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首页> 外文期刊>Climatic Change >Response of radial growth to warming and CO2 enrichment in southern Northeast China: a case of Pinus tabulaeformis
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Response of radial growth to warming and CO2 enrichment in southern Northeast China: a case of Pinus tabulaeformis

机译：中国东北南部径向生长对变暖和CO2富集的响应：以油松为例

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摘要

The southern part of northeast China has experienced a marked warming and drying climate. We provide dendrochronological evidence for atmospheric CO2 fertilization and the impacts of warming on Chinese pine (Pinus tabulaeformis) growth. The results of this study show that increased temperature has a negative effect on pine growth during a major part of the growing season and a weakly positive effects on growth during the remaining portion of the year. The monthly temperatures explain ca. 20 % of the total variance in the annual radial growth of Chinese pine from 1901 to 2009. An increase of approximately 3-5 A degrees C is the maximum that Chinese pine can tolerate in this region with an annual rainfall of 500-700 mm. Our results suggest a that there is a proportional response to warming only up to a maximum of 1 A degrees C warming, and indicate the complexitiesof succession in forest ecosystems in terms of adaptation and evolution in local pine populations under a rapid warming condition. In addition, increasing atmospheric CO2 concentrations have a positive effect on tree growth. This effect can be detected with conventional dendrochronological methods.
机译：东北南部经历了明显的变暖和干燥气候。我们提供了大气CO2施肥以及变暖对油松（Pinus tabulaeformis）生长的影响的年代学证据。这项研究的结果表明，在生长期的大部分时间里，温度升高对松树的生长有负面影响，而在一年中的剩余时间里，温度升高对松木的生长具有弱的正面影响。每月的温度解释大约。从1901年到2009年，中国松树的年径向总变化量的20％。在该地区，每年降雨500-700 mm，松树可以忍受的最高温度升高约3-5A。我们的研究结果表明，仅在最高1 A的温度下，变暖才有比例响应，并且表明在快速变暖条件下，森林生态系统演替的复杂性就其在当地松树种群的适应和进化而言。此外，大气中二氧化碳浓度的增加对树木的生长也有积极作用。可以用常规的年代学方法检测这种效果。

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