IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Stem CO2 efflux of Abies fabri in subalpine forests in the Gongga Mountains, Eastern Tibetan Plateau
Zhao, Guang1,2; Liu, Gangcai1; Zhu, Wanze1; Zhao, Jixia1,2; Wang, Xuemei1,2; Wang, Yaoyao1,2; Jia, Min1,2
2017
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
EISSN1752-993X
Volume10Issue:6Pages:1001-1011
SubtypeArticle
Contribution Rank1
AbstractAims Despite the importance of stem CO2 efflux (E-s) in ecosystem carbon cycling and energy balance, little is known about temporal variation in the temperature coefficient (Q(10)) and sapwood nitrogen concentrations ([N]) and their intrinsic links with E-s. The objectives of this study were: (i) to examine the response of E-s to temperature in a subalpine region and (ii) to explore the influence of stem diameter and [N] on E-s. Also, we will test the hypothesis that (i) E-s in trees has thermal acclimation and (ii) E-s will be well correlated with diameter at breast height (DBH) and [N]. Methods Here, a horizontally oriented soil chamber technique was applied to measure E-s of Abies fabri in two subalpine forest stands in Southwestern China from May to December 2014. We also examined the variability in E-s, Q(10) and [N] in trees and monitored the relationship between temperature, [N], DBH and E-s. Important Findings During the measurement period, E-s showed an apparent seasonal trend, following the change in air temperature, increasing from May and peaking in July, then continuously decreasing until December. The mean E-s for the growing and dormant seasons were 1.45 and 0.25 mu mol.m(-2).s(-1), respectively, and E-s in the mature forest was significantly higher than in the immature forest. The area-based E-s was positively correlated with DBH and sapwood width (SW), while volume-based E-s showed negative relationship with DBH and SW. Across the five diameter classes, 69.8-89.0% of the variation in E-s could be explained by air temperature. The temperature sensitivity (Q(10)) of E-s ranged from 2.98 to 5.61 during the measurement period, with a higher Q(10) appearing in the growing season than in the dormant season. There was a significant linear relationship (P < 0.01) between [N] and E-s (expressed based on two different units). Additionally, exponential models of E-s against [N] and air temperature were applied to estimate E-s.
Keywordstem CO2 efflux Q(10) DBH sapwood nitrogen contents subalpine forests
DOI10.1093/jpe/rtw100
Indexed BySCI
WOS KeywordNORWAY SPRUCE TREES ; MAINTENANCE RESPIRATION RATES ; JAPANESE RED PINE ; WOODY-TISSUE ; PLANT RESPIRATION ; RAIN-FOREST ; CONTRASTING CLIMATES ; SEASONAL-VARIATIONS ; ROOT RESPIRATION ; CARBON-DIOXIDE
Language英语
Quartile3区
Funding ProjectNational Nature Science Foundation of China[41471232] ; Knowledge Innovation Priority Project of the Chinese Academy of Sciences[KZCX2-EW-309]
TOP
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology
WOS SubjectPlant Sciences ; Ecology
WOS IDWOS:000417978400012
Funding OrganizationNational Nature Science Foundation of China ; Knowledge Innovation Priority Project of the Chinese Academy of Sciences
PublisherOXFORD UNIV PRESS
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20716
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
Corresponding AuthorZhu, Wanze
Affiliation1.Chinese Acad Sci & Minist Water Resources, Inst Mt Hazards & Environm, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Guang,Liu, Gangcai,Zhu, Wanze,et al. Stem CO2 efflux of Abies fabri in subalpine forests in the Gongga Mountains, Eastern Tibetan Plateau[J]. JOURNAL OF PLANT ECOLOGY,2017,10(6):1001-1011.
APA Zhao, Guang.,Liu, Gangcai.,Zhu, Wanze.,Zhao, Jixia.,Wang, Xuemei.,...&Jia, Min.(2017).Stem CO2 efflux of Abies fabri in subalpine forests in the Gongga Mountains, Eastern Tibetan Plateau.JOURNAL OF PLANT ECOLOGY,10(6),1001-1011.
MLA Zhao, Guang,et al."Stem CO2 efflux of Abies fabri in subalpine forests in the Gongga Mountains, Eastern Tibetan Plateau".JOURNAL OF PLANT ECOLOGY 10.6(2017):1001-1011.
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