干旱区生态环境知识资源中心(Arid): Biocrust cyanobacterial composition, diversity, and environmental drivers in two contrasting climatic regions in Brazil

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DOI	10.1016/j.geoderma.2020.114914
	Biocrust cyanobacterial composition, diversity, and environmental drivers in two contrasting climatic regions in Brazil
	Machado de Lima, Nathali Maria; Munoz-Rojas, Miriam; Vazquez-Campos, Xabier; Zanini Branco, Luis Henrique
通讯作者	de Lima, NMM (corresponding author), UNSW Sydney, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW 2052, Australia.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	386
英文摘要	Biological soil crusts or biocrusts have critical ecological roles in dryland ecosystems including soil stabilization, erosion control and nutrient cycling. Global environmental changes are expected to impact terrestrial ecosystems, including biocrust communities. Thus, a growing number of studies have focused on investigating the diversity of biocrust-forming organisms including cyanobacteria. Despite the increasing interest in understanding biocrust cyanobacteria, there are still several knowledge gaps, particularly in areas from South America, where studies are limited. Here, we studied the composition, abundance, and environmental drivers of cyanobacterial biocrust from two important biomes in Brazil, i.e. Caatinga and Pampa, which are subject to desertification and anthropogenic pressures, respectively. Ten samples at three sites were explored at each biome (n = 60) and cyanobacterial biocrust community composition and diversity was analyzed through morphological evaluation and Next Generation Sequencing targeting the 16S rRNA gen. Soil and climatic variables, e.g. organic matter, soil texture, nitrogen and phosphorus content, temperature, and solar irradiance, were also determined at each site. Our results showed that biocrust cyanobacteria had distinct taxonomic compositions and assemblages at each biome. Similarly, cyanobacterial composition across sites within each biome differed substantially. Soil temperature and pH were identified as the main factors explaining such biotic structures. Caatinga sites, characterized by more arid environments, presented a higher abundance of N-fixing cyanobacteria, e.g. Scytonema. In contrast, Pampa, with higher rainfall regimes, showed a larger abundance of biocrust-forming bacteria such as Microcoleus and Leptolyngbya. The outcomes of this research are expected to provide a basis to enhance biocrusts and conservation efforts and promote the use of biocrust cyanobacteria as global change indicators.
英文关键词	Biocrust Cyanobacterial diversity 16S rRNA Scytonema Caatinga Pampa
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000613923000010
WOS关键词	BIOLOGICAL SOIL CRUSTS ; COLORADO PLATEAU ; COMMUNITY STRUCTURE ; DESERT ; CAATINGA ; DESERTIFICATION ; PERSPECTIVES ; BIODIVERSITY ; SCYTONEMIN ; SURFACE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350371
作者单位	[Machado de Lima, Nathali Maria; Zanini Branco, Luis Henrique] 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; Munoz-Rojas, Miriam] UNSW Sydney, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW 2052, Australia; [Munoz-Rojas, Miriam] Univ Western Australia, Sch Biol Sci, Crawley, WA 6009, Australia; [Vazquez-Campos, Xabier] Univ New South Wales, Sch Biotechnol & Biomol Sci, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Machado de Lima, Nathali Maria,Munoz-Rojas, Miriam,Vazquez-Campos, Xabier,et al. Biocrust cyanobacterial composition, diversity, and environmental drivers in two contrasting climatic regions in Brazil[J]. University of Western Australia,2021,386.
APA	Machado de Lima, Nathali Maria,Munoz-Rojas, Miriam,Vazquez-Campos, Xabier,&Zanini Branco, Luis Henrique.(2021).Biocrust cyanobacterial composition, diversity, and environmental drivers in two contrasting climatic regions in Brazil.GEODERMA,386.
MLA	Machado de Lima, Nathali Maria,et al."Biocrust cyanobacterial composition, diversity, and environmental drivers in two contrasting climatic regions in Brazil".GEODERMA 386(2021).