Range Contractions of North American Carnivores and Ungulates
نویسندگان
چکیده
منابع مشابه
Range contractions of the world's large carnivores
The majority of the world's terrestrial large carnivores have undergone substantial range contractions and many of these species are currently threatened with extinction. However, there has been little effort to fully quantify the extent of large carnivore range contractions, which hinders our ability to understand the roles and relative drivers of such trends. Here we present and analyse a new...
متن کاملBabesiosis of wild carnivores and ungulates.
Although large and small piroplasms have been reported from various wild carnivore and ungulate species, relatively few have been named. In the past, mere presence of a piroplasm in a specific host frequently prompted naming of a new species. Descriptions were often inadequate or lacking altogether. Currently, demarcation of species relies heavily on molecular characterisation. Even serological...
متن کاملDemographic side effects of selective hunting in ungulates and carnivores.
Selective harvesting regimes are often implemented because age and sex classes contribute differently to population dynamics and hunters show preferences associated with body size and trophy value. We reviewed the literature on how such cropping regimes affect the demography of the remaining population (here termed demographic side effects). First, we examined the implications of removing a lar...
متن کاملRecent range expansion and divergence among North American Prairie Grouse.
Prairie grouse (genus: Tympanuchus) once existed throughout much of North America but have recently experienced significant population declines, isolation, and extinction. In previous molecular studies, contrasting patterns or an unresolved polytomy among Tympanuchus taxa (Tympanuchus phasianellus, Tympanuchus pallidicinctus, and Tympanuchus cupido) have resulted from traditional phylogenetic m...
متن کاملEcological correlates of geographical range occupancy in North American birds
Aim The degree to which a species is predictably encountered within its range varies tremendously across species. Understanding why some species occur less frequently within their range than others has important consequences for conservation and for analyses of ecological patterns based on range maps. We examined whether patterns in geographical range occupancy can be explained by species-level...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BioScience
سال: 2004
ISSN: 0006-3568
DOI: 10.1641/0006-3568(2004)054[0123:rconac]2.0.co;2