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Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire

Abbey L Marcotte Orcid Logo, Juul Limpens Orcid Logo, Claire M Belcher Orcid Logo, Richard C Chiverrell Orcid Logo, Gareth D Clay Orcid Logo, Stefan Doerr Orcid Logo, Stefan Krause Orcid Logo, Kieran Khamis Orcid Logo, Rúna Í Magnússon Orcid Logo, Jonay Neris Tome, João Pedro Nunes Orcid Logo, David P Pompeani Orcid Logo, Cristina Santin Nuno, Emma L Shuttleworth Orcid Logo, Sami Ullah Orcid Logo, Jeff Warburton Orcid Logo, Nicholas Kettridge Orcid Logo

Environmental Research: Water, Volume: 1, Issue: 1, Start page: 011001

Swansea University Authors: Stefan Doerr Orcid Logo, Jonay Neris Tome, Cristina Santin Nuno

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DOI (Published version): 10.1088/3033-4942/add04a

Abstract

Climate change is increasing wildfire frequency and severity, expanding into ecosystems less historically prone to wildfires, such as temperate peatlands. These peatlands are significant potable water sources that have accumulated legacy contaminants for decades. A major concern and uncertainty for...

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Published in: Environmental Research: Water
ISSN: 3033-4942
Published: IOP Publishing 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa69440
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These peatlands are significant potable water sources that have accumulated legacy contaminants for decades. A major concern and uncertainty for ecosystem health and drinking water supply is the timing and magnitude of pollutant release, particularly potentially harmful metals, following extreme disturbances. Here, we examine mobilisation of legacy metals in a contaminated temperate blanket peatland following extreme drought and wildfire occurrence, focussing on key metal sources, transport pathways and deposition on the lake-bed of the receiving reservoir. We found that erosion of metal-rich hillslope peat and ash peaked three months post-wildfire, particularly in extreme burn severity areas, contributing to substantial deposition of metal-rich material in the receiving reservoir. Elevated metal concentrations in suspended sediments were observed nine months post-wildfire during spring rainstorm events. Dissolved metals in the streamflow were comparatively orders of magnitude lower, but displayed similar timing in concentration increases. Together this indicates limited acute but potential chronic impacts that extend beyond our study&#x2019;s monitoring period. These pathways can present different challenges for managing water supplies. Our findings provide critical insights into the spatio-temporal dynamics of metal transport in peatlands following severe drought and wildfire. 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spelling 2025-05-07T10:53:57.2591249 v2 69440 2025-05-07 Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire 575eb5094f2328249328b3e43deb5088 0000-0002-8700-9002 Stefan Doerr Stefan Doerr true false bc8475d9297bd8441f68d13a94585ce1 Jonay Neris Tome Jonay Neris Tome true false 993c82cbaf875c1268156360e83c4dfd Cristina Santin Nuno Cristina Santin Nuno true false 2025-05-07 BGPS Climate change is increasing wildfire frequency and severity, expanding into ecosystems less historically prone to wildfires, such as temperate peatlands. These peatlands are significant potable water sources that have accumulated legacy contaminants for decades. A major concern and uncertainty for ecosystem health and drinking water supply is the timing and magnitude of pollutant release, particularly potentially harmful metals, following extreme disturbances. Here, we examine mobilisation of legacy metals in a contaminated temperate blanket peatland following extreme drought and wildfire occurrence, focussing on key metal sources, transport pathways and deposition on the lake-bed of the receiving reservoir. We found that erosion of metal-rich hillslope peat and ash peaked three months post-wildfire, particularly in extreme burn severity areas, contributing to substantial deposition of metal-rich material in the receiving reservoir. Elevated metal concentrations in suspended sediments were observed nine months post-wildfire during spring rainstorm events. Dissolved metals in the streamflow were comparatively orders of magnitude lower, but displayed similar timing in concentration increases. Together this indicates limited acute but potential chronic impacts that extend beyond our study’s monitoring period. These pathways can present different challenges for managing water supplies. Our findings provide critical insights into the spatio-temporal dynamics of metal transport in peatlands following severe drought and wildfire. Understanding these pathways is essential for assessing current and future risks to water quality and developing targeted management strategies in northern peatland regions that are reliant on peat-rich catchments for drinking water and that are increasingly vulnerable to climate-induced disturbances. Journal Article Environmental Research: Water 1 1 011001 IOP Publishing 3033-4942 water security, legacy metal pollutants, wildfire impacts, climate change 2 5 2025 2025-05-02 10.1088/3033-4942/add04a Letter COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Not Required Natural Environment Research Council (NERC) Grants: NE/R011125/1; NE/S011560/1 2025-05-07T10:53:57.2591249 2025-05-07T10:39:21.5135046 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Abbey L Marcotte 0000-0003-4149-3473 1 Juul Limpens 0000-0001-5779-0304 2 Claire M Belcher 0000-0003-3496-8290 3 Richard C Chiverrell 0000-0002-7307-2756 4 Gareth D Clay 0000-0002-8477-2774 5 Stefan Doerr 0000-0002-8700-9002 6 Stefan Krause 0000-0003-2521-2248 7 Kieran Khamis 0000-0002-5203-3221 8 Rúna Í Magnússon 0000-0003-2254-2612 9 Jonay Neris Tome 10 João Pedro Nunes 0000-0002-0164-249X 11 David P Pompeani 0000-0002-3571-4586 12 Cristina Santin Nuno 13 Emma L Shuttleworth 0000-0003-0661-1366 14 Sami Ullah 0000-0002-9153-8847 15 Jeff Warburton 0000-0003-3589-9039 16 Nicholas Kettridge 0000-0003-3995-0305 17 69440__34193__91b240287eee4dd6a755eb15a8babfa0.pdf pdf.pdf 2025-05-07T10:39:21.5131757 Output 2589610 application/pdf Version of Record true © 2025 The Author(s). Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. true eng http://creativecommons.org/licenses/by/4.0
title Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
spellingShingle Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
Stefan Doerr
Jonay Neris Tome
Cristina Santin Nuno
title_short Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
title_full Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
title_fullStr Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
title_full_unstemmed Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
title_sort Potable water sources in a contaminated temperate peatland resistant to acute impacts but vulnerable to legacy effects of extreme wildfire
author_id_str_mv 575eb5094f2328249328b3e43deb5088
bc8475d9297bd8441f68d13a94585ce1
993c82cbaf875c1268156360e83c4dfd
author_id_fullname_str_mv 575eb5094f2328249328b3e43deb5088_***_Stefan Doerr
bc8475d9297bd8441f68d13a94585ce1_***_Jonay Neris Tome
993c82cbaf875c1268156360e83c4dfd_***_Cristina Santin Nuno
author Stefan Doerr
Jonay Neris Tome
Cristina Santin Nuno
author2 Abbey L Marcotte
Juul Limpens
Claire M Belcher
Richard C Chiverrell
Gareth D Clay
Stefan Doerr
Stefan Krause
Kieran Khamis
Rúna Í Magnússon
Jonay Neris Tome
João Pedro Nunes
David P Pompeani
Cristina Santin Nuno
Emma L Shuttleworth
Sami Ullah
Jeff Warburton
Nicholas Kettridge
format Journal article
container_title Environmental Research: Water
container_volume 1
container_issue 1
container_start_page 011001
publishDate 2025
institution Swansea University
issn 3033-4942
doi_str_mv 10.1088/3033-4942/add04a
publisher IOP Publishing
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description Climate change is increasing wildfire frequency and severity, expanding into ecosystems less historically prone to wildfires, such as temperate peatlands. These peatlands are significant potable water sources that have accumulated legacy contaminants for decades. A major concern and uncertainty for ecosystem health and drinking water supply is the timing and magnitude of pollutant release, particularly potentially harmful metals, following extreme disturbances. Here, we examine mobilisation of legacy metals in a contaminated temperate blanket peatland following extreme drought and wildfire occurrence, focussing on key metal sources, transport pathways and deposition on the lake-bed of the receiving reservoir. We found that erosion of metal-rich hillslope peat and ash peaked three months post-wildfire, particularly in extreme burn severity areas, contributing to substantial deposition of metal-rich material in the receiving reservoir. Elevated metal concentrations in suspended sediments were observed nine months post-wildfire during spring rainstorm events. Dissolved metals in the streamflow were comparatively orders of magnitude lower, but displayed similar timing in concentration increases. Together this indicates limited acute but potential chronic impacts that extend beyond our study’s monitoring period. These pathways can present different challenges for managing water supplies. Our findings provide critical insights into the spatio-temporal dynamics of metal transport in peatlands following severe drought and wildfire. Understanding these pathways is essential for assessing current and future risks to water quality and developing targeted management strategies in northern peatland regions that are reliant on peat-rich catchments for drinking water and that are increasingly vulnerable to climate-induced disturbances.
published_date 2025-05-02T05:29:37Z
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score 11.096275

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