نتایج جستجو برای: wildlife livestock ecosystem
تعداد نتایج: 118737 فیلتر نتایج به سال:
The widespread replacement of wild ungulate herbivores by domestic livestock in African savannas is composed of two interrelated phenomena: (1) loss or reduction in numbers of individual wildlife species or guilds and (2) addition of livestock to the system. Each can have important implications for plant community dynamics. Yet very few studies have experimentally addressed the individual, comb...
Since 1994, the state of Michigan has recognized a problem with bovine tuberculosis (TB), caused by Mycobacterium bovis, in wild white-tailed deer from a 12-county area in northeastern Lower Michigan. A total of 65,000 free-ranging deer have been tested, and 340 have been found to be positive for M. bovis. The disease has been found in other wildlife species, and, in 1998, in domestic cattle, w...
This paper reports data from a residential landscape preference study conducted in Delaware, USA. The researchers constructed an ecologically designed exurban residential landscape, which delivered 20 new environmental and human-related impacts, including 7 that delivered ecosystem services. Ecosystem services included impacts such as improved flood control and enhanced plant diversity. Using p...
Reconstructing the historical interplay of wildlife and pastoralists in African savannas is clouded contemporary studies by transformation subsistence societies land use changes. We draw on five decades monitoring Amboseli Conservation Program to illustrate rainfall–plant–herbivore linkages a free-ranging wildlife–livestock system transitioning savanna landscapes. In half century, coupled inter...
Vultures are a key component of an effective scavenger guild and have evolved number adaptations that allow them to locate dispose carcasses quickly efficiently. The continuing decline African vultures is threatening the stability guild, which may result in increased carcass decomposition times thus, more rapid development pathogenic bacteria. absence competitive regulation by these apex scaven...
Tuberculosis, caused by Mycobacterium bovis, was first diagnosed in African buffalo in South Africa's Kruger National Park in 1990. Over the past 15 years the disease has spread northwards leaving only the most northern buffalo herds unaffected. Evidence suggests that 10 other small and large mammalian species, including large predators, are spillover hosts. Wildlife tuberculosis has also been ...
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