Trade-Offs of Plant Biomass by Precipitation Regulation Across the Sanjiangyuan Region of Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Xiang, Mingxue2; Fu, Gang3; Wu, Junxi3; Ma, Yunqiao2; Ma, Tao2; Zheng, Kai2; Wang, Zhaoqi1,2; Zhao, Xinquan1,2 |
| 刊名 | PLANTS-BASEL
 |
| 出版日期 | 2025-07-27 |
| 卷号 | 14期号:15页码:2325 |
| 关键词 | alpine grasslands biomass trade-off precipitation Sanjiangyuan Qinghai-Tibet Plateau |
| ISSN号 | 2223-7747 |
| DOI | 10.3390/plants14152325 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Climate change alters plant biomass allocation and aboveground-belowground trade-offs in grassland ecosystems, potentially affecting critical functions such as carbon sequestration. However, uncertainties persist regarding how precipitation gradients regulate (1) responses of aboveground biomass (AGB), belowground biomass (BGB), and total biomass in alpine grasslands, and (2) precipitation-mediated AGB-BGB allocation strategies. To address this, we conducted a large-scale field survey across precipitation gradients (400-700 mm/y) in the Sanjiangyuan alpine grasslands, Qinghai-Tibet Plateau. During the 2024 growing season, a total of 63 sites (including 189 plots and 945 quadrats) were sampled along five aridity classes: <400, 400-500, 500-600, 600-700, and >700 mm/y. Our findings revealed precipitation as the dominant driver of biomass dynamics: AGB exhibited equal growth rates relative to BGB within the 600-700 mm/y range, but accelerated under drier/wetter conditions. This suggests preferential allocation to aboveground parts under most precipitation regimes. Precipitation explained 31.71% of AGB-BGB trade-off variance (random forest IncMSE), surpassing contributions from AGB (17.61%), specific leaf area (SLA, 13.87%), and BGB (12.91%). Structural equation modeling confirmed precipitation's positive effects on SLA (beta = 0.28, p < 0.05), AGB (beta = 0.53, p < 0.05), and BGB (beta = 0.60, p < 0.05), with AGB-mediated cascades (beta = 0.33, p < 0.05) dominating trade-off regulation. These results advance our understanding of mechanistic drivers governing allometric AGB-BGB relationships across climatic gradients in alpine ecosystems of the Sanjiangyuan Region on the Qinghai-Tibet Plateau. |
| URL标识 | 查看原文 |
| WOS关键词 | BELOW-GROUND BIOMASS ; 3-RIVER SOURCE REGION ; CLIMATE-CHANGE ; ABOVEGROUND BIOMASS ; ALPINE GRASSLANDS ; ALLOCATION ; PRODUCTIVITY ; GRADIENT ; GROWTH ; FOREST |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001550669600001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215550]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Wang, Zhaoqi |
| 作者单位 | 1.Qinghai Univ, Qinghai Sanjiangyuan Grassland Ecosyst Natl Observ, Xining 810018, Peoples R China 2.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810018, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Xiang, Mingxue,Fu, Gang,Wu, Junxi,et al. Trade-Offs of Plant Biomass by Precipitation Regulation Across the Sanjiangyuan Region of Qinghai-Tibet Plateau[J]. PLANTS-BASEL,2025,14(15):2325. |
| APA | Xiang, Mingxue.,Fu, Gang.,Wu, Junxi.,Ma, Yunqiao.,Ma, Tao.,...&Zhao, Xinquan.(2025).Trade-Offs of Plant Biomass by Precipitation Regulation Across the Sanjiangyuan Region of Qinghai-Tibet Plateau.PLANTS-BASEL,14(15),2325. |
| MLA | Xiang, Mingxue,et al."Trade-Offs of Plant Biomass by Precipitation Regulation Across the Sanjiangyuan Region of Qinghai-Tibet Plateau".PLANTS-BASEL 14.15(2025):2325. |
入库方式： OAI收割
来源：地理科学与资源研究所
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