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Species can occupy different realised niches when sharing the space with other congeneric species or when living in allopatry. Ecological niche models are powerful tools to analyse species niches and their changes over time and space. Analysing how species’ realised niches shift is paramount in ecology. Here, we examine the ecological realised niche of three species of wall lizards in six study areas: three areas where each species occurs alone; and three areas where they occur together in pairs. We compared the species’ realised niches and how they vary depending on species’ coexistence, by quantifying niche overlap between pairs of species or populations with the R package ecospat. Leer más.

 

Esta tesis doctoral presenta la primera aproximación a la paleobiogeografía de los anfibios y reptiles de la Península Ibérica durante el Cuaternario final, basada en una síntesis comparativa del registro conocido hasta ahora. Se han establecido dos regiones bióticas durante el Pleistoceno tardío: la primera localizada en el sur y centro ibéricos, con especies termófilas como las más representativas, y la segunda en el tercio norte ibérico, dominado por especies generalistas- eurosiberianas. Leer más.

https://www.tesisenred.net/bitstream/id/325664/?sequence=-1

 

Here, in order to advance understanding of the current infection status related to the presence of Batrachochytrium spp.
in different populations, we tested for the presence/absence (qualitative analysis) of Bd and Bsal in 13 monitored populations
and measured the Bd infection loads (quantitative analysis) of 16 populations of the Pyrenean Brook Newt in the French and
Spanish Pyrenean Mountains and present details of a population health monitoring program. Leer más.