Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems.
The Arctic is a water-rich region, with freshwater systems covering about 16% of the northern permafrost landscape. Permafrost thaw creates new freshwater ecosystems, while at the same time modifying the existing lakes, streams, and rivers that are impacted by thaw. Here, we describe the current sta...
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ftinrsquebec:oai:espace.inrs.ca:3952 2023-05-15T14:27:53+02:00 Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. Vonk, Jorien E. Tank, Suzanne E. Bowden, William B. Laurion, Isabelle Vincent, Warwick Alekseychik, Pavel Amyot, Marc Billett, Michael F. Canário, João Cory, Rose M. Deshpande, Bethany N. Helbig, Manuel Jammet, Mathilde Karlsson, Jan Larouche, Julia R. MacMillan, Gwyneth A. Rautio, Milla Anthony, Katey Walter Wickland, Kimberly P. 2015 application/pdf https://espace.inrs.ca/id/eprint/3952/ https://espace.inrs.ca/id/eprint/3952/1/P2736.pdf https://doi.org/10.5194/bg-12-7129-2015 en eng https://espace.inrs.ca/id/eprint/3952/1/P2736.pdf Vonk, Jorien E., Tank, Suzanne E., Bowden, William B., Laurion, Isabelle, Vincent, Warwick, Alekseychik, Pavel, Amyot, Marc, Billett, Michael F., Canário, João, Cory, Rose M., Deshpande, Bethany N., Helbig, Manuel, Jammet, Mathilde, Karlsson, Jan, Larouche, Julia R., MacMillan, Gwyneth A., Rautio, Milla, Anthony, Katey Walter et Wickland, Kimberly P. (2015). Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. Biogeosciences , vol. 12 , nº 23. p. 7129-7167. DOI:10.5194/bg-12-7129-2015 <https://doi.org/10.5194/bg-12-7129-2015>. doi:10.5194/bg-12-7129-2015 freeze-thaw cycle freshwater ecosystem greenhouse gas ice core organic matter permafrost thawing Article Évalué par les pairs 2015 ftinrsquebec https://doi.org/10.5194/bg-12-7129-2015 2023-02-10T11:42:46Z The Arctic is a water-rich region, with freshwater systems covering about 16% of the northern permafrost landscape. Permafrost thaw creates new freshwater ecosystems, while at the same time modifying the existing lakes, streams, and rivers that are impacted by thaw. Here, we describe the current state of knowledge regarding how permafrost thaw affects lentic (still) and lotic (moving) systems, exploring the effects of both thermokarst (thawing and collapse of ice-rich permafrost) and deepening of the active layer (the surface soil layer that thaws and refreezes each year). Within thermokarst, we further differentiate between the effects of thermokarst in lowland areas vs. that on hillslopes. For almost all of the processes that we explore, the effects of thaw vary regionally, and between lake and stream systems. Much of this regional variation is caused by differences in ground ice content, topography, soil type, and permafrost coverage. Together, these modifying factors determine (i) the degree to which permafrost thaw manifests as thermokarst, (ii) whether thermokarst leads to slumping or the formation of thermokarst lakes, and (iii) the manner in which constituent delivery to freshwater systems is altered by thaw. Differences in thaw-enabled constituent delivery can be considerable, with these modifying factors determining, for example, the balance between delivery of particulate vs. dissolved constituents, and inorganic vs. organic materials. Changes in the composition of thaw-impacted waters, coupled with changes in lake morphology, can strongly affect the physical and optical properties of thermokarst lakes. The ecology of thaw-impacted lakes and streams is also likely to change; these systems have unique microbiological communities, and show differences in respiration, primary production, and food web structure that are largely driven by differences in sediment, dissolved organic matter, and nutrient delivery. The degree to which thaw enables the delivery of dissolved vs. particulate organic matter, ... Article in Journal/Newspaper Arctic Arctic Ice ice core permafrost Thermokarst Institut national de la recherche scientifique, Québec: Espace INRS Arctic Biogeosciences 12 23 7129 7167 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
freeze-thaw cycle freshwater ecosystem greenhouse gas ice core organic matter permafrost thawing |
spellingShingle |
freeze-thaw cycle freshwater ecosystem greenhouse gas ice core organic matter permafrost thawing Vonk, Jorien E. Tank, Suzanne E. Bowden, William B. Laurion, Isabelle Vincent, Warwick Alekseychik, Pavel Amyot, Marc Billett, Michael F. Canário, João Cory, Rose M. Deshpande, Bethany N. Helbig, Manuel Jammet, Mathilde Karlsson, Jan Larouche, Julia R. MacMillan, Gwyneth A. Rautio, Milla Anthony, Katey Walter Wickland, Kimberly P. Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
topic_facet |
freeze-thaw cycle freshwater ecosystem greenhouse gas ice core organic matter permafrost thawing |
description |
The Arctic is a water-rich region, with freshwater systems covering about 16% of the northern permafrost landscape. Permafrost thaw creates new freshwater ecosystems, while at the same time modifying the existing lakes, streams, and rivers that are impacted by thaw. Here, we describe the current state of knowledge regarding how permafrost thaw affects lentic (still) and lotic (moving) systems, exploring the effects of both thermokarst (thawing and collapse of ice-rich permafrost) and deepening of the active layer (the surface soil layer that thaws and refreezes each year). Within thermokarst, we further differentiate between the effects of thermokarst in lowland areas vs. that on hillslopes. For almost all of the processes that we explore, the effects of thaw vary regionally, and between lake and stream systems. Much of this regional variation is caused by differences in ground ice content, topography, soil type, and permafrost coverage. Together, these modifying factors determine (i) the degree to which permafrost thaw manifests as thermokarst, (ii) whether thermokarst leads to slumping or the formation of thermokarst lakes, and (iii) the manner in which constituent delivery to freshwater systems is altered by thaw. Differences in thaw-enabled constituent delivery can be considerable, with these modifying factors determining, for example, the balance between delivery of particulate vs. dissolved constituents, and inorganic vs. organic materials. Changes in the composition of thaw-impacted waters, coupled with changes in lake morphology, can strongly affect the physical and optical properties of thermokarst lakes. The ecology of thaw-impacted lakes and streams is also likely to change; these systems have unique microbiological communities, and show differences in respiration, primary production, and food web structure that are largely driven by differences in sediment, dissolved organic matter, and nutrient delivery. The degree to which thaw enables the delivery of dissolved vs. particulate organic matter, ... |
format |
Article in Journal/Newspaper |
author |
Vonk, Jorien E. Tank, Suzanne E. Bowden, William B. Laurion, Isabelle Vincent, Warwick Alekseychik, Pavel Amyot, Marc Billett, Michael F. Canário, João Cory, Rose M. Deshpande, Bethany N. Helbig, Manuel Jammet, Mathilde Karlsson, Jan Larouche, Julia R. MacMillan, Gwyneth A. Rautio, Milla Anthony, Katey Walter Wickland, Kimberly P. |
author_facet |
Vonk, Jorien E. Tank, Suzanne E. Bowden, William B. Laurion, Isabelle Vincent, Warwick Alekseychik, Pavel Amyot, Marc Billett, Michael F. Canário, João Cory, Rose M. Deshpande, Bethany N. Helbig, Manuel Jammet, Mathilde Karlsson, Jan Larouche, Julia R. MacMillan, Gwyneth A. Rautio, Milla Anthony, Katey Walter Wickland, Kimberly P. |
author_sort |
Vonk, Jorien E. |
title |
Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
title_short |
Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
title_full |
Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
title_fullStr |
Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
title_full_unstemmed |
Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. |
title_sort |
reviews and syntheses: effects of permafrost thaw on arctic aquatic ecosystems. |
publishDate |
2015 |
url |
https://espace.inrs.ca/id/eprint/3952/ https://espace.inrs.ca/id/eprint/3952/1/P2736.pdf https://doi.org/10.5194/bg-12-7129-2015 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Ice ice core permafrost Thermokarst |
genre_facet |
Arctic Arctic Ice ice core permafrost Thermokarst |
op_relation |
https://espace.inrs.ca/id/eprint/3952/1/P2736.pdf Vonk, Jorien E., Tank, Suzanne E., Bowden, William B., Laurion, Isabelle, Vincent, Warwick, Alekseychik, Pavel, Amyot, Marc, Billett, Michael F., Canário, João, Cory, Rose M., Deshpande, Bethany N., Helbig, Manuel, Jammet, Mathilde, Karlsson, Jan, Larouche, Julia R., MacMillan, Gwyneth A., Rautio, Milla, Anthony, Katey Walter et Wickland, Kimberly P. (2015). Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems. Biogeosciences , vol. 12 , nº 23. p. 7129-7167. DOI:10.5194/bg-12-7129-2015 <https://doi.org/10.5194/bg-12-7129-2015>. doi:10.5194/bg-12-7129-2015 |
op_doi |
https://doi.org/10.5194/bg-12-7129-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
23 |
container_start_page |
7129 |
op_container_end_page |
7167 |
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1766301950614175744 |