Carbon dioxide sink function in restored milled peatlands – The significance of weather and vegetation

Purre, Anna‐Helena; Pajula, Raimo; Ilomets, Mati

doi:10.1016/j.geoderma.2019.03.032

Cited by 11 publications

(16 citation statements)

References 60 publications

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“…The C sink values found in the in situ detailed assessment were consistent with the results obtained in previous studies that use models based on allometric equations to calculate plant biomass, on annual plant growth rates of the species, or even gas interchange to estimate the annual rates of sequestration and carbon storage [21,27,28,[41][42][43][44][45]. This sink ability of naturally vegetated areas used for grazing has been shown to be mainly supported by woody vegetation, where shrublands have played a relevant role in parallel to forests.…”

Section: Methodological Advances In Estimating the C Sink Capacity Of Pastoral Livestock And Its Incorporation Into The Calculation Of Thsupporting

confidence: 88%

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

et al. 2021

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Exploring and developing new tools for the accounting and management of natural C sinks will provide a closer, more accurate option to remark the importance of such sinks in relation to livestock production, helping to support the persistence of some seriously endangered traditional, environmentally sustainable livestock farming. Following both precision and usability criteria, two main C sink databases covering the Andalusian region (S Spain) were developed from the Spanish Land Parcel Identification System (SIGPAC, coarse resolution) and the Spanish Information System on Land Cover (SIOSE, finer resolution) land use classes. Particular C sink factors based on growth rates for individual plant species were associated with detailed vegetation maps and, further, were linked to Land Use and Covers cartography across the region. In addition, eight ruminant farms were exhaustively studied in situ and used as a control. Results were compared with the obtained through the application of the developed C sink databases, and with the commonly used Petersen methodology. The sink capacity of vegetation associated with farms varied from 0.25 to 1.37 t CO2 ha−1 year−1, depending on the plant species composition and abundance. All the approaches showed significant differences from the control. C sink values were significantly higher when applying SIGPAC-based C sink database to farms, while values from the SIOSE and Petersen methodology approaches provided more moderate values, closer to the control. SIGPAC and Petersen approaches showed higher usability but presented lower precision due to a poor definition of plant cover. SIOSE-based C sink database provided suitable values able to be adapted to reality and used by farmers. In this regard, further research efforts to improve the adjustment of results and ease of use are required. The present approach means a methodological advance in the estimation of the C sink capacity associated with pastoral livestock farms, able to be incorporated into the CF calculation in contrasted areas worldwide, in the frame of the ‘eco-schemes’ being recently under development through the EU CAP.

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Section: Methodological Advances In Estimating the C Sink Capacity Of Pastoral Livestock And Its Incorporation Into The Calculation Of Thsupporting

confidence: 88%

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

et al. 2021

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“…Second, the study covered only one growing season, so the annual balances of CO 2 cannot be derived from this. The CO 2 sequestration of the sites presented here are also strongly affected by weather conditions during that year, so they can differ from other years with varying conditions as shown at the Hara rewetted site by Purre et al (2019a). Also, although all of the sites were open peatland sites, the CO 2 exchange and biomass related with scarce tree cover were not accounted for in any of the studied sites.…”

Section: Limitations Of the Studymentioning

confidence: 66%

“…Where parameters r0 and b are respectively the respiration at the 0°C temperature and the sensitivity of respiration to air temperature, and T AIR is the air temperature (°C). CO 2 measurements and reconstructions are described in more detail in Purre et al (2019aPurre et al ( , 2019b 3. Results…”

Section: Co 2 Ux Measurements and Data Processingmentioning

confidence: 99%

Time Since Rewetting Defines Vegetation Composition and Carbon Dioxide Fluxes on Former Milled Peatlands - Comparison With Undisturbed Bogs

Purre

Ilomets

2021

Preprint

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Rewetting is the most common restoration approach for milled peatlands in Europe, with the aim of creating suitable conditions for the development of peatland specific plant cover and carbon accumulation. Therefore, it is important to determine if time since rewetting is pivotal for milled peatlands to become functionally and structurally similar to their undisturbed counterparts. We investigate the temporal succession in rewetted peatlands in Estonia by a chronosequence of 4, 15, and 35 years before the measurements. Plant functional type (PFT) cover and biomass, bryophyte production and CO2 fluxes were measured on two milled peatlands, as well as undisturbed bogs adjacent to milled peatlands. Differences in vegetation composition and CO2 fluxes between the sites were greater for rewetted than undisturbed sites. The most recently rewetted site was mainly covered in bare peat and Eriophorum vaginatum and was a CO2 source. On the rewetted site of 15 years, Sphagnum was present in addition to ombrotrophic sedges, and in the rewetted site of 35 years, lawn-hollow microtopography is starting to develop with various PFTs. Both of these sites were CO2 sinks. Lawn Sphagnum was abundant on the two older rewetted sites, and was connected with CO2 sink functioning in the rewetted sites. Still, hummock Sphagnum species, which were present in undisturbed bogs, were absent from all of the rewetted sites. With time, CO2 fluxes, microtopography and vegetation develop after rewetting in the direction of undisturbed bogs, while vegetation composition still differs from the reference sites even 35 years after rewetting.

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“…Moreover, Purre et al. (2019) indicate that bogs dominated by Sphagnum in Estonia with a WT between −45 and −50 cm explain a small part of the variation in R eco (<3%), which increases substantially (40%) with a WT of −16 cm. However, R eco rates were higher at sites with deeper WT (WT = −48; R eco = 128 mg CO 2 m −2 h −1 ), than in areas with higher WT (WT = −16 cm; R eco = 98 mg CO 2 m −2 h −1 ).…”

Section: Direct Anthropogenic Disturbances Exerted On Sphagnum Mosses...mentioning

confidence: 99%

Sphagnum mosses, the impact of disturbances and anthropogenic management actions on their ecological role in CO₂ fluxes generated in peatland ecosystems

Pacheco‐Cancino,

Carrillo‐López,

Sepulveda‐Jauregui

et al. 2023

Global Change Biology

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Mosses of the genus Sphagnum are the dominant vegetation in most pristine peatlands in temperate and high‐latitude regions. They play a crucial role in carbon sequestration, being responsible for ca. 50% of carbon accumulation through their active participation in peat formation. They have a significant influence on the dynamics of CO2 emissions due to an efficient maximum potential photosynthetic rate, lower respiration rates, and the production of a recalcitrant litter whose decomposition is gradual. However, various anthropogenic disturbances and land use management actions that favor its reestablishment have the potential to modify the dynamics of these CO2 emissions. Therefore, the objective of this review is to discuss the role of Sphagnum in CO2 emissions generated in peatland ecosystems, and to understand the impacts of anthropogenic practices favorable and detrimental to Sphagnum on these emissions. Based on our review, increased Sphagnum cover reduces CO2 emissions and fosters C sequestration, but drainage transforms peatlands dominated by Sphagnum into a persistent source of CO2 due to lower gross primary productivity of the moss and increased respiration rates. Sites with moss removal used as donor material for peatland restoration emit twice as much CO2 as adjacent undisturbed natural sites, and those with commercial Sphagnum extraction generate almost neutral CO2 emissions, yet both can recover their sink status in the short term. The reintroduction of fragments and natural recolonization of Sphagnum in transitional peatlands, can reduce emissions, recover, or increase the CO2 sink function in the short and medium term. Furthermore, Sphagnum paludiculture is seen as a sustainable alternative for the use of transitional peatlands, allowing moss production strips to become CO2 sink, however, it is necessary to quantify the emissions of all the components of the field of production (ditches, causeway), and the biomass harvested from the moss to establish a final closing balance of C.

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Carbon dioxide sink function in restored milled peatlands – The significance of weather and vegetation

Cited by 11 publications

References 60 publications

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

Time Since Rewetting Defines Vegetation Composition and Carbon Dioxide Fluxes on Former Milled Peatlands - Comparison With Undisturbed Bogs

Sphagnum mosses, the impact of disturbances and anthropogenic management actions on their ecological role in CO₂ fluxes generated in peatland ecosystems

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Carbon dioxide sink function in restored milled peatlands – The significance of weather and vegetation

Cited by 11 publications

References 60 publications

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

Natural Carbon Sinks Linked to Pastoral Activity in S Spain: A Territorial Evaluation Methodology for Mediterranean Goat Grazing Systems

Time Since Rewetting Defines Vegetation Composition and Carbon Dioxide Fluxes on Former Milled Peatlands - Comparison With Undisturbed Bogs

Sphagnum mosses, the impact of disturbances and anthropogenic management actions on their ecological role in CO2 fluxes generated in peatland ecosystems

Contact Info

Product

Resources

About

Sphagnum mosses, the impact of disturbances and anthropogenic management actions on their ecological role in CO₂ fluxes generated in peatland ecosystems