caa a22 4500 606193707 CHVBK 20210128100910.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10682-015-9755-x doi (NATIONALLICENCE)springer-10.1007/s10682-015-9755-x Latitudinal differences in diapause related photoperiodic responses of European Colorado potato beetles ( Leptinotarsa decemlineata ) [Elektronische Daten] [Philipp Lehmann, Anne Lyytinen, Saija Piiroinen, Leena Lindström] Many organisms use photoperiodic cues to assess seasonal progression and pace their phenology. As photoperiod correlates with latitude, range expansions in seasonal environments may require re-synchronization of phenology and life-history traits with novel season length. Adaptive resynchronization takes time, and hence might be one factor explaining why range expansion to higher latitudes often is slow. Studies investigating latitudinal clines in photoperiodic traits often focus on species or populations which are well established. However, studying organisms which are in the process of expanding their range can provide valuable information on the evolutionary ecological mechanisms driving the adaptive synchronization to seasonal environments. The Colorado potato beetle, Leptinotarsa decemlineata, is a pest of potato, which rapidly has spread towards higher latitudes. We studied whether beetles from six European populations along a latitudinal axis are synchronized with their local photoperiodic environmental conditions. Variation in critical photoperiod (when 50% of individuals make the decision to overwinter), diapause incidence, burrowing age for diapause and resurfacing behaviour were investigated by maintaining beetles under six photoperiods. The beetles showed a clear latitudinal pattern in diapause incidence and burrowing age for diapause but not in critical photoperiod. Resurfacing behaviour of burrowed beetles increased with the length of the photoperiod, which through unsynchronized overwintering behaviour could lead to high overwintering mortality. Thus, while synchronization of diapause preparation with local photoperiodic conditions can be one reason explaining the success of L. decemlineata in expanding to higher latitudes, further northward range expansion could be constrained by inherent difficulties to initiate overwintering under very long photoperiods. Springer International Publishing Switzerland, 2015 Coleoptera nationallicence Invasion nationallicence Local adaptation nationallicence Phenology nationallicence Rapid adaptation nationallicence Temperate species nationallicence Lehmann Philipp Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Lyytinen Anne Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Piiroinen Saija Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Lindström Leena Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut Evolutionary Ecology Springer International Publishing 29/2(2015-03-01), 269-282 0269-7653 29:2<269 2015 29 10682 https://doi.org/10.1007/s10682-015-9755-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10682-015-9755-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lehmann Philipp Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Lyytinen Anne Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Piiroinen Saija Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 700 1- Lindström Leena Department of Biological and Environmental Science, Centre of Excellence in Biological Interactions, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland aut NATIONALLICENCE 773 0- Evolutionary Ecology Springer International Publishing 29/2(2015-03-01), 269-282 0269-7653 29:2<269 2015 29 10682