Shrub patches capture tumble plants: potential evidence for a self-reinforcing pattern in a semiarid shrub encroached grassland
文献类型：期刊论文
| 作者 | Yan, Yuchun3; Xu, Dawei3; Xu, Xingliang2 ; Wang, Deli4; Wang, Xu3; Cai, Yurong3; Chen, Jinqiang3; Xin, Xiaoping3; Eldridge, David J.1
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| 刊名 | PLANT AND SOIL
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| 出版日期 | 2019-09-01 |
| 卷号 | 442期号:1-2页码:311-321 |
| 关键词 | Fertile island Shrub Temperate grassland Tumble plants Encroachment |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-019-04189-5 |
| 通讯作者 | Yan, Yuchun(yanyuchun@caas.cn) ; Xin, Xiaoping(xinxiaoping@caas.cn) |
| 英文摘要 | Background and aims The development of fertile patches within an infertile matrix is a common phenomenon in drylands. Shrub-centered expansion of fertile islands is generally attributed to processes of sediment erosion and deposition, but there have been fewer studies of how litter might contribute to the development of fertile islands in semiarid shrub grassland. Methods We quantified the capture of two tumble plant species (Cleistogenes squarrosa, Salsola collina; also known as tumble weeds) by shrubs across ten sites across 38,000 km(2) of a semiarid grassland encroached by Caragana microphylla. Results Tumble plants are plants that blow across the grassland propelled by strong winds. Both tumble plant species were found over extensive areas of semiarid grassland, and their distribution coincides with the distribution of Caragana microphylla. Biomass production of both tumble plants averaged 12.2 g m(-2) (range: 1.0 to 25.0 g m(-2)) and litter accumulation (amount accruing from wind-blown plants) of both tumble plants was significantly greater beneath shrubs (94.5 +/- 28.9 g m(-2) mean +/- SE) than in the interspaces (3.3 +/- 1.4 g m(-2)). Most of the material collecting under Caragana microphylla comprised tumble plants. Increases in the area of Caragana microphylla patches did not correspond to greater tumble plant capture. However, the supply of tumble plants was the strongest predictor of capture within shrub hummocks, suggesting that tumble plant capture is source limited rather than sink limited. Our structural equation model indicates that increases in grass cover and height were indirectly and negatively associated with tumble plant capture by reducing the tumble plant supply. Contrary to prediction, shrub height and shrub patch area had no overall effect on the tumble plant capture. Conclusions Overall, we maintain that the capture of tumble plants by shrubs is an important self-maintaining mechanism of shrub-encroached grasslands. Tumble plant abundance is predicted to increase with increasing surface human disturbance and aridity. Therefore, the "shrub-litter island" effect is likely to be an important mechanism for maintaining and promoting the encroachment of shrubs into semiarid grasslands. |
| WOS关键词 | INNER-MONGOLIA ; SEED DISPERSAL ; LITTER ; VEGETATION ; ECOSYSTEM ; ORGANIZATION ; TEMPERATURE ; DYNAMICS ; RUNOFF ; CARBON |
| 资助项目 | National Natural Science Foundation of China[41671044] ; National Key Research and Development Program of China[2016YFC0500603] ; National Key Research and Development Program of China[2017YFE0104500] ; Fundamental Research Funds for Central Nonprofit Scientific Institution[931-8] ; Special Funding for the Modern Agricultural Technology System of the Chinese Ministry of Agriculture |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000485324700021 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; Fundamental Research Funds for Central Nonprofit Scientific Institution ; Special Funding for the Modern Agricultural Technology System of the Chinese Ministry of Agriculture |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/69663]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Yuchun; Xin, Xiaoping |
| 作者单位 | 1.Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW 2052, Australia 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China 3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, 12 Zhonguancun South St, Beijing 100081, Peoples R China 4.Northeast Normal Univ, Inst Grassland Sci, Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Yuchun,Xu, Dawei,Xu, Xingliang,et al. Shrub patches capture tumble plants: potential evidence for a self-reinforcing pattern in a semiarid shrub encroached grassland[J]. PLANT AND SOIL,2019,442(1-2):311-321. |
| APA | Yan, Yuchun.,Xu, Dawei.,Xu, Xingliang.,Wang, Deli.,Wang, Xu.,...&Eldridge, David J..(2019).Shrub patches capture tumble plants: potential evidence for a self-reinforcing pattern in a semiarid shrub encroached grassland.PLANT AND SOIL,442(1-2),311-321. |
| MLA | Yan, Yuchun,et al."Shrub patches capture tumble plants: potential evidence for a self-reinforcing pattern in a semiarid shrub encroached grassland".PLANT AND SOIL 442.1-2(2019):311-321. |
入库方式： OAI收割
来源：地理科学与资源研究所
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