Winter matters: Sensitivity to winter climate and cold events increases towards the cold distribution margin of European beech (Fagus sylvatica L.)
Winter matters: Sensitivity to winter climate and cold events increases towards the cold distribution margin of European beech (Fagus sylvatica L.)
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冬季很重要：欧洲山毛榉（Fagus sylvatica L）的冷分布边缘对冬季气候和寒冷事件的敏感性增加
DOI：
10.1111/jbi.13444
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发表时间：
2018
影响因子：
3.9
通讯作者：
van der Maaten E
中科院分区：
文献类型：
--
作者：
Weigel R;Muffler L;Klisz M;Kreyling J;van der Maaten‐Theunissen M;Wilmking M;van der Maaten E
目的欧洲山毛榉（Fagus sylvaticaL.）是欧洲的主要森林树种，它覆盖了欧洲大陆的大片地区，因此经历了不同的气候条件。面对预测的气候变化和分布范围的变化，重要的是要了解不同的气候增长关系对分布范围。山毛榉一般是敏感的夏季干旱对干旱和大陆地区，然而，很少有研究调查气候敏感性对寒冷的山毛榉分布边缘。我们假设在较冷的地点（a）山毛榉的生长对冬季寒冷更敏感，（B）生长受夏季干旱的影响较小，（c）全林生长减少（负指针年）与极端冬季寒冷事件有关。位置冬季气温下降梯度大（ΔT >4 K沿着500 km）从罗斯托克（德国）到格但斯克（波兰）.MethodsWe分析了气候-生长关系和11个山毛榉林分从更中心到冷边缘山毛榉种群生长减少的性质.ResultsTowards the cold marginal populations，生长对冬季寒冷（2月温度）越来越敏感，对夏季水分供应（6月降水）不太敏感。同样，负指针年正好与冬季寒冷异常在较冷的网站和夏季干旱异常在较温暖的网站。因此，在所研究的梯度，一般的敏感性山毛榉夏季干旱过渡到敏感性冬季cold.Main conclusionsA范围转移山毛榉在当前的冷分布的边缘往往被假定为补偿栖息地和生产力损失的干旱易发南部和中部人口。关于我们研究中发现的冬季寒冷敏感性，应谨慎对待此类假设。由于冬季寒冷的事件预计持续类似的频率和幅度，即使在预测的气候变暖，山毛榉种群在新殖民地的栖息地可能是显着敏感的冬季寒冷。
AimThe dominant forest tree in Europe, European beech (Fagus sylvaticaL.), covers large areas of continental Europe and thus experiences diverse climatic conditions. In the face of predicted climate change and shifts of distribution ranges, it is important to understand the diverse climate–growth relationships towards distribution margins. Beech is generally reported to be sensitive to summer drought towards dry and continental regions; yet, few studies have investigated climate sensitivity towards the cold distribution margin of beech. We hypothesized that at colder sites (a) growth of beech is more sensitive to winter cold, (b) growth is less influenced by summer drought, and (c) stand‐wide growth reductions (negative pointer years) are related to extreme winter cold events.TaxonEuropean beech (Fagus sylvaticaL.).LocationA large gradient of decreasing winter temperature (ΔT >4 K along 500 km) from Rostock (Germany) to Gdańsk (Poland).MethodsWe analysed climate–growth relationships and the nature of growth reductions of 11 beech stands from more central to cold marginal beech populations.ResultsTowards the cold marginal populations, growth became increasingly sensitive to winter cold (February temperature) and less sensitive to summer water availability (June precipitation). Likewise, negative pointer years coincided with winter cold anomalies at the colder sites and with summer drought anomalies at the warmer sites. Thus, over the studied gradient, the general sensitivity of beech to summer drought transitions into sensitivity to winter cold.Main conclusionsA range shift of beech across the current cold distribution margin is often assumed to compensate for habitat and productivity losses of drought‐prone southern and central populations. With respect to the winter cold sensitivity found in our study, such assumptions should be taken with caution. Since winter cold events are predicted to persist with similar frequency and magnitude even during predicted climate warming, beech populations in the newly colonized habitat might be significantly sensitive to winter cold.
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