EGU21-5365, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-5365
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Tree-rings δ13C different responses to environmental factors in angiosperms and gymnosperms at global scale

Xiaozhen Li1, Guo Chen1,2, Wenyi Qin1, Peng Wang2, and Xiang Wang1
Xiaozhen Li et al.
  • 1Chengdu University of Technology, College of Earth Sciences, Department of Space Technology, China (lixiaozhen@stu.cdut.edu.cn)
  • 2Colleague of Ecology and Environment, Chengdu University of Technology, Chengdu, Sichuan, China (chenguo17@cdut.edu.cn)

Tree-rings, was an extraordinary information base of climate. The global climatic change has been modifying ecosystem, it is important to understand mechanism of how plants respond to climate change. The carbon isotope composition of tree-rings corrected to the value before industrial revolution (δ13Cring) can provide climatic information and carbon and water balance relationship of plants. However, it was still a challenge to disentangle the influence of different environmental parameters on δ13Cring among different tree types. We collected published data of δ13Cring from published papers and study how angiosperms and gymnosperms responsed to different environmental parameters. The results showed that the δ13Cring of angiosperms and gymnosperms were significantly different and there was a decrasing trend in δ13Cring of angiosperms and gymnosperms. In this study, we found that atmospheric concentration (Ca) was not the mainly factor to influence the δ13Cring, and the MAT and PRE were the most important environmental parameters to influence the decreasing trend of δ13Cring for angiosperms and gymnosperms, respectively. Additionally, the global isoscapes of δ13Cring were not established, in this study, three machine learning methods to predict the spatial distribution of δ13Cring were done, the results showed that RF was the best model to established the isoscapes of δ13Cring.

How to cite: Li, X., Chen, G., Qin, W., Wang, P., and Wang, X.: Tree-rings δ13C different responses to environmental factors in angiosperms and gymnosperms at global scale, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-5365, https://doi.org/10.5194/egusphere-egu21-5365, 2021.

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