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Dispersal variability and associated population-level consequences in tree-killing bark beetles

Kautz, Markus; Imron, Muhammad Ali; Dworschak, Kai; Schopf, Reinhard

Background: Dispersal is a key process in the response of insect populations to rapidly changing environmental conditions. Variability among individuals, regarding the timing of dispersal initiation and travelled distance from source, is assumed to contribute to increased population success through risk spreading. However, experiments are often limited in studying complex dispersal interactions over space and time. By applying a local-scaled individual-based simulation model we studied dispersal and emerging infestation patterns in a host − bark beetle system (Picea abies – Ips typgraphus). More specifically, we (i) investigated the effect of individual variability in beetle physiology (flight capacity) and environmental heterogeneity (host susceptibility level) on population-level dispersal success, and (ii) elucidated patterns of spatial and/or temporal variability in individual dispersal success, host selectivity, and the resulting beetle density within colonized hosts in differently susceptible environments.
Results: Individual variability in flight capacity of bark beetles causes predominantly positive effects on population-le ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1186/s40462-016-0074-9
ISSN: 2051-3933
URN: urn:nbn:de:swb:90-619525
KITopen ID: 1000061952
HGF-Programm 12.02.02; LK 01
Erschienen in Movement Ecology
Band 4
Heft 1
Seiten 9
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagworte Dispersal mortality, European spruce bark beetle, Foraging, Host selection, Individual-based modelling, IPS-model, Movement ecology, Pioneering, Population plasticity, Risk spreading
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