干旱区生态环境知识资源中心(Arid): Hydrologic gradient changes of soil respiration in typical steppes of Eurasia

Arid

DOI	10.1016/j.scitotenv.2021.148684
	Hydrologic gradient changes of soil respiration in typical steppes of Eurasia
	Li, Mingyang; Liu, Tingxi; Duan, Limin; Ma, Long; Wang, Yixuan; Zhou, Yajun; Li, Yuankang; Zhao, Xinyu; Wang, Xueqin; Wang, Guoqiang; Lei, Huimin
通讯作者	Liu, TX (corresponding author), Inner Mongolia Agr Univ, Water Conservancy & Civil Engn Coll, Inner Mongolia Water Resource Protect & Utilizat, Hohhot 010018, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	794
英文摘要	Soil respiration (R-S) is affected by many factors and shows significant diurnal and seasonal changes at different spatial and temporal scales. However, in a semi-arid steppe, the mechanism of the dynamic influence of environmental factors on R-S is not clear, and the effect of subtle changes of soil water on R-S under drought stress is yet to be explored. Therefore, Xilin River Basin, was the study area and a hydrological gradient on the four ecosystems for R-S and hydrometeorological monitoring was selected. We proposed the use of dynamic sunrise and sunset time to distinguish day from night and determine related statistics. Additionally, we analyzed the temporal variation of R-S and its response process and mechanism for hydrometeorological factors during the growing season and at daily scales. Further, we quantitatively simulated the R-S of 594 scenarios in different growing season stages, ecosystems, and precipitation patterns. Results showed that: (1) in the hydrological gradient belt, different ecosystems exhibited the same trend but different characteristics of R-S regulation. From May to November 2020, R-S was 2.34-3.89, 1.89-5.97, 1.90-5.27 and 2.29-3.45 gC m(-2) day(-1) for the four ecosystems. (2) The use of dynamic sunrise and sunset time to distinguish day and night can more accurately describe the statistical value of each variable, which exhibits remarkable feasibility in daily scale research. (3) The changes in R-S were adequately explained by temperature at various time scales, and the photosynthetically active radiation was positively correlated with R-S at the daily scale. The special soil water content (M-S) condition in the study area was not sufficient to explain R-S. (4) Precipitation can affect R-S by changing soil and air; however, only when precipitation exceeds the effective precipitation threshold of 0.6 +/- 0.3 mm, it significantly affects R-S. (C) 2021 Published by Elsevier B.V.
英文关键词	Effective precipitation Temporal variation Growing seasons Temperature Xilingol
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000691675400001
WOS关键词	PHOTOSYNTHETICALLY ACTIVE RADIATION ; TEMPERATURE SENSITIVITY ; SEASONAL-VARIATIONS ; ORGANIC-CARBON ; GRASSLAND ; FOREST ; HYSTERESIS ; ECOSYSTEM ; DYNAMICS ; EXCHANGE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京师范大学 ; 清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368176
作者单位	[Li, Mingyang; Liu, Tingxi; Duan, Limin; Ma, Long; Wang, Yixuan; Zhou, Yajun; Li, Yuankang; Zhao, Xinyu; Wang, Xueqin] Inner Mongolia Agr Univ, Water Conservancy & Civil Engn Coll, Inner Mongolia Water Resource Protect & Utilizat, Hohhot 010018, Peoples R China; [Wang, Guoqiang] Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China; [Lei, Huimin] Tsinghua Univ, State Key Lab Fydrosci & Engn, Dept Hydraul Engn, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Li, Mingyang,Liu, Tingxi,Duan, Limin,et al. Hydrologic gradient changes of soil respiration in typical steppes of Eurasia[J]. 北京师范大学, 清华大学,2021,794.
APA	Li, Mingyang.,Liu, Tingxi.,Duan, Limin.,Ma, Long.,Wang, Yixuan.,...&Lei, Huimin.(2021).Hydrologic gradient changes of soil respiration in typical steppes of Eurasia.SCIENCE OF THE TOTAL ENVIRONMENT,794.
MLA	Li, Mingyang,et al."Hydrologic gradient changes of soil respiration in typical steppes of Eurasia".SCIENCE OF THE TOTAL ENVIRONMENT 794(2021).