Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation
Much of the work on the responses of terrestrial arthropods to high and low temperatures has been done on model organisms such as Drosophila. However, considerable variation in thermotolerance is partitioned at the family level and above, raising questions about the broader applicability of this wor...
Published in: | Biological Journal of the Linnean Society |
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Online Access: | http://hdl.handle.net/10019.1/10941 https://doi.org/10.1046/j.1095-8312.2003.00154.x |
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/10941 2023-11-12T04:04:29+01:00 Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation Klok C.J. Chown S.L. 2003 http://hdl.handle.net/10019.1/10941 https://doi.org/10.1046/j.1095-8312.2003.00154.x unknown Biological Journal of the Linnean Society 78 3 244066 doi:10.1046/j.1095-8312.2003.00154.x http://hdl.handle.net/10019.1/10941 arthropod interspecific variation phenotypic plasticity temperature tolerance Heard Island and McDonald Islands Indian Ocean Arthropoda Curculionidae Article 2003 ftunstellenbosch https://doi.org/10.1046/j.1095-8312.2003.00154.x 2023-10-22T07:35:34Z Much of the work on the responses of terrestrial arthropods to high and low temperatures has been done on model organisms such as Drosophila. However, considerable variation in thermotolerance is partitioned at the family level and above, raising questions about the broader applicability of this work to other taxa. Here we investigate resistance to high and low temperatures, following different temperature treatments, in ten species and 31 populations of weevils found on sub-Antarctic Heard Island and Marion Island, which have substantially different climates. In these weevils there is considerable interspecific and among-population variation in critical thermal minimum (CTmin) and critical thermal maximum (CTmax), but most of this variation in critical limits can be ascribed to phenotypic plasticity. We find no relationship between CTmin and CTmax at the species level, and this is true also of populations and of responses to the temperature treatments. In general, plastic (acclimation) changes in CTmin are larger than those in CTmax. Our data therefore provide support for the idea that resistance to heat and to cold are decoupled in terrestrial arthropods. Furthermore, our results suggest that investigations of physiological limits to species borders should incorporate the effects of phenotypic plasticity on physiological capabilities. © 2003 The Linnean Society of London. Article Article in Journal/Newspaper Antarc* Antarctic Heard Island Marion Island McDonald Islands Stellenbosch University: SUNScholar Research Repository Antarctic Heard Island Indian Heard Island ENVELOPE(73.510,73.510,-53.117,-53.117) Heard ENVELOPE(73.510,73.510,-53.117,-53.117) McDonald Islands ENVELOPE(72.600,72.600,-53.033,-53.033) Biological Journal of the Linnean Society 78 3 401 414 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
arthropod interspecific variation phenotypic plasticity temperature tolerance Heard Island and McDonald Islands Indian Ocean Arthropoda Curculionidae |
spellingShingle |
arthropod interspecific variation phenotypic plasticity temperature tolerance Heard Island and McDonald Islands Indian Ocean Arthropoda Curculionidae Klok C.J. Chown S.L. Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
topic_facet |
arthropod interspecific variation phenotypic plasticity temperature tolerance Heard Island and McDonald Islands Indian Ocean Arthropoda Curculionidae |
description |
Much of the work on the responses of terrestrial arthropods to high and low temperatures has been done on model organisms such as Drosophila. However, considerable variation in thermotolerance is partitioned at the family level and above, raising questions about the broader applicability of this work to other taxa. Here we investigate resistance to high and low temperatures, following different temperature treatments, in ten species and 31 populations of weevils found on sub-Antarctic Heard Island and Marion Island, which have substantially different climates. In these weevils there is considerable interspecific and among-population variation in critical thermal minimum (CTmin) and critical thermal maximum (CTmax), but most of this variation in critical limits can be ascribed to phenotypic plasticity. We find no relationship between CTmin and CTmax at the species level, and this is true also of populations and of responses to the temperature treatments. In general, plastic (acclimation) changes in CTmin are larger than those in CTmax. Our data therefore provide support for the idea that resistance to heat and to cold are decoupled in terrestrial arthropods. Furthermore, our results suggest that investigations of physiological limits to species borders should incorporate the effects of phenotypic plasticity on physiological capabilities. © 2003 The Linnean Society of London. Article |
format |
Article in Journal/Newspaper |
author |
Klok C.J. Chown S.L. |
author_facet |
Klok C.J. Chown S.L. |
author_sort |
Klok C.J. |
title |
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
title_short |
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
title_full |
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
title_fullStr |
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
title_full_unstemmed |
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation |
title_sort |
resistance to temperature extremes in sub-antarctic weevils: interspecific variation, population differentiation and acclimation |
publishDate |
2003 |
url |
http://hdl.handle.net/10019.1/10941 https://doi.org/10.1046/j.1095-8312.2003.00154.x |
long_lat |
ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(72.600,72.600,-53.033,-53.033) |
geographic |
Antarctic Heard Island Indian Heard Island Heard McDonald Islands |
geographic_facet |
Antarctic Heard Island Indian Heard Island Heard McDonald Islands |
genre |
Antarc* Antarctic Heard Island Marion Island McDonald Islands |
genre_facet |
Antarc* Antarctic Heard Island Marion Island McDonald Islands |
op_relation |
Biological Journal of the Linnean Society 78 3 244066 doi:10.1046/j.1095-8312.2003.00154.x http://hdl.handle.net/10019.1/10941 |
op_doi |
https://doi.org/10.1046/j.1095-8312.2003.00154.x |
container_title |
Biological Journal of the Linnean Society |
container_volume |
78 |
container_issue |
3 |
container_start_page |
401 |
op_container_end_page |
414 |
_version_ |
1782341640916041728 |