making the Chaco one of the most threatened ecoregions in Brazil (Bucher & Huszar 1999;Souza et al 2010;Tomas et al 2015;Alves et al 2018). The studied area is characterised by a seasonal climate with a dry season during the winter, from April to September, and a rainy season during the summer, from October to March ('Aw' according to Köppen-Geiger;Beck et al 2018).…”

Section: Study Areamentioning

confidence: 99%

Amount and spatial distribution of habitats influence occupancy and dispersal of frogs at multiple scales in agricultural landscape

et al. 2020

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Agriculture changes the aquatic and terrestrial habitats used by animals, affecting their responses to matrix permeability. Here, we evaluated the impacts that resulted from the replacement of native vegetation with pastures on habitat occupancy, colonisation and local extinction of two Neotropical frogs with contrasting ecological strategies, Leptodactylus bufonius and L. chaquensis. We conducted fieldwork during two reproductive seasons in 50 temporary ponds in the Brazilian Chaco. We used site occupancy models in a multi‐scale approach to identify landscape changes affecting population parameters and to determine the scale of interaction between species and the landscape. At local (10 m) and scales ≤400 m, increased pasture proportion limited the availability of bare soil required by males of L. bufonius to build mud chambers for reproduction and decreased proportion of shrublands affecting L. chaquensis occupancy. At larger spatial scales (>400 m), landscape modification limited dispersal of the smaller species L. bufonius. We found that the amount of habitat available is important in maintaining population parameters such as occupancy. However, our results highlight that the spatial distribution of habitats may also play an important role in the persistence and mobility of frogs in agricultural landscapes and that it is possible to identify a scale of effect in such anthropic landscapes. We recommend the consideration of reproductive and dispersal requirements of amphibian species, along with body size, as predictors of the spatial scale for management of populations in farmlands.

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