From Arctic ponds to the “Northern Great Lakes” : algae as first responders of climate-driven regime shifts
From Arctic ponds to the “Northern Great Lakes” : algae as first responders of climate-driven regime shifts
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- dc.contributor.author
- Smol, John P.
- Rühland, Kathleen M.
- Michelutti, Neal
- Evans, Marlene S.
- dc.date.accepted
- 2024-08-06
- dc.date.accessioned
- 2024-09-03T19:44:15Z
- dc.date.available
- 2024-09-03T19:44:15Z
- dc.date.issued
- 2024-08-30
- dc.date.submitted
- 2024-06-27
- dc.description.abstract - en
- Arctic freshwater ecosystems are on the “frontline” of climate change, but due to a lack of direct long-term monitoring data, indirect approaches, such as algal-based paleolimnology, must be used to reconstruct past limnological conditions. Our understanding of the responses of small- to mid-sized Arctic lakes to climate warming has increased over the last ~30 years. However, until recently, little was known about even the basic limnological conditions of Canada's “Northern Great Lakes,” such as Lake Hazen, Great Bear Lake, and Great Slave Lake. In this summary, we show that a continuum of algal changes, observable in the sedimentary archives of shallow ponds to very large Arctic lakes, signals the crossing of key aquatic thresholds linked to changing ice covers and thermal regimes, declining wind speeds, and other climate-related variables. With recent accelerated warming, even the largest and most resilient Arctic waterbodies are now fundamentally different than they were just a few decades ago. These changes will undoubtedly cascade throughout the food web leading to important changes for local Indigenous populations as well as the global community.
- dc.description.plainlanguage - en
- Our paleolimnology study of three of Canada’s “Northern Great Lakes,” i.e., Lake Hazen, Great Bear Lake, and Great Slave Lake and the impacts of changing thermal regimes, declining wind speeds, etc., on diatom communities showed similar findings as for small lakes. With recent accelerated warming, even the largest and most resilient Arctic waterbodies are now fundamentally different than they were just a few decades ago. These impacts should cascade throughout the food web affecting local communities.
- dc.description.plainlanguage - fr
- Notre étude paléolimnologique de trois des « Grands lacs du Nord » du Canada, à savoir le lac Hazen, le Grand lac de l’Ours et le Grand lac des Esclaves, et de l’impact de l’évolution des régimes thermiques, de la diminution de la vitesse des vents, etc., sur les communautés de diatomées a abouti à des résultats similaires à ceux obtenus pour les petits lacs. Avec l’accélération récente du réchauffement, même les masses d’eau arctiques les plus grandes et les plus résistantes sont aujourd’hui fondamentalement différentes de ce qu’elles étaient il y a seulement quelques décennies. Ces effets devraient se répercuter sur l’ensemble du réseau trophique, et affecter les communautés locales.
- dc.identifier.doi
- https://doi.org/10.1111/jpy.13494
- dc.identifier.issn
- 1529-8817
- 0022-3646
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/2914
- dc.language.iso
- en
- dc.publisher
- Wiley
- dc.rights - en
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights - fr
- Creative Commons Attribution 4.0 International (CC BY 4.0)
- dc.rights.openaccesslevel - en
- Gold
- dc.rights.openaccesslevel - fr
- Or
- dc.rights.uri - en
- https://creativecommons.org/licenses/by/4.0/
- dc.rights.uri - fr
- https://creativecommons.org/licenses/by/4.0/deed.fr
- dc.subject - en
- Nature and environment
- Science and technology
- dc.subject - fr
- Nature et environnement
- Sciences et technologie
- dc.subject.en - en
- Nature and environment
- Science and technology
- dc.subject.fr - fr
- Nature et environnement
- Sciences et technologie
- dc.title - en
- From Arctic ponds to the “Northern Great Lakes” : algae as first responders of climate-driven regime shifts
- dc.title.alternative - fr
- Des étangs de l’Arctique aux « Grands Lacs du Nord » : Les algues, premières à répondre aux changements de régime induits par le climat
- dc.type - en
- Article
- dc.type - fr
- Article
- local.article.journaltitle
- Journal of Phycology
- local.pagination
- 7 pages
- local.peerreview - en
- Yes
- local.peerreview - fr
- Oui
- local.requestdoi
- No
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