Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands
Abstract Pristine sub-Antarctic islands terrestrial ecosystems, including many endemic species, are highly threatened by human-induced cosmopolitan plant invasion. We propose that native plant suppression could be further facilitated by the subsequent invasion by generalist pest species that could e...
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Online Access: | http://dx.doi.org/10.1093/ee/nvab122 https://academic.oup.com/ee/article-pdf/51/1/204/42539636/nvab122.pdf |
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croxfordunivpr:10.1093/ee/nvab122 2023-05-15T14:05:51+02:00 Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands Hullé, Maurice Till, Milena Plantegenest, Manuel Ranger, Christopher French Polar Institute French National Center for Scientific Research 2021 http://dx.doi.org/10.1093/ee/nvab122 https://academic.oup.com/ee/article-pdf/51/1/204/42539636/nvab122.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Environmental Entomology volume 51, issue 1, page 204-209 ISSN 0046-225X 1938-2936 Insect Science Ecology Ecology, Evolution, Behavior and Systematics journal-article 2021 croxfordunivpr https://doi.org/10.1093/ee/nvab122 2022-04-15T06:22:43Z Abstract Pristine sub-Antarctic islands terrestrial ecosystems, including many endemic species, are highly threatened by human-induced cosmopolitan plant invasion. We propose that native plant suppression could be further facilitated by the subsequent invasion by generalist pest species that could exacerbate their competitive exclusion through the process of apparent competition. By comparing the biological parameters of an invasive aphid species, Myzus ascalonicus, on one native (Acaena magellanica) and one invasive (Senecio vulgaris) plant species, we showed that survival and fecundity were higher and development time lower on the native plant species than on the invasive one. Moreover, comparing the effect of a temperature increase on the population dynamics of M. ascalonicus on the two plants, we showed that the relative profitability of the native species is further amplified by warming. Hence, while pest population doubling time is 28% higher on the invasive plant under current temperature, it would become 40% higher with an increase in temperature of 3°C. Consequently, our findings demonstrate that global warming could exacerbate competitive exclusion of native plants by invasive plants in sub-Antarctic islands by its indirect effect on the apparent competition mediated by generalist phytophagous pests. Article in Journal/Newspaper Antarc* Antarctic Oxford University Press (via Crossref) Antarctic Environmental Entomology |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Insect Science Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Insect Science Ecology Ecology, Evolution, Behavior and Systematics Hullé, Maurice Till, Milena Plantegenest, Manuel Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
topic_facet |
Insect Science Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Pristine sub-Antarctic islands terrestrial ecosystems, including many endemic species, are highly threatened by human-induced cosmopolitan plant invasion. We propose that native plant suppression could be further facilitated by the subsequent invasion by generalist pest species that could exacerbate their competitive exclusion through the process of apparent competition. By comparing the biological parameters of an invasive aphid species, Myzus ascalonicus, on one native (Acaena magellanica) and one invasive (Senecio vulgaris) plant species, we showed that survival and fecundity were higher and development time lower on the native plant species than on the invasive one. Moreover, comparing the effect of a temperature increase on the population dynamics of M. ascalonicus on the two plants, we showed that the relative profitability of the native species is further amplified by warming. Hence, while pest population doubling time is 28% higher on the invasive plant under current temperature, it would become 40% higher with an increase in temperature of 3°C. Consequently, our findings demonstrate that global warming could exacerbate competitive exclusion of native plants by invasive plants in sub-Antarctic islands by its indirect effect on the apparent competition mediated by generalist phytophagous pests. |
author2 |
Ranger, Christopher French Polar Institute French National Center for Scientific Research |
format |
Article in Journal/Newspaper |
author |
Hullé, Maurice Till, Milena Plantegenest, Manuel |
author_facet |
Hullé, Maurice Till, Milena Plantegenest, Manuel |
author_sort |
Hullé, Maurice |
title |
Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
title_short |
Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
title_full |
Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
title_fullStr |
Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
title_full_unstemmed |
Global Warming Could Magnify Insect-Driven Apparent Competition Between Native and Introduced Host Plants in Sub-Antarctic Islands |
title_sort |
global warming could magnify insect-driven apparent competition between native and introduced host plants in sub-antarctic islands |
publisher |
Oxford University Press (OUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1093/ee/nvab122 https://academic.oup.com/ee/article-pdf/51/1/204/42539636/nvab122.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Environmental Entomology volume 51, issue 1, page 204-209 ISSN 0046-225X 1938-2936 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/ee/nvab122 |
container_title |
Environmental Entomology |
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1766277678423343104 |