Restoration effects on water table depths and CO2 fluxes from climatically marginal blanket bog

Dixon, Simon; Qassim, Suzane; Rowson, James; Worrall, Fred; Evans, Martin; Boothroyd, Ian; Bonn, Aletta

doi:10.1007/s10533-013-9915-4

Cited by 31 publications

(29 citation statements)

References 61 publications

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“…This finding is complementary to the finding of Dixon et al (2014) who showed, on the same sites, that decreasing water table depth would increase the rate of net primary production.…”

Section: _1supporting

confidence: 62%

A 5-year study of the impact of peatland revegetation upon DOC concentrations

Qassim

Dixon

Rowson

et al. 2014

Journal of Hydrology

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“…This finding is complementary to the finding of Dixon et al (2014) who showed, on the same sites, that decreasing water table depth would increase the rate of net primary production.…”

Section: _1supporting

confidence: 62%

A 5-year study of the impact of peatland revegetation upon DOC concentrations

Qassim

Dixon

Rowson

et al. 2014

Journal of Hydrology

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“…Water depth has been shown to be more significant than temperature in determining the variation in CO 2 fluxes during inundation (Dixon et al, 2014). Multiple regression analysis of CO 2 fluxes with water depth and soil temperature combined showed a significant paraboloid relationship (R 2 = 0.62, P < 0.001) (Fig.…”

Section: Relationship Between Water Depth and Co 2 And N 2 O Fluxesmentioning

confidence: 93%

Flooding-related increases in CO<sub>2</sub> and N<sub>2</sub>O emissions from a temperate coastal grassland ecosystem

Gebremichael

Orr

2017

Biogeosciences

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Abstract. Given their increasing trend in Europe, an understanding of the role that flooding events play in carbon (C) and nitrogen (N) cycling and greenhouse gas (GHG) emissions will be important for improved assessments of local and regional GHG budgets. This study presents the results of an analysis of the CO 2 and N 2 O fluxes from a coastal grassland ecosystem affected by episodic flooding that was of either a relatively short (SFS) or long (LFS) duration. Compared to the SFS, the annual CO 2 and N 2 O emissions were 1.4 and 1.3 times higher at the LFS, respectively. Mean CO 2 emissions during the period of standing water were 144 ± 18.18 and 111 ± 9.51 mg CO 2 -C m −2 h −1 , respectively, for the LFS and SFS sites. During the growing season, when there was no standing water, the CO 2 emissions were significantly larger from the LFS (244 ± 24.88 mg CO 2 -C m −2 h −1 ) than the SFS (183 ± 14.90 mg CO 2 -C m −2 h −1 ). Fluxes of N 2 O ranged from −0.37 to 0.65 mg N 2 O-N m −2 h −1 at the LFS and from −0.50 to 0.55 mg N 2 O-N m −2 h −1 at the SFS, with the larger emissions associated with the presence of standing water at the LFS but during the growing season at the SFS. Overall, soil temperature and moisture were identified as the main drivers of the seasonal changes in CO 2 fluxes, but neither adequately explained the variations in N 2 O fluxes. Analysis of total C, N, microbial biomass and Q 10 values indicated that the higher CO 2 emissions from the LFS were linked to the flooding-associated influx of nutrients and alterations in soil microbial populations. These results demonstrate that annual CO 2 and N 2 O emissions can be higher in longer-term flooded sites that receive significant amounts of nutrients, although this may depend on the restriction of diffusional limitations due to the presence of standing water to periods of the year when the potential for gaseous emissions are low.

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“…Consequently, the field site has been the focus of recent research into carbon release, pollutant dynamics, and peatland restoration (e.g. Clay et al 2012;Dixon et al 2014;Cole et al 2014;Shuttleworth et al 2014Shuttleworth et al , 2015.…”

Section: Field Areamentioning

confidence: 99%

Contaminated sediment dynamics in peatland headwater catchments

et al. 2017

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Abstract:Purpose: Despite substantial research into Pb storage in peatlands, formal description of the mechanisms of contaminated sediment mobilisation is limited. This study explores the controlling factors of contaminated sediment dynamics in an eroding peatland in the Peak District National Park, UK.Materials and methods: This study uses the Pb contamination stored near the peat's surface as a fingerprint to trace contaminated sediment dynamics in three severely degraded headwater catchments. A field portable XRF analyser was used across a range of catchment surfaces to examine patterns of contaminant storage and release.Results and discussion: Lead concentrations varied greatly over a small spatial scale. Erosion is exposing high concentrations of Pb on interfluve surfaces (up to 1660 µg g-1), and substantial amounts of reworked contaminated material (up to 1010 µg g-1) are stored on other catchment surfaces (gully walls and floors). A variety of factors have been shown to significantly control Pb release and storage in this environment, including wind action, aspect, and gully depth. Vegetation also plays an important role in retaining sediment-bound heavy metals within contaminated peat catchments.Conclusions: This study provides the first comprehensive overview of the mechanisms controlling Pb release and storage in degraded peatlands. Previous assessments of Pb fluxes may have underestimated contaminant export from severely degraded systems. Wind has also been identified as an as yet unaccounted for vector for heavy metal transport in peatland environments. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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Restoration effects on water table depths and CO2 fluxes from climatically marginal blanket bog

Cited by 31 publications

References 61 publications

A 5-year study of the impact of peatland revegetation upon DOC concentrations

A 5-year study of the impact of peatland revegetation upon DOC concentrations

Flooding-related increases in CO<sub>2</sub> and N<sub>2</sub>O emissions from a temperate coastal grassland ecosystem

Contaminated sediment dynamics in peatland headwater catchments

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Restoration effects on water table depths and CO2 fluxes from climatically marginal blanket bog

Cited by 31 publications

References 61 publications

A 5-year study of the impact of peatland revegetation upon DOC concentrations

A 5-year study of the impact of peatland revegetation upon DOC concentrations

Flooding-related increases in CO&lt;sub&gt;2&lt;/sub&gt; and N&lt;sub&gt;2&lt;/sub&gt;O emissions from a temperate coastal grassland ecosystem

Contaminated sediment dynamics in peatland headwater catchments

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Flooding-related increases in CO<sub>2</sub> and N<sub>2</sub>O emissions from a temperate coastal grassland ecosystem