The Compositionally Distinct Cyanobacterial Biocrusts From Brazilian Savanna and Their Environmental Drivers of Community Diversity

Autor(es)

Machado-de-Lima, Nathali Maria ^[1] ; Camara Fernandes, Vanessa Moreira ^[2] ; Roush, Daniel ^[2] ; Ayuso, Sergio Velasco ^[3] ; Rigonato, Janaina ^[4] ; Garcia-Pichel, Ferran ^[2] ; Zanini Branco, Luis Henrique ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Zool & Bot, Microbiol Grad Program, Sao Paulo, SP - Brazil

^[2] Arizona State Univ, Ctr Fundamental & Appl Microbi, Biodesign Inst, Tempe, AZ 85281 - USA

^[3] Univ Buenos Aires, Fac Agron, Inst Invest Fisiol & Ecol Vinculadas Agr, IFEVA, CONICET, Buenos Aires, DF - Argentina

^[4] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN MICROBIOLOGY; v. 10, DEC 17 2019.
• Citações Web of Science: 0

Resumo

The last decade was marked by efforts to define and identify the main cyanobacterial players in biological crusts around the world. However, not much is known about biocrusts in Brazil's tropical savanna (cerrado), despite the existence of environments favorable to their development and ecological relevance. We examined the community composition of cyanobacteria in biocrusts from six sites distributed in the Southeast of the country using high throughput sequencing of 16S rRNA and phylogenetic placement in the wider context of biocrusts from deserts. Sequences ascribable to 22 genera of cyanobacteria were identified. Although a significant proportion of sequences did not match those of known cyanobacteria, several clades of Leptolyngbya and Porphyrosiphon were found to be the most abundant. We identified significant differences in dominance and overall composition among the cerrado sites, much larger than within-site variability. The composition of cerrado cyanobacterial communities was distinct from those known in biocrusts from North American deserts. Among several environmental drivers considered, the opposing trend of annual precipitation and mean annual temperature best explained the variability in community composition within Brazilian biocrusts. Their compositional uniqueness speaks of the need for dedicated efforts to study the ecophysiology of tropical savanna biocrust and their roles in ecosystem function for management and preservation. (AU)

• Processo FAPESP: 15/17709-8 - Diversidade e ecologia de cianobactérias de crostas biológicas de cerrado brasileiro
• Beneficiário: Náthali Maria Machado de Lima
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 14/06245-8 - Diversidade de cianobactérias em crostas biológicas e avaliação de atividade celulolítica e hemicelulolítica
• Beneficiário: Náthali Maria Machado de Lima
• Linha de fomento: Bolsas no Brasil - Mestrado