Consistent limitation of growth by high temperature and low precipitation from range core to southern edge of European beech indicates widespread vulnerability to changing climate
Consistent limitation of growth by high temperature and low precipitation from range core to southern edge of European beech indicates widespread vulnerability to changing climate
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DOI：
10.1007/s10342-016-0982-7
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发表时间：
2016-10-01
影响因子：
2.8
通讯作者：
Jump, A. S.
中科院分区：
文献类型：
--
作者：
Hacket-Pain, A. J.;Cavin, L.;Jump, A. S.
研究了欧洲山毛榉（Fagus sylvatica L，欧洲山毛榉）径向生长在不同地理分布和气候耐受性条件下对气候的响应。我们将新的和现有的数据结合起来，建立了一个140棵树木年轮年表的数据库，以研究生长-气候关系的模式。我们新颖的荟萃分析方法首次研究了气候对整个物种地理分布的树木生长的影响。我们确定了树木年轮年表中的关键气候信号，然后研究了这些信号在地理上、当地平均气候、树木年龄和大小方面的变化。我们发现与生长显著相关的最重要气候变量没有表现出强烈的地理格局。中心地带和南缘的树木生长受到生长季高温少降水和前一个夏季高温的影响。然而，生长在温暖和干燥地区的树木的生长与夏季降水的相关性比其他种群更频繁。此外，年龄较大的树木的生长与夏季气温的相关性比年龄较小的树木更频繁。生长在物种地理分布的南部的树木通常被认为最容易受到气候变化的影响，但我们的研究结果表明，分布的其他地区的种群径向生长同样可能与夏季气候显著相关，并且可能也很脆弱。此外，来自老树的年轮包含特殊的生长-气候关系，这在年轻的树木中很少发现。这些结果对预测整个大陆森林碳平衡、资源利用和未来森林组成的可能变化具有重要意义。
The aim of our study was to determine variation in the response of radial growth in Fagus sylvatica L (European Beech) to climate across the species full geographical distribution and climatic tolerance. We combined new and existing data to build a database of 140 tree-ring chronologies to investigate patterns in growth-climate relationships. Our novel meta-analysis approach has allowed the first investigation of the effect of climate on tree growth across the entire geographical distribution of the species. We identified key climate signals in tree-ring chronologies and then investigated how these varied geographically and according to mean local climate, and by tree age and size. We found that the most important climate variables significantly correlated with growth did not show strong geographical patterns. Growth of trees in the core and at the southern edge of the distribution was reduced by high temperature and low precipitation during the growing season, and by high temperatures in the previous summer. However, growth of trees growing in warmer and drier locations was more frequently significantly correlated with summer precipitation than other populations. Additionally, the growth of older and larger trees was more frequently significantly correlated with previous summer temperature than younger and smaller trees. Trees growing at the south of the species geographical distributions are often considered most at risk from climate change, but our results indicate that radial growth of populations in other areas of the distribution is equally likely to be significantly correlated with summer climate and may also be vulnerable. Additionally, tree-rings from older trees contain particular growth-climate relationships that are rarely found in younger trees. These results have important implications for predicting forest carbon balance, resource use and likely future changes to forest composition across the continent.