Drying effects on archaeal community composition and methanogenesis in bromeliad tanks

FEMS Microbiology Ecology
Franziska B BrandtR Conrad

Abstract

Tank bromeliads are highly abundant epiphytes in neotropical forests and form a unique canopy wetland ecosystem which is involved in the global methane cycle. Although the tropical climate is characterized by high annual precipitation, the plants can face periods of restricted water. Thus, we hypothesized that water is an important controller of the archaeal community composition and the pathway of methane formation in tank bromeliads. Greenhouse experiments were established to investigate the resident and active archaeal community targeting the 16S rDNA and 16S rRNA in the tank slurry of bromeliads at three different moisture levels. Archaeal community composition and abundance were determined using terminal restriction fragment length polymorphism and quantitative PCR. Release of methane and its stable carbon isotopic signature were determined in a further incubation experiment under two moisture levels. The relative abundance of aceticlastic Methanosaetaceae increased up to 34% and that of hydrogenotrophic Methanobacteriales decreased by more than half with decreasing moisture. Furthermore, at low moisture levels, methane production was up to 100-fold lower (≤0.1-1.1 nmol gdw(-1) d(-1)) than under high moisture levels (10-15...Continue Reading

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Citations

Jan 23, 2016·Frontiers in Microbiology·Björn BreidenbachMarc G Dumont
May 2, 2018·Ecology·Aliny P F PiresVinicius F Farjalla
May 11, 2017·Environmental Microbiology·Stilianos LoucaVinicius F Farjalla
Nov 11, 2017·Environmental Microbiology Reports·Guntars O MartinsonRalf Conrad
Jun 21, 2020·The Journal of Eukaryotic Microbiology·Taiz L L SimãoEduardo Eizirik
Jan 28, 2021·European Journal of Protistology·Sabine AgathaAlan Warren

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