Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/eco.1806 |
Shifts in landscape ecohydrological structural-functional relationship driven by experimental manipulations and ecological interactions | |
Hoffman, Oren; Yizhaq, Hezi; Boeken, Bertrand | |
通讯作者 | Boeken, Bertrand |
来源期刊 | ECOHYDROLOGY |
ISSN | 1936-0584 |
EISSN | 1936-0592 |
出版年 | 2017 |
卷号 | 10期号:3 |
英文摘要 | Vegetation structure and patchiness are central controllers of ecohydrological function in semiarid regions. The feedback interactions between vegetation patchiness and water redistribution make semiarid ecosystems sensitive to state-shifts, where nonlinearities appear in the structure-function correlations. Hydrological connectivity of runoff sources is functionally important for source-sink interactions over a range of spatial scales and plays a key role in ecosystem state-shifts. Accordingly, the study of the functional responses of ecosystems to changes in connectivity is important for assessing the system’s resilience in response to drivers of degradation. We used runoff data collected over 18 years in experimentally manipulated plots to study both the primary functional response to the manipulations and the changes in both structure and function over two decades. By comparing simultaneous changes in woody and herbaceous cover, biocrust cover and connectivity, and runoff yield, we examined the interactions among the different cover classes and assessed the functional consequences of these interactions. The manipulated changes in vegetation and biocrust cover caused large differences in runoff yields, with positive correlation between biocrust cover and runoff. However, changes in vegetation patterns reduced these differences, as the spread of herbaceous plant cover, at the expense of biocrust and woody cover, caused a shift in the cover-runoff relationship. The landscape was resilient to degradation due to rapid shrub growth in locations of high biocrust cover. On the other hand, a positive feedback of herbaceous plant cover replacing shrub cover caused a state-shift, likely driven by a combination of drought recurrence and cessation of grazing. |
英文关键词 | biocrust functional connectivity long-term study overland runoff semiarid rangeland state shift vegetation patterns |
类型 | Article |
语种 | 英语 |
国家 | Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000403067900005 |
WOS关键词 | BIOLOGICAL SOIL CRUSTS ; SEMIARID RANGELAND ; VEGETATION STRUCTURE ; NEGEV DESERT ; ECOSYSTEM ; SHRUBLAND ; RAINFALL ; ISRAEL ; DESERTIFICATION ; PRODUCTIVITY |
WOS类目 | Ecology ; Environmental Sciences ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
来源机构 | Ben-Gurion University of the Negev |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198391 |
作者单位 | Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, IL-8499000 Beer Sheva, Israel |
推荐引用方式 GB/T 7714 | Hoffman, Oren,Yizhaq, Hezi,Boeken, Bertrand. Shifts in landscape ecohydrological structural-functional relationship driven by experimental manipulations and ecological interactions[J]. Ben-Gurion University of the Negev,2017,10(3). |
APA | Hoffman, Oren,Yizhaq, Hezi,&Boeken, Bertrand.(2017).Shifts in landscape ecohydrological structural-functional relationship driven by experimental manipulations and ecological interactions.ECOHYDROLOGY,10(3). |
MLA | Hoffman, Oren,et al."Shifts in landscape ecohydrological structural-functional relationship driven by experimental manipulations and ecological interactions".ECOHYDROLOGY 10.3(2017). |
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。