Plant species traits regulate methane production in freshwater wetland soils

Sutton‐Grier, Ariana E.; Megonigal, J. Patrick

doi:10.1016/j.soilbio.2010.11.009

Cited by 129 publications

(83 citation statements)

References 47 publications

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“…3b) (Megonigal and Schlesinger 2002). Thus, while the net effect of increased plant growth may often be to increase CH 4 emissions as in the present study, there are instances where the net effect is to decrease CH 4 emissions (Sutton-Grier and Megonigal 2011). This insight is useful to consider when managing wetlands for certain species or genotypes.…”

Section: Discussionmentioning

confidence: 58%

“…The absence of CO 2 -only or N-only effects highlights a limitation on the generalization that CH 4 emissions are proportional to plant productivity because there were CO 2 -only and N-only effects on plant growth (Mozdzer and Megonigal 2012). One reason that CH 4 emissions do not always increase linearly with plant growth is that plants also inhibit CH 4 emissions by regenerating alternative electron accepting compounds in the rhizosphere (Neubauer et al 2005;Sutton-Grier and Megonigal 2011) and by supporting CH 4 oxidizing bacteria (Fig. 3b) (Megonigal and Schlesinger 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Earlier work has shown that differences in plant species (van Hannen et al 1999) or cultivar (Lou et al 2008) can have profound effects on methane (CH 4 ) emissions. Such differences in CH 4 emissions are attributed to differences in plant traits that influence the balance between plant-supported CH 4 production and oxidation (Sutton-Grier and Megonigal 2011) and ecophysiological phenomena that regulate the ventilation of CH 4 through plants to the atmosphere (Sharkey et al 1991;Garnet et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Increased Methane Emissions by an Introduced Phragmites australis Lineage under Global Change

Mozdzer

Megonigal

2013

Wetlands

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North American wetlands have been invaded by an introduced lineage of the common reed, Phragmites australis. Native lineages occur in North America, but many populations have been extirpated by the introduced conspecific lineage. Little is known about how subtle changes in plant lineage may affect methane (CH 4 ) emissions. Native and introduced Phragmites were grown under current and predicted future levels of atmospheric CO 2 and nitrogen(N) pollution in order to understand how CH 4 emissions may vary between conspecific lineages. We found introduced Phragmites emitted more CH 4 than native Phragmites, and that CH 4 emissions increased significantly in both with CO 2 +N treatment. There was no significant difference in CH 4 production potentials, but CH 4 oxidation potentials were higher in soils from the introduced lineage. Intraspecific plant responses to resource availability changed CH 4 emissions, with plant density, root mass, and leaf area being significantly positively correlated with higher emissions. The absence of CO 2 -only or N-only effects highlights a limitation on the generalization that CH 4 emissions are proportional to plant productivity. Our data suggest that intraspecific changes in plant community composition have important implications for greenhouse emissions. Furthermore, global change-enhanced invasion by introduced Phragmites may increase CH 4 emissions unless these factors cause a compensatory increase in carbon sequestration.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Increased Methane Emissions by an Introduced Phragmites australis Lineage under Global Change

Mozdzer

Megonigal

2013

Wetlands

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“…Although above-ground shoot clipping inevitably decreased the substrate availability for methanogenesis, clipping probably enhanced CH 4 transport because the main plant compartment limiting CH 4 emissions may not be in the stem of plants, but located at the root-shoot boundary (Kelker and Chanton 1997;Ding et al 2005). In addition, clipping largely decreased plant photosynthetic activity, leading to less O 2 transporting into the rhizosphere and further decreased CH 4 oxidation (Ding et al 2005;Sutton-Grier and Megonigal 2011). Consequently, positive and negative shoot clipping effects on CH 4 flux were in balance, resulting in similar CH 4 flux rates of shoot clippings and control treatments.…”

Section: Impact Of Shoot Clipping and Root Exclusion On Ch 4 Fluxesmentioning

confidence: 99%

“…In addition, plants can supply microbes with labile substrates and serve as a transport pathway, which may increase N 2 O emissions (Rückauf et al 2004;. Previous studies have reported increases (Bellisario et al 1999;Laanbroek 2010) or decreases (Kao-kniffin et al 2010;Sutton-Grier and Megonigal 2011) of CH 4 emission in response to an increase in plant biomass or productivity. The contribution of plant-mediated CH 4 flux varied substantially among species and wetland types (Whiting and Chanton 1992;Ding et al 2005;Dorodnikov et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods

Cai

Yao

et al. 2015

Plant Soil

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Aims Plants have been suggested to have significant effects on methane (CH 4 ) and nitrous oxide (N 2 O) fluxes from littoral wetlands, but it remains unclear in subtropical lakes. Methods We conducted in situ measurement of CH 4 and N 2 O fluxes for two years. To distinguish between the effects of shoots and roots, three treatments (i.e., intact plants as control, shoot clipping, and root exclusion) were used. Effects of plant biomass, temperature, and soil moisture on CH 4 and N 2 O fluxes were analyzed. Results The mean ecosystem CH 4 emission rate was 36 μg CH 4 m −2 h −1 for drying periods, but 8219 μg CH 4 m −2 h −1 for drying-wetting transition periods. CH 4 fluxes were positively correlated with below-ground and total biomass, but not with above-ground biomass. Clipping did not significantly alter CH 4 flux rate, but root exclusion decreased the CH 4 flux by 116 % as compared to the control. N 2 O emissions were similar for both the drying and drying-wetting transition periods, with a mean rate of 20 μg N 2 O m −2 h −1 . Both clipping and root exclusion significantly increased N 2 O fluxes as compared to the control. Conclusions There was no significant correlation between CH 4 and N 2 O fluxes. Roots dominated plantmediated enhancement in CH 4 fluxes, but played almost an equal role as shoots in plant-regulated suppression on N 2 O fluxes in this Carex meadow during drawdown periods.

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Characteristics and metabolic patterns of soil methanogenic archaea communities in the high‐latitude natural forested wetlands of China

Zhao

Bai

et al. 2021

Ecology and Evolution

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Plant species traits regulate methane production in freshwater wetland soils

Cited by 129 publications

References 47 publications

Increased Methane Emissions by an Introduced Phragmites australis Lineage under Global Change

Increased Methane Emissions by an Introduced Phragmites australis Lineage under Global Change

Plant-mediated methane and nitrous oxide fluxes from a carex meadow in Poyang Lake during drawdown periods

Characteristics and metabolic patterns of soil methanogenic archaea communities in the high‐latitude natural forested wetlands of China

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