BACKGROUND We evaluated the direct and indirect influence of climate, land use, phylogenetic structure, species richness and endemism on the distribution of New World threatened amphibians. METHODOLOGY/PRINCIPAL FINDINGS We used the WWF's New World ecoregions, the WWFs amphibian distributional data and the IUCN Red List Categories to obtain the number of threatened species per ecoregion. We a...

Understanding the relationships between ecosystem services is important for promoting ecosystem service management and sustainable development. The relationships between ecosystem services have commonly been characterized as tradeoffs and synergies. Here, we report that a third type of relationship also exists, in which one ecosystem service constrains the other. Selecting the grassland and agr...

Aquatic ecoregions were increasingly used as spatial units for aquatic ecosystem management at the watershed scale. In this paper, the principle of including land area, comprehensiveness and dominance, conjugation and hierarchy were selected as regionalizing principles. Elevation and drainage density were selected as the regionalizing indicators for the delineation of level I aquatic ecoregions...

Oregon is one of the most diverse states in the U.S., containing between six and ten nationally recognized ecoregions, depending on various ecoregion classifications. The state includes habitats which range from the moist and mild coast redwood forests of Curry County to the extremely dry playas of the Alvord Desert. Elevations range from coastal salt marshes at sea level, to alpine peaks over ...

The South American Gran Chaco ecoregion extends through great areas of Argentina, Paraguay, Bolivia, and Brazil. region includes vast forests that serve as an important reservoir tropical subtropical diversity. In spite its extent high biodiversity, it remains unexplored area regarding Oribatida. We made bibliographic research about the oribatid mites previously registered. bibliography Argenti...

The study of biodiversity is a fundamental step to develop conservation strategies. Reptile populations are immersed in global crisis, due anthropic disturbances. Almost the entire Pampa ecoregion Argentina was modified for agricultural and livestock activities, only remnants mountain native grasslands Buenos Aires province being Tandilia Ventania systems. reptiles have been exhaustively resear...

This paper reports a phylogeny of the African killifishes (Genus Nothobranchius, Order Cyprinodontiformes) informed by five genetic markers (three nuclear, two mitochondrial) 80 taxa (seven undescribed and 73 92 recognized species). These short-lived annual fishes occupy seasonally wet habitats in central eastern Africa, their distribution coincides largely with East Rift System (EARS). The fos...