Repositorio
Institucional

Cambiazo, Veronica

Microbial Communities in Permafrost, Moraine and Deschampsia antarctica Rhizosphere Soils near Ecology Glacier (King George Island, Maritime Antarctic)

MDPI

DIVERSITY-BASEL

en

While the recession of glaciers in the Antarctic is of global concern under climate change, the impact of deglaciation on soil microbiomes is still limited. Here, soil samples were collected from permafrost (P), moraine (M) and Deschampsia antarctica rhizosphere (R) soils near Ecology Glacier (Antarctic), and their soil physicochemical properties and microbial communities (bacteria, archaea and fungi) were characterized. Our analyses showed that there were significant differences in the soil properties and microbial communities between the R samples and the P and M samples. Specifically, amplicon sequencing of 16S rDNA revealed high bacterial richness and diversity in the studied soils, which were dominated mainly by the phyla Proteobacteria, Actinobacteriota and Bacteroidota. In contrast, lower richness and diversity were observed in the archaeal communities, which were dominated by the phyla Chenarchaeota (M and R) and Thermoplasmadota (M). In addition, fungal community analysis revealed a lower richness and diversity (M and R), dominated by the phylum Ascomycota. Our observations are consistent with previous reports describing the relevant changes in soil microbial communities during glacial recession, including fewer microbial groups studied in soils (archaea and fungi). However, further studies are still needed to elucidate the contributions of microbial communities to soil formation and plant colonization in ice-free soils in Antarctica under global climate change.Si bien el retroceso de los glaciares en la Antártida es una preocupación global bajo el cambio climático, el impacto de la desglaciación en los microbiomas del suelo aún es limitado. En este estudio, se recolectaron muestras de suelo de permafrost (P), morrena (M) y rizosfera de Deschampsia antarctica (R) cerca del Glaciar Ecology (Antártida), y se caracterizaron sus propiedades fisicoquímicas y comunidades microbianas (bacterias, arqueas y hongos). Nuestros análisis mostraron que existían diferencias significativas en las propiedades del suelo y las comunidades microbianas entre las muestras R y las muestras P y M. Específicamente, la secuenciación de amplicones del ADNr 16S reveló una alta riqueza y diversidad bacteriana en los suelos estudiados, dominados principalmente por los filos Proteobacteria, Actinobacteriota y Bacteroidota. Por el contrario, se observó menor riqueza y diversidad en las comunidades de arqueas, dominadas por los filos Chenarchaeota (M y R) y Thermoplasmadota (M). Además, el análisis de la comunidad fúngica reveló una menor riqueza y diversidad (M y R), dominada por el filo Ascomycota. Nuestras observaciones concuerdan con informes previos que describen los cambios relevantes en las comunidades microbianas del suelo durante el retroceso glaciar, incluyendo una menor cantidad de grupos microbianos estudiados en suelos (arqueas y hongos). Sin embargo, aún se necesitan más estudios para dilucidar la contribución de las comunidades microbianas a la formación del suelo y la colonización vegetal en suelos libres de hielo en la Antártida bajo el cambio climático global.

artículo original

amplicon sequencing

permafrost melting

Antarctic soil

plant-microbe interactions

soil microbiota

10.3390/d17020086

pdf

CLIMATE-CHANGE

ORGANIC-ACIDS

DIVERSITY

PHOSPHORUS

SUCCESSION

BACTERIAL

VEGETATION

ARCHAEAL

FUNGI

LIFE

CLIMATE-CHANGE

ORGANIC-ACIDS

DIVERSITY

PHOSPHORUS

SUCCESSION

BACTERIAL

VEGETATION

ARCHAEAL

FUNGI

LIFE

Microbiología

Ciencias del Medio Ambiente

Ecología

versión publicada

dorada

verde

acceso abierto

acceso abierto

WOS:001433220300001

Microbial Communities in Permafrost, Moraine and Deschampsia antarctica Rhizosphere Soils near Ecology Glacier (King George Island, Maritime Antarctic)

artículo original

MDPI

DIVERSITY-BASEL

Biodiversity Conservation

Ecology

en

CC BY 4.0

Chilean National Agency for Research and Development (ANID)#Regular Research Team Projects in Science and Technology and Thematic Research Team from the Chilean National Agency for Research and Development#National Fund for Scientific and Technological Development (FONDECYT)(Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)CONICYT FONDECYT)#Millennium Science Initiative Program

Chilean National Agency for Research and Development (ANID) [ACT210044]

Regular Research Team Projects in Science and Technology and Thematic Research Team from the Chilean National Agency for Research and Development [1221228, 1240602]

National Fund for Scientific and Technological Development (FONDECYT) [ICN2021_044]

Millennium Science Initiative Program

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