The Rediscovery of Stictotarsus minipi larson (Insecta: Coleoptera: Dytiscidae) in Lake Athabasca, Saskatchewan

Hooper, Ronald R.

doi:10.29173/bluejay323

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“…In total, we collected 11 632 carabids representing 39 species (Supplementary Appendix 1). All species collected on the islands were previously known from Saskatchewan (Hooper and Larson 2012; Bousquet et al . 2013), except Pterostichus brevicornis (Kirby).…”

Section: Resultsmentioning

confidence: 99%

Boreal ground-beetle (Coleoptera: Carabidae) assemblages of the mainland and islands in Lac la Ronge, Saskatchewan, Canada

et al. 2017

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We tested the applicability of the “passive sampling” hypothesis and theory of island biogeography (TIB) for explaining the diversity of forest-dwelling carabid assemblages (Carabidae: Coleoptera) on 30 forested islands (0.2–980.7 ha) in Lac la Ronge and the adjacent mainland in Saskatchewan, Canada. Species richness per unit area increased with distance to mainland with diversity being highest on the most isolated islands. We detected neither a positive species-area relationship, nor significant differences in species richness among island size classes, or between islands and the mainland. Nonetheless, carabid assemblages distinctly differed on islands <1 ha in area and gradually approached the structure of mainland assemblages as island area increased. Small islands were characterised by abundant populations of small-bodied, winged species and few if any large-bodied, flightless species like Carabus taedatus Fabricius. Our findings suggest that neither the “passive sampling” hypothesis nor the theory of island biogeography adequately explain carabid beetle diversity patterns observed among islands in Lac la Ronge. Instead, we hypothesise that population processes such as higher extinction rates of large-bodied, flightless species and the associated release of smaller-bodied, flying species from intra-guild predation on small islands contribute to observed differences in the structure of carabid assemblages between islands.

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Section: Resultsmentioning

confidence: 99%

Boreal ground-beetle (Coleoptera: Carabidae) assemblages of the mainland and islands in Lac la Ronge, Saskatchewan, Canada

et al. 2017

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“…His study of grassland arthropod diversity over the past 20 years has produced many new records and a wealth of collected material, but recent additions to the list are so far unpublished. Larson’s working dataset updating the checklist of Saskatchewan Coleoptera (D. Larson, personal communication) lists about 2700 species, which dramatically increases the number of known species for Saskatchewan (compare to 2312 species in Hooper and Larson (2012) and 2679 species in Bousquet et al . (2013)).…”

Section: Introductionmentioning

confidence: 99%

Arthropods of Canadian grasslands: a retrospective of a 40-year project of the Biological Survey of Canada

et al. 2017

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The Rediscovery of Stictotarsus minipi larson (Insecta: Coleoptera: Dytiscidae) in Lake Athabasca, Saskatchewan

Cited by 2 publications

References 0 publications

Boreal ground-beetle (Coleoptera: Carabidae) assemblages of the mainland and islands in Lac la Ronge, Saskatchewan, Canada

Boreal ground-beetle (Coleoptera: Carabidae) assemblages of the mainland and islands in Lac la Ronge, Saskatchewan, Canada

Arthropods of Canadian grasslands: a retrospective of a 40-year project of the Biological Survey of Canada

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