Organic amendments improve soil conditions and denitrification in a restored riparian wetland

Sutton‐Grier, Ariana E.; Ho, Mengchi; Richardson, Curtis J.

doi:10.1672/08-70.1

Cited by 53 publications

(34 citation statements)

References 30 publications

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“…Many studies have advocated for the amendment of created wetlands with OM in the form of salvaged topsoil or compost to help them achieve reference functionality (Stauffer and Brooks 1997;Whittecar and Daniels 1999;Bruland and Richardson 2004). Indeed, studies have found that moderate loading of compost OM into a created wetland increase woody plant development (Bailey et al 2007) and soil functions, such as microbial decomposition and increased denitrification enzyme activity (Bruland and Richardson 2009;Sutton-Grier et al 2009). …”

Section: Introductionmentioning

confidence: 99%

The Effects of Organic Matter Amendments on Greenhouse Gas Emissions from a Mitigation Wetland in Virginia’s Coastal Plain

Winton

Richardson

2015

Wetlands

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There is concern that widespread restoration and/or creation of freshwater wetlands may present a radiative forcing hazard because of the potential for methane (CH 4 ) emissions. Yet data on greenhouse gas (GHG) emissions from restored wetlands are sparse and there has been little investigation into the GHG effects of amending wetland soils with organic matter (OM), a practice used to improve function of mitigation wetlands in the Eastern United States. In this study we measure GHG emissions across an OM gradient at the Charles City Wetland (CCW) in Charles City County, Virginia. We found soils heavily loaded with OM emit significantly more CO 2 than those that have received little or no OM. CH 4 emissions from CCW are low compared to reference wetlands and show no relationship with the loading rate of added OM or total soil carbon. We conclude that adding moderate amounts (<~150 kg m −2 ) of OM to the CCW does not greatly increase GHG emissions, while the addition of high amounts of OM produces additional CO 2 , but not CH 4 . CH 4 flux is highest under flooded conditions during warmer months but it still a modest contribution to global warming potential compared to soil CO 2 flux.

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Section: Introductionmentioning

confidence: 99%

The Effects of Organic Matter Amendments on Greenhouse Gas Emissions from a Mitigation Wetland in Virginia’s Coastal Plain

Winton

Richardson

2015

Wetlands

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“…The soils in this experiment differed by over 3-fold in soil organic matter content (Table 1), and organic matter content of soils is a strong regulator of microbial activity and biomass (Groffman et al, 1996;Sutton-Grier et al, 2009). In comparison to the freshwater marsh, the brackish marsh soils contained more soil organic matter, higher microbial biomass, and supported higher rates of mineralization on a per gram basis ( Fig.…”

Section: Role Of Electron Donors: Carbon Quantity and Qualitymentioning

confidence: 88%

“…Another possibility is that reduced respiration was caused by the 1-unit decrease in pH in Fe(III)-amended slurries (data not shown; Keller et al (2009)). A third possibility is that Fe(III) directly inhibited methanogenesis through a mechanism that does not shunt electrons to a CO 2 -yielding respiration process, as shown to occur in pure methanogenic cultures (van Bodegom et al, 2004). Our data are consistent with this mechanism because the decrease in total respiration was caused by a decrease in CH 4 respiration and not CO 2 respiration (data not shown).…”

Section: Role Of Electron Acceptorsmentioning

confidence: 96%

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Sutton‐Grier

Keller

Koch

et al. 2011

Soil Biology and Biochemistry

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“…Soil N availability and N inputs have strong positive effects on potential denitrification (Ettema et al 1999;Groffman 1994;Lowrance and Hubbard 2001). Soil C controls variation in denitrification at some sites, as C supply is the ultimate regulator of microbial activity and population size, including denitrifiers (Drury et al 1991;Groffman 1994;Groffman and Crawford 2003;Sutton-Grier et al 2009). These results suggest that the availability of both soil N and soil C may limit denitrification at this site.…”

Section: Discussionmentioning

confidence: 99%

Different plant traits affect two pathways of riparian nitrogen removal in a restored freshwater wetland

2012

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Background & aims Plants may have dissimilar effects on ecosystem processes because they possess different attributes. Given increasing biodiversity losses, it is important to understand which plant traits are key drivers of ecosystem functions. To address this question, we studied the response of two ecosystem functions that remove nitrogen (N) from wetland soils, the accumulation of N in plant biomass and denitrification potential (DNP), to variation in plant trait composition. Methods Our experiment manipulated plant composition in a riparian wetland. We determined relative importance of plant traits and environmental variables as predictors of each ecosystem function. Results We demonstrate that Water Use Efficiency (WUE) had a strong negative effect on biomass N. Root porosity and belowground biomass were negatively correlated with DNP. Trait ordination indicated that WUE was largely orthogonal to traits that maximized DNP. Conclusions These results indicate that plant species with different trait values are required to maintain multiple ecosystem functions, and provide a more mechanistic, trait-based link between the recent findings that higher biodiversity is necessary for multi-functionality. While we selected plant traits based on ecological theory, several of the plant traits were not good predictors of each ecosystem function suggesting the ecological theory linking traits to function is incomplete and requires strengthening. Keywords

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Organic amendments improve soil conditions and denitrification in a restored riparian wetland

Cited by 53 publications

References 30 publications

The Effects of Organic Matter Amendments on Greenhouse Gas Emissions from a Mitigation Wetland in Virginia’s Coastal Plain

The Effects of Organic Matter Amendments on Greenhouse Gas Emissions from a Mitigation Wetland in Virginia’s Coastal Plain

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Different plant traits affect two pathways of riparian nitrogen removal in a restored freshwater wetland

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