Characteristics of Soil Respiration and Its Components of a Mixed Dipterocarp Forest in China

doi:10.3390/f12091159

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 2012年后新成立研究组

	Characteristics of Soil Respiration and Its Components of a Mixed Dipterocarp Forest in China
	Zhao, Jun-Fu ; Liao, Zhi-Yong ; Yang, Lian-Yan ; Shi, Jian-Kang ; Tan, Zheng-Hong
刊名	FORESTS
	2021
卷号	12 期号:9 页码:-
关键词	microhabitat diurnal pattern temperature sensitivity moisture carbon sink
ISSN号	1999-4907
DOI	10.3390/f12091159
英文摘要	Background: Although numerous studies have been carried out in recent decades, soil respiration remains one of the less understood elements in global carbon budget research. Tropical forests store a considerable amount of carbon, and a well-established knowledge of the patterns, components, and controls of soil respiration in these forests will be crucial in global change research. Methods: Soil respiration was separated into two components using the trenching method. Each component was measured at multiple temporal scales and in different microhabitats. A commercial soil efflux system (Li8100/8150) was used to accomplish soil respiration monitoring. Four commonly used models were compared that described the temperature dependence of soil heterotrophic respiration using nonlinear statistics. Results and Conclusions: Trenching has a limited effect on soil temperature but considerably affects soil water content due to the exclusion of water loss via tree transpiration. Soil respiration decreased gradually from 8 to 4 mu mol center dot m(-2)center dot s(-1) 6 days after trenching. Soil autotrophic (R-a) and heterotrophic respiration (R-h) have contrasting diel patterns and different responses to temperature. R-h was negatively correlated with temperature but positively correlated with relative humidity. Both R-a and R-h varied dramatically among microhabitats. The Q(10) value of R-h derived using the Q(10) model was 2.54. The Kirschbaum-O'Connell model, which implied a strong decrease of Q(10) with temperature, worked best in describing temperature dependence of R-h. Heterotrophic respiration accounted for nearly half of the total soil efflux. We found an unexpected diurnal pattern in soil heterotrophic respiration which might be related to diurnal moisture dynamics. Temperature, but not soil moisture, was the major controller of seasonal variation of soil respiration in both autotrophic and heterotrophic components. From a statistical perspective, the best model to describe the temperature sensitivity of soil respiration was the Kirschbaum-O'Connell model. Soil respiration varied strongly among the microhabitats and played a crucial role in stand-level ecosystem carbon balance assessment.
学科主题	Forestry
语种	英语
WOS记录号	WOS:000699795700001
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/12354]
专题	西双版纳热带植物园_2012年后新成立研究组
作者单位	1.[Zhao, Jun-Fu 2.Yunnan Univ, Sch Ecol & Environm Sci, 2 North Cuihu Rd, Kunming 650091, Yunnan, Peoples R China 3.Hainan Univ, Sch Ecol & Environment, Ecol Program, Haikou 570228, Hainan, Peoples R China 4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Mengla 666303, Peoples R China 5.Hainan Prov Ecol & Environm Monitoring Ctr, Haikou 571126, Hainan, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Jun-Fu,Liao, Zhi-Yong,Yang, Lian-Yan,et al. Characteristics of Soil Respiration and Its Components of a Mixed Dipterocarp Forest in China[J]. FORESTS,2021,12(9):-.
APA	Zhao, Jun-Fu,Liao, Zhi-Yong,Yang, Lian-Yan,Shi, Jian-Kang,&Tan, Zheng-Hong.(2021).Characteristics of Soil Respiration and Its Components of a Mixed Dipterocarp Forest in China.FORESTS,12(9),-.
MLA	Zhao, Jun-Fu,et al."Characteristics of Soil Respiration and Its Components of a Mixed Dipterocarp Forest in China".FORESTS 12.9(2021):-.