Soil bacterial diversity is positively associated with air temperature in the maritime Antarctic

Scientific Reports
Paul G DennisDavid W Hopkins

Abstract

Terrestrial ecosystems in the maritime Antarctic experienced rapid warming during the latter half of the 20th century. While warming ceased at the turn of the millennium, significant increases in air temperature are expected later this century, with predicted positive effects on soil fungal diversity, plant growth and ecosystem productivity. Here, by sequencing 16S ribosomal RNA genes in 40 soils sampled from along a 1,650 km climatic gradient through the maritime Antarctic, we determine whether rising air temperatures might similarly influence the diversity of soil bacteria. Of 22 environmental factors, mean annual surface air temperature was the strongest and most consistent predictor of soil bacterial diversity. Significant, but weaker, associations between bacterial diversity and soil moisture content, C:N ratio, and Ca, Mg, PO43- and dissolved organic C concentrations were also detected. These findings indicate that further rises in air temperature in the maritime Antarctic may enhance terrestrial ecosystem productivity through positive effects on soil bacterial diversity.

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Citations

Sep 25, 2020·Microorganisms·Max OrtizDon Cowan
Mar 7, 2021·International Journal of Environmental Research and Public Health·Yinhong HuXiaoke Wang
Feb 12, 2020·The Science of the Total Environment·Romie Tignat-PerrierCatherine Larose
Dec 3, 2021·The Science of the Total Environment·Andrés E MarcoletaRosalba Lagos

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Datasets Mentioned

BETA
EF219488

Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

MUSCLE
BLAST
UCHIME
Arb
MEGA6
PERMANOVA
Vegan R package
MASAT
QIIME script
UCLUST

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