Effect of peat re-wetting on carbon and nutrient fluxes, greenhouse gas production and diversity of methanogenic archaeal community

Urbanová, Zuzana; Picek, Tomáš; Bárta, Jiří

doi:10.1016/j.ecoleng.2010.07.012

Cited by 57 publications

(49 citation statements)

References 49 publications

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“…While being nutrient-rich, Site B is still very much "extensive" given the low artificial N input. Our values are, however, comparable to Dutch figures reported by Langeveld et al (1997) and van Beek et al (2011) where grasslands had typically less fertiliser and manure inputs over time. Overall, our results are not sufficient to conclude firmly on the insignificance of N 2 O fluxes in extensive grassland over organic soils and further investigations in this area are warranted to ascertain the potential for large denitrification losses.…”

Section: Magnitude Of Ch 4 and N 2 O Fluxessupporting

confidence: 43%

“…The implication is that physical and biogeochemical soil conditions (nutrient content, organic matter quality and water table levels) as well as local management practices and subtle climatic variations exert strong influences on C loss (Drösler et al, 2008). In addition, drainage of temperate organic soils typically leads to higher dissolved organic C (DOC) fluxes (Wallage et al, 2006;Urbanová et al, 2011), so that management practices may alter both contemporary photosynthetic uptake rates, but also the stability of older soil stores of sequestered C. Further, although fluvial C exports are increasingly recognised as potentially significant components of terrestrial C balances, full accounting of all fluvial C forms remains the exception rather than the rule, notably for dissolved inorganic and particulate organic C.…”

Section: F Renou-wilson Et Al: the Impacts Of Drainage Nutrient Stmentioning

confidence: 99%

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The impacts of drainage, nutrient status and management practice on the full carbon balance of grasslands on organic soils in a maritime temperate zone

et al. 2014

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Abstract. Temperate grasslands on organic soils are diverse due to edaphic properties but also to regional management practices and this heterogeneity is reflected in the wide range of greenhouse gas (GHG) flux values reported in the literature. In Ireland, most grasslands on organic soils were drained several decades ago and are managed as extensive pastures with little or no fertilisation. This study describes a 2-year study of the net ecosystem carbon balance (NECB) of two such sites. We determined GHG fluxes and waterborne carbon (C) emissions in a nutrient-rich grassland and compared it with values measured from two nutrient-poor organic soils: a deep-drained and a shallow-drained site. Carbon dioxide (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O) fluxes were determined using the chamber technique, and fluvial C fluxes were estimated by combining drainage water concentrations and flows.The nutrient-rich site was an annual source of CO 2 (233 g C m −2 yr −1 ), CH 4 neutral, and a small source of N 2 O (0.16 g N 2 O-N m −2 yr −1 ). Net ecosystem exchange (NEE) at the shallow-drained nutrient-poor site was −89 and −99 g C m −2 yr −1 in Years 1 and 2 respectively, and NEE at the deep-drained nutrient-poor site was 85 and −26 g C m −2 yr −1 respectively. Low CH 4 emissions (1.3 g C m −2 yr −1 ) were recorded at the shallow-drained nutrient-poor site. Fluvial exports from the nutrient-rich site totalled 69.8 g C m −2 yr −1 with 54 % as dissolved organic C. Waterborne C losses from the nutrient-poor site reflected differences in annual runoff totalling 44 g C m −2 yr −1 in Year 1 and 30.8 g C m −2 yr −1 in Year 2.The NECB of the nutrient-rich grassland was 663 g C m −2 yr −1 with biomass exports being the major component accounting for 53 %. The NECB of the nutrient-poor deep-drained site was less than half of the nutrient-rich site (2-year mean 267 g C m −2 yr −1 ). Although NEE at the nutrient-poor shallow-drained site was negative in both years, high biomass export meant it was a net C source (2-year mean NECB 103 g C m −2 yr −1 ). While the impacts of the nutrient and drainage status on NEE, biomass exports and fluvial C losses were confirmed, inter-regional differences in management practice and climate were also significant factors which impacted on the overall NECB of these ecosystems. Contrary to expectation, the NECB of nutrient-poor drained organic soils under grasslands is not necessarily a large C source and this has implications for Ireland's choice of national GHG inventory reporting methodologies. This study can also aid the development of strategies to deliver reduced emissions tailored to local grassland types.

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Section: Magnitude Of Ch 4 and N 2 O Fluxessupporting

confidence: 43%

Section: F Renou-wilson Et Al: the Impacts Of Drainage Nutrient Stmentioning

confidence: 99%

The impacts of drainage, nutrient status and management practice on the full carbon balance of grasslands on organic soils in a maritime temperate zone

et al. 2014

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“…Site-specific predictor of methane fluxes could be connected to land use changes at BU. In general, drained peatlands usually emitted less methane in contrast to intact peatlands (Urbanová et al 2011). The reason is thinning of the substrate zone hosting methanogens and aeration of the upper part of the peat.…”

Section: Resultsmentioning

confidence: 99%

Dynamics of methane fluxes from two peat bogs in the Ore Mountains, Czech Republic

Bohdálková¹,

Čuřík²,

Kubêna³

et al. 2013

PLANT SOIL ENVIRON

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Methane fluxes were studied at two high-elevation oligotrophic peat bogs in the Ore Mts., Czech Republic. The Bukova dolina Bog was drained 15 years ago and 2 years ago was partly restored, whereas the Brumiste Bog is an intact peatland. Draining led to a change of vegetation structure, dominated by Molinia caerulea, Carex sp., and forestation by Norway spruce. Methane fluxes were measured monthly from April to November 2011 using a closed chamber. Temperature and presence of Carex were significant controls on methane fluxes. Peat depth, water table and the presence of other plant species had no significant effect on CH 4 emissions. Methane emissions ranged from 9 to 2700 mg/m 2 /day at the degraded and from 3 to 260 mg/m 2 /day at the intact bog. In general, the degraded peat bog emitted three times more methane compared to the intact peat bog, likely due to vegetation changes after longterm artificial draining.

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“…Re-wetting decreases nitrogen (N) mineralisation (Urbanová et al, 2011), but may lead to the enhancement of P mobilisation (Tiemeyer et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The short-term effects of management changes on watertable position and nutrients in shallow groundwater in a harvested peatland forest

Finnegan

Regan

Fenton

et al. 2014

Journal of Environmental Management

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Effect of peat re-wetting on carbon and nutrient fluxes, greenhouse gas production and diversity of methanogenic archaeal community

Cited by 57 publications

References 49 publications

The impacts of drainage, nutrient status and management practice on the full carbon balance of grasslands on organic soils in a maritime temperate zone

The impacts of drainage, nutrient status and management practice on the full carbon balance of grasslands on organic soils in a maritime temperate zone

Dynamics of methane fluxes from two peat bogs in the Ore Mountains, Czech Republic

The short-term effects of management changes on watertable position and nutrients in shallow groundwater in a harvested peatland forest

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