欢迎访问林业科学,今天是

林业科学 ›› 2025, Vol. 61 ›› Issue (3): 121-134.doi: 10.11707/j.1001-7488.LYKX20230622

• 研究论文 • 上一篇    下一篇

亚热带典型森林生产力及碳利用率的气候变化响应

黄云,徐黎亮,郑博福,宋旭,胡方清,朱锦奇,万炜*()   

  1. 南昌大学资源与环境学院 鄱阳湖环境与资源利用教育部重点实验室 南昌大学江西生态文明研究院 南昌 330031
  • 收稿日期:2023-12-18 出版日期:2025-03-25 发布日期:2025-03-27
  • 通讯作者: 万炜 E-mail:.wanwei@ncu.edu.cn
  • 基金资助:
    江西省教育厅科学技术研究项目(GJJ2201355);江西省重点研发计划项目(20223BBG74S01,20223BBG71013);国家自然科学基金青年科学基金项目(42301091)。

Responses of Productivity and Carbon Use Efficiency of Typical Subtropical Forests to Climate Change

Yun Huang,Liliang Xu,Bofu Zheng,Xu Song,Fangqing Hu,Jinqi Zhu,Wei Wan*()   

  1. School of Resources & Environment,Nanchang University Key Laboratory of Poyang Lake Environment and Resources Utilization of Ministry of Education Jiangxi Institute of Ecological Civilization,Nanchang University Nanchang 330031
  • Received:2023-12-18 Online:2025-03-25 Published:2025-03-27
  • Contact: Wei Wan E-mail:.wanwei@ncu.edu.cn

摘要:

目的: 研究不同森林生态系统的植被生产力及碳利用率的气候因子响应,对揭示陆地生态系统碳平衡变化规律具有重要意义,并为亚热带森林生态系统保护和管理提供科学依据。方法: 针对赣江流域常绿针叶林、常绿阔叶林、针阔混交林、竹林4种典型森林,利用参数本地化的Biome-BGC模型模拟了1970—2021年的总初级生产力(GPP)、净初级生产力(NPP),进而揭示了4种典型森林植被生产力和碳利用率在年际和月际尺度上对气候因子的响应。结果: 1)年GPP(g·m–2a–1)大小排序为常绿针叶林(2 514.6)>常绿阔叶林(2 467.9)>常绿针阔混交林(2 285.0)>竹林(2 040.1);年际尺度上,竹林GPP与积温显著正相关(r = 0.41,P<0.01);月际尺度上,4种典型森林GPP均受积温正向驱动(r > 0.99,P<0.01)。2)年NPP(g·m–2a–1)大小排序为常绿阔叶林(862.4)>竹林(739.2)>常绿针阔混交林(721.1)>常绿针叶林(681.3);年际尺度上,常绿针叶林、常绿阔叶林和常绿针阔混交林的NPP受降水正向驱动(r > 0.32,P<0.05);月际尺度上,常绿针叶林NPP与降水显著正相关(r = 0.59,P<0.05),常绿阔叶林NPP主要受积温正向驱动(r = 0.93,P<0.01)。3)碳利用率在年际和月际尺度上的大小排序均为竹林>常绿阔叶林>常绿针阔混交林>常绿针叶林。相比于NPP,碳利用率对气候变化的响应更强烈,年际和月际尺度上碳利用率均受积温负向驱动(r > 0.51,P<0.01)。结论: 总体上,积温是亚热带森林生态系统生产力和碳利用率的主要驱动因素;相较于常绿针叶林和常绿针阔混交林,常绿阔叶林和竹林的固碳能力更强,在气候变化背景下有更大的碳汇潜力。

关键词: 植被生产力, 碳利用率, 气候变化, Biome-BGC模型, 赣江流域

Abstract:

Objective: In this study, the responses of vegetation productivity and carbon use efficiency of different forest ecosystems to climate factors were investigated, which is of great significance for revealing the changes of carbon balance in terrestrial ecosystem and providing scientific basis for the protection and management of subtropical forest ecosystems. Method: Four typical forests, namely evergreen coniferous forest, evergreen broadleaf forest, evergreen conifer-broadleaf mixed forest, and bamboo forest, in the Ganjiang River Basin were targeted. The parameters localized Biome BGC model was used to simulate the gross primary productivity (GPP) and net primary productivity (NPP) from 1970 to 2021, revealing the response of productivity and carbon use efficiency of the four typical forest vegetation to climate factors at interannual and inter-monthly scales. Result: 1) The annual GPP (g·m–2a–1) was ranked as evergreen coniferous forest (2 514.6) > evergreen broadleaf forest (2 467.9) > evergreen conifer-broadleaf mixed forest (2 285.0) > bamboo forest (2 040.1). At the interannual scale, bamboo forest GPP was positively correlated with accumulated temperature (r = 0.41, P<0.01). At the inter-monthly scale, the GPP of the four typical forests was positively driven by accumulated temperature (r > 0.99, P<0.01). 2) The annual NPP (g·m–2a–1) was ranked as evergreen broadleaf forest (862.4) > bamboo forest (739.2) > evergreen conifer-broadleaf mixed forest (721.1) > evergreen coniferous forest (681.3). At the interannual scale, the NPP of evergreen coniferous forest, evergreen broadleaf forest and evergreen conifer-broadleaf mixed forest was positively driven by precipitation (r > 0.32, P<0.05). At the inter-monthly scale, there was a significant positive correlation between the NPP of evergreen coniferous forest and precipitation (r = 0.59, P<0.05). The NPP of evergreen broadleaf forest was mainly driven by accumulated temperature (r = 0.93, P<0.01). 3) The order of carbon use efficiency at the interannual and inter-monthly scales was sorted as bamboo forest > evergreen broadleaf forest > evergreen conifer-broadleaf mixed forest > evergreen coniferous forest. Compared to NPP, the carbon use efficiency had stronger response to climate change. The carbon use efficiency was negatively driven by accumulated temperature at both interannual and inter-monthly scales (r > 0.51, P<0.01). Conclusion: In summary, accumulated temperature is the main factor driving the productivity and carbon use efficiency of subtropical forest ecosystems. Compared to evergreen coniferous forest and evergreen conifer-broadleaf mixed forest, evergreen broadleaf forest and bamboo forest have stronger carbon sequestration capacity and greater carbon sink potential under the background of climate change.

Key words: vegetation productivity, carbon use efficiency, climate change, Biome-BGC model, Ganjiang River Basin

中图分类号: