Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1560/IJPS.55.1.73 |
The application of remote sensing to study shrub-herbaceous relations at a high spatial resolution | |
Arnon, Amir I.1; Ungar, Eugene D.1; Svoray, Tal2; Shachak, Moshe3; Blankman, Joshua1; Perevolotsky, Avi1,3 | |
通讯作者 | Arnon, Amir I. |
来源期刊 | ISRAEL JOURNAL OF PLANT SCIENCES
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ISSN | 0792-9978 |
出版年 | 2007 |
卷号 | 55期号:1页码:73-82 |
英文摘要 | Ecosystems of mixed woody and herbaceous vegetation are under increasing pressure and threat from human activity and global climate changes. Many processes that shape these ecosystems remain poorly understood despite their large geographic extent, the services they provide, and their importance for wildlife and livestock. Some of these processes occur simultaneously on small and large scales; therefore their study requires methodologies that combine high spatial resolution with large spatial extent. In this study, we explored the phenomenon of rings -"circlets" -of relatively dense herbaceous biomass that seem to occur around patches of Sarcopoterium spinosum in the semiarid northern Negev. We developed a novel, non-destructive method to estimate herbaceous biomass at a high spatial resolution, over an area of 1500 m(2). Steps in the study process included: low-altitude aerial photography, image rectification, delineation of shrub patches, computation of herbaceous biomass in the intershrub area, and analysis of herbaceous biomass as a function of distance from the nearest shrub. Our results confirmed the existence of circlets, and we estimated their width to be approximately 10 cm. Herbaceous biomass at the peak of the green season was approximately 40% greater in the circlet than in the remainder of the intershrub area. Circlets are probably an important feature of the ecosystem; since they covered ca. 20% of the intershrub area, their contribution to primary (herbaceous) production at the ecosystem level, and, in turn, to secondary production, is substantial. We discuss possible mechanisms in the creation of circlets, as well as the possible implications of circlets for range management and improvement. |
英文关键词 | circlets islands of fertility motorized parachute Sarcopoterium spinosum semiarid rangelands |
类型 | Article |
语种 | 英语 |
国家 | Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000255321800009 |
WOS关键词 | PATCH STRUCTURE ; ARID ECOSYSTEMS ; FACILITATION ; RANGELAND ; DESERT ; INTERFERENCE ; RESILIENCE ; VEGETATION ; DYNAMICS ; STEPPE |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
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/2XILL650/154648 |
作者单位 | 1.Agr Res Org, Dept Agron & Nat Resources, Inst Plant Sci, Volcani Ctr, IL-50250 Bet Dagan, Israel; 2.Ben Gurion Univ Negev, Dept Geog & Environm Dev, IL-84105 Beer Sheva, Israel; 3.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, IL-84990 Sede Boqer, Israel |
推荐引用方式 GB/T 7714 | Arnon, Amir I.,Ungar, Eugene D.,Svoray, Tal,et al. The application of remote sensing to study shrub-herbaceous relations at a high spatial resolution[J]. Ben-Gurion University of the Negev,2007,55(1):73-82. |
APA | Arnon, Amir I.,Ungar, Eugene D.,Svoray, Tal,Shachak, Moshe,Blankman, Joshua,&Perevolotsky, Avi.(2007).The application of remote sensing to study shrub-herbaceous relations at a high spatial resolution.ISRAEL JOURNAL OF PLANT SCIENCES,55(1),73-82. |
MLA | Arnon, Amir I.,et al."The application of remote sensing to study shrub-herbaceous relations at a high spatial resolution".ISRAEL JOURNAL OF PLANT SCIENCES 55.1(2007):73-82. |
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