林分斑块尺度下的森林群落碳汇研究  

Carbon Sinks of Forest Community at the Forest Patch Scale

作　　者：杨婷[1] 罗红霞[2] 魏翔 YANG Ting;LUO Hongxia;WEI Xiang(School of Public Administration,Chongqing Technology and Business University,Chongqing 400076,China;School of Geographical Science,Southwest University,Chongqing 400715,China)

机构地区：[1]重庆工商大学公共管理学院,重庆400076 [2]西南大学地理科学学院,重庆400715

出　　处：《重庆工商大学学报（自然科学版）》2023年第4期106-112,共7页Journal of Chongqing Technology and Business University:Natural Science Edition

基　　金：国家自然科学基金项目(41201436).

摘　　要：针对森林碳循环过程模型空间模拟尺度多样化,但数据获取比较困难,森林碳变化响应与适应的研究不可能实现在不同生境下均安置碳通量观测系统的问题,提出利用遥感过程耦合模型定量估算动态GPP值、NPP值、RH值及NEP值等,反演森林植被群落不同优势树种碳汇/碳源情况,探寻造林、森林转化和森林人工经营管理等植被恢复措施对森林碳增汇的生态价值,激活碳源效应的促进重建作用。通过以空间代替时间的实地调查采样法和遥感模型相结合,输入GLOPEM-CEVSA模型中温度影响系数、蒸散量、水气压影响系数、二氧化碳浓度胁迫、植物呼吸及土壤呼吸等驱动因子,研究在林分斑块尺度下森林碳储量差异。研究表明:(1)从整体情况来看,林地净初级生产力>草地>农业用地>水域>建设用地,林地净生态系统生产力>农业用地>草地>建设用地>水域;(2)从年际NPP/NEP值来看,森林生态系统大部分表现为大气CO_(2)碳汇;(3)森林群落自然恢复演替中NPP值大小关系是:乔幼落叶阔叶林群落(A4)>马尾松/杉木常绿针叶林群落(A5)>柏木常绿针叶林群落(A6)>常绿灌丛/灌草丛/人工灌木群落(A2)>草本群落(A1);NEP值表现为乔幼落叶阔叶林群落>马尾松/杉木常绿针叶林群落>常绿灌丛/灌草丛/人工灌木群落>柏木常绿针叶林群落>草本群落;人工辅助演替中NPP值大小关系是(慈竹)竹林群落>马尾松/杉木常绿针叶林群落>柏木常绿针叶林群落>常绿灌丛/灌草丛/人工灌木群落;NEP值表现为(慈竹)竹林群落>马尾松/杉木常绿针叶林群落>常绿灌丛/灌草丛/人工灌木群落>柏木常绿针叶林群落,NPP值和NEP值随顺行演替均呈现出先上升后下降的单峰状发展趋势。The spatial simulation scale of forest carbon cycle process models is diverse,but the data acquisition is difficult.It is impossible to install a carbon flux observation system in different environments in the study of forest carbon change response and adaptation.In this paper,the remote sensing process coupling model was proposed to quantitatively estimate the dynamic GPP value,NPP value,RH value,and NEP value,to invert the carbon sink/carbon source situation of different dominant tree species of forest vegetation community,to explore the ecological value of vegetation restoration measures such as afforestation,forest transformation,and forest artificial management,and to activate the reconstruction effect of carbon source effect.Through the combination of field survey sampling method with space instead of time and remote sensing model,the driving factors of temperature influence coefficient,evapotranspiration,water-pressure influence coefficient,carbon dioxide concentration stress,plant respiration,and soil respiration in GLOPEM-CEVSA model were input to study the differences of forest carbon storages at the forest patch scale.The research showed that:(1)in the picture as a whole,Net Primary Productivity of Woodland>Grassland>Agricultural Land>Water Area>Construction Land,Net Ecosystem Productivity of Woodland>Agricultural Land>Grassland>Construction land>Water Area;(2)from the inter-annual NPP/NEP values,most forest ecosystems showed atmospheric CO_(2) carbon sink;(3)the relationship of NPP values in the natural restoration succession of forest community was:Deciduous Broad-Leaved Forest Community(A 4)>Pinus Massoniana/Cunninghamia Lanceolata Evergreen Coniferous Forest Community(A 5)>Cypress Evergreen Coniferous Forest Community(A 6)>Evergreen Shrub/Shrub Grass/Artificial Shrub Community(A 2)>Herbaceous Community(A 1);NEP values were as follows:Deciduous Broad-Leaved Forest Community>Pinus Massoniana/Cunninghamia Lanceolata Evergreen Coniferous Forest Community>Evergreen Shrub/Shrub Grass/Artificial Shrub Com

关 键 词：森林群落 次生演替 耦合模型 碳汇 

分 类 号：S718.5[农业科学—林学]