Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S0140-1963(03)00062-4 |
Effects of intense, short-duration grazing on microtopography in a Chihuahuan Desert grassland | |
Nash, MS; Jackson, E; Whitford, WG | |
通讯作者 | Nash, MS |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 2004 |
卷号 | 56期号:3页码:383-393 |
英文摘要 | We studied the effect of three consecutive years of short duration (< 48 h per year), and intense grazing (20-40 yearling cows per hectare) on soil surface microtopography in a Chihuhuan Desert grassland. We also studied the effects of shrub removal plus grazing on microtopography. Microtopography was measured in 18 plots (treatments). Treatments were a combination of two factors: (1) three levels of grazing (winter-grazed, summer-grazed, and not grazed), and (2) two levels of habitat structure (shrubs-removed and shrubs-intact). Mesquite (Prosopis glandulosa) shrubs were removed from half of the plots (nine out of 18 plots). The average height of the micromounds, the average depths of intermound depressions, and the number of micromounds were significantly reduced on the grazed plots. Shrub removal had no significant effect on the height of the micromounds or the depth of the intermound depressions of ungrazed plots. There were significant differences in average micromound heights and intermound microdepression depths attributable to the season of grazing. Microtopography was significantly reduced on grazed plots from which shrubs were removed, compared to ungrazed plots, and grazed plots with shrubs present. Grass canopy reduction, and destruction of the micromound structure in a short duration, plus intense grazing results in erosion of micromounds and in-filling of intermound depressions. The loss of microtopography coupled with reduction in vegetation height and cover resulting from short-duration intense grazing by cattle exposed soils to an increased risk of soil erosion Destruction of the micromound/microdepression topography by cattle changes the spatial patterns of water infiltration, and may homogenize nutrients in desert grasslands. (C) 2003 Published by Elsevier Science Ltd. |
英文关键词 | cattle wind erosion grazing hoof-action microtopography index micromounds microdepressions |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000187882600001 |
WOS关键词 | VEGETATION ; WIND |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | New Mexico State University ; Desert Research Institute |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/147154 |
作者单位 | (1)US EPA, Div Environm Sci, Las Vegas, NV 89193 USA;(2)Desert Res Inst, Las Vegas, NV 89119 USA;(3)New Mexico State Univ, Dept Geog, MSC MAP, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Nash, MS,Jackson, E,Whitford, WG. Effects of intense, short-duration grazing on microtopography in a Chihuahuan Desert grassland[J]. New Mexico State University, Desert Research Institute,2004,56(3):383-393. |
APA | Nash, MS,Jackson, E,&Whitford, WG.(2004).Effects of intense, short-duration grazing on microtopography in a Chihuahuan Desert grassland.JOURNAL OF ARID ENVIRONMENTS,56(3),383-393. |
MLA | Nash, MS,et al."Effects of intense, short-duration grazing on microtopography in a Chihuahuan Desert grassland".JOURNAL OF ARID ENVIRONMENTS 56.3(2004):383-393. |
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