نتایج جستجو برای: grazing unauthorized livestock

تعداد نتایج: 39687  

2005
Victoria A. saab

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. Among 35 plains species for which data are avail...

Drought and grazing rangelands play an important role in changing the structure of vegetation and losing the biodiversity of natural ecosystems. In this research, in order to determine the effects of drought and livestock grazing on the vegetation structure of rangelands located in the Nakhab Forest of South Khorasan Province, species abundance, biodiversity, and range condition and trend were ...

Grazing of Livestock is one of the factors having influence on the structure and dynamics of the range land vegetation. Grazing management is a vital factor to control the intensity of the rangeland ecosystems degradation. In this study, plant functional traits and diversity and richness properties were used to assess the vegetation response to different grazing intensities. This was done in No...

Journal: :Environmental science and pollution research international 2016
Richard Engeman Renate Cattaruzza Marco Cattaruzza Justin Fischer

Observations of wild boar damage to alpine grazing pastures in Romania's Carpathian Mountains were collected using photographs of the slopes from vantage points. We mapped the rooted areas and then used GIS software to estimate the relative proportions of the total grazing areas visible in the photographs that were damaged by wild boar. The amounts of damage from our two demonstration pastures ...

2013
Justin D. Derner

INTRODUCTION Vegetation and livestock responses from a 25 year (1982-2006) grazing system and stocking rate study in the northern mixed-grass prairie at the USDA-Agricultural Research Service, High Plains Grasslands Research Station near Cheyenne, Wyoming are presented here. This study was longest known grazing system X stocking rate study in North America and was one of the few studies to use ...

1998
L. B. MERRILL C. A. TAYLOR

Highlight: Preferences of white-tailed deer to various grazing management systems now being tested at the Texas A&M University Agricultural Research Station, Sonora, were evaluated on the basis of deer density and economic returns from hunting. Hunter success was evaluated on the basis of several factors. White-tailed deer definitely preferred a rangeland grazed under a system which included a ...

2007
Richard A. Gill

Human communities in the Intermountain West depend heavily on subalpine rangelands because of their importance in providing water for irrigation and forage for wildlife and livestock. In addition, many constituencies are looking to managed ecosystems to sequester carbon in plant biomass and soil C to reduce the impact of anthropogenic CO2 on climate. This work builds on a 90-year-old grazing ex...

Journal: :Environmental pollution 2002
J D Reeder G E Schuman

We evaluated the effects of livestock grazing on C content of the plant-soil system (to 60 cm) of two semi-arid grasslands: a mixed-grass prairie (grazed 12 years), and a short-grass steppe (grazed 56 years). Grazing treatments included season-long grazing at heavy and light stocking rates, and non-grazed exclosures. Significantly higher soil C (0-30cm) was measured in grazed pastures compared ...

2017
Karsten Wesche Vroni Retzer V. Retzer

This paper tests predictions derived from the non-equilibrium theory of rangeland science. Data were collected in livestock enclosures situated in the relatively moist desert steppes of the Gobi Gurvan Saykhan region of southern Mongolia from 2000 to 2003. Plant community composition and species’ richness in enclosures showed clear differences between years, but these were equally strong in ung...

2013
Anna C. Treydte

Livestock production is a key income source in eastern Africa, and 80% of 22 the total agricultural land is used for livestock herding. Hence, ecological and 23 socio-economically sustainable rangeland management is crucial. Our study aimed at 24 selecting operational economic, environmental and social sustainability indicators for three 25 main pastoral (P), agro-pastoral (AP), and landless in...

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