期刊
FOREST ECOLOGY AND MANAGEMENT
卷 396, 期 -, 页码 150-159出版社
ELSEVIER
DOI: 10.1016/j.foreco.2017.04.012
关键词
Radial growth; Climate; Altitudinal gradient; Abies alba; Mediterranean region
类别
资金
- National Institute for Agricultural Research (INRA)
- Provence-Alpes-Cote-D'Azur (PACA) region
- ANR DRYADE project [ANR-06-VULN-004]
- MeCC project [ANR-13-ADAP-0006]
- INRA AAFCC metaprogramme (ACCAF)
Tree ring widths provide very useful information to assess factors controlling tree radial growth and to estimate future growth trajectories under climate change. Radial growth variability has already been largely studied among tree populations that experience different environmental conditions and was most recently analyzed among individuals within populations. In the present study we assessed, over the 1960-2011 period, the growth response of silver fir (Abies alba Mill.) individuals originating from ten populations located along two altitudinal gradients (1000-1600 m a.s.l.) in the south east of France. Tree ring increments were estimated from wood cores collected from 129 adult trees. Results showed that (i) 30% of the growth variance among individuals was explained by competition; (ii) the climates of both the current and previous years were correlated with growth. Most of the climatic variables affecting growth were consistent with those identified in previous studies and with the known physiology of the species: negative effects of summer drought of the current and past years as well as a positive effect of the spring temperature of the current year. However in our study, fir growth was also enhanced by previous year spring droughts. The growth responses to precipitation, temperature, and, relative humidity of the current and previous years varied between sites and/or altitudinal levels, reflecting population acclimation by plasticity or genetic adaptation to local conditions. By contrast, only summer rainfall induced variable responses between individual trees, result attributed to the edaphic micro local heterogeneity. The recent climate change did not significantly alter the fir growth response to climate. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据