نتایج جستجو برای: wilderness areas
تعداد نتایج: 402708 فیلتر نتایج به سال:
BACKGROUND Identifying hosts of blood-feeding insect vectors is crucial in understanding their role in disease transmission. Rhodesian human African trypanosomiasis (rHAT), also known as acute sleeping sickness is caused by Trypanosoma brucei rhodesiense and transmitted by tsetse flies. The disease is commonly associated with wilderness areas of east and southern Africa. Such areas hold a diver...
A move by the US government to preserve more public lands as wilderness has been welcomed by environmentalists but has angered ranchers, sportsmen and energy companies that fear access to land will be reduced. The new policy, initiated at the end of last year, directs the Bureau of Land Management to survey its vast holdings from Alaska to Arizona in search of unspoilt wildlife areas. The agenc...
One topic of increasing interest to conservationists is to assess the human value of ecosystems, from the provision of food and water to recreation, carbon storage and supporting biodiversity, to better understand their importance. But biodiversity and other ecosystem services are increasingly threatened by human activities. The hope among conservation biologists and policy makers is that futur...
Introduction: Wilderness or backcountry diarrhea is a type of travelers’ diarrhea commonly caused by Cryptosporidium and Giardia, which can survive freezing temperatures. Campsites pose additional risks worldwide, irrespective of developing or developed regions, due to inadequate hygiene. Methods: In a first of its kind, an outbreak of wilderness diarrhea...
Farmland abandonment takes place across the world due to socio-economic and ecological drivers. In Europe agricultural and environmental policies aim to prevent abandonment and halt ecological succession. Ecological rewilding has been recently proposed as an alternative strategy. We developed a framework to assess opportunities for rewilding across different dimensions of wilderness in Europe. ...
In the Sierra Nevada Mountain wilderness backcountry, debate has occurred regarding the impact of cattle, pack animals, and humans on microbial contamination of the watershed. Using coliform bacteria as a marker, we hypothesized that water from high alpine watersheds with more frequent human or animal use patterns would have increased risks for presence of potentially harmful microbes. We analy...
form the basis fo r experience based setting management o f outdoor recreation areas. To test the assumptions a sample o f wilderness users was surveyed and divided into experience groups based on differences in the specific experiences they desire. These experience groups were then tested fo r differences in their activity and setting preferences. The study was conducted at the Bridget Wildern...
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