Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages ...

• Main Authors: Vindstad, Ole Petter L., Jepsen, Jane U., Yoccoz, Nigel G., Bjornstad, Ottar N., Mesquita, Michel D.S., Ims, Rolf A.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: population cycle; Betula pubescens var. pumila; Betula pubescens; ballooning; Epirrita autumnata; dispersal barrier; Operophtera brumata; travelling wave; wind-driven dispersal; inter-species comparison; Arctic; Norway; Northern Norway
• Online Access: https://dx.doi.org/10.5061/dryad.kb4867v; https://datadryad.org/stash/dataset/doi:10.5061/dryad.kb4867v

1. Spatial synchrony in population dynamics can be caused by dispersal or spatially correlated variation in environmental factors like weather (Moran effect). Distinguishing between these mechanisms is challenging for natural populations, and the study of dispersal-induced synchrony in particular has been dominated by theoretical modelling and laboratory experiments. 2. The goal of the present study was to evaluate the evidence for dispersal as a cause of meso-scale (distances of tens of kilometers) spatial synchrony in natural populations of the two cyclic geometrid moths Epirrita autumnata and Operophtera brumata in sub-arctic mountain birch forest in northern Norway. 3. To infer the role of dispersal in geometrid synchrony, we applied three complementary approaches, namely estimating the effect of design-based dispersal barriers (open sea) on synchrony, comparing the strength of synchrony between E. autumnata (winged adults) and the less dispersive O. brumata (wingless adult females), and relating the ... : Geometrid larval density dataData on the density of Epirrita autumnata and Operophtera brumata larvae on mountain birch for 120 sampling stations in northwest Norway during 1999-2017.Larvae.csvCoordinates for larval sampling stationsUTM coordinates for 120 sampling stations used to estimate the density of Epirrita autumnata and Operophtera brumata larvae in northwest Norway during 1999-2017.Coordinates.csvData on wind speeds and wind directionsData on wind speeds and wind directions for 1998-2017 for a 50*80 Km box covering the study region in northwest Norway.Wind.csv ...