干旱区生态环境知识资源中心(Arid): Biological soil crusts: new genera and species of Cyanobacteria from Brazilian semi-arid regions

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DOI	10.11646/phytotaxa.470.4.1
	Biological soil crusts: new genera and species of Cyanobacteria from Brazilian semi-arid regions
	Machado De Lima, Nathali Maria; Branco, Luis H. Z.
通讯作者	De Lima, NMM
来源期刊	PHYTOTAXA
ISSN	1179-3155
EISSN	1179-3163
出版年	2020
卷号	470 期号:4 页码:263-281
英文摘要	In the uppermost millimeters of soils is commonly found a thin layer of cryptobiotic organisms, including cyanobacteria, microalgae, lichens, mosses, fungi, bacteria and archaea. These communities are called Biological Soil Crusts (BSCs) or biocrusts and perform important ecological functions, mainly attributed to their capacity of providing soil stability and incorporate nutrients through nitrogen and carbon fixation. Among all the organisms found in the biocrusts, the filamentous cyanobacteria Microcoleus vaginatus and M. steenstrupii are the best studied soil colonizers. The genus Microcoleus is considered complex and has been showing close relation with some species of Phormidium. The poor understanding about these two genera is a limit to the description of the real composition of biocrusts and can generate underestimations in the diversity community and the use of wrong organisms in applied projects (e.g. environmental restoration). This work studied eight cyanobacterial populations from Brazilian BSCs sampled in the Caatinga biome. The populations presented Microcoleus-like and Phormidium-like morphologies, but the phylogenetic analyses based on 16S rRNA gene sequences showed that they represent three new genera and six new species of filamentous cyanobacteria associated to the cryptic genera, they are Pycnacronema caatingensis sp. nov., Pycnacronema edaphica sp. nov., Gracilinea arenicola gen. et sp. nov., Marmoreocelis xerophila gen. et sp. nov., Konicacronema caatinguensis gen. et sp. nov. and Trichocoleus caatingensis sp. nov. The generic name and specific epithets of the new taxa are proposed according to the provisions of the International Code of Nomenclature of algae, fungi, and plants.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000587746100001
WOS关键词	GEN. NOV CYANOBACTERIA ; RIBOSOMAL-RNA GENE ; DIVERSITY ; OSCILLATORIALES ; PHORMIDIUM ; REVISION ; BIODIVERSITY ; CYANOPHYCEAE ; SEQUENCES ; BIOCRUSTS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327415
作者单位	[Machado De Lima, Nathali Maria; Branco, Luis H. Z.] Sao Paulo State Univ, IBILCE UNESP, Zool & Bot Dept, Rua Cristovao Colombo 2265, BR-15051000 Sao Jose Do Rio Preto, SP, Brazil; [Machado De Lima, Nathali Maria] Univ Estadual Paulista, Microbiol Grad Program IBILCE, Sao Paulo, SP, Brazil
推荐引用方式 GB/T 7714	Machado De Lima, Nathali Maria,Branco, Luis H. Z.. Biological soil crusts: new genera and species of Cyanobacteria from Brazilian semi-arid regions[J],2020,470(4):263-281.
APA	Machado De Lima, Nathali Maria,&Branco, Luis H. Z..(2020).Biological soil crusts: new genera and species of Cyanobacteria from Brazilian semi-arid regions.PHYTOTAXA,470(4),263-281.
MLA	Machado De Lima, Nathali Maria,et al."Biological soil crusts: new genera and species of Cyanobacteria from Brazilian semi-arid regions".PHYTOTAXA 470.4(2020):263-281.