Spatially heterogeneous responses of tree radial growth to recent El
Spatially heterogeneous responses of tree radial growth to recent El
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树木径向生长对近期 El 的空间异质响应
DOI：
10.1016/j.agrformet.2020.107939
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发表时间：
2020
影响因子：
6.2
通讯作者：
Zhou Peng
中科院分区：
文献类型：
--
作者：
Li Jingye;Huang Jian-Guo;Tardif Jacques C.;Liang Hanxue;Jiang Shaowei;Zhu Huoxing;Zhou Peng
在过去几十年中，观测到厄尔尼诺现象的幅度和平均强度都有所增加。为了确定树木生长和最近的厄尔尼诺变异是如何在东亚亚热带森林（EASF），我们进行了树木生态学研究，使用网络的25个地带性树轮宽度年表从马尾松。在EASF中，树木分布在广泛的纬度（23 - 33°N）和海拔（77 - 1285 m）梯度上。使用主成分分析（PCA），自举相关性，空间相关性和中介分析，年际树木径向生长（1987年至2015年期间），厄尔尼诺变率和气候变量之间的关联进行了测试。我们的研究表明，P.气候异常（春、秋季温暖/阳光充足，冬、夏季水分亏缺减少）与NINO3.4指数呈正相关。此外，研究结果还表明，在EASF中，从南到北，树木对厄尔尼诺的正径向生长响应显著增强，这可能是由于树木生长更多地受益于厄尔尼诺相关的水分亏缺释放和北方栖息地10月日照增加，而这些栖息地传统上比南方更寒冷和干燥。
A greater amplitude and higher mean intensity of the El Niño phenomenon have both been observed in the last few decades. In order to determine how tree growth and recent El Niño variabilities are associated within the East Asia subtropical forest (EASF), we conducted a dendroecological study using a network of 25 zonal tree-ring width chronologies fromPinus massonianaLamb. trees distributed across extensive latitudinal (23 to 33°N) and elevational (77 to 1285 m) gradients in EASF. Using principal component analysis (PCA), bootstrapped correlations, spatial correlations, and mediation analysis, the associations among interannual tree radial growth (over the period of 1987 to 2015), El Niño variability, and the climate variables were tested. Our study indicates that the radial growth ofP. massonianais generally stimulated by climate anomalies (warmer/sunnier spring and fall and lower water deficit from winter to summer) positively associated with NINO3.4 index. Moreover, the results also demonstrate that the positive radial growth response to El Niño is significantly strengthened from south to north in the EASF, which could be attributed to tree growth benefiting more from the El Niño-related water deficit release and October sunshine increase in northern habitats, which are traditionally colder and drier than the south.