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Displaying 1181 - 1185 of 1195Cholinesterases in Aquatic Biomonitoring: Assay Optimization and Species-Specific Characterization for a California Native Fish
Cholinesterase (ChE) enzyme activity measurements are widely applied in aquatic organisms for water quality monitoring, especially for pesticide contamination in agricultural watersheds. These biomarkers are amenable to measurement in a variety of species, and are therefore useful for examining effects in model organisms relevant to the ecosystem of interest. However, extensive variation in ChE biochemistry exists among tissues and species. This variation is rarely characterized and may lead to biases in the interpretation of activity determinations.
Forest Restoration in Landscapes. Beyond Planting Trees
The importance of restoration continues to grow, and this book integrates the restoration of forest functions into landscape conservation plans. The global conservation organization WWF has made forest landscape restoration a key topic and priority for its environmental work. Due to the WWF’s extensive global reach, and together with its many partners and counterparts, it has acquired a significant level of experience on the topic of forest restoration at large scales.
Agriculture in the Northwest-European delta metropolis
The southern and central regions of The Netherlands are part of the Northwest- European Delta Metropolis. The demands placed by modern, urban society on the agricultural sector are numerous. Not only are the environment, animal welfare, and food hygiene and quality at stake here, but also must these demands be met in a period of a structural decline in economic yields and under the permanent pressure of a shortage of available land. Intensification and increase of scale, which have characterized European agriculture for a long time, are set to continue in the future.
The new dimensions of the European landscape
The Frontis Workshop on the New Dimensions of the European Landscape was held on 10-12 June 2002. Wageningen University and Research Centre organized this workshop aiming to develop visions on the landscape in Europe, its development and design in the future and to strengthen the international network in landscape planning
test of multiple hypotheses for the species richness gradient of South American owls
Many mechanisms have been proposed to explain broad scale spatial patterns in species richness. In this paper, we evaluate five explanations for geographic gradients in species richness, using South American owls as a model. We compared the explanatory power of contemporary climate, landcover diversity, spatial climatic heterogeneity, evolutionary history, and area. An important aspect of our analyses is that very different hypotheses, such as history and area, can be quantified at the same observation scale and, consequently can be incorporated into a single analytical framework.