Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth
Abstract: Most manipulation experiments simulating global change in tundra were short-term or did not measure plant growth directly. Here, we assessed the growth of three shrubs (Cassiope tetragona, Empetrum hermaphroditum and Betula nana) at a subarctic heath in Abisko (Northern Sweden) after 22 ye...
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ftunivantwerpen:c:irua:100317 2023-07-16T03:51:08+02:00 Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth Campioli, Matteo Leblans, Niki Michelsen, Anders 2012 pdf https://hdl.handle.net/10067/1003170151162165141 https://repository.uantwerpen.be/docman/irua/01c120/2563.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1371/JOURNAL.PONE.0034842 info:eu-repo/semantics/altIdentifier/isi/000305338600054 info:eu-repo/semantics/openAccess 1932-6203 PLoS ONE Biology Human medicine info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftunivantwerpen https://doi.org/10.1371/JOURNAL.PONE.0034842 2023-06-26T22:16:02Z Abstract: Most manipulation experiments simulating global change in tundra were short-term or did not measure plant growth directly. Here, we assessed the growth of three shrubs (Cassiope tetragona, Empetrum hermaphroditum and Betula nana) at a subarctic heath in Abisko (Northern Sweden) after 22 years of warming (passive greenhouses), fertilisation (nutrients addition) and shading (hessian fabric), and compare this to observations from the first decade of treatment. We assessed the growth rate of current-year leaves and apical stem (primary growth) and cambial growth (secondary growth), and integrated growth rates with morphological measurements and species coverage. Primary-and total growth of Cassiope and Empetrum were unaffected by manipulations, whereas growth was substantially reduced under fertilisation and shading (but not warming) for Betula. Overall, shrub height and length tended to increase under fertilisation and warming, whereas branching increased mostly in shaded Cassiope. Morphological changes were coupled to increased secondary growth under fertilisation. The species coverage showed a remarkable increase in graminoids in fertilised plots. Shrub response to fertilisation was positive in the short-term but changed over time, likely because of an increased competition with graminoids. More erected postures and large, canopies (requiring enhanced secondary growth for stem reinforcement) likely compensated for the increased light competition in Empetrum and Cassiope but did not avoid growth reduction in the shade intolerant Betula. The impact of warming and shading on shrub growth was more conservative. The lack of growth enhancement under warming suggests the absence of long-term acclimation for processes limiting biomass production. The lack of negative effects of shading on Cassiope was linked to morphological changes increasing the photosynthetic surface. Overall, tundra shrubs showed developmental plasticity over the longer term. However, such plasticity was associated clearly with growth rate ... Article in Journal/Newspaper Abisko Betula nana Cassiope tetragona Northern Sweden Subarctic Tundra IRUA - Institutional Repository van de Universiteit Antwerpen Abisko ENVELOPE(18.829,18.829,68.349,68.349) PLoS ONE 7 4 e34842 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Biology Human medicine |
spellingShingle |
Biology Human medicine Campioli, Matteo Leblans, Niki Michelsen, Anders Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
topic_facet |
Biology Human medicine |
description |
Abstract: Most manipulation experiments simulating global change in tundra were short-term or did not measure plant growth directly. Here, we assessed the growth of three shrubs (Cassiope tetragona, Empetrum hermaphroditum and Betula nana) at a subarctic heath in Abisko (Northern Sweden) after 22 years of warming (passive greenhouses), fertilisation (nutrients addition) and shading (hessian fabric), and compare this to observations from the first decade of treatment. We assessed the growth rate of current-year leaves and apical stem (primary growth) and cambial growth (secondary growth), and integrated growth rates with morphological measurements and species coverage. Primary-and total growth of Cassiope and Empetrum were unaffected by manipulations, whereas growth was substantially reduced under fertilisation and shading (but not warming) for Betula. Overall, shrub height and length tended to increase under fertilisation and warming, whereas branching increased mostly in shaded Cassiope. Morphological changes were coupled to increased secondary growth under fertilisation. The species coverage showed a remarkable increase in graminoids in fertilised plots. Shrub response to fertilisation was positive in the short-term but changed over time, likely because of an increased competition with graminoids. More erected postures and large, canopies (requiring enhanced secondary growth for stem reinforcement) likely compensated for the increased light competition in Empetrum and Cassiope but did not avoid growth reduction in the shade intolerant Betula. The impact of warming and shading on shrub growth was more conservative. The lack of growth enhancement under warming suggests the absence of long-term acclimation for processes limiting biomass production. The lack of negative effects of shading on Cassiope was linked to morphological changes increasing the photosynthetic surface. Overall, tundra shrubs showed developmental plasticity over the longer term. However, such plasticity was associated clearly with growth rate ... |
format |
Article in Journal/Newspaper |
author |
Campioli, Matteo Leblans, Niki Michelsen, Anders |
author_facet |
Campioli, Matteo Leblans, Niki Michelsen, Anders |
author_sort |
Campioli, Matteo |
title |
Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
title_short |
Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
title_full |
Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
title_fullStr |
Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
title_full_unstemmed |
Twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
title_sort |
twenty-two years of warming, fertilisation and shading of subarctic heath shrubs promote secondary growth and plasticity but not primary growth |
publishDate |
2012 |
url |
https://hdl.handle.net/10067/1003170151162165141 https://repository.uantwerpen.be/docman/irua/01c120/2563.pdf |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Abisko |
geographic_facet |
Abisko |
genre |
Abisko Betula nana Cassiope tetragona Northern Sweden Subarctic Tundra |
genre_facet |
Abisko Betula nana Cassiope tetragona Northern Sweden Subarctic Tundra |
op_source |
1932-6203 PLoS ONE |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/JOURNAL.PONE.0034842 info:eu-repo/semantics/altIdentifier/isi/000305338600054 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/JOURNAL.PONE.0034842 |
container_title |
PLoS ONE |
container_volume |
7 |
container_issue |
4 |
container_start_page |
e34842 |
_version_ |
1771551146989584384 |