Water Shortage Drives Interactions Between Cushion and Beneficiary Species Along Elevation Gradients in Dry Himalayas
文献类型：期刊论文
| 作者 | Ale, Rita4; Zhang, Lin; Li, Xiang4; Raskoti, Bhakta Bahadur1; Pugnaire, Francisco I.; Luo, Tianxiang |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2018 |
| 卷号 | 123期号:1页码:226-238 |
| 关键词 | alpine plants carbon isotope interaction intensity satellite vegetation index stress gradient hypothesis water availability |
| ISSN号 | 2169-8953 |
| DOI | 10.1002/2017JG004365 |
| 文献子类 | Article |
| 英文摘要 | It is challenging to understand the drivers of plant-plant interaction patterns in dry mountains. However, such knowledge is important to assess alpine ecosystem resilience to climate change. In water-limited ecosystems, leaf C-13 and satellite-derived vegetation index (NDVI) may serve as reliable indicators of environmental severity to address plant responses to water availability. We hypothesized that in dry mountains, interaction intensity between cushion and beneficiary species increases with increasing C-13 and decreasing NDVI regardless of elevation, indicating the importance of water availability in driving plant interactions. We used relative interaction indices (RII) of species and individual numbers within and outside the canopy of three cushion plant species along three elevational transects in dry Himalayas, Nepal. Site-specific NDVI was calculated from 30m Landsat images. Thornthwaite moisture index was calculated for each elevation site. We observed nonlinear patterns in RII, C-13, and NDVI with elevation. Intraspecific variation of C-13 was negatively correlated with moisture index and NDVI, while NDVI across sites was positively correlated with precipitation but not with temperature. RII within a cushion species was positively correlated with C-13 and negatively with NDVI when the effect of elevation was removed. In pooled data across cushion species and sites, RII was negatively correlated with precipitation and NDVI when the effect of temperature was removed. RII was uncorrelated with cushion size under the same environment. Leaf nitrogen showed no correlation with RII or C-13. Our data show that water shortage is the main driver of plant interactions in the alpine belt of dry Himalayas. |
| 学科主题 | Environmental Sciences ; Geosciences, Multidisciplinary |
| 出版地 | WASHINGTON |
| 电子版国际标准刊号 | 2169-8961 |
| WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; PLANT-PLANT INTERACTIONS ; POSITIVE ASSOCIATIONS ; ALTITUDINAL GRADIENTS ; ABIOTIC STRESS ; PRECIPITATION ; DELTA-C-13 ; COMMUNITY ; NDVI ; FACILITATION |
| 语种 | 英语 |
| WOS记录号 | WOS:000425517800017 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41571046, 31170451] ; Strategic Priority Research Program (B) of the Chinese Academy of SciencesChinese Academy of Sciences [XDB03030402] ; CAS-TWAS fellowship |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/20618]  |
| 专题 | 植物研究所_系统与进化植物学研究中心_系统与进化植物学研究中心_学位论文 |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 2.Pugnaire, Francisco I.] CSIC, Estn Expt Zonas Aridas, Almeria, Spain 3.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ale, Rita,Zhang, Lin,Li, Xiang,et al. Water Shortage Drives Interactions Between Cushion and Beneficiary Species Along Elevation Gradients in Dry Himalayas[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2018,123(1):226-238. |
| APA | Ale, Rita,Zhang, Lin,Li, Xiang,Raskoti, Bhakta Bahadur,Pugnaire, Francisco I.,&Luo, Tianxiang.(2018).Water Shortage Drives Interactions Between Cushion and Beneficiary Species Along Elevation Gradients in Dry Himalayas.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,123(1),226-238. |
| MLA | Ale, Rita,et al."Water Shortage Drives Interactions Between Cushion and Beneficiary Species Along Elevation Gradients in Dry Himalayas".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 123.1(2018):226-238. |
入库方式： OAI收割
来源：植物研究所
浏览0
下载0
收藏0
其他版本
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。