Effect of Climate Change on CO 2 Flux in Temperate Grassland, Subtropical Artificial Coniferous Forest and Tropical Rain Forest Ecosystems

Zihao Man, Shengquan Che, Changkun Xie, Ruiyuan Jiang, Anze Liang and Hao Wu
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Zihao Man: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
Shengquan Che: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
Changkun Xie: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
Ruiyuan Jiang: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
Anze Liang: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China
Hao Wu: School of Design, Shanghai Jiao Tong University, Shanghai 200240, China

IJERPH, 2021, vol. 18, issue 24, 1-18

Abstract: The interactions between CO 2 flux, an important component of ecosystem carbon flux, and climate change vary significantly among different ecosystems. In this research, the inter-annual variation characteristics of ecosystem respiration (RE), gross ecosystem exchange (GEE), and net ecosystem exchange (NEE) were explored in the temperate grassland (TG) of Xilinhot (2004–2010), the subtropical artificial coniferous forest (SACF) of Qianyanzhou (2003–2010), and the tropical rain forest (TRF) of Xishuangbanna (2003–2010). The main factors of climate change affecting ecosystem CO 2 flux were identified by redundancy analysis, and exponential models and temperature indicators were constructed to consider the relationship between climate change and CO 2 flux. Every year from 2003 to 2010, RE and GEE first increased and then decreased, and NEE showed no significant change pattern. TG was a carbon source, whereas SACF and TRF were carbon sinks. The influence of air temperature on RE and GEE was greater than that of soil temperature, but the influence of soil moisture on RE and GEE was greater than that of air moisture. Compared with moisture and photosynthetically active radiation, temperature had the greatest impact on CO 2 flux and the exponential model had the best fitting effect. In TG and SACF, the average temperature was the most influential factor, and in TRF, the accumulated temperature was the most influential factor. These results provide theoretical support for mitigating and managing climate change and provide references for achieving carbon neutrality.

Keywords: CO 2 flux; gross ecosystem exchange; ecosystem respiration; temperature; moisture; climate change; carbon neutrality (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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