Mulching During Boreal Resource Development Alters Near‐Surface Hydrophysical Properties and Triggers Episodic Methane Emissions in Peatland Soils.
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| Title: | Mulching During Boreal Resource Development Alters Near‐Surface Hydrophysical Properties and Triggers Episodic Methane Emissions in Peatland Soils. |
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| Authors: | Balliston, Nicole E.1 (AUTHOR) nballiston@uwaterloo.ca, Davies, Marissa A.1 (AUTHOR), Martin, Kayla J.1 (AUTHOR), Strack, Maria1 (AUTHOR) |
| Source: | Ecohydrology. May2025, Vol. 18 Issue 3, p1-13. 13p. |
| Subject Terms: | *Carbon cycle, *Greenhouse gases, *Soil composition, *Water table, *Carbon emissions |
| Abstract: | Linear disturbances within boreal Canada (e.g. seismic lines) can significantly disrupt carbon cycling in northern peatlands, potentially transforming these significant carbon stocks from long‐term carbon sinks into net carbon sources. Recent efforts have been made to quantify the impacts of linear disturbance on vegetation, soil composition and greenhouse gas (GHG) emissions. However, little is known about the specific interactions between disturbances to peat hydrophysical structure and composition and the resulting alterations to CO2 and CH4 dynamics. To this end, eight poor fen peat cores were collected on, and eight cores collected adjacent to a seismic line representing the top 10 cm of the peat profile. These cores reflected four degrees of disturbance, with four cores per treatment: complete mulch covering, partial mulch covering, mechanical roughing only and undisturbed. In controlled laboratory conditions, cores were subjected to two subsequent static water table conditions (3 and 8 cm below the core surface) for ~30 days each with GHG flux measurements occurring every 2–3 days. Cores were then subdivided into 5 cm segments and underwent hydrophysical (i.e., bulk density, porosity and water retention) and compositional (i.e., C:N and vegetational assemblage) analysis. Results show that peat composition and hydrophysical structure were both strong predictors of GHG emissions. Higher CO2 emissions were related to peat with high bulk density, low total and effective porosity and low C:N ratios, which occurred at depth in the undisturbed cores and at the surface where mechanical mulching and mixing occurred. Increased CH4 emissions occurred in a subset of disturbed cores characterized by a reduction in macropores and effective porosity near the surface; these emissions were episodic and occurred where trapped gas was released. Further field‐scale research is needed to evaluate the interrelationships between the direct impacts of seismic line creation on hydrophysical structure and composition and the long‐term changes in carbon cycling within disturbed systems. [ABSTRACT FROM AUTHOR] |
| Copyright of Ecohydrology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 185453137 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mulching During Boreal Resource Development Alters Near‐Surface Hydrophysical Properties and Triggers Episodic Methane Emissions in Peatland Soils. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Balliston%2C+Nicole E%2E%22">Balliston, Nicole E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nballiston@uwaterloo.ca</i><br /><searchLink fieldCode="AR" term="%22Davies%2C+Marissa A%2E%22">Davies, Marissa A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Martin%2C+Kayla J%2E%22">Martin, Kayla J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Strack%2C+Maria%22">Strack, Maria</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ecohydrology%22">Ecohydrology</searchLink>. May2025, Vol. 18 Issue 3, p1-13. 13p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Carbon+cycle%22">Carbon cycle</searchLink><br />*<searchLink fieldCode="DE" term="%22Greenhouse+gases%22">Greenhouse gases</searchLink><br />*<searchLink fieldCode="DE" term="%22Soil+composition%22">Soil composition</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+table%22">Water table</searchLink><br />*<searchLink fieldCode="DE" term="%22Carbon+emissions%22">Carbon emissions</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Linear disturbances within boreal Canada (e.g. seismic lines) can significantly disrupt carbon cycling in northern peatlands, potentially transforming these significant carbon stocks from long‐term carbon sinks into net carbon sources. Recent efforts have been made to quantify the impacts of linear disturbance on vegetation, soil composition and greenhouse gas (GHG) emissions. However, little is known about the specific interactions between disturbances to peat hydrophysical structure and composition and the resulting alterations to CO2 and CH4 dynamics. To this end, eight poor fen peat cores were collected on, and eight cores collected adjacent to a seismic line representing the top 10 cm of the peat profile. These cores reflected four degrees of disturbance, with four cores per treatment: complete mulch covering, partial mulch covering, mechanical roughing only and undisturbed. In controlled laboratory conditions, cores were subjected to two subsequent static water table conditions (3 and 8 cm below the core surface) for ~30 days each with GHG flux measurements occurring every 2–3 days. Cores were then subdivided into 5 cm segments and underwent hydrophysical (i.e., bulk density, porosity and water retention) and compositional (i.e., C:N and vegetational assemblage) analysis. Results show that peat composition and hydrophysical structure were both strong predictors of GHG emissions. Higher CO2 emissions were related to peat with high bulk density, low total and effective porosity and low C:N ratios, which occurred at depth in the undisturbed cores and at the surface where mechanical mulching and mixing occurred. Increased CH4 emissions occurred in a subset of disturbed cores characterized by a reduction in macropores and effective porosity near the surface; these emissions were episodic and occurred where trapped gas was released. Further field‐scale research is needed to evaluate the interrelationships between the direct impacts of seismic line creation on hydrophysical structure and composition and the long‐term changes in carbon cycling within disturbed systems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ecohydrology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/eco.70025 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Carbon cycle Type: general – SubjectFull: Greenhouse gases Type: general – SubjectFull: Soil composition Type: general – SubjectFull: Water table Type: general – SubjectFull: Carbon emissions Type: general Titles: – TitleFull: Mulching During Boreal Resource Development Alters Near‐Surface Hydrophysical Properties and Triggers Episodic Methane Emissions in Peatland Soils. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Balliston, Nicole E. – PersonEntity: Name: NameFull: Davies, Marissa A. – PersonEntity: Name: NameFull: Martin, Kayla J. – PersonEntity: Name: NameFull: Strack, Maria IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 19360584 Numbering: – Type: volume Value: 18 – Type: issue Value: 3 Titles: – TitleFull: Ecohydrology Type: main |
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