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Elevated ground-level O3 negatively influences paddy methanogenic archaeal community.

Feng Y, Lin X, Yu Y, Zhang H, Chu H, Zhu J - Sci Rep (2013)

Bottom Line: The current knowledge regarding the effect of global climate change on rice-paddy methane (CH4) emissions is incomplete, partly because information is limited concerning the mechanism of the microbial response to elevated ground-level ozone (O3).We found that elevated ground-level O3 inhibited methanogenic activity and influenced the composition of paddy methanogenic communities, reducing the abundance and diversity of paddy methanogens by adversely affecting dominant groups, such as aceticlastic Methanosaeta, especially at the rice tillering stage.Our results indicated that continuously elevated ground-level O3 would negatively influence paddy methanogenic archaeal communities and its critical ecological function.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences Nanjing, 210008, Jiangsu Province P.R. China.

ABSTRACT
The current knowledge regarding the effect of global climate change on rice-paddy methane (CH4) emissions is incomplete, partly because information is limited concerning the mechanism of the microbial response to elevated ground-level ozone (O3). A field experiment was conducted in the China Ozone Free-Air Concentration Enrichment facility in a rice-wheat rotation system to investigate the responses of methanogenic archaeal communities to elevated ground-level O3 by culture-independent and -reliant approaches. We found that elevated ground-level O3 inhibited methanogenic activity and influenced the composition of paddy methanogenic communities, reducing the abundance and diversity of paddy methanogens by adversely affecting dominant groups, such as aceticlastic Methanosaeta, especially at the rice tillering stage. Our results indicated that continuously elevated ground-level O3 would negatively influence paddy methanogenic archaeal communities and its critical ecological function. These findings will contribute to a comprehensive understanding of the responses and feedbacks of paddy ecosystems to global climate change.

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Methanogenic archaeal community compositional structure in soils as indicated by a non-metric multi-dimensional scaling plot of the weighted pairwise UniFrac community distances between different soil samples.
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f3: Methanogenic archaeal community compositional structure in soils as indicated by a non-metric multi-dimensional scaling plot of the weighted pairwise UniFrac community distances between different soil samples.

Mentions: Variations in the paddy methanogenic archaeal community of different samples were statistically evaluated using a non-metric multidimensional scaling (NMDS) plot of the weighted pairwise UniFrac community distances (Fig. 3). Significant shifts in the assemblage of these functional guilds were observed between elevated ground-level O3 and ambient O3, as well as between the two rice growth stages (p < 0.05), and were confirmed by the ANOSIM results (Table S2). The distances between different samples along the NMDS axis 1 further imply that elevated ground-level O3 concentration has an even greater influence than the rice growth stage. Furthermore, compared to ambient O3 conditions, it could be inferred that elevated ground-level O3 had the opposite influences on methanogenic archaeal community composition at the rice tillering and anthesis stages.


Elevated ground-level O3 negatively influences paddy methanogenic archaeal community.

Feng Y, Lin X, Yu Y, Zhang H, Chu H, Zhu J - Sci Rep (2013)

Methanogenic archaeal community compositional structure in soils as indicated by a non-metric multi-dimensional scaling plot of the weighted pairwise UniFrac community distances between different soil samples.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3824163&req=5

f3: Methanogenic archaeal community compositional structure in soils as indicated by a non-metric multi-dimensional scaling plot of the weighted pairwise UniFrac community distances between different soil samples.
Mentions: Variations in the paddy methanogenic archaeal community of different samples were statistically evaluated using a non-metric multidimensional scaling (NMDS) plot of the weighted pairwise UniFrac community distances (Fig. 3). Significant shifts in the assemblage of these functional guilds were observed between elevated ground-level O3 and ambient O3, as well as between the two rice growth stages (p < 0.05), and were confirmed by the ANOSIM results (Table S2). The distances between different samples along the NMDS axis 1 further imply that elevated ground-level O3 concentration has an even greater influence than the rice growth stage. Furthermore, compared to ambient O3 conditions, it could be inferred that elevated ground-level O3 had the opposite influences on methanogenic archaeal community composition at the rice tillering and anthesis stages.

Bottom Line: The current knowledge regarding the effect of global climate change on rice-paddy methane (CH4) emissions is incomplete, partly because information is limited concerning the mechanism of the microbial response to elevated ground-level ozone (O3).We found that elevated ground-level O3 inhibited methanogenic activity and influenced the composition of paddy methanogenic communities, reducing the abundance and diversity of paddy methanogens by adversely affecting dominant groups, such as aceticlastic Methanosaeta, especially at the rice tillering stage.Our results indicated that continuously elevated ground-level O3 would negatively influence paddy methanogenic archaeal communities and its critical ecological function.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences Nanjing, 210008, Jiangsu Province P.R. China.

ABSTRACT
The current knowledge regarding the effect of global climate change on rice-paddy methane (CH4) emissions is incomplete, partly because information is limited concerning the mechanism of the microbial response to elevated ground-level ozone (O3). A field experiment was conducted in the China Ozone Free-Air Concentration Enrichment facility in a rice-wheat rotation system to investigate the responses of methanogenic archaeal communities to elevated ground-level O3 by culture-independent and -reliant approaches. We found that elevated ground-level O3 inhibited methanogenic activity and influenced the composition of paddy methanogenic communities, reducing the abundance and diversity of paddy methanogens by adversely affecting dominant groups, such as aceticlastic Methanosaeta, especially at the rice tillering stage. Our results indicated that continuously elevated ground-level O3 would negatively influence paddy methanogenic archaeal communities and its critical ecological function. These findings will contribute to a comprehensive understanding of the responses and feedbacks of paddy ecosystems to global climate change.

Show MeSH