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Keyword: livestock

Viewpoint: needed research on domestic and recreational livestock in wilderness

Publications Posted on: June 26, 2006
The issue of domestic livestock grazing will become more controversial as wilderness areas managed by the Bureau of Land Management are added to the system. Many of these areas are likely to have little recreational use, leaving livestock grazing as the most serious potential threat to wilderness values.

Black bear abundance, habitat use, and food habits in the Sierra San Luis, Sonora, Mexico

Publications Posted on: June 12, 2006
We studied black bears to determine habitat use, food habits, and abundance between April 2002 and November 2003 in the Sierra San Luis, Sonora. We utilized transects to determine spoor presence, camera traps for abundance, and scat analysis. During 2002, bears fed principally on plant material, and for 2003 on animal matter, namely livestock. Habitat use differed between years and seasons.

Rangeland degradation and restoration in the "desert seas": social and economic drivers of ecological change between the Sky Islands

Publications Posted on: June 12, 2006
The relative importance of different factors in driving ecological change in the valleys of southeastern Arizona and southwestern New Mexico has been debated for decades. Clearly, both anthropogenic and natural drivers have played roles: the focus should be on their interactions over time. I suggest that historically, debt and government policies interacted with periodic drought to cause degradation related to livestock.

Hydrology, ecology, and management of riparian areas in the Madrean Archipelago

Publications Posted on: June 09, 2006
Riparian areas in the Madrean Archipelago have historically provided water necessary for people, livestock, and agricultural crops. European settlers were attracted to these areas in the 1880s, where they enjoyed shade and forage for themselves and their livestock and existed on the readily available wildlife and fish. Trees growing along stream banks were harvested for fuel, poles, and building materials.

The Research Ranch: what do you do with a grassland besides raise cows?

Publications Posted on: June 09, 2006
For most of the past 10,000 years, semi-arid grasslands of Southeastern Arizona have not been heavily impacted by large herds of hoofed animals. This began to change in the 1500s with the introduction of domestic livestock, primarily cattle. Impacts of this major ecological force on a native system were widespread.

Landscape-level impacts of livestock on the diversity of a desert grassland: preliminary results from long-term experimental studies

Publications Posted on: June 09, 2006
This work is undertaken as a portion of long-term large-scale studies developed to determine how climate and disturbance (primarily fire and grazing) interact to structure desert grasslands. The results presented here are the initial grazing portions of the study.

Effects of livestock grazing on neotropical migratory landbirds in western North America

Publications Posted on: May 17, 2006
Livestock grazing is a widespread and important influence on neotropical migratory birds in four major ecosystems in western North America: grasslands of the Great Plains and Southwest, riparian woodlands, Intermountain shrubsteppe, and open coniferous forests. We have reviewed available literature on avian responses to grazing in these habitats.

Quality of water for livestock in man-made impoundments in the northern High Plains

Publications Posted on: April 27, 2006
Twenty-seven water quality parameters were measured in coal surface mine impoundments, bentonite surface mine impoundments, and livestock ponds in the Northern High Plains. Most impoundments were safe for use as a source for livestock drinking water. Eight water quality parameters were different (a

Wooded draws in rangelands of the northern Great Plains

Publications Posted on: April 27, 2006
Wooded draws and natural prairie woodlands occupy about 1.1 percent of the northern Great Plains. While the extent of wooded draws is extremely limited, their importance and value is much greater. These unique communities are important for wildlife and livestock habitats, soil stabilization, watershed maintenance, firewood, esthetics, and species diversity (Fig. 1).

Improving livestock management in wilderness

Publications Posted on: February 24, 2006