The diversity and biogeography of the Coleoptera of Churchill: insights from DNA barcoding
| Autor: | Henri Goulet, Sarah J. Adamowicz, Elizabeth E Boyle, Andrew B. T. Smith, Renee N Labbee, Robert E. Roughley, Tom Woodcock, Peter G. Kevan, Dirk Steinke |
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| Přispěvatelé: | University of Manitoba |
| Rok vydání: | 2013 |
| Předmět: |
0106 biological sciences
Species complex Biogeography Biodiversity Dytiscidae 010603 evolutionary biology 01 natural sciences DNA barcoding COI 03 medical and health sciences Freshwater Environmental Science(all) Animals DNA Barcoding Taxonomic Boreal-arctic transition Cytochrome c oxidase subunit I Ecology Evolution Behavior and Systematics Phylogeny 030304 developmental biology General Environmental Science Gene Library 0303 health sciences biology Ecology Arctic Regions Species diversity Manitoba Terrestrial 15. Life on land biology.organism_classification Barcode library Coleoptera Barcoding biotas Larva Guild Species richness Subarctic forest Research Article |
| Zdroj: | BMC Ecology |
| ISSN: | 1472-6785 |
| Popis: | Background Coleoptera is the most diverse order of insects (>300,000 described species), but its richness diminishes at increasing latitudes (e.g., ca. 7400 species recorded in Canada), particularly of phytophagous and detritivorous species. However, incomplete sampling of northern habitats and a lack of taxonomic study of some families limits our understanding of biodiversity patterns in the Coleoptera. We conducted an intensive biodiversity survey from 2006–2010 at Churchill, Manitoba, Canada in order to quantify beetle species diversity in this model region, and to prepare a barcode library of beetles for sub-arctic biodiversity and ecological research. We employed DNA barcoding to provide estimates of provisional species diversity, including for families currently lacking taxonomic expertise, and to examine the guild structure, habitat distribution, and biogeography of beetles in the Churchill region. Results We obtained DNA barcodes from 3203 specimens representing 302 species or provisional species (the latter quantitatively defined on the basis of Molecular Operational Taxonomic Units, MOTUs) in 31 families of Coleoptera. Of the 184 taxa identified to the level of a Linnaean species name, 170 (92.4%) corresponded to a single MOTU, four (2.2%) represented closely related sibling species pairs within a single MOTU, and ten (5.4%) were divided into two or more MOTUs suggestive of cryptic species. The most diverse families were the Dytiscidae (63 spp.), Staphylinidae (54 spp.), and Carabidae (52 spp.), although the accumulation curve for Staphylinidae suggests that considerable additional diversity remains to be sampled in this family. Most of the species present are predatory, with phytophagous, mycophagous, and saprophagous guilds being represented by fewer species. Most named species of Carabidae and Dytiscidae showed a significant bias toward open habitats (wet or dry). Forest habitats, particularly dry boreal forest, although limited in extent in the region, were undersampled. Conclusions We present an updated species list for this region as well as a species-level DNA barcode reference library. This resource will facilitate future work, such as biomonitoring and the study of the ecology and distribution of larvae. |
| Databáze: | OpenAIRE |
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