首页> 外文期刊>Annals of Forest Science >Has global change induced divergent trends in radial growth of Pinus sylvestris and Pinus halepensis at their bioclimatic limit? The example of the Sainte-Baume forest (south-east France).
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Has global change induced divergent trends in radial growth of Pinus sylvestris and Pinus halepensis at their bioclimatic limit? The example of the Sainte-Baume forest (south-east France).

机译:全球变化是否在生物气候极限条件下引起了樟子松和哈尔滨松径向生长的不同趋势? Sainte-Baume森林的例子(法国东南部)。

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摘要

It is agreed that climate (precipitation and temperature) influences the distribution of plant species. Near the margins of a species' natural range, climate becomes limiting to physiological processes. There, climate change may be expected to have a significant impact on tree growth and the species' ranges may be altered. In order to assess what influence climate change could exert on the distribution of pine species at their margin, radial growth trends in ring-width chronologies over the last century were analysed. In the French Mediterranean area where climate change is characterized by increased temperature, forest plots were selected along an altitudinal transect on the north-facing slope of the Sainte-Baume mountain (Bouches-du-Rhone, France) where the ranges of Pinus sylvestris and P. halepensis overlap. Two growth patterns were identified. For P. halepensis, radial growth has increased at all altitudes indicating that climate change has improved growth conditions of this species near the margin of its ecological range. For P. sylvestris, radial growth has increased only at low altitudes and even decreased at high altitudes. It must be deduced that the growth changes observed cannot be generalized either at the species level or at the geographical level and must be interpreted with great caution.
机译:一致认为,气候(降水和温度)会影响植物物种的分布。在物种自然范围的边缘附近,气候变得限制了生理过程。在那里,预计气候变化将对树木的生长产生重大影响,并且物种的范围可能会改变。为了评估气候变化可能对松树物种分布的边缘产生什么影响,分析了上个世纪环宽度年表中的径向增长趋势。在气候变化以温度升高为特征的法国地中海地区,沿着Sainte-Baume山北坡(法国,Bouches-du-Rhone,法国)的高海拔样带选择林地,其中樟子松和 P。 halepensis 重叠。确定了两种增长方式。对于 P。 halepensis ,所有海拔高度的径向生长都增加了,这表明气候变化改善了该物种在其生态范围边缘附近的生长条件。对于 P。樟子松,径向生长仅在低海拔时增加,甚至在高海拔时减少。必须推断,观察到的生长变化既不能在物种层次上也不能在地理层次上泛化,必须谨慎行事。

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