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Interactive effects of seasonal drought and nitrogen deposition on carbon fluxes in a subtropical evergreen coniferous forest in the East Asian monsoon region
Li, Pan1,2; Zhang, Li3,4; Yu, Guirui3,4; Liu, Congqiang1; Ren, Xiaoli3; He, Honglin3,4; Liu, Min5; Wang, Huimin3; Zhu, Jianxing3; Ge, Rong3; Zeng, Na3
2018-12-15
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
Volume263Pages:90-99
Corresponding AuthorZhang, Li(li.zhang@igsnrr.ac.cn) ; Yu, Guirui(yugr@igsnrr.ac.cn)
AbstractSubtropical forests in the East Asian monsoon region function as considerable carbon sinks in the Northern Hemisphere. Forest ecosystems in this region have experienced intensified seasonal drought that has limited their carbon sequestration capacity, but increasing atmospheric nitrogen deposition has contrarily enhanced their capacity to act as carbon sinks. Understanding and quantifying the interactive effects of seasonal drought and nitrogen deposition on the carbon sequestration of subtropical forests is of great significance for accurately predicting future changes to the terrestrial carbon cycle. In this study, we used the Community Land Model Version 4.5 (CLM4.5) to investigate how carbon fluxes, i.e. gross primary productivity (GPP), ecosystem respiration (Re), and net ecosystem productivity (NEP), respond to seasonal drought and nitrogen deposition in an evergreen coniferous forest in southern China. Our results showed that reduced GPP during the drought in the summers of 2003 and 2007 weakened the forest's carbon sequestration capacity. The reduction in GPP mainly occurred at the sunlit canopy due to its higher sensitivity to soil water stress, and non-stomatal limitations played an important role in limiting leaf photosynthesis. The enhanced NEP by nitrogen deposition was attributed to increased plant growth, which could, in turn, be attributed to increases in leaf area. Interactions of seasonal drought and nitrogen deposition varied with drought severity. Interactive effects of the two drivers on GPP, Re, and NEP were additive under mild and moderate drought conditions but non-additive under severe drought. Their net effects on NEP shifted from + 29% under mild and moderate drought conditions to -56% under severe drought. Our study highlights the importance of accounting for the interactive effects of seasonal drought and nitrogen deposition in assessing the carbon sequestration of subtropical forest ecosystems in the East Asian monsoon region.
KeywordCLM4.5 Carbon fluxes Seasonal drought Nitrogen deposition Interactive effects
DOI10.1016/j.agrformet.2018.08.009
WOS KeywordWATER-USE EFFICIENCY ; TERRESTRIAL ECOSYSTEMS ; MESOPHYLL CONDUCTANCE ; PRIMARY PRODUCTIVITY ; STOMATAL CONDUCTANCE ; SOUTHEASTERN CHINA ; SOIL-WATER ; PHOTOSYNTHESIS ; PLANTATION ; MODEL
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0500204] ; National Basic Research Program of China[2015CB954102] ; National Natural Science Foundation of China[31420103917] ; National Natural Science Foundation of China[41571130043] ; National Natural Science Foundation of China[31290221]
Funding OrganizationNational Key Research and Development Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:000449236500008
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52559
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Li; Yu, Guirui
Affiliation1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
5.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Shanghai 200241, Peoples R China
Recommended Citation
GB/T 7714
Li, Pan,Zhang, Li,Yu, Guirui,et al. Interactive effects of seasonal drought and nitrogen deposition on carbon fluxes in a subtropical evergreen coniferous forest in the East Asian monsoon region[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,263:90-99.
APA Li, Pan.,Zhang, Li.,Yu, Guirui.,Liu, Congqiang.,Ren, Xiaoli.,...&Zeng, Na.(2018).Interactive effects of seasonal drought and nitrogen deposition on carbon fluxes in a subtropical evergreen coniferous forest in the East Asian monsoon region.AGRICULTURAL AND FOREST METEOROLOGY,263,90-99.
MLA Li, Pan,et al."Interactive effects of seasonal drought and nitrogen deposition on carbon fluxes in a subtropical evergreen coniferous forest in the East Asian monsoon region".AGRICULTURAL AND FOREST METEOROLOGY 263(2018):90-99.
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