植物生态学报 ›› 2018, Vol. 42 ›› Issue (7): 703-712.DOI: 10.17521/cjpe.2018.0064

• 研究论文 •    下一篇

贵州月亮山不同演替阶段亮叶水青冈林碳储量及其分配格局

周序力,蔡琼,熊心雨,方文静,朱剑霄,朱江玲,方精云,吉成均()   

  1. 北京大学城市与环境学院, 北京大学地表过程分析与模拟教育部重点实验室, 北京 100871
  • 出版日期:2018-07-20 发布日期:2018-06-01
  • 通讯作者: 吉成均
  • 基金资助:
    国家重点研发计划项目(2017YFA0605101);国家科技基础性工作专项(2015FY210200);国家自然科学基金(31700374)

Ecosystem carbon stock and within-system distribution in successional Fagus lucida forests in Mt. Yueliang, Guizhou, China

ZHOU Xu-Li,CAI Qiong,XIONG Xin-Yu,FANG Wen-Jing,ZHU Jian-Xiao,ZHU Jiang-Ling,FANG Jing-Yun,JI Cheng-Jun()   

  1. College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China
  • Online:2018-07-20 Published:2018-06-01
  • Contact: Cheng-Jun JI
  • Supported by:
    Supported by the National Key Research and Development Program of China(2017YFA0605101);the National Science and Technology Basic Project of China(2015FY210200);the National Natural Science Foundation of China(31700374)

摘要:

林龄对森林生态系统碳储量及其在不同碳组分(植被、木质残体、凋落物和土壤)中的分配有着重要影响。亚热带森林在陆地生态系统碳循环中起着重要作用, 水青冈属(Fagus)植物是我国亚热带广泛分布的重要树种, 而有关水青冈林碳储量随林龄变化的研究在我国鲜有报道。该研究选取贵州月亮山3个演替阶段(林龄分别为33年、82年和208年)的亮叶水青冈(Fagus lucida)林为研究对象, 对其生态系统全组分的碳储量及其分配格局进行了调查与估算。研究发现, 随林龄增加, 亮叶水青冈林生态系统碳储量显著增加, 33年、82年和208年林分别为(186.9 ± 46.0)、(265.8 ± 82.3)和(515.1 ± 176.4) Mg·hm -2, 且生态系统碳储量的增加主要由植被碳储量(占比由32%增长至79%)贡献。凋落物与木质残体碳储量随林龄增加亦呈增加趋势, 但二者占生态系统碳储量的比例很小(<1%)。而不同林龄土壤碳储量无显著差异, 其占比由33年林的67%降至208年林的20%。这些结果验证了林龄对森林生态系统各组分碳储量及其分配的重要影响, 同时指出干扰和土地利用历史等对森林植物残体和土壤碳积累的重要作用。

关键词: 碳储量, 亮叶水青冈林, 林龄, 植被, 土壤, 凋落物, 木质残体

Abstract:

Aims Stand age plays a vital role in carbon (C) stock and its distribution (vegetation, woody debris, litter and soil) within forest ecosystems. Subtropical forests are pivotal in the C cycling of terrestrial ecosystems. In subtropical China, Fagus trees are widely distributed and of great importance. However, the analyses of C storage in chronosequent Fagus forests have not been well performed.

Methods Nine Fagus lucida forests at three succession stages (33, 82 and 208 year-old) were studied in Mt. Yueliang, Guizhou Province, and their C stocks and distributions within the forests were investigated and estimated.

Important findings Ecosystem C stock increased significantly with increasing stand age, which was (186.9 ± 46.0), (265.8 ± 82.3) and (515.1 ± 176.4) Mg·hm-2 in the 33, 82 and 208 year-old forests, respectively. The increase in the C stock appeared mainly attributed from increase in vegetation C stocks that accounted for 32%-79% of the total C stock. The woody debris and litter carbon stocks also increased significantly with increasing stand age, but accounted for <1% of the total C stock. While soil C stock showed no significant change with increasing stand age, it decreased its contribution to the total C stock (from 67% to 20%). These results confirmed the importance of stand age on C storage and the dynamic reallocations in the subtropical forests. Results from this study also added additional evidences in understanding the significance of disturbance and land use in C accumulation.

Key words: carbon stock, Fagus lucida forests, stand age, vegetation, soil, litter, woody debris