<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Gerber, Esther</dc:creator>
  <dc:creator>Hinz, Hariet L.</dc:creator>
  <dc:creator>Blossey, Bernd</dc:creator>
  <dc:creator>Bacher, Sven</dc:creator>
  <dc:date>2012</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">A combination of observational and experimental methods, in both the laboratory and  field, were used to assess niche partitioning between Ceutorhynchus alliariae Brisout  and C. roberti Gyllenhal (Coleoptera: Curculionidae), two coexisting shoot-boring  weevils on garlic mustard, Alliaria petiolata (M. Bieb.) Cavara and Grande  (Brassicaceae). We compared their morphology, oviposition behavior, larval  development, distribution, abundance, and attack rates in their sympatric range, and  of C. alliariae when found alone and in sympatry with C. roberti. Results indicate only  very small differences in the fundamental niches of the two species. Comparison of C.  alliariae in the range it occurs alone with the range where it co-occurs with C. roberti  revealed some evidence for competition between the two species, i.e., attack levels of  C. alliariae were reduced in areas where it co-occurred with C. roberti. However, the  study showed no character displacement in regard to adult size or shoot choice of C.  alliariae and we found no indication for superiority of either of the two species. Clearly,  manipulative experiments would be necessary to unambiguously test for competition  between the two species. Our results, based on a subset of niche dimensions known  to be important in other systems, suggest that C. alliariae and C. roberti may present  one of the rare cases, in which niche differentiation is not the main mechanism  underlying coexistence.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://folia.unifr.ch/global/documents/302834</dc:identifier>
  <dc:identifier>https://folia.unifr.ch/documents/302834/files/ee41-1086.pdf</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1603/EN11335</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>License undefined</dc:rights>
  <dc:source>Environmental Entomology. - 2012, vol. 41, no. 5, p. 1086-1096</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">Ceutorhynchus alliariae</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">Ceutorhynchus roberti</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">niche partitioning</dc:subject>
  <dc:subject xmlns:ns4="xml" ns4:lang="en">niche overlap</dc:subject>
  <dc:subject xmlns:ns5="xml" ns5:lang="en">competitive coexistence</dc:subject>
  <dc:subject>info:eu-repo/classification/udc/57</dc:subject>
  <dc:title xmlns:ns6="xml" ns6:lang="en">Two shoot-Miners, Ceutorhynchus alliariae and Ceutorhynchus roberti, sharing the same fundamental niche on garlic mustard</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>