The Dry and the Wet Case: Tree Growth Response in Climatologically Contrasting Years on the Island of Corsica
The Dry and the Wet Case: Tree Growth Response in Climatologically Contrasting Years on the Island of Corsica
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DOI：
10.3390/f12091175
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发表时间：
2021-08
期刊：
影响因子：
2.9
通讯作者：
M. Häusser;S. Szymczak;Isabel Knerr;J. Bendix;É. Garel;F. Huneau;K. Trachte;S. Santoni;A. Bräuning
中科院分区：
文献类型：
--
作者：
M. Häusser;S. Szymczak;Isabel Knerr;J. Bendix;É. Garel;F. Huneau;K. Trachte;S. Santoni;A. Bräuning
黑松（Pinus nigra Arnold subsp. laricio Maire）和海洋松（Pinus pinaster艾顿）进行了监测，以量化两个气象对比连续年份的影响。在地中海盆地西部的法属科西嘉岛，2017年极其干燥，而2018年则异常潮湿。我们附加电动带测树仪，以36松树沿着东西向样带，跨越中央山脉，并建立自动气象站在所有五个地点，从10米的海拔高度至1600米的海拔高度。将树干径向变异（SRV）分为不可逆生长（GRO）期和水分亏缺（TWD）期。在2017年的干旱期间，最严重的树木缺水发生在该岛的西部，而高海拔地区的树木比低海拔地区受到的影响更大。SRV的长期下降，甚至接近树线，表明双峰生长，并揭示了高可塑性的生长模式，在科西嘉松。树干径向变异与降水量和温度呈显著正相关。GRO与降水正相关，TWD与温度负相关，说明2017年蒸散量高导致了TWD的强烈期。一种新的方法被用来进一步调查的增长/气候的关系，包括天气尺度的压力情况。这表明，海拔梯度GRO每天气模式只存在于潮湿的一年，即使很少发生的天气模式可以有很大的影响树木的生长。这种新的方法提供了一个更全面的了解树木生长模式的气象驱动因素，将不同尺度的气候系统。
Stem radial variations of Corsican Black pine (Pinus nigra Arnold subsp. laricio Maire) and Maritime pine (Pinus pinaster Aiton) were monitored to quantify the impact of two meteorologically contrasting consecutive years. On the French island of Corsica, in the western Mediterranean basin, the year 2017 was extremely dry, while 2018 was exceptionally wet. We attached electric band dendrometers to 36 pines along an east–west transect, spanning the central mountain range, and set up automated weather stations at all five sites, ranging from 10 m asl to 1600 m asl. Stem radial variations (SRV) were separated into irreversible growth (GRO) and tree water deficit (TWD) periods. During the drought of 2017, the most severe tree water deficits occurred in the western part of the island, whereas trees at higher elevations were more affected than at lower elevations. A prolonged decrease of SRV, even close to the tree line, suggests bimodal growth and reveals high plasticity of growth patterns in both Corsican pines. Stem radial variations correlated significantly with precipitation and temperature. The positive correlations of GRO with precipitation and the negative correlations of TWD with temperature imply that high evapotranspiration led to the intense period of TWD in 2017. A novel approach was used to further investigate the growth/climate relationship by including synoptic-scale pressure situations. This revealed that an elevation gradient in GRO per weather pattern was only present in the wet year and that even rarely occurring weather patterns can have a substantial impact on tree growth. This novel approach provides a more comprehensive insight into meteorological drivers of tree growth patterns by incorporating different scales of the climatic system.