Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1029/2020JG005754 |
| Evidence Is Growing That Alternative Stable States in Semiarid Grasslands Are the Exception, Not the Rule | |
| Kleinhesselink, Andrew | |
| 通讯作者 | Kleinhesselink, A |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| ISSN | 2169-8953 |
| EISSN | 2169-8961 |
| 出版年 | 2020 |
| 卷号 | 125期号:5 |
| 英文摘要 | Woody shrubs have increased in abundance in arid and semiarid grasslands around the globe. This can have negative consequences for communities dependent on grasses for grazing and other ecosystem services. A study by Zheng et al. (2020, ) shows that grasslands in Inner Mongolia, China, which have long been invaded by shrubs, may naturally return to a grass-dominated state when grazing is eliminated. This result emphasizes the primary importance of grazing in driving vegetation change in grasslands and argues against the existence of critical thresholds and alternative stable states in semiarid ecosystems. Plain Language Summary Over the past 100 years, woody shrubs have increased in abundance in many semiarid grasslands around the world, replacing the grasses that are the most valuable forage for livestock. Ecologists have long sought to understand if overgrazing is responsible for shrub invasion and if shrub-invaded areas can be restored back to grasslands. A new study by Zheng et al. (2020, https://doi.org/10.1029/2019JG005439) shows that reversing shrub invasion may be possible. Over a 20-year period, the authors compared areas where grazing was completely stopped to areas where grazing was continued in a shrub-invaded grassland in Inner Mongolia, China. In areas without grazing, grasses gradually increased and shrubs decreased over the study period; in contrast, shrubs remained dominant where grazing continued. As grasses increased, soil texture became finer and less water seeped into the deeper soil layers. This likely benefitted further growth of the shallow rooted grasses over the more deeply rooted shrubs. The result adds to a small number of studies showing that shrub invasion may be less permanent than originally thought |
| 英文关键词 | grassland shrub invasion grazing alternative stable states |
| 类型 | Editorial Material |
| 语种 | 英语 |
| 开放获取类型 | Bronze |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000537869800008 |
| WOS关键词 | THRESHOLDS ; ECOSYSTEM ; INFILTRATION ; LIVESTOCK ; RECOVERY ; WATER |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 来源机构 | University of California, Los Angeles |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/324643 |
| 作者单位 | [Kleinhesselink, Andrew] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90024 USA |
| 推荐引用方式 GB/T 7714 | Kleinhesselink, Andrew. Evidence Is Growing That Alternative Stable States in Semiarid Grasslands Are the Exception, Not the Rule[J]. University of California, Los Angeles,2020,125(5). |
| APA | Kleinhesselink, Andrew.(2020).Evidence Is Growing That Alternative Stable States in Semiarid Grasslands Are the Exception, Not the Rule.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(5). |
| MLA | Kleinhesselink, Andrew."Evidence Is Growing That Alternative Stable States in Semiarid Grasslands Are the Exception, Not the Rule".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.5(2020). |
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