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Reposted by David Olefeldt

Dr. Merritt Rae Turetsky @queenofpeat.bsky.social · 26/06/2026

Ever wonder why bogs and fens are simultaneously magical, mysterious, and spooky? Bogland is my ode to these paradoxical ecosystems, and a call to action. Barnes & Noble members will receive 25% off pre-orders made by TOMORROW Jun 26 (code PREORDER25. www.barnesandnoble.com/w/bogland-me...

barnesandnoble.com

Bogland: The Secret World That Defies Death and Protects Life

Barnes & Noble’s online bookstore for books, NOOK ebooks & magazines. Shop music, movies, toys & games, too. Receive free shipping with your Barnes & Noble Membership.

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David Olefeldt @olefeldt.bsky.social · 08/05/2026

New study by Julia Orlova: Variability of stream DOC and its chemical composition on the Boreal Plains of western Canada have key differences when compared to other peatland-rich boreal regions - due to a combination of bedrock geology, surficial geology, and climate. doi.org/10.1002/hyp....

doi.org

Climate and Landscape Controls on Dissolved Organic Matter in Wetland‐Dominated Catchments of the Boreal Plains, Canada

In the subhumid, wetland-rich, geologically heterogeneous Boreal Plains region of Canada, we found several controls on stream DOC concentration ([DOC]) and DOM composition: An increase in [DOC] and ...

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David Olefeldt @olefeldt.bsky.social · 21/03/2026

I got to talk about the impact of wildfires on the carbon balance of permafrost peatlands on CBC yesterday - especially on the work done by Christopher Schulze in northern Alberta. www.cbc.ca/listen/live-... doi.org/10.1029/2025...

cbc.ca

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David Olefeldt @olefeldt.bsky.social · 03/12/2025

Wildfire causes accelerated permafrost thaw in northern peatlands due to summer-time processes (reduced shading and soil heating) not due to winter-time processes (snow dynamics). Patience pays off - I helped instrument the site in 2014, and now completed by Stephanie Wright! doi.org/10.1002/ppp....

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David Olefeldt @olefeldt.bsky.social · 21/11/2025

Getting cold in Edmonton, so this morning it was perfect condition for pancake ice on the North Saskatchewan River.

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Reposted by David Olefeldt

Dr Scott J. Davidson @wetlandresilienceresearchgroup.com · 17/11/2025

Really pleased to be part of this new study led by Josh Hashemi showing that to accurately upscale CH₄ budgets, especially in complex landscapes, we need high-res data and land-cover classes that reflect the key enviro factors driving CH4 production and emissions www.nature.com/articles/s43...

nature.com

Coarse land cover datasets bias Arctic-Boreal wetland methane budgets - Communications Earth & Environment

Estimation of methane flux remained within 13% error at a resolution within 25 m, but resolutions coarser than 1 km often misclassified sites as methane sources instead of sinks, based on high-resolut...

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Reposted by David Olefeldt

Dr. Merritt Rae Turetsky @queenofpeat.bsky.social · 31/10/2025

Do you love bogs and Halloween? If so, please follow and share this thread to explore the eerie, the dark and the supernatural side of bog ecosystems. BogBoo. 1/ You are terrifying and strange and beautiful, something not everyone knows how to love. -Warsan Shire

Image of a misty spooky scene with fallen log, a pond, and patches of moss and other dark green vegetation.

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Reposted by David Olefeldt

Paul J. Morris @peatbloke.bsky.social · 17/10/2025

Exciting 24-month Postdoc opportunity for a peatland palaeoecologist, working with Dr Jenna Sutherland at Leeds Beckett U. on the NERC-funded InSPIRE project. Investigating initiation of new peatlands in deglaciating parts of Alaska, including fieldwork vacancies.leedsbeckett.ac.uk/ce0984li_web...

vacancies.leedsbeckett.ac.uk

Job profile

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David Olefeldt @olefeldt.bsky.social · 07/10/2025

So permafrost peatlands burn and they release lots of CO2 through combustion - but that's just the start. Christopher Schulze shows in a new GRL study that slow recovery causes continued CO2 losses in the following decade - overall similar in magnitude to the combustion! doi.org/10.1029/2025...

doi.org

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David Olefeldt @olefeldt.bsky.social · 04/09/2025

New Study in ES&T! Permafrost peatlands accumulate mercury from distant sources, but thaw causes collapse into wetter bogs and fens. Lauren Thompson shows that these bogs, and especially fens, become hotspots for mercury methylation, and potential downstream transport. pubs.acs.org/doi/10.1021/...

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David Olefeldt @olefeldt.bsky.social · 28/08/2025

New study where McKenzie Kuhn, I and co-authors show that accounting for differences among wetland and lake types is crucial for estimating current and future boreal-Arctic methane emissions – out now in Nature Climate Change. www.nature.com/articles/s41...

nature.com

Current and future methane emissions from boreal-Arctic wetlands and lakes - Nature Climate Change

How much methane will be emitted from the boreal-Arctic region under climate change is not well constrained. Here the authors show that accounting for distinct wetland and lake classes leads to lower ...

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David Olefeldt @olefeldt.bsky.social · 14/08/2025

Perfect day for measuring carbon dioxide and methane emissions from our thawed (former permafrost) fen in northern Alberta. 20 deg C, light breeze and almost no mosquitoes.

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Reposted by David Olefeldt

Guido Grosse @grosseguido.bsky.social · 28/07/2025

The term “abrupt permafrost thaw” is increasingly used in the scientific literature. The concept comes with challenges as authors look at “abrupt“ change with different perspectives on time scales, magnitudes, and impacts. Webb et al developed a new conceptual framework: doi.org/10.1007/s406...

doi.org

A Review of Abrupt Permafrost Thaw: Definitions, Usage, and a Proposed Conceptual Framework - Current Climate Change Reports

Purpose of Review We review how ‘abrupt thaw’ has been used in published studies, compare these definitions to abrupt processes in other Earth science disciplines, and provide a definitive framework f...

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Reposted by David Olefeldt

New Phytologist @newphyt.bsky.social · 19/07/2025

#TansleyReview: The challenging but unique eco-evolutionary aspects of #SphagnumMoss @queenofpeat.bsky.social, et al. 👇 📖 nph.onlinelibrary.wiley.com/doi/10.1111/... #LatestIssue

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David Olefeldt @olefeldt.bsky.social · 18/07/2025

I spent this week collecting river samples in northwestern Canada (Dehcho, Hay, and South Slave regions), an area the size of England with ~4,000 km of driving. And so much of the landscape is burned - we drove hours and hours through charred forests. The last decade has been unprecedented.

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David Olefeldt @olefeldt.bsky.social · 11/07/2025

The bog gives and the bog takes. Liam Heffernan's PhD site, the Lutose thermokarst big - photos from 2015 and today 10 years later... Note the trees dying in the background due to permafrost thaw, and the growth of Sphagnum mosses covering our once proud boardwalk!

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David Olefeldt @olefeldt.bsky.social · 07/07/2025

I have a fully funded PhD position open for start in Jan or May 2026. Field work in peatlands of the Northwest Territories, with lab work to understand potential downstream mobilization of carbon, nutrients, mercury after thaw or wildfire. Reach out for more information, and please send on!

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David Olefeldt @olefeldt.bsky.social · 26/06/2025

When the Arctic burns, the soils thaw. How much and for how long? Anna Talucci compiled depth of thaw measurements from 157 sites, now published in ESSD. Main impact occurs 4-10 years after fire, but effects remain 20+ years. Key information to estimate losses of soil C! doi.org/10.5194/essd...

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David Olefeldt @olefeldt.bsky.social · 04/06/2025

This new map provides a global view of the distribution of a multitude of aquatic ecosystems, including various wetlands. It's a pretty big step forward, and I look forward to seeing how it will be used e.g. to study wetland greenhouse gases. essd.copernicus.org/articles/17/...

essd.copernicus.org

Mapping the world's inland surface waters: an upgrade to the Global Lakes and Wetlands Database (GLWD v2)

Abstract. In recognition of the importance of inland waters, numerous datasets mapping their extents, types, or changes have been created using sources ranging from historical wetland maps to real-tim...

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Reposted by David Olefeldt

Justine Karst 🇨🇦 @j-karst.bsky.social · 16/05/2025

We are looking for a Canada Excellence Research Chair (CERC) in Community Ecology, Biological Invasions, Allelopathy, and Plant-Soil Feedbacks. Details here: universityaffairs.ca/search-job/?...

universityaffairs.ca

Search Jobs - University Affairs

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Reposted by David Olefeldt

Pep Canadell @pepcanadell.bsky.social · 13/05/2025

1/3 The new Global Methane Budget is now published, open access. essd.copernicus.org/articles/17/...

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Reposted by David Olefeldt

Gerald Jurasinski @terhorab.bsky.social · 27/04/2025

We are hiring. We are looking for an early career researcher to work with us in project MOOSland to investigate the effect of Sphagnum paludiculture on GHG exchange of rewetted peat. www.uni-greifswald.de/en/universit... @greifswaldmoor.bsky.social @unigreifswald.bsky.social

uni-greifswald.de

Research Fellow (Pre/Post-Doc) - Institute of Botany and Landscape Ecology 25/Wi16

Stellenausschreibung AG Morrforschung

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Reposted by David Olefeldt

Canadian Geophysical Union @cgu-ugc.bsky.social · 23/04/2025

We're new here! Help us connect with our members and interested followers 😀

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David Olefeldt @olefeldt.bsky.social · 20/03/2025

I run a mid-size research group (7 graduate students / staff, 3 field assistants) which focuses on field-based research in northern Canada. Last year (2024-2025) our total expenses were ~CAD$370,000, provided in grants from federal/provincial/industry agencies, and it was spent as shown below.

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Reposted by David Olefeldt

Dr Emma Shuttleworth @em-shuttleworth.bsky.social · 11/03/2025

JOB ALERT Exciting opportunity for a Lecturer (equivalent to Assistant Professor) in #PhysicalGeography specialising in #peatland science to join our #Geography department at @uniofmanchester.bsky.social. Full details for the job can be found here: www.jobs.manchester.ac.uk/Job/JobDetai...

jobs.manchester.ac.uk

Lecturer in Physical Geography :Oxford Road

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Reposted by David Olefeldt

Lorna Harris, PhD @lornaharris.bsky.social · 17/02/2025

Great short summary video of #permafrost! Not mentioned in the video... permafrost also includes peat in northern regions, incl. Canada. These are two small cores of ice-rich permafrost peat in Yukon. Placed on a pillow of fluffy Sphagnum moss for the photo 😀

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David Olefeldt @olefeldt.bsky.social · 07/02/2025

Winter field work at a thermokarst fen in northern Alberta by PhD student Finn Kurylowicz this week - chilly but very successful. The first winter for the eddy covariance set-up and it had collected data on almost all days since late November.

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David Olefeldt @olefeldt.bsky.social · 07/02/2025

This resonates with me - and I've seen this happen quickly. Fewer field trips for classes I teach (due to budgets and increased bureaucracy to make them happen) and for field research (more attention to field safety - good! - but more bureaucracy forces less ambitious plans).

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Reposted by David Olefeldt

Mike Peacock @peatymike.bsky.social · 03/02/2025

There's a postdoc in peatland biogeochemistry advertised on our project by Dolly Kothawala and Gustaf Granath at Uppsala University. I can highly recommend Uppsala as a place to live and work. www.uu.se/en/about-uu/...

uu.se

Postdoctoral position in peatland biogeochemistry - Uppsala University

Postdoctoral position in peatland biogeochemistry, Department of Ecology and Genetics, Uppsala University

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Reposted by David Olefeldt

Anna Virkkala @annvirkk.bsky.social · 28/01/2025

We are looking for a grant-funded doctoral resarcher on a project focusing on how tree and shrub expansion into the tundra impact biodiversity and carbon balance @Department of Geosciences and Geography @helsinkiuni.bsky.social! DM me if you are interested, and please share!

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David Olefeldt @olefeldt.bsky.social · 26/01/2025

One of my favorite things about #peatlands is their patterning at different scales caused by millennia of interplay between hydrology and peat accumulation - mainly Sphagnum mosses. Spent my Saturday evening looking at satellite images of the Hudson Bay Lowlands - a perfectly reasonable activity…

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Reposted by David Olefeldt

Mike Flannigan @mikeflannigan.bsky.social · 02/01/2025

Congratulations to Weiwei Wang (early career researcher) on her paper in Science out today - 'Canadian forests are more conducive to high-severity fires in recent decades' largely due to increases in fuel aridity. www.science.org/doi/10.1126/...

science.org

Canadian forests are more conducive to high-severity fires in recent decades

Canada has experienced more-intense and longer fire seasons with more-frequent uncontrollable wildfires over the past decades. However, the effect of these changes remains unknown. This study identifi...

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Reposted by David Olefeldt

Permafrost Pathways @permafrostpathways.bsky.social · 23/01/2025

“It is the first time that we’re seeing this shift at such a large scale, cumulatively across all of the tundra. That’s a pretty big deal,” Sue Natali, a co-author and lead researcher on the study at @woodwellclimate.bsky.social told @theguardian.com www.theguardian.com/environment/...

theguardian.com

A third of the Arctic’s vast carbon sink now a source of emissions, study reveals

Critical CO2 stores held in permafrost are being released as the landscape changes with global heating, report shows

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Reposted by David Olefeldt

Gerard Rocher-Ros @grocherros.bsky.social · 14/01/2025

I'm hiring, two fully funded PhD positions! Come work in Umeå in Arctic Sweden, a leading place for high-latitude ecosystem ecology and carbon biogeochemistry

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David Olefeldt @olefeldt.bsky.social · 07/01/2025

First lecture of the semester, and a new course on Water Resource Management. Most of my winter "break" was used to prepare for the course. What are your best examples of Canadian water resource management issues that I should highlight?

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Reposted by David Olefeldt

Kevin McGuire @kjmcguire.bsky.social · 04/01/2025

No doubt an important paper by @goldenwater.bsky.social and others. Headwater systems are a critical interface between groundwater, surface water and the landscape, and the source for downstream waters. Need to continue advancing sci & mgmt of these systems! www.nature.com/articles/s44...

nature.com

Advancing the science of headwater streamflow for global water protection - Nature Water

Despite their substantial contributions to watershed resilience, headwater streams are becoming increasingly imperilled. This Perspective summarizes the status of headwater streamflow information and ...

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Reposted by David Olefeldt

Dr. Rebecca Barnes (she/her) @waterbarnes.bsky.social · 04/01/2025

Mark your calendars for the 3rd Thurs of each month 11 am ET for #Women Advancing #River #Research talks 🧪💧🧑‍🔬 🔗register here www.cee.psu.edu/events/women...

Social media card with the schedule for the 2025 Women Advancing River Research lecture series, https://www.cee.psu.edu/events/women-advancing-river-research.aspx

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Peter Griffith @carboncyclist.org · 13/12/2024

Are you a writer, musician, artist, or other creator who wants to work with #NASA scientists? This is a great opportunity. stemgateway.nasa.gov/s/course-off...

stemgateway.nasa.gov

Learner Community

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David Olefeldt @olefeldt.bsky.social · 13/12/2024

I'll be dammed! Next week Jessica Lagroix will present her MSc thesis on the influence of beaver ponds on water chemistry on the Taiga Plains, focusing on methylmercury. Two years of sampling, bushwacking to access sites and avoiding wildfires, but results are really cool TBA! #FieldworkFriday

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David Olefeldt @olefeldt.bsky.social · 11/12/2024

Well done Edmonton - 7.30 am and last night's snow has been cleared from the bike path. Much appreciated!

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Dr. Merritt Rae Turetsky @queenofpeat.bsky.social · 10/12/2024

I presented my #AGU24 talk this morning and wanted to summarize my take homes. 20 yrs ago I created the Alaska Peatland Experiment (APEX) to experimentally push hydrology into wetter and drier modes. CO2 emissions are remarkable stable while CH4 is very high with flooding. 1/

Image of the Alaska Peatland Experiment fen.

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Gerard Rocher-Ros @grocherros.bsky.social · 08/12/2024

I am soon recruiting two PhDs and a postdoc, to work on carbon, methane, metabolism in arctic stream networks. Glad to chat potential opportunities during #AGU24 @agu.org ! There is also soon another postdoc position on oxygen responses to peatland restoration with @ryansponseller.bsky.social ⬇️

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David Olefeldt @olefeldt.bsky.social · 07/12/2024

New truck for the CAWS research group - last truck lasted 7 years and we put 350,000 km on it. Will this one go further? What podcasts will be popular? Who will get it stuck on a muddy road? Also - infrastructure grants are slow, I budgeted for this truck in 2019 so needless to say I blew my budget!

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David Olefeldt @olefeldt.bsky.social · 04/12/2024

Very nice review - a must read for students working on understanding temporal patterns in river water chemistry! Cheers

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