干旱区生态环境知识资源中心(Arid): Rainfall pulse regime drives biomass and community composition in biological soil crusts

Arid

DOI	10.1002/ecy.3744
	Rainfall pulse regime drives biomass and community composition in biological soil crusts
	Fernandes, Vanessa M. C.; Rudgers, Jennifer A.; Collins, Scott L.; Garcia-Pichel, Ferran
通讯作者	Fernandes, VMC
来源期刊	ECOLOGY
ISSN	0012-9658
EISSN	1939-9170
出版年	2022
卷号	103 期号:9
英文摘要	Future climates will alter the frequency and size of rain events in drylands, potentially affecting soil microbes that generate carbon feedbacks to climate, but field tests are rare. Topsoils in drylands are commonly colonized by biological soil crusts (biocrusts), photosynthesis-based communities that provide services ranging from soil fertilization to stabilization against erosion. We quantified responses of biocrust microbial communities to 12 years of altered rainfall regimes, with 60 mm of additional rain per year delivered either as small (5 mm) weekly rains or large (20 mm) monthly rains during the summer monsoon season. Rain addition promoted microbial diversity, suppressed the dominant cyanobacterium, Microcoleus vaginatus, and enhanced nitrogen-fixing taxa, but did not consistently increase microbial biomass. The addition of many small rain events increased microbial biomass, whereas few, large events did not. These results alter the physiological paradigm that biocrusts are most limited by the amount of rainfall and instead predict that regimes enriched in small rain events will boost cyanobacterial biocrusts and enhance their beneficial services to drylands.
英文关键词	arid lands biocrusts climate change cyanobacteria rainfall variability soil microbiomes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000831090600001
WOS关键词	NET PRIMARY PRODUCTION ; NORTHERN CHIHUAHUAN DESERT ; PRECIPITATION VARIABILITY ; TERRESTRIAL ECOSYSTEMS ; ALTERED PRECIPITATION ; PRIMARY PRODUCTIVITY ; NITROGEN LIMITATION ; CYANOBACTERIA ; DIVERSITY ; PATTERNS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392374
推荐引用方式 GB/T 7714	Fernandes, Vanessa M. C.,Rudgers, Jennifer A.,Collins, Scott L.,et al. Rainfall pulse regime drives biomass and community composition in biological soil crusts[J],2022,103(9).
APA	Fernandes, Vanessa M. C.,Rudgers, Jennifer A.,Collins, Scott L.,&Garcia-Pichel, Ferran.(2022).Rainfall pulse regime drives biomass and community composition in biological soil crusts.ECOLOGY,103(9).
MLA	Fernandes, Vanessa M. C.,et al."Rainfall pulse regime drives biomass and community composition in biological soil crusts".ECOLOGY 103.9(2022).