Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2007.03.009 |
Livestock, soil compaction and water infiltration rate: Evaluating a potential desertification recovery mechanism | |
Castellano, M. J.; Valone, T. J. | |
通讯作者 | Castellano, M. J. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2007 |
卷号 | 71期号:1页码:97-108 |
英文摘要 | Models predict that desertification, the loss of perennial grasses in and and semiarid environments, will be difficult to reverse due to the positive feedback between plant cover and water infiltration; reductions in plant cover concurrently reduce water infiltration to a level that is insufficient for grass growth and recruitment. Thus, a desertified state becomes stable. However, these models cannot account for recently reported perennial grass recovery in desertified habitats. Here, we suggest a novel mechanism to explain these observations: the natural increase in water infiltration rate associated with recovery from livestock-induced soil compaction. We empirically evaluate this mechanism by comparing vegetation, water infiltration rates and soil compaction at three nearby, desertified livestock exclosures that differ in time since livestock removal and perennial grass recovery; the oldest exclosure (54 years) has experienced a significant increase in perennial grasses, while there has been no such increase at the two younger exclosures (25 and 10 years). Across sites, relative differences (inside compared to outside) in water infiltration rate and soil compaction increased across each grazing fence with time since livestock removal. The relative difference in soil compaction and relative difference in water infiltration rate were significantly greatest at the sole exclosure in which perennial grasses have recovered. These data support a key aspect of desertification models: the importance of water infiltration rate for resilience of vegetation in desertified systems. Although water infiltration rate plays a critical role in understanding the stability of desertified systems, theoretical models of desertification have only incorporated plant cover as the key mechanism affecting infiltration rate. Our work suggests soil compaction may also be an important mechanism. (c) 2007 Elsevier Ltd. All rights reserved. |
英文关键词 | arid grassland grazing hoof action perennial grass resilience restoration woody encroachment |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000248406800007 |
WOS关键词 | SEMIARID GRAZING SYSTEMS ; IRREVERSIBLE VEGETATION CHANGE ; EDWARDS-PLATEAU ; ARID ECOSYSTEMS ; STABLE STATES ; NEW-MEXICO ; LAND-USE ; GRASSLANDS ; RESPONSES ; RESILIENCE |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/154825 |
作者单位 | (1)St Louis Univ, Dept Biol, St Louis, MO 63103 USA |
推荐引用方式 GB/T 7714 | Castellano, M. J.,Valone, T. J.. Livestock, soil compaction and water infiltration rate: Evaluating a potential desertification recovery mechanism[J],2007,71(1):97-108. |
APA | Castellano, M. J.,&Valone, T. J..(2007).Livestock, soil compaction and water infiltration rate: Evaluating a potential desertification recovery mechanism.JOURNAL OF ARID ENVIRONMENTS,71(1),97-108. |
MLA | Castellano, M. J.,et al."Livestock, soil compaction and water infiltration rate: Evaluating a potential desertification recovery mechanism".JOURNAL OF ARID ENVIRONMENTS 71.1(2007):97-108. |
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