Divergence of Arctic shrub growth associated with sea ice decline.
Arctic sea ice extent (SIE) is declining at an accelerating rate with a wide range of ecological consequences. However, determining sea ice effects on tundra vegetation remains a challenge. In this study, we examined the universality or lack thereof in tundra shrub growth responses to changes in SIE...
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ftcdlib:oai:escholarship.org/ark:/13030/qt7770x8b8 2023-05-15T14:36:25+02:00 Divergence of Arctic shrub growth associated with sea ice decline. Buchwal, Agata Sullivan, Patrick F Macias-Fauria, Marc Post, Eric Myers-Smith, Isla H Stroeve, Julienne C Blok, Daan Tape, Ken D Forbes, Bruce C Ropars, Pascale Lévesque, Esther Elberling, Bo Angers-Blondin, Sandra Boyle, Joseph S Boudreau, Stéphane Boulanger-Lapointe, Noémie Gamm, Cassandra Hallinger, Martin Rachlewicz, Grzegorz Young, Amanda Zetterberg, Pentti Welker, Jeffrey M 33334 - 33344 2020-12-14 application/pdf https://escholarship.org/uc/item/7770x8b8 unknown eScholarship, University of California qt7770x8b8 https://escholarship.org/uc/item/7770x8b8 public Proceedings of the National Academy of Sciences of the United States of America, vol 117, iss 52 Arctic divergence sea ice shrub rings tundra shrubs article 2020 ftcdlib 2021-02-18T15:15:20Z Arctic sea ice extent (SIE) is declining at an accelerating rate with a wide range of ecological consequences. However, determining sea ice effects on tundra vegetation remains a challenge. In this study, we examined the universality or lack thereof in tundra shrub growth responses to changes in SIE and summer climate across the Pan-Arctic, taking advantage of 23 tundra shrub-ring chronologies from 19 widely distributed sites (56°N to 83°N). We show a clear divergence in shrub growth responses to SIE that began in the mid-1990s, with 39% of the chronologies showing declines and 57% showing increases in radial growth (decreasers and increasers, respectively). Structural equation models revealed that declining SIE was associated with rising air temperature and precipitation for increasers and with increasingly dry conditions for decreasers. Decreasers tended to be from areas of the Arctic with lower summer precipitation and their growth decline was related to decreases in the standardized precipitation evapotranspiration index. Our findings suggest that moisture limitation, associated with declining SIE, might inhibit the positive effects of warming on shrub growth over a considerable part of the terrestrial Arctic, thereby complicating predictions of vegetation change and future tundra productivity. Article in Journal/Newspaper Arctic Sea ice Tundra University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Arctic divergence sea ice shrub rings tundra shrubs |
spellingShingle |
Arctic divergence sea ice shrub rings tundra shrubs Buchwal, Agata Sullivan, Patrick F Macias-Fauria, Marc Post, Eric Myers-Smith, Isla H Stroeve, Julienne C Blok, Daan Tape, Ken D Forbes, Bruce C Ropars, Pascale Lévesque, Esther Elberling, Bo Angers-Blondin, Sandra Boyle, Joseph S Boudreau, Stéphane Boulanger-Lapointe, Noémie Gamm, Cassandra Hallinger, Martin Rachlewicz, Grzegorz Young, Amanda Zetterberg, Pentti Welker, Jeffrey M Divergence of Arctic shrub growth associated with sea ice decline. |
topic_facet |
Arctic divergence sea ice shrub rings tundra shrubs |
description |
Arctic sea ice extent (SIE) is declining at an accelerating rate with a wide range of ecological consequences. However, determining sea ice effects on tundra vegetation remains a challenge. In this study, we examined the universality or lack thereof in tundra shrub growth responses to changes in SIE and summer climate across the Pan-Arctic, taking advantage of 23 tundra shrub-ring chronologies from 19 widely distributed sites (56°N to 83°N). We show a clear divergence in shrub growth responses to SIE that began in the mid-1990s, with 39% of the chronologies showing declines and 57% showing increases in radial growth (decreasers and increasers, respectively). Structural equation models revealed that declining SIE was associated with rising air temperature and precipitation for increasers and with increasingly dry conditions for decreasers. Decreasers tended to be from areas of the Arctic with lower summer precipitation and their growth decline was related to decreases in the standardized precipitation evapotranspiration index. Our findings suggest that moisture limitation, associated with declining SIE, might inhibit the positive effects of warming on shrub growth over a considerable part of the terrestrial Arctic, thereby complicating predictions of vegetation change and future tundra productivity. |
format |
Article in Journal/Newspaper |
author |
Buchwal, Agata Sullivan, Patrick F Macias-Fauria, Marc Post, Eric Myers-Smith, Isla H Stroeve, Julienne C Blok, Daan Tape, Ken D Forbes, Bruce C Ropars, Pascale Lévesque, Esther Elberling, Bo Angers-Blondin, Sandra Boyle, Joseph S Boudreau, Stéphane Boulanger-Lapointe, Noémie Gamm, Cassandra Hallinger, Martin Rachlewicz, Grzegorz Young, Amanda Zetterberg, Pentti Welker, Jeffrey M |
author_facet |
Buchwal, Agata Sullivan, Patrick F Macias-Fauria, Marc Post, Eric Myers-Smith, Isla H Stroeve, Julienne C Blok, Daan Tape, Ken D Forbes, Bruce C Ropars, Pascale Lévesque, Esther Elberling, Bo Angers-Blondin, Sandra Boyle, Joseph S Boudreau, Stéphane Boulanger-Lapointe, Noémie Gamm, Cassandra Hallinger, Martin Rachlewicz, Grzegorz Young, Amanda Zetterberg, Pentti Welker, Jeffrey M |
author_sort |
Buchwal, Agata |
title |
Divergence of Arctic shrub growth associated with sea ice decline. |
title_short |
Divergence of Arctic shrub growth associated with sea ice decline. |
title_full |
Divergence of Arctic shrub growth associated with sea ice decline. |
title_fullStr |
Divergence of Arctic shrub growth associated with sea ice decline. |
title_full_unstemmed |
Divergence of Arctic shrub growth associated with sea ice decline. |
title_sort |
divergence of arctic shrub growth associated with sea ice decline. |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/7770x8b8 |
op_coverage |
33334 - 33344 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice Tundra |
genre_facet |
Arctic Sea ice Tundra |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 117, iss 52 |
op_relation |
qt7770x8b8 https://escholarship.org/uc/item/7770x8b8 |
op_rights |
public |
_version_ |
1766309039570944000 |