The Influence of Landscape Scale on the Management of Desert Bighorn Sheep

Krausman, Paul R.

doi:10.1007/978-1-4612-1918-7_14

Cited by 5 publications

(7 citation statements)

References 24 publications

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“…Clearly, population size and climatic variability are important components in the persistence of these unique ungulates in desert ecosystems (Bleich etal 1996;Krausman 1997;Schwartz et al 1986). Although considerable differences of opinion exist over the role of precipitation in the persistence of populations of mountain sheep (Berger 1990(Berger , 1999Wehausen 1999), we believe both the amount and timing of precipitation, and the relative relationships of populations to K (Douglas and Leslie 1986) must be considered to resolve this important issue.…”

Section: Discussionmentioning

confidence: 93%

“…3. -Relationship between age and size of 95% adaptive-kernel home range for radiocollared female mountain sheep from the Panamint Range, Inyo Co., California, USA (n = 13;1995-1997, and Old Dad Peak, San Bernardino Co., California, USA (n = 15;.…”

Section: Age (Years)mentioning

confidence: 99%

“…We hypothesize that pattern and amount of precipitation, and subsequent productivity of plants, affect the distribution of mountain sheep, and ultimately probabilities of persistence for populations of these mountain ungulates. Co., California, (1948, Furnace Creek-Greenland Ranch, Inyo Co., California, (1948California, ( -1989, Baker, San Bernardino Co., California, USA (1983, and the Panamint Range, Inyo Co., California, USA (1995-1997. Asterisks adjacent to months (letters) indicate that mean precipitation was greater for that area (*P < 0.05, **P < 0.01, ***P < 0.001).…”

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confidence: 99%

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Home ranges of female mountain sheep, Ovis canadensis nelsoni: effects of precipitation in a desert ecosystem

Oehler¹,

Bowyer²,

Bleich³

2003

Mamm

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KEYWORDSCalifornia, home range, forage, mountain sheep, Ovis canadensis nelsmi population persistence, precipitation. SUMMARYWe compared sizes of home ranges and other ecological variables for female mountain sheep (Ovis canadensis nelsoni) inhabiting climatologically distinct areas in the Mojave Desert, California, USA. We also examined the relationship between size of home range and body size and age of mountain sheep. The pattern of precipitation was uni-modal in the more xeric Panamint Range, and bimodal at Old Dad Peak. Density of female sheep was about four times greater at Old Dad Peak than in the Panamint Range; Old Dad Peak also had more shrubs and perennial grasses than the Panamint Range. Home ranges and core areas were nearly twice as large in the Panamint Range than at Old Dad Peak, and females at Old Dad Peak were consistently nearer water. We detected no relationships between size of body or age and size of home-ranges for female mountain sheep. Females at Old Dad Peak foraged predominantly on perennial grasses and forbs, whereas those in the more xeric Panamint Range consumed mostly shrubs, perennial forbs, and succulents. In general, quality of forage was higher at Old Dad Peak than in the Panamint Range. Fecal nitrogen did not differ between areas in spring, but was higher in the Panamint Range during summer and autumn. We conclude that mountain sheep from the Panamint Range MAMMALIA, t. 67, n° 3 · 2003 · 385-401 385 Brought to you by | University of Georgia Libraries Authenticated Download Date | 5/28/15 6:47 PMOehlerM.W. et ai had larger home ranges because of lower availability and quality of forage, ostensibly a consequence ofthat precipitation regime. Use of cacti by mountain sheep in the Panamint Range likely enhanced the ability of females to increase the area in which they foraged in that depauperate and xeric environment. We hypothesize that pattern and amount of precipitation, and subsequent productivity of plants, affect the distribution of mountain sheep, and ultimately probabilities of persistence for populations of these mountain ungulates. RESUMELes dimensions des domaines des femelies de mouflons de montagne habitant des zones climatiques distinctes du desert Mohave (Californie, USA) ont ete comparees, ainsi que les relations entre la taille des territoires et le poids et Tage des animaux. Le patron de precipitations est unimodal dans la zone la plus seche, Panamint Range, et bimodal ä Old Dad Peak oil la densitc des femelles est environ quatre fois plus elevee. Cette derniere zone se caracterise egalement par une plus forte proportion de buissons et d'herbes vivaces et une meilleure qualite de fourrage. Les domaines et aires centrales de Panamint Range sont deux fois plus grands que ceux de Old Dad Peak oil les femelles sont nettement plus proches de l'eau. Aucune relation n'a pu etre mise en evidence entre la taille du corps ou Tage et les dimensions du domaine des mouflons femelles. Les femelles de Old Dad Peak se nourrissent surtout d'herbes vivaces et de forbs, tandis que ce...

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Section: Discussionmentioning

confidence: 93%

Section: Age (Years)mentioning

confidence: 99%

mentioning

confidence: 99%

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Home ranges of female mountain sheep, Ovis canadensis nelsoni: effects of precipitation in a desert ecosystem

Oehler¹,

Bowyer²,

Bleich³

2003

Mamm

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“…As a result, mountain sheep may be able to exploit areas previously unavailable to them and the resultant increases in overall numbers potentially enhance population persistence. Moreover, the metapopulation structure exhibited by mountain sheep (Bleich et al, 1990Epps et al, 2007;Krausman, 1997;Schwartz et al, 1986) may be positively affected by increases in availability of suitable habitat because an individual (or individuals) emigrating from a mountain range to an unfamiliar area will encounter a resource that enhances the probability of survival and, thereby, potentially increases individual fitness. Similarly, mountain sheep traveling between ranges are more apt to encounter conspecifics, thereby enhancing the probability of genetic exchange among populations.…”

Section: Discussionmentioning

confidence: 99%

Habitat use by a desert ungulate: Predicting effects of water availability on mountain sheep

Bleich

Marshal

Andrew

2010

Journal of Arid Environments

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“…Managing wide-ranging carnivores at the landscape scale is an intuitively logical concept (Harris, 1984;Entwistle & Dunstone, 2000;Storch & Bissonette, 2003), but the application of landscape principles in their conservation is a greater challenge and is seldom attempted (Krausman, 1997). Whereas the high cost of land acquisition or conservation easements might be ultimate obstacles to managing a black bear metapopulation in Florida, a vision of interconnected populations must begin with a blueprint.…”

Section: Management Recommendationsmentioning

confidence: 97%

Landscape linkages and conservation planning for the black bear in west‐central Florida

Larkin

Maehr

Hoctor

et al. 2004

Animal Conservation

120

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The Greater Chassahowitzka black bear population is the smallest documented in North America with fewer than 20 individuals. Its future depends on landscape linkages with other bear populations that are separated by denatured habitat. We used a Geographic Information System (GIS) to identify potential landscape linkages between this isolated population and six others in Florida. Pathway lengths ranged from 60-194 km with varying potentials for facilitating black bear dispersal. Each pathway incorporated 35-88% conservation land and encountered at least 11 dispersal bottlenecks. Even pathways that incorporated extensive conservation land encountered bottlenecks that make these linkages potentially unviable. All six pathways, however, passed through ≥ 95% core black bear habitat. Thus, the infrastructure for a conservation network is still largely intact. The Suwannee pathway provides the best opportunity to restore connectivity between the Greater Chassahowitzka Ecosystem (GCE) and a southward colonising bear population in the Big Bend region. However, intensification of development poses an immediate threat to maintaining connectivity between the GCE and other bear populations in Florida. Through immediate strategic planning and active conservation and restoration measures, many of the generated pathways can provide long-term connectivity. Least-cost path analyses can aid in the conservation of wide-ranging animals by providing managers with a science-based, empirically derived blueprint of potential landscape linkages.

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The Influence of Landscape Scale on the Management of Desert Bighorn Sheep

Cited by 5 publications

References 24 publications

Home ranges of female mountain sheep, Ovis canadensis nelsoni: effects of precipitation in a desert ecosystem

Home ranges of female mountain sheep, Ovis canadensis nelsoni: effects of precipitation in a desert ecosystem

Habitat use by a desert ungulate: Predicting effects of water availability on mountain sheep

Landscape linkages and conservation planning for the black bear in west‐central Florida

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