Seasonal Shift in Climatic Limiting Factors on Tree Transpiration: Evidence from Sap Flow Observations at Alpine Treelines in Southeast Tibet
文献类型：期刊论文
| 作者 | Zhang, L (Zhang, Lin)1,3; Liu, XS; Liu, XS (Liu, Xinsheng)2,3; Nie, YQ (Nie, Yuqin)2; Luo, TX (Luo, Tianxiang)1,3; Yu, JH (Yu, Jiehui)3; Shen, W (Shen, Wei)3 |
| 刊名 | FRONTIERS IN PLANT SCIENCE
 |
| 出版日期 | 2016 |
| 卷号 | 7期号:0页码:1018 |
| 关键词 | Pinus-canariensis Forest Central Tyrolean Alps Low Soil Temperatures Scots Pine Water-use Sergyemla Mountains Canopy Transpiration Norway Spruce Photosynthesis Timberline |
| DOI | 10.3389/fpls.2016.01018 |
| 文献子类 | Article |
| 英文摘要 | Alpine and northern treelines are primarily controlled by low temperatures. However, little is known about the impact of low soil temperature on tree transpiration at treelines. We aim to test the hypothesis that in cold-limited forests, the main limiting factors for tree transpiration switch from low soil temperature before summer solstice to atmospheric evaporative demand after summer solstice, which generally results in low transpiration in the early growing season. Sap flow, meteorological factors and predawn needle water potential were continuously monitored throughout one growing season across Smith fir (Abies georgei var. smithii) and juniper (Juniperus saltuaria) treelines in southeast Tibet. Sap flow started in early May and corresponded to a threshold mean air-temperature of 0 degrees C. Across tree species, transpiration was mainly limited by low soil temperature prior to the summer solstice but by vapor pressure deficit and solar radiation post-summer solstice, which was further confirmed on a daily scale. As a result, tree transpiration for both tree species was significantly reduced in the pre-summer solstice period as compared to post-summer solstice, resulting in a lower predawn needle water potential for Smith fir trees in the early growing season. Our data supported the hypothesis, suggesting that tree transpiration mainly responds to soil temperature variations in the early growing season. The results are important for understanding the hydrological response of cold-limited forest ecosystems to climate change. |
| 学科主题 | 自然地理学 |
| 语种 | 英语 |
| WOS记录号 | WOS:000379567000001 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/7658]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Liu, XS |
| 作者单位 | 1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 2.Jiujiang Univ, Coll Tourism & Terr Resources, Jiujiang, Jiangxi Provinc, Peoples R China 3.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 | Zhang, L ,Liu, XS,Liu, XS ,et al. Seasonal Shift in Climatic Limiting Factors on Tree Transpiration: Evidence from Sap Flow Observations at Alpine Treelines in Southeast Tibet[J]. FRONTIERS IN PLANT SCIENCE,2016,7(0):1018. |
| APA | Zhang, L .,Liu, XS.,Liu, XS .,Nie, YQ .,Luo, TX .,...&Shen, W .(2016).Seasonal Shift in Climatic Limiting Factors on Tree Transpiration: Evidence from Sap Flow Observations at Alpine Treelines in Southeast Tibet.FRONTIERS IN PLANT SCIENCE,7(0),1018. |
| MLA | Zhang, L ,et al."Seasonal Shift in Climatic Limiting Factors on Tree Transpiration: Evidence from Sap Flow Observations at Alpine Treelines in Southeast Tibet".FRONTIERS IN PLANT SCIENCE 7.0(2016):1018. |
入库方式： OAI收割
来源：青藏高原研究所
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