We used a crossed experimental design subjecting Rana temporaria larvae to four constant rearing temperatures (18, 22, 26, 28 °C) crossed with three environmentally relevant nitrate concentrations (0, 50, 100 mg×L−1) to investigate the interactive and individual effects of these stressors on metamorphic (i.e., growth and development) and physiological traits (i.e., metabolism and heat tolerance) at the onset of metamorphosis. Leer más.
Results confirmed model effectiveness in accurately identifying suitable conditions. Soil organic carbon (SOC), precipitation, and temperature emerged as the primary drivers influencing the species’ distribution. Leer más.
hese findings hold significance for ongoing enquiries into the species’ biogeography, morphology and ecological adaptations. In summary, the integration of morphological and osteological data with genetic information offers a promising avenue for potential taxonomic revisions of N. tessellata in the future. Leer más.
Un equipo paleontológico del CONICET halló al norte de la provincia de Santa Cruz, cerca de la localidad de Puerto Deseado, el fósil de un renacuajo de la especie Notobatrachus degiustoi, precursora lejana de las ranas y sapos actuales, que vivió hace 165 millones de años durante el Período Jurásico. Leer más.
Overall, our results showed that the studied amphibian metacommunity was negatively influenced both by direct and indirect anthropogenic factors, but also that many amphibian species were not only capable of occupying sites which had been altered by human action, but were even favored by land uses generating open habitat, a habitat type that is increasingly uncommon in the region, in the entire Iberian Peninsula and in Europe. Leer más.
