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Displaying 631 - 635 of 1195

Modeling land suitability/capability using fuzzy evaluation

Journal Articles & Books
Décembre, 2014
États-Unis d'Amérique

Modeling the suitability of land to support specific land uses is an important and common GIS application. Three classic models, specifically pass/fail screening, graduated screening and weighted linear combination, are examined within a more general framework defined by fuzzy logic theory. The rationale underlying each model is explained using the concepts of fuzzy intersections, fuzzy unions and fuzzy averaging operations. These fuzzy implementations of the three classic models are then operationalized and used to analyze the distribution of kudzu in the conterminous United States.

Conservation of biodiversity in private lands: are Chilean landowners willing to keep threatened species in their lands?

Journal Articles & Books
Décembre, 2014

BACKGROUND: The biological conservation in private lands largely depends upon landowners’ willingness to keep populations of wild species on them, an issue highlighted by the Convention on Biological Diversity. In this study, we aim (i) to understand small landowners’ behavioural intentions, or relative intensity to adopt a given behaviour, towards threatened wildlife and (ii) to assess the role of local ecological knowledge, awareness of protected area, and forest ownership on landowners’ behavioural intentions towards threatened biodiversity.

Climate Change and Agricultural Development: Adapting Polish Agriculture to Reduce Future Nutrient Loads in a Coastal Watershed

Journal Articles & Books
Décembre, 2014
Pologne

Currently, there is a major concern about the future of nutrient loads discharged into the Baltic Sea from Polish rivers because they are main contributors to its eutrophication. To date, no watershed-scale studies have properly addressed this issue. This paper fills this gap by using a scenario-modeling framework applied in the Reda watershed, a small (482� km²) agricultural coastal area in northern Poland. We used the SWAT model to quantify the effects of future climate, land cover, and management changes under multiple scenarios up to the 2050s.

Patterns of seagrass community response to local shoreline development

Journal Articles & Books
Décembre, 2014

Three quarters of the global human population will live in coastal areas in the coming decades and will continue to develop these areas as population density increases. Anthropogenic stressors from this coastal development may lead to fragmented habitats, altered food webs, changes in sediment characteristics, and loss of near-shore vegetated habitats. Seagrass systems are important vegetated estuarine habitats that are vulnerable to anthropogenic stressors, but provide valuable ecosystem functions.

GIS based mapping of land cover changes utilizing multi-temporal remotely sensed image data in Lake Hawassa Watershed, Ethiopia

Journal Articles & Books
Décembre, 2014
Éthiopie

Classifying multi-temporal image data to produce thematic maps and quantify land cover changes is one of the most common applications of remote sensing. Mapping land cover changes at the regional level is essential for a wide range of applications including land use planning, decision making, land cover database generation, and as a source of information for sustainable management of natural resources.