نتایج جستجو برای: fragmentation road resources
تعداد نتایج: 369605 فیلتر نتایج به سال:
1 ICARNational Bureau of Fish Genetic Resources, Canal Ring Road, Teli Bagh, Lucknow – 226 002, Uttar Pradesh, India . 2 (Present address): ICAR Central Institute of Fisheries Education, Panch Marg, Off Yari Road, Mumbai-400 061, Maharashtra, India. 3 Aquaculture Research Training Unit, ICAR National Bureau of Fish Genetic Resources, Chinhat, Faizabad Road, Lucknow-227105, Uttar Pradesh, India....
Hann, Wendel J.; Wisdom, Michael J.; Rowland, Mary M. 2003. Disturbance departure and fragmentation of natural systems in the interior Columbia basin. Res. Pap. PNW-RP-545. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p. We integrated landscape data from science assessments of the interior Columbia basin (basin) into one variable that func...
human activities often adversely affect natural landscapes and ecosystems. natural landscapes consist of habitats, and habitat loss and fragmentation are major threats to biodiversity. environmental impact assessment (eia)as a systematic and well documented procedure to identify, describe and assess the direct and indirect effects of a developmental project in different environments does not co...
background: the aim of this study was to assess the effects of road deicing salt on the quality of the ground water resources in hamadan province during winter season. methods: water samples were taken monthly from thirty wells located around the hamadan-asadabad highway. the quality of well water was examined by measuring amount of sodium, chloride, total hardness, total dissolved solid, elect...
Roads have impacts on the fauna arising from habitat fragmentation, roadkill and barrier effect. Furthermore, roads lead species to change their activity with repercussions predator–prey interactions trigger indirect effects that are currently unknown. This study analyzes effect of a motorway trophic behavior terrestrial carnivore community its surroundings. Monthly scat sampling was conducted ...
Urbanization and related anthropogenic modifications cause extent of habitat fragmentation and directly lead to decline of local biodiversity. Conservation biologists advocate corridor creation as one approach to rescue biodiversity. Here we examine the utility of roads as corridors in preserving plant diversity by investigating roadside vegetation in Yellow River Delta (YRD), China. We examine...
(2013) A new methodology for measuring land fragmentation. Abstract The presence of land fragmentation implies that the existing land tenure structure is defective. It is a major problem in many regions because it restricts agricultural development and reduces the opportunities for sustainable rural development. Whilst policies to counter land fragmentation require reliable measurement indices,...
The Serengeti wildebeest migration is a rare and spectacular example of a once-common biological phenomenon. A proposed road project threatens to bisect the Serengeti ecosystem and its integrity. The precautionary principle dictates that we consider the possible consequences of a road completely disrupting the migration. We used an existing spatially-explicit simulation model of wildebeest move...
1 Beaufort Laboratory Southeast Fisheries Science Center National Marine Fisheries Service, NOAA 101 Pivers Island Road Beaufort, North Carolina 28516 2 Swedish University of Agricultural Sciences Department of Aquatic Resources Lysekil, 45330, Sweden 3 Department of Earth Sciences University of Gothenburg Gothenburg, 40530, Sweden 4 Marine Resources Research Institute South Carolina Department...
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