Leaf phenology sensitivity to temperature in European trees: Do within-species populations exhibit similar responses?
Leaf phenology sensitivity to temperature in European trees: Do within-species populations exhibit similar responses?
复制标题
DOI：
10.1016/j.agrformet.2008.10.019
复制
发表时间：
2009-05-07
影响因子：
6.2
通讯作者：
Michalet, Richard
中科院分区：
文献类型：
--
作者：
Vitasse, Yann;Delzon, Sylvain;Michalet, Richard
气候变暖对树木物候的影响是显而易见的，但人们对物种之间和物种内种群之间的物候敏感性差异知之甚少。本研究的目的是利用海拔和时间梯度，比较两个地理区域之间七种木本物种之间和物种内的物候敏感性（白冷杉、枫槭、桦木、水青冈、白蜡树、冬青和白栎）。对叶子展开的时间进行了监测（i）在比利牛斯山脉（6 个物种）中沿着两个海拔梯度进行了 2 年多的监测，以及（ii）在枫丹白露森林（4 个物种）中进行了 22 年多的监测。这两个地区都存在三个物种，这使我们能够比较它们在海拔和时间梯度上对温度的物候敏感性。沿着海拔梯度，我们观察到所有物种的叶子展开都随着海拔的降低而提前，山毛榉和橡树的叶子展开时间分别为 11 至 34 天 1000 m(-1)。在整个时间梯度上，我们发现自 1976 年以来，橡树（-0.42 天，年（-1））和白蜡木（-0.78 天，年（-1））的叶子展开显着进步，而山毛榉和角树则没有观察到显着的进步。对于梯度和所有物种，除了时间研究中的山毛榉外，叶子展开日期和温度之间都发现显着相关性。此外，我们强调，两个地理上分离的种群（比利牛斯山脉和枫丹白露森林）对温度的物候敏感性非常相似。因此，橡木的敏感性最强（海拔梯度和时间梯度分别为-7.48 和-7.26 天C-1），山毛榉的敏感性最低（-2.09 和-2.03 天C-1）。我们的结果表明，尽管可能存在局部适应，但对于特定物种来说，种群对全球变暖的敏感性可能是稳定的。 (C) 2008 Elsevier B.V. 保留所有权利。
Consequences of climate warming on tree phenology are readily observable, but little is known about the differences in phenological sensitivity to temperature between species and between populations within a species. The aim of the present study is to compare phenological sensitivities to temperature of seven woody species between each other and within-species between two geographical areas using both altitudinal and temporal gradients (Abies alba, Acer pseudoplatanus, Carpinus betulus, Fagus sylvatica, Fraxinus excelsior, Ilex aquifolium and Quercus petraea). The timing of leaf unfolding was monitored (i) over 2 years along two altitudinal gradients in the Pyrenees mountains (six species), and (ii) over 22 years in Fontainebleau forest (four species). Three species were present in both areas which allowed us to compare their phenological sensitivity to temperature over altitudinal and temporal gradients. Along altitudinal gradients, we observed for all species an advance in leaf unfolding with decreasing elevation, ranging from 11 to 34 days 1000 m(-1) for beech and oak, respectively. Across the temporal gradient, we found significant advances in leaf unfolding for oak (-0.42 days year(-1)) and ash (-0.78 days year(-1)) since 1976, whereas no significant advance was observed for beech and hornbeam. For both gradients and for all species, significant correlations were found between leaf unfolding dates and temperature, except for beech in the temporal study. Moreover, we highlighted that phenological sensitivity to temperature was very similar between the two geographically separated populations (Pyrenees and Fontainebleau forests). Thus, oak had the strongest sensitivity (-7.48 and -7.26 days degrees C-1 in altitudinal and temporal gradient, respectively) and beech had the lowest (-2.09 and -2.03 days degrees C-1). Our results suggest that population sensitivity to global warming might be stable for a given species, in spite of its possible local adaptation. (C) 2008 Elsevier B.V. All rights reserved.