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Dendroecological assessment of climate resilience of the rare and scattered forest tree species Tilia cordata Mill. in northwestern Europe
Forestry ( IF 2.8 ) Pub Date : 2020-06-01 , DOI: 10.1093/forestry/cpaa011
Nicolas Latte 1 , Philippe Taverniers 1 , Tanguy de Jaegere 1 , Hugues Claessens 1
Affiliation  

To increase forest resilience to global change, forest managers are often directing forest stands towards a broader diversity of tree species. The small-leaved lime (Tilia cordata Mill.), a rare and scattered species in northwestern Europe, is a promising candidate for this purpose. Its life traits suggest a high resilience to climate change and a favourable impact on forest ecosystem services. This study used a dendroecological approach to assess how lime tree radial growth had responded to the past climatic change. First, 120 lime trees from nine sites were selected in southern Belgium based on criteria adapted to the rareness of the species. Chronology quality was assessed and resulting tree-ring series were validated at site and region levels. Second, a range of dendrochronological methods was used to analyze the changes over time in the variability and long-term trends of lime tree growth and their relation to climate during the period 1955–2016. Last, behaviour of lime trees was compared with that of beech from the same region and time period. For this purpose, the same methodology was applied to an additional beech tree-ring dataset (149 trees from 13 sites). Beech is the climax tree species of the region, but is known to be drought-sensitive and has shown weaknesses in the current climate. The quality of our tree-ring series attests that dendroecological investigation using rare and scattered species is possible, opening the way to further analysis on other such lesser-known forest tree species. The analysis showed that the small-leaved lime had been resilient to the past climatic change in multiple ways. Lime growth increased during the preceding decades despite an increased frequency and intensity of stressful climatic events. Lime growth quickly recovered in the years following the stresses. The growth–climate relationships were either stable over time or had a positive evolution. The behaviour of lime contrasted strongly with that of beech. Lime performed better than beech in every analysis. Small-leaved lime is thus a serious candidate for addressing climate change challenges in the region. It should be considered by forest managers planning to improve the sustainability and resilience of their forests, in particular in vulnerable beech stands.

中文翻译:

该稀散森林树种的气候适应能力的评估Dendroecological紫榆磨。在西北欧

为了增强森林对全球变化的适应力,森林管理者经常将林分引向更广泛的树种多样性。小叶石灰(T虫草)米尔(Mill。)是欧洲西北部稀有且分散的物种,是用于此目的的有希望的候选人。它的生活特征表明它对气候变化具有高度的适应力,并对森林生态系统服务产生了有利影响。这项研究采用了树状生态学方法来评估radial树的径向生长对过去的气候变化的反应。首先,根据适合该物种稀有性的标准,从比利时南部的9个地点中选出120棵lime树。评估了年代学质量,并在站点和区域级别验证了所得到的树木年轮系列。其次,使用了一系列的年代学方法来分析1955-2016年期间lime树生长的变异性和长期趋势及其与气候的关系随时间的变化。持续,比较了同一地区和同一时期from树的行为与山毛榉的行为。为此,将相同的方法应用于其他山毛榉树年轮数据集(来自13个站点的149棵树)。山毛榉是该地区的高潮树种,但已知对干旱敏感,在当前气候下显示出弱点。我们的树木年轮系列的质量证明,可以使用稀有和分散的树种进行树状生态学调查,从而为进一步分析其他此类鲜为人知的森林树种开辟了道路。分析表明,小叶石灰以多种方式对过去的气候变化具有抵抗力。尽管有压力的气候事件发生的频率和强度增加,但在过去的几十年中,石灰的生长仍在增加。在压力过后的几年中,石灰的生长迅速恢复。生长与气候的关系随着时间的推移是稳定的,或者是正向的。石灰的行为与山毛榉的行为形成强烈对比。在每项分析中,石灰的表现均优于山毛榉。因此,小叶石灰是应对该地区气候变化挑战的重要候选人。计划改善其森林的可持续性和复原力的森林管理者应考虑采用这种方法,尤其是在易损的山毛榉林中。
更新日期:2020-06-01
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