Title Recent range expansions in non-native predatory beetles on sub-antarctic South Georgia
Author Convey, P.; Key, R.S.; Key, R.J.D.; Belchier, M.; Waller, C.L.
Author Affil Convey, P., British Antarctic Survey, Cambridge, United Kingdom. Other: Natural England, United Kingdom
Source Polar Biology, 34(4), p.597-602. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Apr. 2011
Notes In English. Supplemental information/data is available in the online version of this article. 31 refs. GeoRef Acc. No: 309626
Index Terms Atlantic Ocean Islands--South Georgia; Arthropoda; Atlantic Ocean Islands; behavior; biogeography; diet; ecology; feeding; habitat; Insecta; Invertebrata; Mandibulata; predation; predators; Scotia Sea Islands; South Georgia; subantarctic regions
Abstract The human-assisted establishment of two nonnative predatory carabid beetles (Merizodus soledadinus (Guerin-Meneville), Trechisibus antarcticus (Dejean)) on the sub- Antarctic island of South Georgia occurred 30- 50 years ago, but the distribution of these species has never been the subject of regular monitoring, and was last assessed in the mid- 1990s. Based on opportunistic collection records and directed Weld survey activities on South Georgia over four summer seasons between 2002/3 and 2008/9, we describe recent and important range expansions in both species on the island. The new distributional ranges of both species are highly suggestive of a continuing inadvertent human role in transferring them across the obstructions presented by tidewater glaciers or higher- altitude mountain passes. Both species now have the potential to spread unchecked by any other geographical obstructions across a large section of the north-east coast of the island and are likely to have considerable negative impacts on the elements of the native (including endemic) terrestrial invertebrate fauna.
URL http://hdl.handle.net/10.1007/s00300-010-0909-6
Publication Type journal article
Record ID 91419