نتایج جستجو برای: fragmentation road resources
تعداد نتایج: 369605 فیلتر نتایج به سال:
a State Key Lab of Resources and Environmental Information System, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China b Department of Geography, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA c Department of Geology and Meteorology, Kean University, 1000 Morris Ave., Union, New Jersey 07083, USA d USDA-NRCS, 339...
ALASDAIR J. EDWARDS *, SUSAN CLARK , HUSSEIN ZAHIRà, ARJAN RAJASURIYA§, ABDULLA NASEERà and JASON RUBENS Department of Marine Sciences and Coastal Management, University of Newcastle, Newcastle Upon Tyne NE1 7RU, UK àMarine Research Centre, Ministry of Fisheries, Agriculture and Marine Resources, Male', Maldives §Coral Reef Research Programme, National Aquatic Resources Research & Development A...
Road mortality is the leading source of biodiversity loss in the world, especially due to fragmentation of natural habitats and loss of wildlife. The survey of the main species victims of roadkill is of fundamental importance for the better understanding of the problem, being necessary, for this, the correct species identification. The aim of this study was to verify if DNA barcodes can be appl...
Context Understanding the factors determining impacts of roads and how they fragment landscapes limiting movement animals, is key to implement efficient mitigation measures. Aims Here we investigate if road orientation in relation resources, a largely overlooked factor on impact assessments, can influence animals within landscape where water resources are spatially clustered. Methods We evaluat...
Computers with hard-disk storage and networks with dynamic spectrum access illustrate resources that allow fragmented items – in these examples, items are files and spectra, respectively. In our discrete model of such systems, the resource is a sequence of slots. There is a queue of items awaiting allocations of the resource; the queue is served in FIFO order. Specified for each item are the nu...
When circuits are set up and dismantled dynamically in elastic optical networks, the link spectrum becomes fragmented. The fragmentation limits available path choices may lead to significant blocking of connection requests. can be due non-contiguity spectral resources on individual links or non-continuity paths study its management is essential operate networks efficiently. This paper proposes ...
Nacrtak The combination of GIS tools and Analytic Hierarchy Process (AHP) techniques is used to develop a Decision Support System to rank the maintenance priorities of a forest road network according to the actual conditions and needs. The decision-making process is divided into 4 stages. The first stage fixes the objectives of the analysis as the minimization of the sediment production from ro...
Transportation infrastructure impedes the movement of animals, enhances their mortality due to collisions with vehicles, and decreases habitat size. We study the first two effects, using a spatially explicit individual-based model of population dynamics. We discuss the suitability of fences. Fences can either enhance or reduce survival probability, depending on the degree of road avoidance and ...
Aim: To explore the feasibility to make on-road assessments routinely at 3 months follow-up for all patients with a 3 months verbal prohibition of driving after stroke, to support the physicians decision of fitness to drive. Methods: From September 2007 to December 2009 there were 151 stroke patients from the stroke units at the hospital eligible for inclusion in the study. Fifty agreed to be a...
Water resource has become a key constraint for implementing the “Belt and Road” initiative which was raised by Chinese government. Besides study of spatial temporal variability precipitation, this created water hazard risk map along zone through combined flood drought data from 1985. Our results showed that South-Eastern Asia, southern China eastern Southern Asia are areas with most abundant pr...
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