气候变化领域集成服务门户(CCPortal): Divergent responses of moss- and lichen-dominated biocrusts to warming and increased drought in arid desert regions

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DOI	10.1016/j.agrformet.2021.108387
	Divergent responses of moss- and lichen-dominated biocrusts to warming and increased drought in arid desert regions
	Li, Xinrong; Hui, Rong; Zhang, Peng; Song, Naiping
通讯作者	Li, XR (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource Res, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China. ; Li, XR (通讯作者)，Ningxia Univ, Breeding Base Key Lab Land Degradat & Ecol Restor, Yinchuan 750021, Ningxia, Peoples R China.
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	303
英文摘要	Global warming coupled with increased drought is predicted to have a significant negative impact on desert ecosystems. In arid desert regions, a large proportion of the ground surface is covered by specialized organisms such as mosses and lichens that form biocrusts, which play a vital role in ecosystems. However, the long-term effects of warming and drought on these key biotic components of desert ecosystems remain poorly understood. Using a manipulative experiment conducted for 12 years in the Tengger Desert, northwestern China, we evaluated how both mosses and lichens in biocrust communities responded to 0.5 degrees C and 1.5 degrees C increases in temperature coupled with 5% and 8% reductions in total annual precipitation, respectively, using two groups of open-top chambers to approximate climate change conditions that are predicted to occur in this study region. Furthermore, surface soil carbon uptake by the biocrusts was also evaluated. Twelve years of warming coupled with increased drought resulted in a significant decrease in the cover and biomass of mosses but did not change the cover or biomass of lichens. These changes in the mosses were positively correlated with the duration and intensity of the treatments. Warming coupled with reduced precipitation significantly reduced the carbon uptake of the moss-dominated biocrusts by reducing the availability of moisture content. However, lichen carbon uptake was insensitive to the warming and reduced precipitation treatments. The reduction in cover and biomass of moss-dominated biocrusts might be attributed to large amounts of carbon loss, which further alters biocrust multifunctionality in desert ecosystems. In addition, our findings suggest that coupled warming and drought conditions could increase the dominance of lichens in biocrust communities to partly maintain the multifunctionality of biocrusts in this desert ecosystem.
关键词	BIOLOGICAL SOIL CRUSTS CLIMATE-CHANGE NITROGEN-FIXATION TENGGER DESERT SAND DUNES CARBON PRECIPITATION COMMUNITIES PHOTOSYNTHESIS RESPIRATION
英文关键词	Climate change; Biocrust; Net photosynthesis; Carbon fixation; Desert ecosystem
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000639140200019
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/253799
作者单位	[Li, Xinrong; Hui, Rong; Zhang, Peng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource Res, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China; [Li, Xinrong; Song, Naiping] Ningxia Univ, Breeding Base Key Lab Land Degradat & Ecol Restor, Yinchuan 750021, Ningxia, Peoples R China
推荐引用方式 GB/T 7714	Li, Xinrong,Hui, Rong,Zhang, Peng,et al. Divergent responses of moss- and lichen-dominated biocrusts to warming and increased drought in arid desert regions[J]. 中国科学院西北生态环境资源研究院,2021,303.
APA	Li, Xinrong,Hui, Rong,Zhang, Peng,&Song, Naiping.(2021).Divergent responses of moss- and lichen-dominated biocrusts to warming and increased drought in arid desert regions.AGRICULTURAL AND FOREST METEOROLOGY,303.
MLA	Li, Xinrong,et al."Divergent responses of moss- and lichen-dominated biocrusts to warming and increased drought in arid desert regions".AGRICULTURAL AND FOREST METEOROLOGY 303(2021).