Summer solstice marks a seasonal shift in temperature sensitivity of stem growth and nitrogen-use efficiency in cold-limited forests
文献类型：期刊论文
| 作者 | Wright, IJ (Wright, Ian J.)3; Luo, TX (Luo, Tianxiang)1,4; Liu, XS (Liu, Xinsheng)1,5; Zhang, L (Zhang, Lin)1; Li, X (Li, Xiang)1; Pan, YD (Pan, Yude)2 |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2018-01-15 |
| 卷号 | 248期号:0页码:469-478 |
| 关键词 | TREE-RING EVIDENCE SERGYEMLA MOUNTAINS CAMBIAL ACTIVITY WHITE SPRUCE CARBON RESPONSES XYLOGENESIS CLIMATE LEAF PRODUCTIVITY |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2017.10.029 |
| 英文摘要 | In boreal forests and alpine treelines, it is debatable how the temperature sensitivity of tree-ring growth should vary with changes in climate over time and the extent to which seasonal stem increments are controlled by leaf physiology. We aim to test the hypothesis that, in cold-limited forests, maximizing stem growth rate around summer solstice is closely related to foliage turnover, which generally results in high sensitivity of stem growth and less sensitivity of nitrogen-use efficiency (NUE) to early-season temperatures. Our analysis was based on repeat-census observations of stem radial increment (2008-2013; made with dendrometers) and monthly litterfall (2007-2015) as well as the measurements of tree-ring width series (1960-2015; made with tree-ring cores) in two Tibetan treeline forests. NUE was estimated as the inverse of leaf-litter nitrogen concentration. We further examined a global dataset of tree-ring chronologies (1931-1990) from 139 sites across temperate and boreal coniferous forests in the northern high-latitude region. Weekly stem increments across species and years synchronously peaked around summer solstice, with more than half of annual increment produced in the first 28-35 days of the growing season when air and soil temperatures were still low. Monthly stem increments were positively related to previous-month litterfall, and higher litterfall generally resulted in higher NUE. NUE was insensitive or less sensitive to soil temperature in the early growing season. Among years, pre-peak increments were positively correlated with pre-solstice temperatures while post-peak increments varied little. The annual increment was dominated by and coherent with the pre-peak increment and well correlated with the ring-width measurements of monitored trees during 2008-2013. Variations in tree-ring width chronologies from the two Tibetan treelines and the global 139 forest sites mainly reflected the change of early summer temperatures. The findings suggest a day-length control on the linkage between seasonal stem growth and nitrogen cycling in a cold-limited forest ecosystem, and provide the basic for predicting responses of tree-ring growth and NUE to climatic warming. |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000417659700041 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8761]  |
| 专题 | 青藏高原研究所_图书馆 |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Bldg 3,Courtyard 16,Lin Cui Rd, Beijing 100101, Peoples R China; 2.US Forest Serv, USDA, Northern Global Change Program, Newtown Sq, PA 19073 USA; 3.[Wright, Ian J.] Macquarie Univ, Dept Biol Sci, N Ryde, NSW 2109, Australia; 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 5.Jiujiang Univ, Coll Tourism & Terr Resources, Jiujiang 332005, Jiangxi, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wright, IJ ,Luo, TX ,Liu, XS ,et al. Summer solstice marks a seasonal shift in temperature sensitivity of stem growth and nitrogen-use efficiency in cold-limited forests[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,248(0):469-478. |
| APA | Wright, IJ ,Luo, TX ,Liu, XS ,Zhang, L ,Li, X ,&Pan, YD .(2018).Summer solstice marks a seasonal shift in temperature sensitivity of stem growth and nitrogen-use efficiency in cold-limited forests.AGRICULTURAL AND FOREST METEOROLOGY,248(0),469-478. |
| MLA | Wright, IJ ,et al."Summer solstice marks a seasonal shift in temperature sensitivity of stem growth and nitrogen-use efficiency in cold-limited forests".AGRICULTURAL AND FOREST METEOROLOGY 248.0(2018):469-478. |
入库方式： OAI收割
来源：青藏高原研究所
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