Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance
Abstract Background and Aims Global warming has large effects on the performance and spatial distribution of plants, and increasingly facilitates the spread of invasive species. Particularly vulnerable is the vegetation of cold environments where indigenous plants selected for cold tolerance can hav...
Published in: | Annals of Botany |
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Online Access: | http://dx.doi.org/10.1093/aob/mcz156 http://academic.oup.com/aob/advance-article-pdf/doi/10.1093/aob/mcz156/30099556/mcz156.pdf http://academic.oup.com/aob/article-pdf/125/5/765/33125840/mcz156.pdf |
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croxfordunivpr:10.1093/aob/mcz156 2024-06-09T07:39:12+00:00 Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance Ripley, Brad S Edwardes, Amy Rossouw, Marius W Smith, Valdon R Midgley, Guy F South African National Research Foundation 2019 http://dx.doi.org/10.1093/aob/mcz156 http://academic.oup.com/aob/advance-article-pdf/doi/10.1093/aob/mcz156/30099556/mcz156.pdf http://academic.oup.com/aob/article-pdf/125/5/765/33125840/mcz156.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Annals of Botany volume 125, issue 5, page 765-773 ISSN 0305-7364 1095-8290 journal-article 2019 croxfordunivpr https://doi.org/10.1093/aob/mcz156 2024-05-10T13:14:33Z Abstract Background and Aims Global warming has large effects on the performance and spatial distribution of plants, and increasingly facilitates the spread of invasive species. Particularly vulnerable is the vegetation of cold environments where indigenous plants selected for cold tolerance can have reduced phenotypic plasticity and associated lower capacity to respond to warming temperatures. In contrast, invasive species can be phenotypically plastic and respond positively to climate change, but at the expense of stress tolerance. Methods We investigate this trade-off in traits, measuring the photosynthetic response to warming, chilling tolerance and specific leaf area (SLA) of Pooid grasses. We compare this between invasive and non-invasive grasses and correlate this to their range expansions on a cold sub-Antarctic island that has warmed significantly in the past five decades. We determined whether these responses remained consistent after temperature acclimation. Key Results Invasive species responded strongly to warming, increasing photosynthetic rates by up to 2-fold, while non-invasive species did not respond. The response was associated with increased stomatal conductance, but not with modified photosynthetic metabolism. Electrolyte leakage and SLA were higher in invasive than in non-invasive species. Acclimation altered the photosynthetic response and invasive species responded to warm temperatures irrespective of acclimation, while non-invasive species responded only after acclimation to warm temperature. Conclusions Traits scaled linearly with rates of range expansion and demonstrate that under sub-Antarctic conditions, anthropogenic warming over the last 50 years may have favoured species with greater capacity to respond photosynthetically to warming to the detriment of species that cannot, and negated the advantage that chilling tolerance would have conferred on endemic species in the past. This suggests that species of cold ecosystems could be particularly vulnerable to warming as selection for ... Article in Journal/Newspaper Antarc* Antarctic Marion Island Oxford University Press Antarctic Annals of Botany 125 5 765 773 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Background and Aims Global warming has large effects on the performance and spatial distribution of plants, and increasingly facilitates the spread of invasive species. Particularly vulnerable is the vegetation of cold environments where indigenous plants selected for cold tolerance can have reduced phenotypic plasticity and associated lower capacity to respond to warming temperatures. In contrast, invasive species can be phenotypically plastic and respond positively to climate change, but at the expense of stress tolerance. Methods We investigate this trade-off in traits, measuring the photosynthetic response to warming, chilling tolerance and specific leaf area (SLA) of Pooid grasses. We compare this between invasive and non-invasive grasses and correlate this to their range expansions on a cold sub-Antarctic island that has warmed significantly in the past five decades. We determined whether these responses remained consistent after temperature acclimation. Key Results Invasive species responded strongly to warming, increasing photosynthetic rates by up to 2-fold, while non-invasive species did not respond. The response was associated with increased stomatal conductance, but not with modified photosynthetic metabolism. Electrolyte leakage and SLA were higher in invasive than in non-invasive species. Acclimation altered the photosynthetic response and invasive species responded to warm temperatures irrespective of acclimation, while non-invasive species responded only after acclimation to warm temperature. Conclusions Traits scaled linearly with rates of range expansion and demonstrate that under sub-Antarctic conditions, anthropogenic warming over the last 50 years may have favoured species with greater capacity to respond photosynthetically to warming to the detriment of species that cannot, and negated the advantage that chilling tolerance would have conferred on endemic species in the past. This suggests that species of cold ecosystems could be particularly vulnerable to warming as selection for ... |
author2 |
South African National Research Foundation |
format |
Article in Journal/Newspaper |
author |
Ripley, Brad S Edwardes, Amy Rossouw, Marius W Smith, Valdon R Midgley, Guy F |
spellingShingle |
Ripley, Brad S Edwardes, Amy Rossouw, Marius W Smith, Valdon R Midgley, Guy F Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
author_facet |
Ripley, Brad S Edwardes, Amy Rossouw, Marius W Smith, Valdon R Midgley, Guy F |
author_sort |
Ripley, Brad S |
title |
Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
title_short |
Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
title_full |
Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
title_fullStr |
Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
title_full_unstemmed |
Invasive grasses of sub-Antarctic Marion Island respond to increasing temperatures at the expense of chilling tolerance |
title_sort |
invasive grasses of sub-antarctic marion island respond to increasing temperatures at the expense of chilling tolerance |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/aob/mcz156 http://academic.oup.com/aob/advance-article-pdf/doi/10.1093/aob/mcz156/30099556/mcz156.pdf http://academic.oup.com/aob/article-pdf/125/5/765/33125840/mcz156.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Marion Island |
genre_facet |
Antarc* Antarctic Marion Island |
op_source |
Annals of Botany volume 125, issue 5, page 765-773 ISSN 0305-7364 1095-8290 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/aob/mcz156 |
container_title |
Annals of Botany |
container_volume |
125 |
container_issue |
5 |
container_start_page |
765 |
op_container_end_page |
773 |
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1801377909475115008 |