Degradation shifts plant communities from S- to R-strategy in an alpine meadow, Tibetan Plateau
文献类型：期刊论文
| 作者 | Zhou, Tiancai1,3; Hou, Ge1,3; Sun, Jian2; Zong, Ning1,3; Shi, Peili1,3 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-12-15 |
| 卷号 | 800页码:11 |
| 关键词 | CSR strategy Leaf traits Rangeland degradation Function groups Niche expansion Tibetan Plateau |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2021.149572 |
| 通讯作者 | Shi, Peili(shipl@igsnrr.ac.cn) |
| 英文摘要 | The replacement of dominant sedges/grasses with secondary forbs is common in alpine rangelands, but the un-derlying plant ecological strategies and their relevance to leaf traits and their variabilities of different plant func-tional groups remain largely unknown. Here, we measured key leaf traits and analyzed the competitor, stress-tolerator and ruderal (CSR) strategies of major species with different functional groups (sedges, grasses and forbs) in an alpine meadow along a degradation gradient on the Tibetan Plateau. Our results indicated that S-selected species were dominant in both non-degraded (C:S:R = 1:95:4%) and severely degraded (C:S:R = 2:87:11%) meadows. However, there was a shift from S-to R-strategy in the communities after rangeland degra-dation. More specifically, sedges and grasses with a "conservative" strategy maintained stronger S-strategy to tol-erate degraded and stressful conditions. In contrast, forbs with an "opportunistic" strategy (increase 9.5% in R-score) tended to adapt to degraded stages. Moreover, 51.1% and 23.9% of the increased R-scores in forbs were accounted by leaf mass per area and specific leaf area, respectively. Generally, higher leaf water and nitrogen con-tents coupled with larger variations in leaf traits and flexible SR strategies in forbs enabled them to capitalize on lower soil water and nutrient availability. Our findings highlighted that the contrasting strategies of plant species in response to the decrease in available resources might lead to niche expansion of secondary forbs and loss of diversity in the degraded alpine meadow. The emerging alternative stable states in the degraded rangelands might bring about a predicament for rangeland restoration. (c) 2021 Published by Elsevier B.V. |
| WOS关键词 | TRAITS ; NITROGEN ; DISTURBANCE ; COMPETITION ; GRASSLANDS ; DIVERSITY ; DOMINANCE ; DYNAMICS ; BIOMASS ; STEPPE |
| 资助项目 | National Natural Science Founda-tion of China[31870406] ; National Natural Science Founda-tion of China[42071066] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000701792800009 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Founda-tion of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/166072]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Shi, Peili |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Resource, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Tiancai,Hou, Ge,Sun, Jian,et al. Degradation shifts plant communities from S- to R-strategy in an alpine meadow, Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,800:11. |
| APA | Zhou, Tiancai,Hou, Ge,Sun, Jian,Zong, Ning,&Shi, Peili.(2021).Degradation shifts plant communities from S- to R-strategy in an alpine meadow, Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,800,11. |
| MLA | Zhou, Tiancai,et al."Degradation shifts plant communities from S- to R-strategy in an alpine meadow, Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 800(2021):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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