Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island
The extent to which phenotypic plasticity might mediate short-term responses to environmental change is controversial. Nonetheless, theoretical work has made the prediction that plasticity should be common, especially in predictably variable environments by comparison with those that are either stab...
Published in: | Journal of Insect Physiology |
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/11281 2023-05-15T13:54:33+02:00 Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island Deere J.A. Sinclair B.J. Marshall D.J. Chown S.L. 2006 http://hdl.handle.net/10019.1/11281 https://doi.org/10.1016/j.jinsphys.2006.03.009 unknown climate change mite phenotypic plasticity subantarctic region temperature tolerance acclimatization animal Antarctica article heat Indian Ocean microclimate phenotype physiology Animals Antarctic Regions Indian Ocean Islands Mites Marion Island Prince Edward Islands Acari Ameronothroidea Oribatida Article 2006 ftunstellenbosch https://doi.org/10.1016/j.jinsphys.2006.03.009 2018-10-27T11:27:01Z The extent to which phenotypic plasticity might mediate short-term responses to environmental change is controversial. Nonetheless, theoretical work has made the prediction that plasticity should be common, especially in predictably variable environments by comparison with those that are either stable or unpredictable. Here we examine these predictions by comparing the phenotypic plasticity of thermal tolerances (supercooling point (SCP), lower lethal temperature (LLT), upper lethal temperature (ULT)), following acclimation at either 0, 5, 10 or 15 °C, for seven days, of five, closely-related ameronothroid mite species. These species occupy marine and terrestrial habitats, which differ in their predictability, on sub-Antarctic Marion Island. All of the species showed some evidence of pre-freeze mortality (SCPs -9 to -23 °C; LLTs -3 to -15 °C), though methodological effects might have contributed to the difference between the SCPs and LLTs, and the species are therefore considered moderately chill tolerant. ULTs varied between 36 °C and 41 °C. Acclimation effects on SCP and LLT were typically stronger in the marine than in the terrestrial species, in keeping with the prediction of strong acclimation responses in species from predictably variable environments, but weaker responses in species from unpredictable environments. The converse was found for ULT. These findings demonstrate that acclimation responses vary among traits in the same species. Moreover, they suggest that there is merit in assessing the predictability of changes in high and low environmental temperatures separately. © 2006 Elsevier Ltd. All rights reserved. Article Article in Journal/Newspaper Antarc* Antarctic Antarctica Marion Island Prince Edward Islands Mite Stellenbosch University: SUNScholar Research Repository Antarctic Indian Journal of Insect Physiology 52 7 693 700 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
climate change mite phenotypic plasticity subantarctic region temperature tolerance acclimatization animal Antarctica article heat Indian Ocean microclimate phenotype physiology Animals Antarctic Regions Indian Ocean Islands Mites Marion Island Prince Edward Islands Acari Ameronothroidea Oribatida |
spellingShingle |
climate change mite phenotypic plasticity subantarctic region temperature tolerance acclimatization animal Antarctica article heat Indian Ocean microclimate phenotype physiology Animals Antarctic Regions Indian Ocean Islands Mites Marion Island Prince Edward Islands Acari Ameronothroidea Oribatida Deere J.A. Sinclair B.J. Marshall D.J. Chown S.L. Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
topic_facet |
climate change mite phenotypic plasticity subantarctic region temperature tolerance acclimatization animal Antarctica article heat Indian Ocean microclimate phenotype physiology Animals Antarctic Regions Indian Ocean Islands Mites Marion Island Prince Edward Islands Acari Ameronothroidea Oribatida |
description |
The extent to which phenotypic plasticity might mediate short-term responses to environmental change is controversial. Nonetheless, theoretical work has made the prediction that plasticity should be common, especially in predictably variable environments by comparison with those that are either stable or unpredictable. Here we examine these predictions by comparing the phenotypic plasticity of thermal tolerances (supercooling point (SCP), lower lethal temperature (LLT), upper lethal temperature (ULT)), following acclimation at either 0, 5, 10 or 15 °C, for seven days, of five, closely-related ameronothroid mite species. These species occupy marine and terrestrial habitats, which differ in their predictability, on sub-Antarctic Marion Island. All of the species showed some evidence of pre-freeze mortality (SCPs -9 to -23 °C; LLTs -3 to -15 °C), though methodological effects might have contributed to the difference between the SCPs and LLTs, and the species are therefore considered moderately chill tolerant. ULTs varied between 36 °C and 41 °C. Acclimation effects on SCP and LLT were typically stronger in the marine than in the terrestrial species, in keeping with the prediction of strong acclimation responses in species from predictably variable environments, but weaker responses in species from unpredictable environments. The converse was found for ULT. These findings demonstrate that acclimation responses vary among traits in the same species. Moreover, they suggest that there is merit in assessing the predictability of changes in high and low environmental temperatures separately. © 2006 Elsevier Ltd. All rights reserved. Article |
format |
Article in Journal/Newspaper |
author |
Deere J.A. Sinclair B.J. Marshall D.J. Chown S.L. |
author_facet |
Deere J.A. Sinclair B.J. Marshall D.J. Chown S.L. |
author_sort |
Deere J.A. |
title |
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
title_short |
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
title_full |
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
title_fullStr |
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
title_full_unstemmed |
Phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-Antarctic Marion Island |
title_sort |
phenotypic plasticity of thermal tolerances in five oribatid mite species from sub-antarctic marion island |
publishDate |
2006 |
url |
http://hdl.handle.net/10019.1/11281 https://doi.org/10.1016/j.jinsphys.2006.03.009 |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic Antarctica Marion Island Prince Edward Islands Mite |
genre_facet |
Antarc* Antarctic Antarctica Marion Island Prince Edward Islands Mite |
op_doi |
https://doi.org/10.1016/j.jinsphys.2006.03.009 |
container_title |
Journal of Insect Physiology |
container_volume |
52 |
container_issue |
7 |
container_start_page |
693 |
op_container_end_page |
700 |
_version_ |
1766260536060674048 |