Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity
1. The polar desert biome of the Canadian high Arctic Archipelago is currently experiencing some of the greatest mean annual air temperature increases on the planet, threatening the stability of ecosystems residing above temperature-sensitive permafrost. 2. Ice wedges are the most widespread form of...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:91213 2023-07-02T03:30:55+02:00 Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity Becker, Michael S. Davies, T. Jonathan Pollard, Wayne H 2015-10-21T19:58:48.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-ji-0p5q https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:91213 unknown doi:10.5061/dryad.5n628/1 doi:10.5061/dryad.5n628/2 doi:10.5061/dryad.5n628/3 doi:10.1111/1365-2745.12491 http://nbn-resolving.org/urn:nbn:nl:ui:13-ji-0p5q doi:10.5061/dryad.5n628 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:91213 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2015 ftdans https://doi.org/10.5061/dryad.5n628/110.5061/dryad.5n628/210.5061/dryad.5n628/310.1111/1365-2745.1249110.5061/dryad.5n628 2023-06-13T13:20:25Z 1. The polar desert biome of the Canadian high Arctic Archipelago is currently experiencing some of the greatest mean annual air temperature increases on the planet, threatening the stability of ecosystems residing above temperature-sensitive permafrost. 2. Ice wedges are the most widespread form of ground ice, occurring in up to 25% of the world's terrestrial near-surface, and their melting (thermokarst) may catalyze a suite of biotic and ecological changes, facilitating major ecosystem shifts. 3. These unknown ecosystem shifts raise serious questions as to how permafrost stability, vegetation diversity, and edaphic conditions will change with a warming high Arctic. Ecosystem and thermokarst processes tend to be examined independently, limiting our understanding of a coupled system whereby the effect of climate change on one will affect the outcome of the other. 4. Using in-depth, comprehensive field observations and a space-for-time approach, we investigate the highly structured landscape that has emerged due to the thermokarst-induced partitioning of microhabitats. We examine differences in vegetation diversity, community composition, and soil conditions on the Fosheim Peninsula, Ellesmere Island, Nunavut. We hypothesize that: (i) greater ice wedge subsidence results in increased vegetation cover due to elevated soil moisture, thereby decreasing the seasonal depth of thaw and restricting groundwater outflow; (ii) thermokarst processes result in altered vegetation richness, turnover, and dispersion, with greater microhabitat diversity at the landscape scale; (iii) shifts in hydrology and plant community structure alter soil chemistry. 5. We found that the disturbance caused by melting ice wedges catalyzes a suite of environmental and biotic effects: topographical changes, a new hydrological balance, significant species richness and turnover changes, and distinct soil chemistries. Thermokarst areas favour a subset of species unique from the polar desert and are characterized by greater species turnover ... Other/Unknown Material Arctic Archipelago Arctic Climate change Ellesmere Island Fosheim Peninsula Ice Nunavut permafrost polar desert Thermokarst wedge* Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Arctic Ellesmere Island Fosheim Peninsula ENVELOPE(-83.749,-83.749,79.669,79.669) Nunavut |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
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Life sciences medicine and health care |
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Life sciences medicine and health care Becker, Michael S. Davies, T. Jonathan Pollard, Wayne H Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
topic_facet |
Life sciences medicine and health care |
description |
1. The polar desert biome of the Canadian high Arctic Archipelago is currently experiencing some of the greatest mean annual air temperature increases on the planet, threatening the stability of ecosystems residing above temperature-sensitive permafrost. 2. Ice wedges are the most widespread form of ground ice, occurring in up to 25% of the world's terrestrial near-surface, and their melting (thermokarst) may catalyze a suite of biotic and ecological changes, facilitating major ecosystem shifts. 3. These unknown ecosystem shifts raise serious questions as to how permafrost stability, vegetation diversity, and edaphic conditions will change with a warming high Arctic. Ecosystem and thermokarst processes tend to be examined independently, limiting our understanding of a coupled system whereby the effect of climate change on one will affect the outcome of the other. 4. Using in-depth, comprehensive field observations and a space-for-time approach, we investigate the highly structured landscape that has emerged due to the thermokarst-induced partitioning of microhabitats. We examine differences in vegetation diversity, community composition, and soil conditions on the Fosheim Peninsula, Ellesmere Island, Nunavut. We hypothesize that: (i) greater ice wedge subsidence results in increased vegetation cover due to elevated soil moisture, thereby decreasing the seasonal depth of thaw and restricting groundwater outflow; (ii) thermokarst processes result in altered vegetation richness, turnover, and dispersion, with greater microhabitat diversity at the landscape scale; (iii) shifts in hydrology and plant community structure alter soil chemistry. 5. We found that the disturbance caused by melting ice wedges catalyzes a suite of environmental and biotic effects: topographical changes, a new hydrological balance, significant species richness and turnover changes, and distinct soil chemistries. Thermokarst areas favour a subset of species unique from the polar desert and are characterized by greater species turnover ... |
author |
Becker, Michael S. Davies, T. Jonathan Pollard, Wayne H |
author_facet |
Becker, Michael S. Davies, T. Jonathan Pollard, Wayne H |
author_sort |
Becker, Michael S. |
title |
Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
title_short |
Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
title_full |
Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
title_fullStr |
Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
title_full_unstemmed |
Data from: Ground ice melt in the high Arctic leads to greater ecological heterogeneity |
title_sort |
data from: ground ice melt in the high arctic leads to greater ecological heterogeneity |
publishDate |
2015 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-ji-0p5q https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:91213 |
long_lat |
ENVELOPE(-83.749,-83.749,79.669,79.669) |
geographic |
Arctic Ellesmere Island Fosheim Peninsula Nunavut |
geographic_facet |
Arctic Ellesmere Island Fosheim Peninsula Nunavut |
genre |
Arctic Archipelago Arctic Climate change Ellesmere Island Fosheim Peninsula Ice Nunavut permafrost polar desert Thermokarst wedge* |
genre_facet |
Arctic Archipelago Arctic Climate change Ellesmere Island Fosheim Peninsula Ice Nunavut permafrost polar desert Thermokarst wedge* |
op_relation |
doi:10.5061/dryad.5n628/1 doi:10.5061/dryad.5n628/2 doi:10.5061/dryad.5n628/3 doi:10.1111/1365-2745.12491 http://nbn-resolving.org/urn:nbn:nl:ui:13-ji-0p5q doi:10.5061/dryad.5n628 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:91213 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.5n628/110.5061/dryad.5n628/210.5061/dryad.5n628/310.1111/1365-2745.1249110.5061/dryad.5n628 |
_version_ |
1770275185653448704 |