The diet and impact of house mice on a sub-Antarctic island

Smith, V. R.; Avenant, Nico L.; Chown, Steven L.

doi:10.1007/s00300-002-0405-8

Cited by 92 publications

(95 citation statements)

References 23 publications

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“…The impacts of house mice on sub-Antarctic plants and invertebrates are well documented (Gleeson & van Rensburg, 1982 ;Copson, 1986;Chown & Smith, 1993 ;Le Roux et al, 2002 ;Smith, Avenant & Chown, 2002), including direct reductions in population sizes and effects on the life-history traits (Crafford & Scholtz, 1987 ;Chown & Smith, 1993 ;Le Roux et al, 2002). Huyser, Ryan & Cooper (2000) suggested that, on Marion Island, house mice indirectly affect lesser sheathbills (Chionis minor) by reducing the numbers of invertebrates available to them (their major prey during winter).…”

Section: ) Vertebratesmentioning

confidence: 99%

Biological invasions in the Antarctic: extent, impacts and implications

Frénot

Chown

Whinam³

et al. 2005

Biol. Rev.

606

822

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Alien microbes, fungi, plants and animals occur on most of the sub-Antarctic islands and some parts of the Antarctic continent. These have arrived over approximately the last two centuries, coincident with human activity in the region. Introduction routes have varied, but are largely associated with movement of people and cargo in connection with industrial, national scientific program and tourist operations. The large majority of aliens are European in origin. They have both direct and indirect impacts on the functioning of speciespoor Antarctic ecosystems, in particular including substantial loss of local biodiversity and changes to ecosystem processes. With rapid climate change occurring in some parts of Antarctica, elevated numbers of introductions and enhanced success of colonization by aliens are likely, with consequent increases in impacts on ecosystems. Mitigation measures that will substantially reduce the risk of introductions to Antarctica and the sub-Antarctic must focus on reducing propagule loads on humans, and their food, cargo, and transport vessels.

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Section: ) Vertebratesmentioning

confidence: 99%

Biological invasions in the Antarctic: extent, impacts and implications

Frénot

Chown

Whinam³

et al. 2005

Biol. Rev.

606

822

View full text Add to dashboard Cite

show abstract

“…This study is concerned with five weevil species (Coleoptera: Curculionidae: Ectemnorhinus group), which play significant roles in the island systems and have been the focus of previous work on changes in body size as a consequence of invasion (Chown & Smith, 1993). We build on this early work using a dataset that extends now to 24 years (though with sampling during specific years, rather than annually), covering a period of considerable change in temperature, and in impacts on the species by the invasive mice on Marion Island (Smith et al, 2002). In this context it is important to understand differences among the weevil species in habitat use and predation by mice.…”

Section: Study Area and Speciesmentioning

confidence: 99%

“…In this context it is important to understand differences among the weevil species in habitat use and predation by mice. Ectemnorhinus marioni is restricted to vegetated areas in the lowlands or mosses at higher altitudes and is the preferred weevil prey species of mice (Chown & Smith, 1993;Smith et al, 2002). Bothrometopus randi is a coastal, rock face dwelling species that is also consumed by mice, as is the eurytopic Bothrometopus parvulus (sensu lato; Chown & Smith, 1993;Smith et al, 2002).…”

Section: Study Area and Speciesmentioning

confidence: 99%

“…Ectemnorhinus marioni is restricted to vegetated areas in the lowlands or mosses at higher altitudes and is the preferred weevil prey species of mice (Chown & Smith, 1993;Smith et al, 2002). Bothrometopus randi is a coastal, rock face dwelling species that is also consumed by mice, as is the eurytopic Bothrometopus parvulus (sensu lato; Chown & Smith, 1993;Smith et al, 2002). However, because mice are most abundant in vegetated areas and less commonly use rock face and fellfield areas typically occupied by the latter species, it is less commonly encountered in mouse gut contents and is thought to be less commonly consumed (Chown & Smith, 1993;Smith et al, 2002).…”

Section: Study Area and Speciesmentioning

confidence: 99%

“…We use a long-term body size data set on five species of closely related weevils (Coleoptera: Curculionidae: Ectemnorhinus group) from two colocated (19 km distant) sub-Antarctic islands, of which one has been invaded by house mice. Previous work on the life cycle and body size of these species as well as on predation by house mice has shown that the temperature size rule and an altitudinal Bergmann's rule are found in species that occur across the elevational range (given an effectively year-round growing season), and that weevils in many habitats are the preferred prey of mice, which also select larger-bodied individuals (Chown & Smith, 1993;Smith et al, 2002;Chown & Klok, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Antagonistic effects of biological invasion and temperature change on body size of island ectotherms

Treasure

Chown

2013

Diversity and Distributions

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Aim Despite their potentially profound consequences, little is known about the impacts of interactions among environmental change drivers on indigenous species. For biological invasions, much theoretical prominence has been given to additive or synergistic interactions with temperature change. However, empirical investigations are sparse. Here, we investigate the outcomes of interactions between temperature change and biological invasions on ectotherm body size in a temperate system. Location The sub‐Antarctic Prince Edward Island group (46°54′ S, 37°45′ E). Methods We use long‐term (24 years) body size data on weevil species from Marion and Prince Edward Islands. Invasive house mice, which prey on four of the five weevil species, are present on Marion Island, while the neighbouring Prince Edward Island is mouse free. Theory predicts that with higher temperatures, body size should decline across all species, and previous work suggests that size‐selective predation by mice should enhance this effect on the invaded island. Generalized linear models were used to determine the relative effects of sex, island, altitude and mean annual temperature on body size for each of the species. Results Temperature change and biological invasions interact to affect body size in an antagonistic fashion. In weevil species not preyed on by invasive house mice, body size and declining size with increasing temperature are consistent across adjacent invaded and non‐invaded islands. By contrast, species preyed on by mice are smaller on the invaded island and show opposite size‐temperature relationships on the invaded and mouse‐free islands. Main conclusions Size declines on the non‐invaded island are in keeping with theoretical expectations of declining size with increasing temperatures. By contrast, this expectation is not met on the island invaded by mice, largely owing to what appears to be increased energetic demand of predators in colder years. These results emphasize that interactions among change drivers will take a range of forms, and that humans may have substantial influences on fundamental ecological patterns.

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Tropical Island Recovery

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The diet and impact of house mice on a sub-Antarctic island

Cited by 92 publications

References 23 publications

Biological invasions in the Antarctic: extent, impacts and implications

Biological invasions in the Antarctic: extent, impacts and implications

Antagonistic effects of biological invasion and temperature change on body size of island ectotherms

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