Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland
Evergreen dwarf shrubs respond swiftly to warming in the cool and dry High Arctic, but their response in the warmer Low Arctic, where they are expected to be outcompeted by taller species under future warming, remains to be clarified. Here, 12,528 annual growth increments, covering 122 years (1893-2...
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ftzenodo:oai:zenodo.org:7153512 2024-09-15T18:01:47+00:00 Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland Weijers, Stef 2022-10-06 https://doi.org/10.5061/dryad.rbnzs7hf4 unknown Zenodo https://doi.org/10.22541/au.164395278.85793360/v1 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.rbnzs7hf4 oai:zenodo.org:7153512 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Arctic Ecology shrubs dwarf shrub Cassiope tetragona shoot length growth dendro-ecology ring width info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5061/dryad.rbnzs7hf410.22541/au.164395278.85793360/v1 2024-07-26T02:37:46Z Evergreen dwarf shrubs respond swiftly to warming in the cool and dry High Arctic, but their response in the warmer Low Arctic, where they are expected to be outcompeted by taller species under future warming, remains to be clarified. Here, 12,528 annual growth increments, covering 122 years (1893-2014), were measured of 764 branches from 25 individuals of the evergreen dwarf shrub Cassiope tetragona from a Low-Arctic erect dwarf-shrub tundra site in western Greenland. In addition, branch initiation and mortality frequency time series were developed. The influence of seasonal climate and correspondence with fluctuations in regional normalized difference vegetation index (NDVI), a satellite proxy for vegetation productivity, were studied. Summer temperatures were the main driver of growth, while winter temperatures were the main non-summer-climate driver. During past and recent warm episodes, shrub growth diverged from summer temperatures. In recent decades, early summer precipitation has become the main growth-limiting factor for some individuals, likely through micro-topography-determined soil moisture availability, and more than half of the shrubs studied became irresponsive to summer temperatures. There was correspondence between climatic drivers, C. tetragona growth and branch initiation frequency, and satellite-observed vegetation productivity, suggesting the area's shrub-dominated tundra vegetation is limited by similar climatic factors. Winter warming events were likely the predominant cause of branch mortality, while branching increased after years of poor growth and cooler-than-average summers. Synthesis : These findings show that the erect dwarf-shrub tundra in the Low Arctic has already and will likely become decreasingly temperature- and increasingly moisture-limited and that winter warming supports shrub growth, but increased extreme winter warming event frequency may increase branch mortality and vegetation damage. Such counter-acting mechanisms could offer an explanation for the vegetation ... Other/Unknown Material Cassiope tetragona Greenland Tundra Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Arctic Ecology shrubs dwarf shrub Cassiope tetragona shoot length growth dendro-ecology ring width |
spellingShingle |
Arctic Ecology shrubs dwarf shrub Cassiope tetragona shoot length growth dendro-ecology ring width Weijers, Stef Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
topic_facet |
Arctic Ecology shrubs dwarf shrub Cassiope tetragona shoot length growth dendro-ecology ring width |
description |
Evergreen dwarf shrubs respond swiftly to warming in the cool and dry High Arctic, but their response in the warmer Low Arctic, where they are expected to be outcompeted by taller species under future warming, remains to be clarified. Here, 12,528 annual growth increments, covering 122 years (1893-2014), were measured of 764 branches from 25 individuals of the evergreen dwarf shrub Cassiope tetragona from a Low-Arctic erect dwarf-shrub tundra site in western Greenland. In addition, branch initiation and mortality frequency time series were developed. The influence of seasonal climate and correspondence with fluctuations in regional normalized difference vegetation index (NDVI), a satellite proxy for vegetation productivity, were studied. Summer temperatures were the main driver of growth, while winter temperatures were the main non-summer-climate driver. During past and recent warm episodes, shrub growth diverged from summer temperatures. In recent decades, early summer precipitation has become the main growth-limiting factor for some individuals, likely through micro-topography-determined soil moisture availability, and more than half of the shrubs studied became irresponsive to summer temperatures. There was correspondence between climatic drivers, C. tetragona growth and branch initiation frequency, and satellite-observed vegetation productivity, suggesting the area's shrub-dominated tundra vegetation is limited by similar climatic factors. Winter warming events were likely the predominant cause of branch mortality, while branching increased after years of poor growth and cooler-than-average summers. Synthesis : These findings show that the erect dwarf-shrub tundra in the Low Arctic has already and will likely become decreasingly temperature- and increasingly moisture-limited and that winter warming supports shrub growth, but increased extreme winter warming event frequency may increase branch mortality and vegetation damage. Such counter-acting mechanisms could offer an explanation for the vegetation ... |
format |
Other/Unknown Material |
author |
Weijers, Stef |
author_facet |
Weijers, Stef |
author_sort |
Weijers, Stef |
title |
Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
title_short |
Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
title_full |
Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
title_fullStr |
Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
title_full_unstemmed |
Data from: Declining temperature and increasing moisture sensitivity of shrub growth in the Low-Arctic erect dwarf-shrub tundra of western Greenland |
title_sort |
data from: declining temperature and increasing moisture sensitivity of shrub growth in the low-arctic erect dwarf-shrub tundra of western greenland |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5061/dryad.rbnzs7hf4 |
genre |
Cassiope tetragona Greenland Tundra |
genre_facet |
Cassiope tetragona Greenland Tundra |
op_relation |
https://doi.org/10.22541/au.164395278.85793360/v1 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.rbnzs7hf4 oai:zenodo.org:7153512 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.rbnzs7hf410.22541/au.164395278.85793360/v1 |
_version_ |
1810438857841180672 |