Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Proceedings of the National Academy of Sciences, Год журнала: 2015, Номер 112(11)

Опубликована: Фев. 23, 2015

Hadal oceans at water depths below 6,000 m are the least-explored aquatic biosphere. The Challenger Deep, located in western equatorial Pacific, with a depth of ∼11 km, is deepest ocean on Earth. Microbial communities associated waters from sea surface to trench bottom (0∼10,257 m) Deep were analyzed, and unprecedented microbial identified hadal (6,000∼10,257 that distinct abyssal communities. potentially chemolithotrophic populations less abundant than those upper waters. emerging members nitrifiers likely adapt higher flux electron donors also different lower donors. Species-level niche separation most dominant taxa was found between Considering geomorphology isolated hydrotopographical nature Mariana Trench, we hypothesized ecosystem driven by endogenous recycling organic matter geomorphology.

Язык: Английский

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The role of microorganisms at different stages of ecosystem development for soil formation

Biogeosciences, Год журнала: 2013, Номер 10(6), С. 3983 - 3996

Опубликована: Июнь 18, 2013

Abstract. Soil formation is the result of a complex network biological as well chemical and physical processes. The role soil microbes high interest, since they are responsible for most transformations drive development stable labile pools carbon (C), nitrogen (N) other nutrients, which facilitate subsequent establishment plant communities. Forefields receding glaciers provide unique chronosequences different stages ideal ecosystems to study interaction bacteria, fungi archaea with their abiotic environment. In this review we give insights into development. results presented based on studies performed within Collaborative Research Program DFG SFB/TRR 38 (http://www.tu-cottbus.de/ecosystem ) supplemented by data from studies. focusses microbiology major steps formation. Special attention given nutrient cycles crusts (BSCs) plant–microbe interactions.

Язык: Английский

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Isolation of ‘CandidatusNitrosocosmicus franklandus’, a novel ureolytic soil archaeal ammonia oxidiser with tolerance to high ammonia concentration

FEMS Microbiology Ecology, Год журнала: 2016, Номер 92(5), С. fiw057 - fiw057

Опубликована: Март 13, 2016

Studies of the distribution ammonia oxidising archaea (AOA) and bacteria (AOB) suggest distinct ecological niches characterised by concentration pH, arising through differences in substrate affinity tolerance. AOA form five phylogenetic clades, one which, ‘Nitrososphaera sister cluster’, has no cultivated isolate. A representative this cluster, named ‘Candidatus Nitrosocosmicus franklandus’, was isolated from a pH 7.5 arable soil we propose new cluster name: ‘Nitrosocosmicus’. While analysis amoA genes indicates its association with Nitrososphaera 16S rRNA provided support for relative branching that is consistent ‘sister indicating placement within lineage order Nitrososphaerales. ‘Ca. N. franklandus’ capable ureolytic growth tolerances to nitrite are higher than other similar those typical AOB. Similarity characteristics AOB isolates reduces niche differentiation between suggests have wider physiological diversity previously suspected. In particular, high tolerance potential contributions nitrification fertilised soils.

Язык: Английский

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Ammonia oxidation: Ecology, physiology, biochemistry and why they must all come together

FEMS Microbiology Letters, Год журнала: 2018, Номер 365(9)

Опубликована: Март 9, 2018

Ammonia oxidation is a fundamental core process in the global biogeochemical nitrogen cycle. Oxidation of ammonia (NH3) to nitrite (NO2 -) first and rate-limiting step nitrification carried out by distinct groups microorganisms. essential for nutrient turnover most terrestrial, aquatic engineered ecosystems plays major role, both directly indirectly, greenhouse gas production environmental damage. Although has been studied over century, this research field galvanised past decade surprising discoveries novel oxidising This review reflects on date discusses gaps remaining our knowledge biology oxidation.

Язык: Английский

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Meta-analysis reveals ammonia-oxidizing bacteria respond more strongly to nitrogen addition than ammonia-oxidizing archaea

Soil Biology and Biochemistry, Год журнала: 2016, Номер 99, С. 158 - 166

Опубликована: Май 24, 2016

Язык: Английский

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