气候变化领域集成服务门户(CCPortal): Rainfall characteristics determine respiration rate of biological soil crusts in drylands

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DOI	10.1016/j.ecolind.2021.107452
	Rainfall characteristics determine respiration rate of biological soil crusts in drylands
	Zhao, Yang; Zhang, Peng
通讯作者	Zhao, Y (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, 320 Donggang West Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1470-160X
EISSN	1872-7034
卷号	124
英文摘要	Altering precipitation regimes are of particular concern in drylands, where isolated rainfall events often drive ecosystem structure and function. This study aims to explore the effects of varying individual rainfall amount on the release of CO2 by biological soil crusts (biocrusts), which are dominant biotic components and play key roles in drylands, in different climate zones. For a field experiment, we sourced algal crust (early succession) and moss crust (later succession) from sites across the main arid and semi-arid regions of northern China along a precipitation gradient ranging from 180 mm in Tengger Desert to 390 mm in Mu Us Sandland. Then we measured the post rainfall CO2 release rates in response to five rainfall magnitudes (0-2, 2-5, 5-10, 10-20, 5 mm) will lead to an increase in C release from biocrusts, but an increase in larger rainfall events (>20 mm) may lead to less variation in C release from algal crust-dominated regions and to increasing heterogeneity in C release from moss crust-dominated regions. This indicates that C-release amount from biocrust-covered regions may be easily changed by altering the number of individual rainfall events, even if the total annual rainfall amount stays the same. Further, how biocrusts in different successional stages respond to changes in rainfall regimes will be an important determinant of future C release patterns in drylands. These changes may even result in changing the way biocrusts contribute to the function of desert ecosystems. The current analyses also have important implications regarding changes in rainfall regimes that in turn change C release patterns in biocrust-covered regions.
关键词	PRECIPITATION PULSES CARBON RELEASE CO2 EFFLUX DESERT EXCHANGE COMMUNITIES TEMPERATURE PATTERNS CLIMATE FLUX
英文关键词	Algal crust; Coefficient of variation; Desert ecosystem; Moss crust; Individual rainfall event; Changing rainfall regimes
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:000624338300004
来源期刊	ECOLOGICAL INDICATORS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253812
作者单位	[Zhao, Yang; Zhang, Peng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, 320 Donggang West Rd, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yang,Zhang, Peng. Rainfall characteristics determine respiration rate of biological soil crusts in drylands[J]. 中国科学院西北生态环境资源研究院,2021,124.
APA	Zhao, Yang,&Zhang, Peng.(2021).Rainfall characteristics determine respiration rate of biological soil crusts in drylands.ECOLOGICAL INDICATORS,124.
MLA	Zhao, Yang,et al."Rainfall characteristics determine respiration rate of biological soil crusts in drylands".ECOLOGICAL INDICATORS 124(2021).