Dynamic and allocation of recently assimilated carbon in Korean pine (Pinus koraiensis) and birch (Betula platyphylla) in a temperate forest
文献类型： 外文期刊
作者： Chang, Qing 1 ; Xu, Wenhua 3 ; Peng, Bo 4 ; Jiang, Ping 4 ; Li, Shanlong 3 ; Wang, Chao 4 ; Bai, Edith 1 ;
作者机构： 1.Northeast Normal Univ, Minist Educ, Key Lab Geog Proc & Ecol Secur Changbai Mt, Changchun 130024, Peoples R China
2.Northeast Normal Univ, Sch Geog Sci, Changchun 130024, Peoples R China
3.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Changchun 130033, Peoples R China
4.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China
5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China
6.Northeast Normal Univ, Changchun 130024, Peoples R China
关键词： C-13 pulse-labeling; Forest ecosystem; Photosynthate; Plant allocation; Soil carbon
期刊名称：BIOGEOCHEMISTRY （ 影响因子：4.812； 五年影响因子：5.709 ）
ISSN： 0168-2563
年卷期： 2022 年 160 卷 3 期
页码：
收录情况： SCI
摘要： Understanding how assimilated carbon (C) is allocated in forest ecosystems is crucial for process-based models and accurate prediction of global C cycling. We tracked the fate of recently assimilated C of Korean pine (Pinus koraiensis) and birch (Betula platyphylla) among various C pools in a temperate forest for 27 days using the (CO2)-C-13 pulse labeling approach. Birch had low carbon use efficiency (CUE) and allocated 66.9% of the recently assimilated C to metabolism and respiration, and had faster turnover rate of recently assimilated C in the labile pool of leaves and soil compared to pine. Pine had high CUE and allocated 12.3% of the recently assimilated C to metabolism and respiration. Our study showed that pine, as the dominate species of the climax stage, has a more conservative strategy of C use than the pioneer species birch, which may be one of the underlying mechanisms of higher soil carbon sequestration in pine forests compared to birch forests.
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