Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra
Climate warming is inducing widespread vegetation changes in Arctic tundra ecosystems, with the potential to alter carbon and nutrient dynamics between vegetation and soils. Yet, we lack a detailed understanding of how variation in vegetation and topography influences fine‐scale temperatures (“micro...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826065/ http://www.ncbi.nlm.nih.gov/pubmed/36083034 https://doi.org/10.1111/gcb.16426 |
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ftpubmed:oai:pubmedcentral.nih.gov:9826065 2023-05-15T14:56:44+02:00 Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra von Oppen, Jonathan Assmann, Jakob J. Bjorkman, Anne D. Treier, Urs A. Elberling, Bo Nabe‐Nielsen, Jacob Normand, Signe 2022-09-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826065/ http://www.ncbi.nlm.nih.gov/pubmed/36083034 https://doi.org/10.1111/gcb.16426 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826065/ http://www.ncbi.nlm.nih.gov/pubmed/36083034 http://dx.doi.org/10.1111/gcb.16426 © 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Glob Chang Biol Research Articles Text 2022 ftpubmed https://doi.org/10.1111/gcb.16426 2023-01-15T01:49:27Z Climate warming is inducing widespread vegetation changes in Arctic tundra ecosystems, with the potential to alter carbon and nutrient dynamics between vegetation and soils. Yet, we lack a detailed understanding of how variation in vegetation and topography influences fine‐scale temperatures (“microclimate”) that mediate these dynamics, and at what resolution vegetation needs to be sampled to capture these effects. We monitored microclimate at 90 plots across a tundra landscape in western Greenland. Our stratified random study design covered gradients of topography and vegetation, while nested plots (0.8–100 m(2)) enabled comparison across different sampling resolutions. We used Bayesian mixed‐effect models to quantify the direct influence of plot‐level topography, moisture and vegetation on soil, near‐surface and canopy‐level temperatures (−6, 2, and 15 cm). During the growing season, colder soils were predicted by shrub cover (−0.24°C per 10% increase), bryophyte cover (−0.35°C per 10% increase), and vegetation height (−0.17°C per 1 cm increase). The same three factors also predicted the magnitude of differences between soil and above‐ground temperatures, indicating warmer soils at low cover/height, but colder soils under closed/taller canopies. These findings were consistent across plot sizes, suggesting that spatial predictions of microclimate may be possible at the operational scales of satellite products. During winter, snow cover (+0.75°C per 10 snow‐covered days) was the key predictor of soil microclimate. Topography and moisture explained little variation in the measured temperatures. Our results not only underline the close connection of vegetation and snow with microclimate in the Arctic tundra but also point to the need for more studies disentangling their complex interplay across tundra environments and seasons. Future shifts in vegetation cover and height will likely mediate the impact of atmospheric warming on the tundra soil environment, with potential implications for below‐ground organisms and ... Text Arctic Greenland Tundra PubMed Central (PMC) Arctic Greenland Global Change Biology 28 24 7296 7312 |
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Research Articles |
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Research Articles von Oppen, Jonathan Assmann, Jakob J. Bjorkman, Anne D. Treier, Urs A. Elberling, Bo Nabe‐Nielsen, Jacob Normand, Signe Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
topic_facet |
Research Articles |
description |
Climate warming is inducing widespread vegetation changes in Arctic tundra ecosystems, with the potential to alter carbon and nutrient dynamics between vegetation and soils. Yet, we lack a detailed understanding of how variation in vegetation and topography influences fine‐scale temperatures (“microclimate”) that mediate these dynamics, and at what resolution vegetation needs to be sampled to capture these effects. We monitored microclimate at 90 plots across a tundra landscape in western Greenland. Our stratified random study design covered gradients of topography and vegetation, while nested plots (0.8–100 m(2)) enabled comparison across different sampling resolutions. We used Bayesian mixed‐effect models to quantify the direct influence of plot‐level topography, moisture and vegetation on soil, near‐surface and canopy‐level temperatures (−6, 2, and 15 cm). During the growing season, colder soils were predicted by shrub cover (−0.24°C per 10% increase), bryophyte cover (−0.35°C per 10% increase), and vegetation height (−0.17°C per 1 cm increase). The same three factors also predicted the magnitude of differences between soil and above‐ground temperatures, indicating warmer soils at low cover/height, but colder soils under closed/taller canopies. These findings were consistent across plot sizes, suggesting that spatial predictions of microclimate may be possible at the operational scales of satellite products. During winter, snow cover (+0.75°C per 10 snow‐covered days) was the key predictor of soil microclimate. Topography and moisture explained little variation in the measured temperatures. Our results not only underline the close connection of vegetation and snow with microclimate in the Arctic tundra but also point to the need for more studies disentangling their complex interplay across tundra environments and seasons. Future shifts in vegetation cover and height will likely mediate the impact of atmospheric warming on the tundra soil environment, with potential implications for below‐ground organisms and ... |
format |
Text |
author |
von Oppen, Jonathan Assmann, Jakob J. Bjorkman, Anne D. Treier, Urs A. Elberling, Bo Nabe‐Nielsen, Jacob Normand, Signe |
author_facet |
von Oppen, Jonathan Assmann, Jakob J. Bjorkman, Anne D. Treier, Urs A. Elberling, Bo Nabe‐Nielsen, Jacob Normand, Signe |
author_sort |
von Oppen, Jonathan |
title |
Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
title_short |
Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
title_full |
Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
title_fullStr |
Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
title_full_unstemmed |
Cross‐scale regulation of seasonal microclimate by vegetation and snow in the Arctic tundra |
title_sort |
cross‐scale regulation of seasonal microclimate by vegetation and snow in the arctic tundra |
publisher |
John Wiley and Sons Inc. |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826065/ http://www.ncbi.nlm.nih.gov/pubmed/36083034 https://doi.org/10.1111/gcb.16426 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Tundra |
genre_facet |
Arctic Greenland Tundra |
op_source |
Glob Chang Biol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9826065/ http://www.ncbi.nlm.nih.gov/pubmed/36083034 http://dx.doi.org/10.1111/gcb.16426 |
op_rights |
© 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/gcb.16426 |
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Global Change Biology |
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28 |
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24 |
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7296 |
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7312 |
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