Received: 23 May 2018 – Accepted for review: 01 Jun 2018 – Discussion started: 07 Jun 2018
Abstract. There are four components of carbon (C) pools in a natural forest ecosystem: vegetation, soil, litter and woody debris. Quantifying these C pools and their contributions to forest ecosystems is important in understanding C cycling in forests. Here, we investigated these four C pools in nine beech (Fagus L., Fagaceae) forests along an altitudinal gradient in southwest China. We found that the C pools of beech forest ecosystems ranged from 190.7 to 503.9 Mg C ha−1, mainly attributed to vegetation C (accounting for 33.7–73.9 %) and soil C (accounting for 24.6–65.4 %). No more than 4 % of ecosystem C pools were stored in woody debris (0.25–3.4 %) and litter (0.2–0.7 %). Ecosystem C storage increased significantly with altitude, where the vegetation and woody debris C pools increased concomitantly with increasing altitude, while those of litter and soil exhibited no significant variations. The forest stand age was found to be a key driver of such altitudinal patterns, especially for vegetation C storage. The present study provides reliable data for understanding the structure and function of Chinese beech forests, and emphasizes the importance of considering the influence of stand age on C accumulation.
This preprint has been withdrawn.
How to cite. Cai, Q., Ji, C., Zhou, X., Fang, W., Zheng, T., Zhu, J., Shi, L., Li, H., Zhu, J., and Fang, J.: Changes in carbon stocks of Fagus forest ecosystems along an altitudinal gradient on Mt. Fanjingshan in Southwest China, Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2018-242, 2018.
Quantifying different carbon (C) pools in forest ecosystems is important in understanding C cycling in forests. However, the C pools of Chinese beech (Fagus) forests have seldom been studied. Here, the altitudinal patterns of four C pools in beech forests in Southwest China were investigated, and the stand age was proved to be a key factor shaping such patterns. Thus, this study provides data for understanding Chinese beech forests and stresses the importance of stand age in C accumulation.
Quantifying different carbon (C) pools in forest ecosystems is important in understanding C...