干旱区生态环境知识资源中心(Arid): Niche Partitioning with Temperature among Heterocystous Cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from Biological Soil Crusts

Arid

DOI	10.3390/microorganisms8030396
	Niche Partitioning with Temperature among Heterocystous Cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from Biological Soil Crusts
	Giraldo-Silva, Ana 1,2; Fernandes, Vanessa M. C.1,2; Bethany, Julie 1,2; Garcia-Pichel, Ferran 1,2
通讯作者	Garcia-Pichel, Ferran
来源期刊	MICROORGANISMS
EISSN	2076-2607
出版年	2020
卷号	8 期号:3
英文摘要	Heterocystous cyanobacteria of biocrusts are key players for biological fixation in drylands, where nitrogen is only second to water as a limiting resource. We studied the niche partitioning among the three most common biocrust heterocystous cyanobacteria sts using enrichment cultivation and the determination of growth responses to temperature in 30 representative isolates. Isolates of Scytonema spp. were most thermotolerant, typically growing up to 40 degrees C, whereas only those of Tolypothrix spp. grew at 4 degrees C. Nostoc spp. strains responded well at intermediate temperatures. We could trace the heat sensitivity in Nostoc spp. and Tolypothrix spp. to N-2-fixation itself, because the upper temperature for growth increased under nitrogen replete conditions. This may involve an inability to develop heterocysts (specialized N-2-fixing cells) at high temperatures. We then used a meta-analysis of biocrust molecular surveys spanning four continents to test the relevance of this apparent niche partitioning in nature. Indeed, the geographic distribution of the three types was clearly constrained by the mean local temperature, particularly during the growth season. This allows us to predict a potential shift in dominance in many locales as a result of global warming, to the benefit of Scytonema spp. populations.
英文关键词	biological soil crust drylands niche partitioning nitrogen fixing cyanobacteria
类型	Article
语种	英语
国家	USA
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000525952700084
WOS关键词	SMALL RAINFALL EVENTS ; GURBANTUNGGUT DESERT ; ECOLOGICAL ROLE ; PRECIPITATION ; DIVERSITY ; COMMUNITY ; PERFORMANCE ; THROUGHPUT ; BIOCRUSTS ; FIXATION
WOS类目	Microbiology
WOS研究方向	Microbiology
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315176
作者单位	1.Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA; 2.Arizona State Univ, CFAM, Biodesing Inst, Tempe, AZ 85287 USA
推荐引用方式 GB/T 7714	Giraldo-Silva, Ana,Fernandes, Vanessa M. C.,Bethany, Julie,et al. Niche Partitioning with Temperature among Heterocystous Cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from Biological Soil Crusts[J]. Arizona State University,2020,8(3).
APA	Giraldo-Silva, Ana,Fernandes, Vanessa M. C.,Bethany, Julie,&Garcia-Pichel, Ferran.(2020).Niche Partitioning with Temperature among Heterocystous Cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from Biological Soil Crusts.MICROORGANISMS,8(3).
MLA	Giraldo-Silva, Ana,et al."Niche Partitioning with Temperature among Heterocystous Cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from Biological Soil Crusts".MICROORGANISMS 8.3(2020).