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Spatial and seasonal variation in soil respiration along a slope in a rubber plantation and a natural forest in Xishuangbanna, Southwest China
Zhao, Yong-li1,2; Goldberg, Stefanie D.1,3; Xu, Jian-chu1,3; Harrison, Rhett D.1,3,4
2018-04-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume15Issue:4Pages:695-707
Abstract

Soil respiration is a key component of the global carbon cycle, and even small changes in soil respiration rates could result in significant changes in atmospheric CO2 levels. The conversion of tropical forests to rubber plantations in SE Asia is increasingly common, and there is a need to understand the impacts of this land-use change on soil respiration in order to revise CO2 budget calculations. This study focused on the spatial variability of soil respiration along a slope in a natural tropical rainforest and a terraced rubber plantation in Xishuangbanna, Southwest (SW) China. In each land-use type, we inserted 105 collars for soil respiration measurements. Research was conducted over one year in Xishuangbanna during May, June, July and October 2015 (wet season) and January and March 2016 (dry season). The mean annual soil respiration rate was 30% higher in natural forest than in rubber plantation and mean fluxes in the wet and dry season were 15.1 and 9.5 Mg C ha(-1) yr(-1) in natural forest and 11.7 and 5.7 Mg C ha(-1) yr(-1) in rubber plantation. Using a linear mixed effects model to assess the effect of changes in soil temperature and moisture on soil respiration, we found that soil temperature was the main driver of variation in soil respiration, explaining 48% of its seasonal variation in rubber plantation and 30% in natural forest. After including soil moisture, the model explained 70% of the variation in soil respiration in natural forest and 76% in rubber plantation. In the natural forest slope position had a significant effect on soil respiration, and soil temperature and soil moisture gradients only partly explained this correlation. In contrast, soil respiration in rubber plantation was not affected by slope position, which may be due to the terrace structure that resulted in more homogeneous environmental conditions along the slope. Further research is needed to determine whether or not these findings hold true at a landscape level.

KeywordSoil Respiration Tropical Rain Forest Rubber Plantation Land-use Change Carbon Cycle Transect
DOI10.1007/s11629-017-4478-9
Language英语
WOS IDWOS:000429949900002
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/60497
Collection资源植物与生物技术所级重点实验室
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Ctr Mt Ecosyst Studies, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.World Agroforestry Ctr, East & Cent Asia, Kunming 650201, Yunnan, Peoples R China
4.World Agroforestry Ctr, East & Southern Africa Reg, 13 Elm Rd, Lusaka, Zambia
Recommended Citation
GB/T 7714
Zhao, Yong-li,Goldberg, Stefanie D.,Xu, Jian-chu,et al. Spatial and seasonal variation in soil respiration along a slope in a rubber plantation and a natural forest in Xishuangbanna, Southwest China[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(4):695-707.
APA Zhao, Yong-li,Goldberg, Stefanie D.,Xu, Jian-chu,&Harrison, Rhett D..(2018).Spatial and seasonal variation in soil respiration along a slope in a rubber plantation and a natural forest in Xishuangbanna, Southwest China.JOURNAL OF MOUNTAIN SCIENCE,15(4),695-707.
MLA Zhao, Yong-li,et al."Spatial and seasonal variation in soil respiration along a slope in a rubber plantation and a natural forest in Xishuangbanna, Southwest China".JOURNAL OF MOUNTAIN SCIENCE 15.4(2018):695-707.
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