Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/S0140-1963(02)00251-3 |
Soil microtopography on grazing gradients in Chihuahuan desert grasslands | |
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 | 2003 |
卷号 | 55期号:1页码:181-192 |
英文摘要 | The significant impacts of livestock in the creation of piospheres centered on water points is the loss of soil microtopography across a ’landscape’ that has been influenced by many years of livestock grazing. The size, height, and spatial distribution of micromounds and surrounding depressions were measured by a modified erosion bridge at three distances (50, 450, and 1050 m) from water points in desert grassland pastures in the Jornada Basin, New Mexico, USA. Plots at 50 m had fewer micromounds and the mounds were smaller than those recorded on the more distant plots. Microtopography of plots at 450 m from water was not significantly different from that recorded at 50 m. Microtopography of plots that were 1050 m from water points was significantly different from that of plots nearer water points. Strong correlation between microtopography and the cover of long-lived perennial grasses (R-2 = 91%) was found, such dependence could be used for assessing the trend in organic matter content that is in concordance with that of microtopography. Loss of microtopography from the impact of livestock in piospheres exacerbates erosion processes and contributes to desertification. (C) 2003 Elsevier Science Ltd. All rights reserved. |
英文关键词 | desertification grazing gradients microtopography piosphere |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000183654000013 |
WOS关键词 | CHENOPOD SHRUBLAND ; VEGETATION ; SURFACE ; COMMUNITIES ; PIOSPHERE ; AUSTRALIA ; PATTERNS ; COVER ; SHEEP |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/145000 |
作者单位 | (1)US EPA, Div Environm Sci, Las Vegas, NV 89193 USA;(2)New Mexico State Univ, USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA;(3)New Mexico State Univ, MSC MAP, Dept Geog, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Nash, MS,Jackson, E,Whitford, WG. Soil microtopography on grazing gradients in Chihuahuan desert grasslands[J]. New Mexico State University,2003,55(1):181-192. |
APA | Nash, MS,Jackson, E,&Whitford, WG.(2003).Soil microtopography on grazing gradients in Chihuahuan desert grasslands.JOURNAL OF ARID ENVIRONMENTS,55(1),181-192. |
MLA | Nash, MS,et al."Soil microtopography on grazing gradients in Chihuahuan desert grasslands".JOURNAL OF ARID ENVIRONMENTS 55.1(2003):181-192. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。