Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming
Abstract In the high Arctic, plant community species composition generally responds slowly to climate warming, whereas less is known about the community functional trait responses and consequences for ecosystem functioning. The slow species turnover and large distribution ranges of many Arctic plant...
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crwiley:10.1002/ecm.1555 2024-09-30T14:29:48+00:00 Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming Jónsdóttir, Ingibjörg S. Halbritter, Aud H. Christiansen, Casper T. Althuizen, Inge H. J. Haugum, Siri V. Henn, Jonathan J. Björnsdóttir, Katrín Maitner, Brian Salvin Malhi, Yadvinder Michaletz, Sean T. Roos, Ruben E. Klanderud, Kari Lee, Hanna Enquist, Brian J. Vandvik, Vigdis Norges Forskningsråd University of Iceland 2022 http://dx.doi.org/10.1002/ecm.1555 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ecm.1555 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ecm.1555 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecm.1555 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecological Monographs volume 93, issue 1 ISSN 0012-9615 1557-7015 journal-article 2022 crwiley https://doi.org/10.1002/ecm.1555 2024-09-05T05:06:12Z Abstract In the high Arctic, plant community species composition generally responds slowly to climate warming, whereas less is known about the community functional trait responses and consequences for ecosystem functioning. The slow species turnover and large distribution ranges of many Arctic plant species suggest a significant role of intraspecific trait variability in functional responses to climate change. Here we compare taxonomic and functional community compositional responses to a long‐term (17‐year) warming experiment in Svalbard, Norway, replicated across three major high Arctic habitats shaped by topography and contrasting snow regimes. We observed taxonomic compositional changes in all plant communities over time. Still, responses to experimental warming were minor and most pronounced in the drier habitats with relatively early snowmelt timing and long growing seasons ( Cassiope and Dryas heaths). The habitats were clearly separated in functional trait space, defined by 12 size‐ and leaf economics‐related traits, primarily due to interspecific trait variation. Functional traits also responded to experimental warming, most prominently in the Dryas heath and mostly due to intraspecific trait variation. Leaf area and mass increased and leaf δ 15 N decreased in response to the warming treatment. Intraspecific trait variability ranged between 30% and 71% of the total trait variation, reflecting the functional resilience of those communities, dominated by long‐lived plants, due to either phenotypic plasticity or genotypic variation, which most likely underlies the observed resistance of high Arctic vegetation to climate warming. We further explored the consequences of trait variability for ecosystem functioning by measuring peak season CO 2 fluxes. Together, environmental, taxonomic, and functional trait variables explained a large proportion of the variation in net ecosystem exchange (NEE), which increased when intraspecific trait variation was accounted for. In contrast, even though ecosystem respiration ... Article in Journal/Newspaper Arctic Climate change Svalbard Wiley Online Library Arctic Svalbard Norway Ecological Monographs 93 1 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In the high Arctic, plant community species composition generally responds slowly to climate warming, whereas less is known about the community functional trait responses and consequences for ecosystem functioning. The slow species turnover and large distribution ranges of many Arctic plant species suggest a significant role of intraspecific trait variability in functional responses to climate change. Here we compare taxonomic and functional community compositional responses to a long‐term (17‐year) warming experiment in Svalbard, Norway, replicated across three major high Arctic habitats shaped by topography and contrasting snow regimes. We observed taxonomic compositional changes in all plant communities over time. Still, responses to experimental warming were minor and most pronounced in the drier habitats with relatively early snowmelt timing and long growing seasons ( Cassiope and Dryas heaths). The habitats were clearly separated in functional trait space, defined by 12 size‐ and leaf economics‐related traits, primarily due to interspecific trait variation. Functional traits also responded to experimental warming, most prominently in the Dryas heath and mostly due to intraspecific trait variation. Leaf area and mass increased and leaf δ 15 N decreased in response to the warming treatment. Intraspecific trait variability ranged between 30% and 71% of the total trait variation, reflecting the functional resilience of those communities, dominated by long‐lived plants, due to either phenotypic plasticity or genotypic variation, which most likely underlies the observed resistance of high Arctic vegetation to climate warming. We further explored the consequences of trait variability for ecosystem functioning by measuring peak season CO 2 fluxes. Together, environmental, taxonomic, and functional trait variables explained a large proportion of the variation in net ecosystem exchange (NEE), which increased when intraspecific trait variation was accounted for. In contrast, even though ecosystem respiration ... |
author2 |
Norges Forskningsråd University of Iceland |
format |
Article in Journal/Newspaper |
author |
Jónsdóttir, Ingibjörg S. Halbritter, Aud H. Christiansen, Casper T. Althuizen, Inge H. J. Haugum, Siri V. Henn, Jonathan J. Björnsdóttir, Katrín Maitner, Brian Salvin Malhi, Yadvinder Michaletz, Sean T. Roos, Ruben E. Klanderud, Kari Lee, Hanna Enquist, Brian J. Vandvik, Vigdis |
spellingShingle |
Jónsdóttir, Ingibjörg S. Halbritter, Aud H. Christiansen, Casper T. Althuizen, Inge H. J. Haugum, Siri V. Henn, Jonathan J. Björnsdóttir, Katrín Maitner, Brian Salvin Malhi, Yadvinder Michaletz, Sean T. Roos, Ruben E. Klanderud, Kari Lee, Hanna Enquist, Brian J. Vandvik, Vigdis Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
author_facet |
Jónsdóttir, Ingibjörg S. Halbritter, Aud H. Christiansen, Casper T. Althuizen, Inge H. J. Haugum, Siri V. Henn, Jonathan J. Björnsdóttir, Katrín Maitner, Brian Salvin Malhi, Yadvinder Michaletz, Sean T. Roos, Ruben E. Klanderud, Kari Lee, Hanna Enquist, Brian J. Vandvik, Vigdis |
author_sort |
Jónsdóttir, Ingibjörg S. |
title |
Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
title_short |
Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
title_full |
Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
title_fullStr |
Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
title_full_unstemmed |
Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming |
title_sort |
intraspecific trait variability is a key feature underlying high arctic plant community resistance to climate warming |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/ecm.1555 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ecm.1555 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ecm.1555 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecm.1555 |
geographic |
Arctic Svalbard Norway |
geographic_facet |
Arctic Svalbard Norway |
genre |
Arctic Climate change Svalbard |
genre_facet |
Arctic Climate change Svalbard |
op_source |
Ecological Monographs volume 93, issue 1 ISSN 0012-9615 1557-7015 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ecm.1555 |
container_title |
Ecological Monographs |
container_volume |
93 |
container_issue |
1 |
_version_ |
1811635009771012096 |