1. Response of radial growth to warming and CO enrichment in southern Northeast China: a case of Pinus tabulaeformis.
- Author
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Chen, Zhenju, Zhang, Xianliang, He, Xingyuan, Davi, Nicole, Li, Lulu, and Bai, Xueping
- Subjects
PINE ,ATMOSPHERIC carbon dioxide ,DENDROCHRONOLOGY ,CLIMATE change ,ECOSYSTEMS ,PLANT growth - Abstract
The southern part of northeast China has experienced a marked warming and drying climate. We provide dendrochronological evidence for atmospheric CO 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 °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 °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 CO concentrations have a positive effect on tree growth. This effect can be detected with conventional dendrochronological methods. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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