Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.ecolind.2018.06.032 |
Coupling structural and functional thresholds for vegetation changes on a Mongolian shrubland | |
Sasaki, Takehiro1; Koyama, Asuka2; Okuro, Toshiya2 | |
通讯作者 | Sasaki, Takehiro |
来源期刊 | ECOLOGICAL INDICATORS
![]() |
ISSN | 1470-160X |
EISSN | 1872-7034 |
出版年 | 2018 |
卷号 | 93页码:1264-1275 |
英文摘要 | The concept of an ecological threshold has spurred important advances in understanding the nonlinear responses of ecosystems to various disturbances. Yet integrated evaluations of an ecosystem’s structural threshold and functional threshold are rare, and we know little about linkages between observed nonlinear changes in ecosystem structure along disturbance gradients and the associated changes in system feedbacks. We applied a two-step approach to perform integrated evaluations of structural and functional thresholds in a Mongolian shrub land. First, by using 6 years of data from plant communities along a gradient of grazing intensity, we identified the structural threshold in the changes in shrub cover along the gradient. We then identified the functional threshold at which wind erosion rates were accelerated due to sufficient decline in shrub cover. We found that shrub cover changed abruptly along the grazing gradient, indicating the presence of a structural threshold. Shrub cover decreased gradually along the grazing gradient to the threshold of 6.9%; thereafter it decreased rapidly. This level of shrub cover was close to that of the functional threshold (5.3%), namely the point at which the rate of wind erosion was accelerated. Our key finding is the coupling of structural and functional thresholds, suggesting that the modification of feedbacks between wind erosion and shrub cover might be associated with the nonlinear response of ecosystem structure to grazing. To bridge the gap between management applications and ecological threshold theory, it is essential to understand the potential feedback mechanisms that would contribute to nonlinear changes in ecosystem structure. |
英文关键词 | Arid and semi-arid rangelands Caragana microphylla Ecological threshold Mongolia Piecewise linear model Positive feedback Wind erosion |
类型 | Article |
语种 | 英语 |
国家 | Japan |
收录类别 | SCI-E |
WOS记录号 | WOS:000452692600124 |
WOS关键词 | ECOLOGICAL THRESHOLDS ; ECOSYSTEM MANAGEMENT ; ALTERNATIVE STATES ; GRAZING GRADIENTS ; REGIME SHIFTS ; RESILIENCE ; EROSION ; SOIL ; PRODUCTIVITY ; INTENSITY |
WOS类目 | Biodiversity Conservation ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208742 |
作者单位 | 1.Yokohama Natl Univ, Grad Sch Environm & Informat Sci, 79-7 Tokiwadai, Yokohama, Kanagawa 2408501, Japan; 2.Univ Tokyo, Grad Sch Agr & Life Sci, Bunkyo Ku, 1-1-1 Yayoi, Tokyo 1138657, Japan |
推荐引用方式 GB/T 7714 | Sasaki, Takehiro,Koyama, Asuka,Okuro, Toshiya. Coupling structural and functional thresholds for vegetation changes on a Mongolian shrubland[J],2018,93:1264-1275. |
APA | Sasaki, Takehiro,Koyama, Asuka,&Okuro, Toshiya.(2018).Coupling structural and functional thresholds for vegetation changes on a Mongolian shrubland.ECOLOGICAL INDICATORS,93,1264-1275. |
MLA | Sasaki, Takehiro,et al."Coupling structural and functional thresholds for vegetation changes on a Mongolian shrubland".ECOLOGICAL INDICATORS 93(2018):1264-1275. |
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。