Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi
An insect’s ability to tolerate winter conditions is a critical determinant of its success. This is true for both native and invasive species, and especially so in harsh polar environments. The midge Eretmoptera murphyi (Diptera, Chironomidae) is invasive to maritime Antarctic Signy Island, and the...
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ftninstnf:oai:brage.nina.no:11250/2728042 2023-05-15T13:49:50+02:00 Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi Bartlett, Jesamine Convey, Peter Hayward, Scott A. L. 2020 application/pdf https://hdl.handle.net/11250/2728042 https://doi.org/10.3390/insects11030147 eng eng Insects. 2020, 11 (3) urn:issn:2075-4450 https://hdl.handle.net/11250/2728042 https://doi.org/10.3390/insects11030147 cristin:1820316 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 by the authors. CC-BY 11 Insects 3 microclimate insect physiology overwintering invasion biology thermal thresholds VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Peer reviewed Journal article 2020 ftninstnf https://doi.org/10.3390/insects11030147 2021-12-23T07:16:47Z An insect’s ability to tolerate winter conditions is a critical determinant of its success. This is true for both native and invasive species, and especially so in harsh polar environments. The midge Eretmoptera murphyi (Diptera, Chironomidae) is invasive to maritime Antarctic Signy Island, and the ability of fourth instar larvae to tolerate freezing is hypothesized to allow the species to extend its range further south. However, no detailed assessment of stress tolerance in any other life stage has yet been conducted. Here, we report that, although larvae, pupae and adults all have supercooling points (SCPs) of around −5 °C, only the larvae are freeze-tolerant, and that cold-hardiness increases with larval maturity. Eggs are freeze-avoiding and have an SCP of around −17 °C. At −3.34 °C, the CTmin activity thresholds of adults are close to their SCP of −5 °C, and they are likely chill-susceptible. Larvae could not withstand the anoxic conditions of ice entrapment or submergence in water beyond 28 d. The data obtained here indicate that the cold-tolerance characteristics of this invasive midge would permit it to colonize areas further south, including much of the western coast of the Antarctic Peninsula. View Full-Text microclimate; insect physiology; overwintering; invasion biology; thermal thresholds publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Signy Island Norwegian Institute for Nature Research: Brage NINA Antarctic Antarctic Peninsula Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) The Antarctic Insects 11 3 147 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
microclimate insect physiology overwintering invasion biology thermal thresholds VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
microclimate insect physiology overwintering invasion biology thermal thresholds VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Bartlett, Jesamine Convey, Peter Hayward, Scott A. L. Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
topic_facet |
microclimate insect physiology overwintering invasion biology thermal thresholds VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
An insect’s ability to tolerate winter conditions is a critical determinant of its success. This is true for both native and invasive species, and especially so in harsh polar environments. The midge Eretmoptera murphyi (Diptera, Chironomidae) is invasive to maritime Antarctic Signy Island, and the ability of fourth instar larvae to tolerate freezing is hypothesized to allow the species to extend its range further south. However, no detailed assessment of stress tolerance in any other life stage has yet been conducted. Here, we report that, although larvae, pupae and adults all have supercooling points (SCPs) of around −5 °C, only the larvae are freeze-tolerant, and that cold-hardiness increases with larval maturity. Eggs are freeze-avoiding and have an SCP of around −17 °C. At −3.34 °C, the CTmin activity thresholds of adults are close to their SCP of −5 °C, and they are likely chill-susceptible. Larvae could not withstand the anoxic conditions of ice entrapment or submergence in water beyond 28 d. The data obtained here indicate that the cold-tolerance characteristics of this invasive midge would permit it to colonize areas further south, including much of the western coast of the Antarctic Peninsula. View Full-Text microclimate; insect physiology; overwintering; invasion biology; thermal thresholds publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bartlett, Jesamine Convey, Peter Hayward, Scott A. L. |
author_facet |
Bartlett, Jesamine Convey, Peter Hayward, Scott A. L. |
author_sort |
Bartlett, Jesamine |
title |
Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
title_short |
Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
title_full |
Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
title_fullStr |
Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
title_full_unstemmed |
Surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge Eretmoptera murphyi |
title_sort |
surviving the antarctic winter—life stage cold tolerance and ice entrapment survival in the invasive chironomid midge eretmoptera murphyi |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2728042 https://doi.org/10.3390/insects11030147 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) |
geographic |
Antarctic Antarctic Peninsula Signy Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Signy Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Signy Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Signy Island |
op_source |
11 Insects 3 |
op_relation |
Insects. 2020, 11 (3) urn:issn:2075-4450 https://hdl.handle.net/11250/2728042 https://doi.org/10.3390/insects11030147 cristin:1820316 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 by the authors. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/insects11030147 |
container_title |
Insects |
container_volume |
11 |
container_issue |
3 |
container_start_page |
147 |
_version_ |
1766252355140976640 |