Recent range expansions in non-native predatory beetles on sub-Antarctic South Georgia

Convey, Peter; Key, R. S.; Key, R.J.D.; Belchier, Mark; Waller, Catherine

doi:10.1007/s00300-010-0909-6

Cited by 32 publications

(22 citation statements)

References 24 publications

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“…The extent of its invasion in South Georgia remains limited compared to the Kerguelen Islands, with much smaller populations (Convey et al 2011;Lebouvier et al 2011). Most likely reasons for this lower invasive success are (i) the presence of Trechisibus antarcticus Dejean (Col., Carabidae), another invasive predaceous ground beetle whereas M. soledadinus suffers no competition in the Kerguelen Islands, and (ii) harsher climate (Convey et al 2011;Lebouvier et al 2011). It has been hypothesized that greater invasive success of T.…”

Section: Invasion Risks: the Relevance Of M Soledadinus' Thermal Tolmentioning

confidence: 99%

“…To date, six insect species are invasive in the Kerguelen Islands, five of them being cosmopolitan species with widespread worldwide range or temperate origin (Frenot et al 2005). So far, only the ground beetle Merizodus soledadinus Guérin-Méneville (Col., Carabidae) originates from a native area restricted to about the same latitude as the Kerguelen Islands, in the cold southern temperate area (Patagonia, Tierra del Fuego and Falkland Islands;Jeannel 1940;Johns 1974;Chevrier 1996;Roig-Junent and Dominguez 2001;Convey et al 2011). In the recipient environment, this flightless predaceous insect has encountered biotic (prey communities and their distribution) and abiotic conditions (cooler temperatures) that differ from its native area.…”

Section: Introductionmentioning

confidence: 99%

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Physiological responses to temperature in Merizodus soledadinus (Col., Carabidae), a subpolar carabid beetle invading sub-Antarctic islands

Laparie¹,

Renault

2014

Polar Biol

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Recent human activities and rising air temperature have increased the vulnerability of sub-Antarctic islands to alien species. At the Kerguelen Islands, the predaceous ground beetle Merizodus soledadinus is the only invasive insect originating from the southern cold temperate area (native from Patagonia, Tierra del Fuego and Falkland Islands). This austral origin raises the question of the limits of its physiological tolerance and capability to withstand (i) global change and (ii) warmer climates of archipelagos where its accidental transportation could be facilitated from the Kerguelen Islands (namely Amsterdam & Saint Paul). Using GC-MS metabolomics, we compared metabotypes of adults exposed to different temperatures (0, 4, 8, 12, 16, 20° C). All individuals survived after two weeks regardless of the temperature they were exposed to. The physiological changes observed were consistent with increased metabolic rate at increased temperatures, without extreme metabotypes that are characteristic of acute stress. First cues of sub-lethal stress were observed after prolonged exposure to 20° C, a warm regime unrealistic for such duration in sub-Antarctic Islands. Overall, M. soledadinus' thermal tolerance exceeded temperatures currently experienced in nature, suggesting that climate warming may boost its invasion by eliciting its activity and broadening habitat suitability in both invaded and still pristine islands. This thermal tolerance may allow survival aboard ships and development in sub-Antarctic islands with conditions warmer than the Kerguelen Islands, such as Amsterdam & St Paul. Stringent biosecurity measures are thus needed to prevent transfer from Kerguelen to these islands. The native range of this predaceous beetle limited to the Falkland Islands and southernmost South America may be partly constrained by factors other than temperature, such as desiccation, predation or competition.

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Section: Invasion Risks: the Relevance Of M Soledadinus' Thermal Tolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physiological responses to temperature in Merizodus soledadinus (Col., Carabidae), a subpolar carabid beetle invading sub-Antarctic islands

Laparie¹,

Renault

2014

Polar Biol

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“…At a local level, the regional warming of South Georgia has already brought about changes to terrestrial and marine ecology, bird distribution Forcada & Trathan, 2009;Convey et al, 2011;Richardson et al, 2012;Morley et al, 2014; among many others), and seasonal snow cover and glacier extent (Gordon & Timmis, 1992;Gordon et al, 2008;Cook et al, 2010). Likewise, introduced flora and fauna (accidently and/or deliberately) has already profoundly damaged the natural ecosystem of the island (Frenot et al, 2005;SGHT, 2014).…”

Section: Species Reductionmentioning

confidence: 99%

Föhn winds on South Georgia and their impact on regional climate

Bannister

King

2015

Weather

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South Georgia is a small and mountainous island, located in the remote Southern Ocean. The island's subantarctic climate is controlled by its location and steep orography; with 19 peaks over 2000m and situated within a belt of strong westerly winds South Georgia acts as an effective barrier to the winds that impinge upon it.Since the 1920s, average summer temperatures have risen by ~1 o C on South Georgia.Coupled with this has been an increase in the rate of glacial retreat throughout the last century, with glaciers on the northeast leeside of the island retreating at a faster rate than those on the southwest side. These asymmetrical changes are thought to be linked with the strengthening of the westerlies. If the strength of the westerlies is sufficient, downslope winds can develop on the leeside of the island causing significant temperature increases as the descending air warms adiabatically; this is known as the föhn effect. Therefore, the aim of this thesis is to investigate whether the observed asymmetric pattern of regional warming and glacier retreat are caused by the föhn warming process.To explore the link between the föhn effect and its impact on the regional climate of

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“…This is in contrast with the maritime Antarctic, where alien species, such as the carabid beetle (Merizodus soledadinus [Guerin-Meneville, 1830]), may have dramatic effects on the native flora and fauna (Convey et al 2011;Greenslade & Convey 2012;Hidalgo et al 2013). The relatively scarcity of alien species in Svalbard could possibly be a result of the greater connectivity in the Arctic, where extensive regions of continent and numerous islands facilitate natural dispersal.…”

Section: Resultsmentioning

confidence: 60%

The alien terrestrial invertebrate fauna of the High Arctic archipelago of Svalbard: potential implications for the native flora and fauna

Coulson¹

2015

Polar Research

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Recent range expansions in non-native predatory beetles on sub-Antarctic South Georgia

Cited by 32 publications

References 24 publications

Physiological responses to temperature in Merizodus soledadinus (Col., Carabidae), a subpolar carabid beetle invading sub-Antarctic islands

Physiological responses to temperature in Merizodus soledadinus (Col., Carabidae), a subpolar carabid beetle invading sub-Antarctic islands

Föhn winds on South Georgia and their impact on regional climate

The alien terrestrial invertebrate fauna of the High Arctic archipelago of Svalbard: potential implications for the native flora and fauna

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