Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2001.0900 |
Presence/absence of a keystone species as an indicator of rangeland health | |
Krogh, SN; Zeisset, MS; Jackson, E; Whitford, WG | |
通讯作者 | Whitford, WG |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 2002 |
卷号 | 50期号:3页码:513-519 |
英文摘要 | We examined the relationship between a Chihuahuan Desert grassland keystone species (banner tailed kangaroo rat, Dipodomys spectabilis) and several vegetation and soil indicators of rangeland health in order to define a threshold indicator value for irreversible change in ecosystem structure and function. The abundance of occupied and/or abandoned D. spectabilis burrow-mounds was assessed at 117 sites in south-central New Mexico where previous studies had reported vegetation cover and composition. The most robust indicator for presence/absence of D. spectabilis was shrub cover. D. spectabilis did not occur at sites with shrub cover > 20%. It was concluded that a threshold value of 20% shrub cover could be applied to assessment and monitoring of Chihuahuan Desert rangelands because higher shrub cover results in the local extinction of this keystone species. The combination of data on the presence/absence of a keystone species with vegetation and soil indicators provides a method for identifying thresholds of degradation that may be irreversible. (C) 2002 Elsevier Science Ltd. |
英文关键词 | banner-tailed kangaroo rat Chihuahuan Desert desertification Dipodomys spectabilis environmental indicators degradation threshold |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000175055400011 |
WOS关键词 | TAILED KANGAROO RAT ; DIPODOMYS-SPECTABILIS ; DESERT ; DESERTIFICATION ; VEGETATION ; MOUNDS ; SOIL |
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/2XILL650/142947 |
作者单位 | (1)New Mexico State Univ, USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA;(2)New Mexico State Univ, Dept Geog, Las Cruces, NM 88003 USA;(3)New Mexico State Univ, Expt Stat Grad Program, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Krogh, SN,Zeisset, MS,Jackson, E,et al. Presence/absence of a keystone species as an indicator of rangeland health[J]. New Mexico State University,2002,50(3):513-519. |
APA | Krogh, SN,Zeisset, MS,Jackson, E,&Whitford, WG.(2002).Presence/absence of a keystone species as an indicator of rangeland health.JOURNAL OF ARID ENVIRONMENTS,50(3),513-519. |
MLA | Krogh, SN,et al."Presence/absence of a keystone species as an indicator of rangeland health".JOURNAL OF ARID ENVIRONMENTS 50.3(2002):513-519. |
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