Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island
It is widely held both in the physiological literature, and more generally, that the average characteristics of species within an assemblage differ among sites. Such generalizations should be based on investigations of whole assemblages at sites, but this is rarely done. Here, such a study is undert...
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/119902 2023-05-15T13:57:32+02:00 Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island Janion, C. Worland, M.R. Chown, S.L. 2010-11-23T08:30:33Z 3326458 bytes application/pdf http://hdl.handle.net/10019.1/119902 en eng The Royal Entomological Society Janion, C., Worland, M.R. and Chown, S.L. (2009). Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island. Physiological Entomology, 34, 284-291 http://hdl.handle.net/10019.1/119902 Biological invasion cold hardiness functional homogenization macrophysiology relative abundance JournalArticles 2010 ftunstellenbosch 2021-08-31T00:09:54Z It is widely held both in the physiological literature, and more generally, that the average characteristics of species within an assemblage differ among sites. Such generalizations should be based on investigations of whole assemblages at sites, but this is rarely done. Here, such a study is undertaken for virtually the full assemblage of springtails found at sub-Antarctic Marion Island, by investigating supercooling points (SCPs) of 12 of the 16 species that occur there. Assemblage level variation tends to be less than that documented for assemblages across northern hemisphere sites but similar to that found at some Antarctic locations. Across this set of species, the mean SCPs of the indigenous species (mean ± SE =−17.2 ± 0.4 °C) do not differ significantly from that of the invasive species (−16.3 ± 0.7°C). Overall, the introduction of several species to the island does not appear to have led to functional homogenization (for this trait). By combining the assemblage-level SCP data with information on the abundances of the species in each of four major habitats, it is also shown that severe but uncommon low temperature events could substantially alter species relative abundances. By resetting assemblage trajectories, such events could play an important role in the terrestrial system at the island. Centre of Excellence for Invasion Biology Other/Unknown Material Antarc* Antarctic Marion Island Springtail Stellenbosch University: SUNScholar Research Repository Antarctic |
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collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
English |
topic |
Biological invasion cold hardiness functional homogenization macrophysiology relative abundance |
spellingShingle |
Biological invasion cold hardiness functional homogenization macrophysiology relative abundance Janion, C. Worland, M.R. Chown, S.L. Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
topic_facet |
Biological invasion cold hardiness functional homogenization macrophysiology relative abundance |
description |
It is widely held both in the physiological literature, and more generally, that the average characteristics of species within an assemblage differ among sites. Such generalizations should be based on investigations of whole assemblages at sites, but this is rarely done. Here, such a study is undertaken for virtually the full assemblage of springtails found at sub-Antarctic Marion Island, by investigating supercooling points (SCPs) of 12 of the 16 species that occur there. Assemblage level variation tends to be less than that documented for assemblages across northern hemisphere sites but similar to that found at some Antarctic locations. Across this set of species, the mean SCPs of the indigenous species (mean ± SE =−17.2 ± 0.4 °C) do not differ significantly from that of the invasive species (−16.3 ± 0.7°C). Overall, the introduction of several species to the island does not appear to have led to functional homogenization (for this trait). By combining the assemblage-level SCP data with information on the abundances of the species in each of four major habitats, it is also shown that severe but uncommon low temperature events could substantially alter species relative abundances. By resetting assemblage trajectories, such events could play an important role in the terrestrial system at the island. Centre of Excellence for Invasion Biology |
format |
Other/Unknown Material |
author |
Janion, C. Worland, M.R. Chown, S.L. |
author_facet |
Janion, C. Worland, M.R. Chown, S.L. |
author_sort |
Janion, C. |
title |
Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
title_short |
Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
title_full |
Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
title_fullStr |
Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
title_full_unstemmed |
Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island |
title_sort |
assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-antarctic marion island |
publisher |
The Royal Entomological Society |
publishDate |
2010 |
url |
http://hdl.handle.net/10019.1/119902 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Marion Island Springtail |
genre_facet |
Antarc* Antarctic Marion Island Springtail |
op_relation |
Janion, C., Worland, M.R. and Chown, S.L. (2009). Assemblage level variation in springtail lower lethal temperature: the role of invasive species on sub-Antarctic Marion Island. Physiological Entomology, 34, 284-291 http://hdl.handle.net/10019.1/119902 |
_version_ |
1766265218016477184 |