林业科学2025，Vol.61Issue(3)：121-134,14.DOI:10.11707/j.1001-7488.LYKX20230622
亚热带典型森林生产力及碳利用率的气候变化响应
Responses of Productivity and Carbon Use Efficiency of Typical Subtropical Forests to Climate Change
摘要
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.关键词
植被生产力/碳利用率/气候变化/Biome-BGC模型/赣江流域Key words
vegetation productivity/carbon use efficiency/climate change/Biome-BGC model/Ganjiang River Basin分类
农业科技引用本文复制引用
黄云,徐黎亮,郑博福,宋旭,胡方清,朱锦奇,万炜..亚热带典型森林生产力及碳利用率的气候变化响应[J].林业科学,2025,61(3):121-134,14.基金项目
江西省教育厅科学技术研究项目(GJJ2201355) （GJJ2201355）
江西省重点研发计划项目(20223BBG74S01,20223BBG71013) （20223BBG74S01,20223BBG71013）
国家自然科学基金青年科学基金项目(42301091). （42301091）
