Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra
Thermokarst features, such as thaw ponds, are hotspots for methane emissions in warming lowland tundra. Presently we lack quantitative knowledge on the formation rates of formation of thaw ponds and subsequent vegetation succession, necessary to determine their net contribution to greenhouse gas emi...
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2020
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Online Access: | https://doi.org/10.17026/dans-29c-tdq5 https://nbn-resolving.org/urn:nbn:nl:ui:13-un-zneg |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::a7d248662881bc0d76af0b956061083a 2023-05-15T14:55:35+02:00 Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra Magnusson, R.I. (Plant Ecology & Nature Conservation - Wageningen University & Research) Plant Ecology & Nature Conservation-Wageningen University & Research Plant Ecology & Nature Conservation - Wageningen University & Research 2020-01-01 https://doi.org/10.17026/dans-29c-tdq5 https://nbn-resolving.org/urn:nbn:nl:ui:13-un-zneg en eng http://dx.doi.org/10.17026/dans-29c-tdq5 https://dx.doi.org/10.17026/dans-29c-tdq5 http://dx.doi.org/https://doi.org/10.17026/dans-29c-tdq5 https://nbn-resolving.org/urn:nbn:nl:ui:13-un-zneg lic_creative-commons oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:156084 10.17026/dans-29c-tdq5 oai:easy.dans.knaw.nl:easy-dataset:156084 603fb235-92d6-4da8-be65-a38a175c6ca2 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::2559b4dd27ae4bc6c7f3727ec863444f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|re3data_____::730f562f9efe8a3b3742d2da510d4335 thermokarst tundra arctic siberia thaw pond vegetation succession Temporal coverage: 2010-2019 Nature and landscape Various geo envir Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2020 fttriple https://doi.org/10.17026/dans-29c-tdq5 2023-01-22T16:53:11Z Thermokarst features, such as thaw ponds, are hotspots for methane emissions in warming lowland tundra. Presently we lack quantitative knowledge on the formation rates of formation of thaw ponds and subsequent vegetation succession, necessary to determine their net contribution to greenhouse gas emissions. This study set out to identify development trajectories and formation rates approximate rates of of small-scale (< 1 km2) arctic thaw ponds in north-eastern Siberia. We selected 40 ponds of different age classes based on a time-series of satellite images and measured vegetation composition, microtopography, water table and active layer thicknessthaw depth in the field and measured age of recruiting colonizing shrubs in thaw ponds using dendrochronology. We found that young thaw ponds are characterised by dead shrubs, while older ponds show rapid paludification through colonization bycontain mostly sedges and Sphagnum moss. While dead shrubs and open water are associated with permafrost degradation (lower surface elevation, high active layer thicknesslarger thaw depth), sites with sedge and in particular Sphagnum display indications of permafrost recovery. Recruitment of Betula nana on Sphagnum carpets in ponds indicates a potential recovery towards shrub dominated vegetation, although it remains unclear if and on what timescale this occurs. Our results suggest that thaw ponds display potentially cyclic vegetation succession associated with permafrost degradation and recovery. Thaw pond formation and initial colonization by sedges can occur on subdecadal timescales, which is relatively fast compared to rates known for ice wedge degradation (subdecadal to century-scale). The rates of formation and recovery of small-scale thaw ponds have implications for the greening/browning dynamics and carbon balance of this ecosystem. Dataset Arctic Betula nana Ice permafrost Thermokarst Tundra wedge* Siberia Unknown Arctic Browning ENVELOPE(164.050,164.050,-74.617,-74.617) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
thermokarst tundra arctic siberia thaw pond vegetation succession Temporal coverage: 2010-2019 Nature and landscape Various geo envir |
spellingShingle |
thermokarst tundra arctic siberia thaw pond vegetation succession Temporal coverage: 2010-2019 Nature and landscape Various geo envir Magnusson, R.I. (Plant Ecology & Nature Conservation - Wageningen University & Research) Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
topic_facet |
thermokarst tundra arctic siberia thaw pond vegetation succession Temporal coverage: 2010-2019 Nature and landscape Various geo envir |
description |
Thermokarst features, such as thaw ponds, are hotspots for methane emissions in warming lowland tundra. Presently we lack quantitative knowledge on the formation rates of formation of thaw ponds and subsequent vegetation succession, necessary to determine their net contribution to greenhouse gas emissions. This study set out to identify development trajectories and formation rates approximate rates of of small-scale (< 1 km2) arctic thaw ponds in north-eastern Siberia. We selected 40 ponds of different age classes based on a time-series of satellite images and measured vegetation composition, microtopography, water table and active layer thicknessthaw depth in the field and measured age of recruiting colonizing shrubs in thaw ponds using dendrochronology. We found that young thaw ponds are characterised by dead shrubs, while older ponds show rapid paludification through colonization bycontain mostly sedges and Sphagnum moss. While dead shrubs and open water are associated with permafrost degradation (lower surface elevation, high active layer thicknesslarger thaw depth), sites with sedge and in particular Sphagnum display indications of permafrost recovery. Recruitment of Betula nana on Sphagnum carpets in ponds indicates a potential recovery towards shrub dominated vegetation, although it remains unclear if and on what timescale this occurs. Our results suggest that thaw ponds display potentially cyclic vegetation succession associated with permafrost degradation and recovery. Thaw pond formation and initial colonization by sedges can occur on subdecadal timescales, which is relatively fast compared to rates known for ice wedge degradation (subdecadal to century-scale). The rates of formation and recovery of small-scale thaw ponds have implications for the greening/browning dynamics and carbon balance of this ecosystem. |
author2 |
Plant Ecology & Nature Conservation-Wageningen University & Research Plant Ecology & Nature Conservation - Wageningen University & Research |
format |
Dataset |
author |
Magnusson, R.I. (Plant Ecology & Nature Conservation - Wageningen University & Research) |
author_facet |
Magnusson, R.I. (Plant Ecology & Nature Conservation - Wageningen University & Research) |
author_sort |
Magnusson, R.I. (Plant Ecology & Nature Conservation - Wageningen University & Research) |
title |
Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
title_short |
Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
title_full |
Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
title_fullStr |
Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
title_full_unstemmed |
Rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the Siberian lowland tundra |
title_sort |
rapid vegetation succession and coupled permafrost dynamics in arctic thaw ponds in the siberian lowland tundra |
publishDate |
2020 |
url |
https://doi.org/10.17026/dans-29c-tdq5 https://nbn-resolving.org/urn:nbn:nl:ui:13-un-zneg |
long_lat |
ENVELOPE(164.050,164.050,-74.617,-74.617) |
geographic |
Arctic Browning |
geographic_facet |
Arctic Browning |
genre |
Arctic Betula nana Ice permafrost Thermokarst Tundra wedge* Siberia |
genre_facet |
Arctic Betula nana Ice permafrost Thermokarst Tundra wedge* Siberia |
op_source |
oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:156084 10.17026/dans-29c-tdq5 oai:easy.dans.knaw.nl:easy-dataset:156084 603fb235-92d6-4da8-be65-a38a175c6ca2 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::2559b4dd27ae4bc6c7f3727ec863444f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|re3data_____::730f562f9efe8a3b3742d2da510d4335 |
op_relation |
http://dx.doi.org/10.17026/dans-29c-tdq5 https://dx.doi.org/10.17026/dans-29c-tdq5 http://dx.doi.org/https://doi.org/10.17026/dans-29c-tdq5 https://nbn-resolving.org/urn:nbn:nl:ui:13-un-zneg |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.17026/dans-29c-tdq5 |
_version_ |
1766327607359438848 |