The microbiome of the ice-capped Cayambe Volcanic Complex in Ecuador

Frontiers in Microbiology

Microbiology

Félix J. Sangari¹  Magdalena Díaz²  Cristian Quiroz-Moreno³  Pablo Jarrín-V⁴  Spiros N. Agathos⁵  Pablo Castillejo⁶  Vicente Arnau⁷  Pablo Monfort-Lanzas⁷  Wladimiro Díaz⁷  Erika Rivadeneira⁸  C. Alfonso Molina⁹ 

[1] Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain;Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC), CSIC – Universidad de Cantabria, Santander, Spain;Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain;Instituto de Investigación en Zoonosis (CIZ), Universidad Central del Ecuador, Quito, Ecuador;Facultad de Ingeniería Química, Universidad Central del Ecuador, Quito, Ecuador;Institute of Integrative Systems Biology (ISysBio), University of Valencia and Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain;Department of Horticulture and Crop Science, Ohio State University, Columbus, OH, United States;Dirección de Innovación, Instituto Nacional de Biodiversidad INABIO, Quito, Ecuador;Earth and Life Institute (ELI), Université Catholique de Louvain, Louvain-la-Neuve, Belgium;Grupo de Investigación en Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de las Américas, Quito, Ecuador;Facultad de Ingeniería y Ciencias Aplicadas, Universidad Internacional SEK, Quito, Ecuador;Institute of Integrative Systems Biology (ISysBio), University of Valencia and Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain;Instituto de Investigación en Zoonosis (CIZ), Universidad Central del Ecuador, Quito, Ecuador;Instituto de Investigación en Zoonosis (CIZ), Universidad Central del Ecuador, Quito, Ecuador;Facultad de Medicina Veterinaria y Zootecnia, Universidad Central del Ecuador, Quito, Ecuador;

关键词: volcano;    bacterial community;    Andean glacier;    elevational gradient;    diversity;   

DOI  :  10.3389/fmicb.2023.1154815

 received in 2023-01-31, accepted in 2023-04-17,  发布年份 2023

来源: Frontiers

【 摘 要 】

A major challenge in microbial ecology is to understand the principles and processes by which microbes associate and interact in community assemblages. Microbial communities in mountain glaciers are unique as first colonizers and nutrient enrichment drivers for downstream ecosystems. However, mountain glaciers have been distinctively sensitive to climate perturbations and have suffered a severe retreat over the past 40  years, compelling us to understand glacier ecosystems before their disappearance. This is the first study in an Andean glacier in Ecuador offering insights into the relationship of physicochemical variables and altitude on the diversity and structure of bacterial communities. Our study covered extreme Andean altitudes at the Cayambe Volcanic Complex, from 4,783 to 5,583 masl. Glacier soil and ice samples were used as the source for 16S rRNA gene amplicon libraries. We found (1) effects of altitude on diversity and community structure, (2) the presence of few significantly correlated nutrients to community structure, (3) sharp differences between glacier soil and glacier ice in diversity and community structure, where, as quantified by the Shannon γ-diversity distribution, the meta-community in glacier soil showed more diversity than in glacier ice; this pattern was related to the higher variability of the physicochemical distribution of variables in the former substrate, and (4) significantly abundant genera associated with either high or low altitudes that could serve as biomarkers for studies on climate change. Our results provide the first assessment of these unexplored communities, before their potential disappearance due to glacier retreat and climate change.

【 授权许可】

Unknown   
Copyright © 2023 Díaz, Monfort-Lanzas, Quiroz-Moreno, Rivadeneira, Castillejo, Arnau, Díaz, Agathos, Sangari, Jarrín-V and Molina.