We examined tree species responses under forest harvesting and an increased fire disturbance scenario due to climate warming in northern Wisconsin where northern hardwood and boreal forests are currently predominant. Individual species response at the ecosystem scale was simulated with a gap model, which integrates soil, climate and species data, stratified by ecoregions. Such responses were qu...

A range extension for Hahn’s short-tailed fruit bat, Carollia subrufa, is reported which extends the distribution of the species from the Pacific Dry Forest into the Pacific Moist Forest ecoregion. This raises the possibility that the species may be more widely distributed in Costa Rica than currently supposed, adding almost 30,000 km of potential range.

Background: Anthropogenic impacts on the environment often result in loss of biodiversity. However, the effects of different parameters (such as soil pH) on biodiversity, which can be influenced by human activities, are poorly investigated on a global scale. The paper at hand proposes an approach to examine the relationship between biodiversity and several parameters, which can be anthropogenic...

—This work summarizes pre-1998 studies of population abundance of stream resident redband trout Oncorhynchus mykiss ssp. in Oregon, and compares basin-level surveys of habitat and fish populations in streams of two ecoregions. Interquartile values of density and biomass were used to develop benchmarks of high, moderate, and low abundance. Comparison among Crooked River streams (Blue Mountain ec...

Male imagos of Pseudochironomus viridis (Kieffer) are redescribed, the immature stages are described and figured for the first time. During this study, larva and pupal exuviae associated to P. richardsoni (Malloch) were recorded for the first time for South America. The specimens were collected from a stream and a river in the Pampasic Hills System in the Chaco Serrano ecoregion of Argentina.

Mismatches between invasive species management policies and ecological knowledge can lead to profound societal consequences. For this reason, natural resource agencies have adopted the scientifically-based density-impact invasive species curve to guide invasive species management. We use the density-impact model to evaluate how well management policies for a native invader (Juniperus virginiana...

Riparian buffers are of major concern for land and water resource managers despite their relatively low spatial coverage. In Europe, this concern has been acknowledged by different environmental directives which recommend multi-scale monitoring (from local to regional scales). Remote sensing methods could be a cost-effective alternative to field-based monitoring, to build replicable "wall-to-wa...

A new species of Chusquea subg. Rettbergia is described, illustrated and compared with C. bambusoides. Chusquea yungasensis sp. nov. differs from other species of subg. Rettbergia by its racemose synflorescences. The new species is endemic to Bolivia, and found only in the Yungas ecoregion. Although this subgenus is exclusive to South America, this new species represents the first record of the...