نتایج جستجو برای: wildlife habitat needs to meet critical requirment water
تعداد نتایج: 10924908 فیلتر نتایج به سال:
Barbed and woven wire fences, common structures across western North America, act as impediments to wildlife movements. In particular, fencing influences pronghorn (Antilocapra americana) daily and seasonal movements, as well as modifying habitat selection. Because of fencing's impacts to pronghorn and other wildlife, it is a potentially important factor in both wildlife movement and habitat se...
Recycling reduces the total number of trees that are cut down to make paper and can reduce overall demand for wood. But more importantly, paper recycling saves forests. By substituting used paper for trees, recycling reduces the overall intensity of forest management needed to meet a given demand for paper, and the pressure to convert natural forests and ecologically sensitive areas like wetlan...
heuristics are often used to provide solutions for flow shop scheduling problems.the performance of a heuristic is usually judged by comparing solutions and run times on test cases.this investigation proposes an analytical alternative ,called asymptotic convergence ,which tests the convergence of the heuristic to a lower bound as problem size grows. the test is a stronger variation of worst cas...
In the southern United States, herbicide use continues to increase for timber management in commercial pine (Pinus spp.) plantations, for mod@ing wildlife habitats, and for invasive plant control. Several studies have reported that single applications of forestry herbicides at stand initiation have minor and temporary impacts on plant communities and wildlife habitat conditions, with some repor...
~ Riparian lands are among the most productive ecosystems on earth. They occupy only a small proportion of the landscape but frequently support a greater variety and abundance of animal life than adjacent habitats. ~ Important habitat components include vegetation (often taller, denser, more diverse, and more complex in riparian lands), food, standing water, shelter from predators, sites for ne...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
. MIQUELLE, D. G., ET AL. 1999a. A habitat protection plan for the Amur tiger: developing political and ecological criteria for a viable landuse plan. Pp. 273–295 in Riding the tiger: meeting the needs of people and wildlife in Asia (J. Seidensticker, S. Christie, and P. Jackson, eds.). Cambridge University Press, Cambridge, United
The British Columbia Ministry of Forests is developing a practical classification system for British Columbia’s wetland and riparian ecosystems. The project has identified a diversity of wetland and riparian ecosystem types, in terms of environmental profiles, regional distribution, and habitat values. Urbanization, agricultural development, hydrological modification, livestock grazing, intensi...
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