Atlas des Poissons d'eau douce de Guyane (tome 1) Book (PDF Available). New Atlas of Amphibians and Reptiles of Europe New Atlas of Amphibians and Reptiles of Europe. American frogs = Coqu es y otras ranas de read frogs ( amphibians) online. PDF Kindle book is very recommended for you all who likes to reader as collector, or just read a book to fill in spare time. Enjoy you are read it. ATLAS UNIVERSEL ET CLASSIQUE DE GEOGRAPHIE ANCIENNE, ROMAINE - DU MOYEN AGE, MODERNE ET CONTEMPORAINE - A L USAGE DES ETABLISSEMENTS D INSTRUCTION PUBLIQUE.
We describe a new Pristimantis from French Guiana, northern South America, which is mainly distinguished from known phenotypically related congeners ( i.e. Species from the polyphyletic unistrigatus species group) occurring at low and middle elevations in the Guiana Shield by the combination of a distinct tympanum, a lower ratio of tibia vs. Hand length, a reddish groin region, and a distinct advertisement call consisting of clusters of generally four short notes. The new species inhabits pristine primary forests on the slopes of isolated massifs reaching more than 400 m elevation, and seems not to occur below ca. 200 m above sea level. Such a sharp altitudinal limit suggests a strong influence of thermal variation on the distribution of the species, and therefore a potential sensitivity to climate change.
With only nine isolated populations documented so far, the new species should be prioritized for conservation. Historical climate fluctuations during the Quaternary are likely responsible for the distribution pattern of the new species.
. 451 Downloads.AbstractThe neotropical frog Eleutherodactylus johnstonei (Anura: Eleutherodactylidae) has been referred to as a highly invasive species on grounds of its wide distribution and is expected to extend its range significantly based on recent climate model assumptions. The frog was introduced to a number of South American mainland localities, including French Guiana. Other species of the genus have become invasive on oceanic islands such as Hawaii where they pose serious biological and economical problems. No data are available on the invasion status of E.
Atlas Des Amphibians De Guyane Pdf Viewer En
Johnstonei populations from coastal South America. Here we present the first assessment of the status of a mainland population from French Guiana 10 years after the introduction of the species. We found that the species has not spread significantly within the last ten years and so far does not exhibit a high invasion potential. Frogs were restricted to urban garden habitats showing significantly higher abundance in gardens containing ornamental potted plants. Distribution patterns were best explained by two dispersal-related factors operating at different scales: (1) distance of occupied sites to nearest population indicating short-distance active dispersal using stepping stone habitats, and (2) distance of occupied sites to shore with a distinct bimodal pattern indicating long-distance passive or jump-dispersal, most likely due to the exchange or transfer of ornamental plants. Even though past and current invasion potential can be considered low, we advocate the implementation of a regional monitoring scheme and detailed studies on biotic interactions with native fauna.
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