نتایج جستجو برای: grazed area

تعداد نتایج: 585950  

2008
Lance T. Vermeire Rodney K. Heitschmidt Marshall R. Haferkamp

Grazing systems may alter botanical composition and productivity of grasslands through differential use in time, space, or intensity. Seven simulated grazing treatments were applied six years in eastern Montana, USA to determine effects on plant community composition and standing crop. Treatments were moderate stocking (28.8 AUD ha 1 year ) of cattle using 3-pasture summer rotation, season-long...

2013
Hui Zhang Benjamin Gilbert Wenbin Wang Junjie Liu Shurong Zhou

Grazing is one of the most important factors influencing community structure and productivity in natural grasslands. Understanding why and how grazing pressure changes species diversity is essential for the preservation and restoration of biodiversity in grasslands. We use heavily grazed subalpine meadows in the Qinghai-Tibetan Plateau to test the hypothesis that grazer exclusion alters plant d...

2014
Jay Ruffell Raphael K. Didham Paul Barrett Nic Gorman Rhonda Pike Andrée Hickey-Elliott Karin Sievwright Doug P. Armstrong

Forest edges can strongly affect avian nest success by altering nest predation rates, but this relationship is inconsistent and context dependent. There is a need for researchers to improve the predictability of edge effects on nest predation rates by examining the mechanisms driving their occurrence and variability. In this study, we examined how the capture rates of ship rats, an invasive nes...

Journal: :Northern Journal of Applied Forestry 1998

Journal: :Animal Conservation 2022

In Europe, Natura 2000 sites should protect threatened target species and networks of habitats. The management grasslands is often financed by subsidized grazing as part the Common Agricultural Policy (CAP). We studied extent CAP for how this affects a butterfly (the marsh fritillary) floral resources. Based on extensive capture-mark-release studies from 2 years in >550 ha grid cells 225 km2 la...

2001
CHRISTOPHER B. GOGUEN NANCY E. MATHEWS

The Brown-headed Cowbird (Molothrus ater) is a widespread brood parasite which often engages in a commensalistic feeding relationship with domestic livestock. We studied the behavior of female cowbirds breeding in pinyon–juniper woodlands in New Mexico, USA, on two adjacent sites, one an active cattle ranch, and the other a site that was not grazed by domestic livestock throughout the songbird ...

Journal: :Proceedings of the New Zealand Grassland Association 1985

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