| Critical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateau | |
| Li, XX (Li, Xiaoxia)1; Liang, E (Liang, Eryuan)1,2; Gricar, J (Gricar, Jozica)3; Rossi, S (Rossi, Sergio)4,5; Cufar, K (Cufar, Katarina)6; Ellison, AM (Ellison, Aaron M.)7; Liang, E | |
| Source Publication | SCIENCE BULLETIN
 |
| 2017 | |
| Volume | 62Issue:11Pages:804-812 |
| DOI | 10.1016/j.scib.2017.04.025 |
| Abstract | Physiological and ecological mechanisms that define treelines are still debated. It has been suggested that the absence of trees above the treeline is caused by low temperatures that limit growth. Thus, we hypothesized that there is a critical minimum temperature (CTmin) preventing xylogenesis at treeline. We tested this hypothesis by examining weekly xylogenesis across three and four growing seasons in two natural Smith fir (Abies georgei var. smithii) treeline sites on the southeastern Tibetan Plateau. Despite differences in the timing of cell differentiation among years, minimum air temperature was the dominant climatic variable associated with xylem growth; the critical minimum temperature (CTmin) for the onset and end of xylogenesis occurred at 0.7 +/- 0.4 degrees C. A process-based modelling chronology of tree-ring formation using this CTmin was consistent with actual tree-ring data. This extremely low CTmin permits Smith fir growing at treeline to complete annual xylem production and maturation and provides both support and a mechanism for treeline formation. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved. |
| Subject Area | 自然地理学 |
| WOS ID | WOS:000405584900014 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | SPRUCE PICEA-ABIES GROWTH-LIMITATION CAMBIAL ACTIVITY NORWAY SPRUCE SCOTS PINE ALTITUDINAL GRADIENT CARBON STORAGE GROWING-SEASON BLACK SPRUCE TREE GROWTH |
| WOS Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences ; Science & Technology - Other Topics |
| Cooperation Status | 国际 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8379 |
| Collection | 图书馆 |
| Corresponding Author | Liang, E |
| Affiliation | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China. 2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 3.Slovenian Forestry Inst, Dept Yield & Silviculture, Vecna Pot 2, SI-1000 Ljubljana, Slovenia. 4.Univ Quebec Chicoutimi, Dept Sci Fondamentales, 555 Blvd Univ, Chicoutimi, PQ G7H 2B1, Canada. 5.Chinese Acad Sci, South China Bot Garden, Guangdong Prov Key Lab Appl Bot, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou 510650, Guangdong, Peoples R China. 6.Univ Ljubljana, Biotech Fac, Dept Wood Sci & Technol, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia. 7.Harvard Univ, Harvard Forest, 324 North Main St, Petersham, MA 01366 USA. |
| Recommended Citation GB/T 7714 | Li, XX ,Liang, E ,Gricar, J ,et al. Critical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateau[J]. SCIENCE BULLETIN,2017,62(11):804-812. |
| APA | Li, XX .,Liang, E .,Gricar, J .,Rossi, S .,Cufar, K .,...&Liang, E.(2017).Critical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateau.SCIENCE BULLETIN,62(11),804-812. |
| MLA | Li, XX ,et al."Critical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateau".SCIENCE BULLETIN 62.11(2017):804-812. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.62(11) 804-812 201（484KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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