Seasonal drought amplifies stand density effects on water-use strategies in Populus tomentosa plantations
文献类型：期刊论文
| 作者 | Wan, Hui4; Xie, Xian4; Dong, Chenguang4; Wang, Xiang3; Zhang, Beibei2; Ren, Ranran1; Lu, Xinghui4; Wang, Ting4 |
| 刊名 | FOREST ECOLOGY AND MANAGEMENT
 |
| 出版日期 | 2026-07-15 |
| 卷号 | 612页码:123729 |
| 关键词 | Populus tomentosa Stable isotopes Water-use strategy Stand density Seasonal drought |
| ISSN号 | 0378-1127 |
| DOI | 10.1016/j.foreco.2026.123729 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Stand density is closely linked to tree water uptake strategies by modifying soil water availability and ultimately influences forest drought resilience. However, the water uptake patterns of trees in plantations and their responses to fluctuations in soil water availability under the combined effects of stand density and seasonal hydrological variability remain poorly understood. In this study, we employed dual stable isotopes (delta 2H and delta 18O) combined with a Bayesian mixing model (MixSIAR) to quantify seasonal variations in water uptake patterns of Populus tomentosa plantations across three stand densities (600, 900, and 1200 trees ha-1) in the Lower Yellow River region. Structural equation modeling (SEM) was further applied to evaluate how stand structure and tree physiological traits influenced water uptake patterns. Our findings indicate that during the dry season, P. tomentosa primarily relies on soil moisture at 100-200 cm depth (accounting for 54% of its water uptake), whereas water uptake shifted to the upper 0-100 cm (58%) following wet-season recharge. Across stand density, trees in medium-density stands showed the highest reliance on deep soil water compared with low-and high-density stands during the dry season, while no differences occurred among densities in the wet season, confirming the strong seasonal dependence of density effects. Deep soil water uptake is co-influenced by stand density, soil moisture, and stomatal regulation. The coordination between water-source partitioning and physiological behavior fundamentally shapes the water-use strategies of P. tomentosa. This study reveals that stand density influences drought resistance by seasonally adjusting water uptake depth and physiological behavior, providing a mechanistic basis for optimizing planted forest resilience under increasing drought. |
| URL标识 | 查看原文 |
| WOS关键词 | TREE MORTALITY ; SOIL ; GROWTH ; FOREST ; PINE ; TRANSPIRATION ; AVAILABILITY ; STRESS ; DEPTH |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:001732896100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221463]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Ting |
| 作者单位 | 1.Shandong Acad Forestry, Jinan 250014, Peoples R China 2.Chinese Acad Forestry, Ecol & Nat Conservat Inst, Key Lab Forest Ecol & Environm, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China; 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 4.Liaocheng Univ, Coll Agr & Biol, Liaocheng 252000, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wan, Hui,Xie, Xian,Dong, Chenguang,et al. Seasonal drought amplifies stand density effects on water-use strategies in Populus tomentosa plantations[J]. FOREST ECOLOGY AND MANAGEMENT,2026,612:123729. |
| APA | Wan, Hui.,Xie, Xian.,Dong, Chenguang.,Wang, Xiang.,Zhang, Beibei.,...&Wang, Ting.(2026).Seasonal drought amplifies stand density effects on water-use strategies in Populus tomentosa plantations.FOREST ECOLOGY AND MANAGEMENT,612,123729. |
| MLA | Wan, Hui,et al."Seasonal drought amplifies stand density effects on water-use strategies in Populus tomentosa plantations".FOREST ECOLOGY AND MANAGEMENT 612(2026):123729. |
入库方式： OAI收割
来源：地理科学与资源研究所
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