Small dams are ubiquitous yet poorly understood features in many streams. Dam removal is being used increasingly in stream restoration projects as a means to enhance habitat connectivity and ecosystem function. However, habitatand assemblage-level effects of small dams on stream mollusk assemblages are poorly documented. We examined associations between stream physicochemical habitat variables ...

increasing patch edges in natural habitats, as a result of habitat fragmentation, are a major threat for wildlife populations, especially avifaunal communities. habitat edges provide different conditions compared to the core area which can directly or indirectly cause changes in species number, population and composition. this fact will demand a dissimilar management strategy. this study was co...

Ecological fingerprints of climate change are becoming increasingly evident at broad geographical scales as measured by species range shifts and changes in phenology. However, finer-scale species-level responses to environmental fluctuations may also provide an important bellwether of impending future community responses. Here we examined changes in abundance of butterfly species along a hydrol...

iran is one of the most important centers of diversity for onobrychismill. genus. onobrychis species collected from different habitates of kermanshah province during 2010-2012 were evaluated and the relationship among their eco-geographical distribution, geographical and ecological characteristics was analyzed using arcgis.  the results showed that most of the species of onobrychis grow in the ...

Inappropriate forest management activities, above all clear-cutting, are recognized as the major threats to an iconic orchid species—the lady’s slipper (Cypripedium calceolus), flagship species of nature protection in Europe. Although clear-cutting protected species’ localities is strongly regulated many European countries, salvage logging allowed some circumstances (e.g., following windstorms,...