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Distinct methanotrophic communities exist in habitats with different soil water contents

Distinct methanotrophic communities exist in habitats with different soil water contents
Distinct methanotrophic communities exist in habitats with different soil water contents

Aerobic methane oxidizing bacteria play a key role in controlling global climate by reducing methane (CH 4 ) emissions in natural ecosystems. We studied the community assembly processes and co-occurrence interactions of soil methanotrophs in three habitats (an alpine meadow, a marsh meadow, and a marsh) from Qinghai-Tibetan Plateau. Methanotrophic communities and CH 4 oxidation potentials varied considerably between the habitats, and the diversity of methanotrophs was significantly lower in marsh meadow than in the other two soils (P < 0.001). Methanotrophic bacterial diversity was significantly correlated with soil dissolved organic carbon (DOC), pH, total carbon (TC), and total nitrogen (TN), while methanotrophic community structure was mostly correlated with soil C/N, TC, soil moisture, and TN. Stochasticity dominated methanotrophic community assembly, and increased from 67.6% in the alpine meadow and 68.0% in the marsh meadow to 98.2% in the marsh. The natural connectivity of co-occurrence network was greater in the alpine meadow than in the other two habitats, suggesting a more stable network in the alpine meadow. Methanotroph diversity contributed to the sub-network topological differences and keystone species were identified such as USCγ, Methylobacter, and RPC-1. The results suggest the existence of distinct community assembly processes and co-occurrence patterns of soil methanotrophs among different habitats, which may ultimately enhance the understanding of factors influencing CH 4 oxidation rates.

Co-occurrence, Deterministic, Methane, Methanotrophs, Phylogenetic diversity, Stochastic
0038-0717
143-152
Zhang, Liyan
507829ab-fa08-4b28-9767-44a19364e4f5
Adams, Jonathan M.
4b6ebb9c-c9bb-44db-89e5-a0adc453133a
Dumont, Marc G.
afd9f08f-bdbb-4cee-b792-1a7f000ee511
Li, Yuntao
77e62d94-0b2b-4fff-a32b-a4e70d93652f
Shi, Yu
ebc43799-f256-47bf-b1c9-cbcc03c47ff7
He, Dan
34533cc2-ce86-4154-9f92-dab79b9c4404
He, Jin Sheng
1bbc7835-0906-4f45-ae9e-95c318bae1fa
Chu, Haiyan
d4f0f658-2b5e-4387-9604-11842a37bcce
Zhang, Liyan
507829ab-fa08-4b28-9767-44a19364e4f5
Adams, Jonathan M.
4b6ebb9c-c9bb-44db-89e5-a0adc453133a
Dumont, Marc G.
afd9f08f-bdbb-4cee-b792-1a7f000ee511
Li, Yuntao
77e62d94-0b2b-4fff-a32b-a4e70d93652f
Shi, Yu
ebc43799-f256-47bf-b1c9-cbcc03c47ff7
He, Dan
34533cc2-ce86-4154-9f92-dab79b9c4404
He, Jin Sheng
1bbc7835-0906-4f45-ae9e-95c318bae1fa
Chu, Haiyan
d4f0f658-2b5e-4387-9604-11842a37bcce

Zhang, Liyan, Adams, Jonathan M., Dumont, Marc G., Li, Yuntao, Shi, Yu, He, Dan, He, Jin Sheng and Chu, Haiyan (2019) Distinct methanotrophic communities exist in habitats with different soil water contents. Soil Biology and Biochemistry, 132, 143-152. (doi:10.1016/j.soilbio.2019.02.007).

Record type: Article

Abstract

Aerobic methane oxidizing bacteria play a key role in controlling global climate by reducing methane (CH 4 ) emissions in natural ecosystems. We studied the community assembly processes and co-occurrence interactions of soil methanotrophs in three habitats (an alpine meadow, a marsh meadow, and a marsh) from Qinghai-Tibetan Plateau. Methanotrophic communities and CH 4 oxidation potentials varied considerably between the habitats, and the diversity of methanotrophs was significantly lower in marsh meadow than in the other two soils (P < 0.001). Methanotrophic bacterial diversity was significantly correlated with soil dissolved organic carbon (DOC), pH, total carbon (TC), and total nitrogen (TN), while methanotrophic community structure was mostly correlated with soil C/N, TC, soil moisture, and TN. Stochasticity dominated methanotrophic community assembly, and increased from 67.6% in the alpine meadow and 68.0% in the marsh meadow to 98.2% in the marsh. The natural connectivity of co-occurrence network was greater in the alpine meadow than in the other two habitats, suggesting a more stable network in the alpine meadow. Methanotroph diversity contributed to the sub-network topological differences and keystone species were identified such as USCγ, Methylobacter, and RPC-1. The results suggest the existence of distinct community assembly processes and co-occurrence patterns of soil methanotrophs among different habitats, which may ultimately enhance the understanding of factors influencing CH 4 oxidation rates.

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Zhang_et_al._Manuscript_accepted - Accepted Manuscript
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More information

Accepted/In Press date: 13 February 2019
e-pub ahead of print date: 18 February 2019
Published date: 1 May 2019
Keywords: Co-occurrence, Deterministic, Methane, Methanotrophs, Phylogenetic diversity, Stochastic

Identifiers

Local EPrints ID: 429476
URI: http://eprints.soton.ac.uk/id/eprint/429476
ISSN: 0038-0717
PURE UUID: f7db8fe5-d6cb-4006-be90-14f7cc0f0242
ORCID for Marc G. Dumont: ORCID iD orcid.org/0000-0002-7347-8668

Catalogue record

Date deposited: 27 Mar 2019 17:30
Last modified: 07 Oct 2020 06:41

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