Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia.
On the sub-Antarctic island of South Georgia two species of predatory beetle, Trechisibus antarcticus and Oopterus soledadinus (Coleoptera, Carabidae), were accidentally introduced. The colonisation process offers unique opportunities for testing ecological hypotheses in the field. As a basis for su...
Published in: | Polar Biology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1999
|
Subjects: | |
Online Access: | https://research.vu.nl/en/publications/593267bc-6c0f-4225-9bc5-e03a81503be4 https://doi.org/10.1007/s003000050369 http://hdl.handle.net/1871.1/593267bc-6c0f-4225-9bc5-e03a81503be4 |
id |
ftvuamstcris:oai:research.vu.nl:publications/593267bc-6c0f-4225-9bc5-e03a81503be4 |
---|---|
record_format |
openpolar |
spelling |
ftvuamstcris:oai:research.vu.nl:publications/593267bc-6c0f-4225-9bc5-e03a81503be4 2023-05-15T14:02:21+02:00 Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. Brandjes, G.J. Block, W. Ernsting, G. 1999 https://research.vu.nl/en/publications/593267bc-6c0f-4225-9bc5-e03a81503be4 https://doi.org/10.1007/s003000050369 http://hdl.handle.net/1871.1/593267bc-6c0f-4225-9bc5-e03a81503be4 eng eng info:eu-repo/semantics/restrictedAccess Brandjes , G J , Block , W & Ernsting , G 1999 , ' Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. ' , Polar Biology , no. 21 , pp. 326-334 . https://doi.org/10.1007/s003000050369 article 1999 ftvuamstcris https://doi.org/10.1007/s003000050369 2022-01-17T13:15:41Z On the sub-Antarctic island of South Georgia two species of predatory beetle, Trechisibus antarcticus and Oopterus soledadinus (Coleoptera, Carabidae), were accidentally introduced. The colonisation process offers unique opportunities for testing ecological hypotheses in the field. As a basis for such studies, the spatial dynamics of the two species in the coastal lowland around Stromness Bay and Cumberland Bay were monitored during the period 1988-1996. Data are presented on the expansion of the two species and on the thermal characteristics of the tussock-forming grass Parodiochloa flabellata, which dominates the coastal lowlands. The largest expansion was shown by 7'. antarcticus, occurring as two populations in the Stromness Bay area. The origin of one of the populations, discovered in 1982, is Husvik Harbour, from where the species has colonised the central part of Stromness Bay. The second population, discovered in 1988 at Harbour Point, is invading the northern part of the area around Stromness Bay. Up to the present, three populations of O. soledadinus have been discovered. One population was found in 1988 at Husvik Harbour, co-existing with T. antarcticus, from where it is slowly expanding its distribution into the coastal zone. A second, very small, population of O. soledadinus was found in 1996 at Jason Harbour (Cumberland West Bay). The largest population of O. soledadinus, first reported in 1963, inhabits the area around Grytviken and King Edward Point (Cumberland East Bay), where it is the sole carabid species. The tussock grass vegetation offers a highly stable thermal environment compared with the more variable surroundings. Together with an ample food supply in the form of small arthropods and beetle larvae, and a vacant niche for arthropod predators, the benign microclimate of the tussock vegetation may explain the success of these predator introductions. Results of field observations on population parameters of the carabids, and laboratory measurement of egg production indicate the potential for large-scale co-existence. Article in Journal/Newspaper Antarc* Antarctic antarcticus Polar Biology Vrije Universiteit Amsterdam (VU): Research Portal Antarctic Cumberland Bay ENVELOPE(69.052,69.052,-48.781,-48.781) Cumberland East Bay ENVELOPE(-36.426,-36.426,-54.288,-54.288) Cumberland West Bay ENVELOPE(-36.584,-36.584,-54.237,-54.237) East Bay ENVELOPE(-36.426,-36.426,-54.288,-54.288) Grytviken ENVELOPE(-36.509,-36.509,-54.281,-54.281) Harbour Point ENVELOPE(-36.683,-36.683,-54.150,-54.150) Husvik Harbour ENVELOPE(-36.667,-36.667,-54.167,-54.167) Jason Harbour ENVELOPE(-36.581,-36.581,-54.196,-54.196) King Edward Point ENVELOPE(-36.496,-36.496,-54.284,-54.284) Stromness ENVELOPE(-36.716,-36.716,-54.156,-54.156) Stromness Bay ENVELOPE(-36.640,-36.640,-54.153,-54.153) West Bay ENVELOPE(-36.584,-36.584,-54.237,-54.237) Polar Biology 21 5 326 334 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
description |
On the sub-Antarctic island of South Georgia two species of predatory beetle, Trechisibus antarcticus and Oopterus soledadinus (Coleoptera, Carabidae), were accidentally introduced. The colonisation process offers unique opportunities for testing ecological hypotheses in the field. As a basis for such studies, the spatial dynamics of the two species in the coastal lowland around Stromness Bay and Cumberland Bay were monitored during the period 1988-1996. Data are presented on the expansion of the two species and on the thermal characteristics of the tussock-forming grass Parodiochloa flabellata, which dominates the coastal lowlands. The largest expansion was shown by 7'. antarcticus, occurring as two populations in the Stromness Bay area. The origin of one of the populations, discovered in 1982, is Husvik Harbour, from where the species has colonised the central part of Stromness Bay. The second population, discovered in 1988 at Harbour Point, is invading the northern part of the area around Stromness Bay. Up to the present, three populations of O. soledadinus have been discovered. One population was found in 1988 at Husvik Harbour, co-existing with T. antarcticus, from where it is slowly expanding its distribution into the coastal zone. A second, very small, population of O. soledadinus was found in 1996 at Jason Harbour (Cumberland West Bay). The largest population of O. soledadinus, first reported in 1963, inhabits the area around Grytviken and King Edward Point (Cumberland East Bay), where it is the sole carabid species. The tussock grass vegetation offers a highly stable thermal environment compared with the more variable surroundings. Together with an ample food supply in the form of small arthropods and beetle larvae, and a vacant niche for arthropod predators, the benign microclimate of the tussock vegetation may explain the success of these predator introductions. Results of field observations on population parameters of the carabids, and laboratory measurement of egg production indicate the potential for large-scale co-existence. |
format |
Article in Journal/Newspaper |
author |
Brandjes, G.J. Block, W. Ernsting, G. |
spellingShingle |
Brandjes, G.J. Block, W. Ernsting, G. Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
author_facet |
Brandjes, G.J. Block, W. Ernsting, G. |
author_sort |
Brandjes, G.J. |
title |
Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
title_short |
Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
title_full |
Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
title_fullStr |
Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
title_full_unstemmed |
Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. |
title_sort |
spatial dynamics of two introduced species of carabid beetles on the sub-antarctic island of south georgia. |
publishDate |
1999 |
url |
https://research.vu.nl/en/publications/593267bc-6c0f-4225-9bc5-e03a81503be4 https://doi.org/10.1007/s003000050369 http://hdl.handle.net/1871.1/593267bc-6c0f-4225-9bc5-e03a81503be4 |
long_lat |
ENVELOPE(69.052,69.052,-48.781,-48.781) ENVELOPE(-36.426,-36.426,-54.288,-54.288) ENVELOPE(-36.584,-36.584,-54.237,-54.237) ENVELOPE(-36.426,-36.426,-54.288,-54.288) ENVELOPE(-36.509,-36.509,-54.281,-54.281) ENVELOPE(-36.683,-36.683,-54.150,-54.150) ENVELOPE(-36.667,-36.667,-54.167,-54.167) ENVELOPE(-36.581,-36.581,-54.196,-54.196) ENVELOPE(-36.496,-36.496,-54.284,-54.284) ENVELOPE(-36.716,-36.716,-54.156,-54.156) ENVELOPE(-36.640,-36.640,-54.153,-54.153) ENVELOPE(-36.584,-36.584,-54.237,-54.237) |
geographic |
Antarctic Cumberland Bay Cumberland East Bay Cumberland West Bay East Bay Grytviken Harbour Point Husvik Harbour Jason Harbour King Edward Point Stromness Stromness Bay West Bay |
geographic_facet |
Antarctic Cumberland Bay Cumberland East Bay Cumberland West Bay East Bay Grytviken Harbour Point Husvik Harbour Jason Harbour King Edward Point Stromness Stromness Bay West Bay |
genre |
Antarc* Antarctic antarcticus Polar Biology |
genre_facet |
Antarc* Antarctic antarcticus Polar Biology |
op_source |
Brandjes , G J , Block , W & Ernsting , G 1999 , ' Spatial dynamics of two introduced species of carabid beetles on the sub-Antarctic island of South Georgia. ' , Polar Biology , no. 21 , pp. 326-334 . https://doi.org/10.1007/s003000050369 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s003000050369 |
container_title |
Polar Biology |
container_volume |
21 |
container_issue |
5 |
container_start_page |
326 |
op_container_end_page |
334 |
_version_ |
1766272592872734720 |