Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages
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 ha...
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ftdryad:oai:v1.datadryad.org:10255/dryad.204275 2023-05-15T14:26:26+02:00 Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages Vindstad, Ole Petter L. Jepsen, Jane U. Yoccoz, Nigel G. Bjornstad, Ottar N. Mesquita, Michel D.S. Ims, Rolf A. Northwest Norway 2019-02-28T21:12:15Z http://hdl.handle.net/10255/dryad.204275 https://doi.org/10.5061/dryad.kb4867v unknown doi:10.5061/dryad.kb4867v/1 doi:10.5061/dryad.kb4867v/2 doi:10.5061/dryad.kb4867v/3 doi:10.1111/1365-2656.12959 doi:10.5061/dryad.kb4867v Vindstad OPL, Jepsen JU, Yoccoz NG, Bjørnstad ON, Mesquita MDS, Ims RA (2019) Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages. Journal of Animal Ecology. http://hdl.handle.net/10255/dryad.204275 wind-driven dispersal ballooning dispersal barrier inter-species comparison population cycle travelling wave Article 2019 ftdryad https://doi.org/10.5061/dryad.kb4867v https://doi.org/10.5061/dryad.kb4867v/1 https://doi.org/10.5061/dryad.kb4867v/2 https://doi.org/10.5061/dryad.kb4867v/3 https://doi.org/10.1111/1365-2656.12959 2020-01-01T16:22:08Z 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 directionality (anisotropy) of synchrony to the predominant wind directions during spring, when geometrid larvae engage in windborne dispersal (ballooning). 4. The estimated effect of dispersal barriers on synchrony was almost three times stronger for the less dispersive O. brumata than E. autumnata. Inter-site synchrony was also weakest for O. brumata at all spatial lags. Both observations argue for adult dispersal as an important synchronizing mechanism at the spatial scales considered. Further, synchrony in both moth species showed distinct anisotropy and was most spatially extensive parallel to the east-west axis, coinciding closely with the overall dominant wind direction. This argues for a synchronizing effect of windborne larval dispersal. Congruent with most extensive dispersal along the east-west axis, E. autumnata also showed evidence for a travelling wave moving southwards at a speed of 50-80 km/year. 5. Our results suggest that dispersal processes can leave clear signatures in both the strength and directionality of synchrony in field populations, and highlight wind-driven dispersal as promising avenue for further research on spatial synchrony in natural insect populations. Article in Journal/Newspaper Arctic Arctic Northern Norway Dryad Digital Repository (Duke University) Arctic Norway |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
wind-driven dispersal ballooning dispersal barrier inter-species comparison population cycle travelling wave |
spellingShingle |
wind-driven dispersal ballooning dispersal barrier inter-species comparison population cycle travelling wave Vindstad, Ole Petter L. Jepsen, Jane U. Yoccoz, Nigel G. Bjornstad, Ottar N. Mesquita, Michel D.S. Ims, Rolf A. Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
topic_facet |
wind-driven dispersal ballooning dispersal barrier inter-species comparison population cycle travelling wave |
description |
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 directionality (anisotropy) of synchrony to the predominant wind directions during spring, when geometrid larvae engage in windborne dispersal (ballooning). 4. The estimated effect of dispersal barriers on synchrony was almost three times stronger for the less dispersive O. brumata than E. autumnata. Inter-site synchrony was also weakest for O. brumata at all spatial lags. Both observations argue for adult dispersal as an important synchronizing mechanism at the spatial scales considered. Further, synchrony in both moth species showed distinct anisotropy and was most spatially extensive parallel to the east-west axis, coinciding closely with the overall dominant wind direction. This argues for a synchronizing effect of windborne larval dispersal. Congruent with most extensive dispersal along the east-west axis, E. autumnata also showed evidence for a travelling wave moving southwards at a speed of 50-80 km/year. 5. Our results suggest that dispersal processes can leave clear signatures in both the strength and directionality of synchrony in field populations, and highlight wind-driven dispersal as promising avenue for further research on spatial synchrony in natural insect populations. |
format |
Article in Journal/Newspaper |
author |
Vindstad, Ole Petter L. Jepsen, Jane U. Yoccoz, Nigel G. Bjornstad, Ottar N. Mesquita, Michel D.S. Ims, Rolf A. |
author_facet |
Vindstad, Ole Petter L. Jepsen, Jane U. Yoccoz, Nigel G. Bjornstad, Ottar N. Mesquita, Michel D.S. Ims, Rolf A. |
author_sort |
Vindstad, Ole Petter L. |
title |
Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
title_short |
Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
title_full |
Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
title_fullStr |
Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
title_full_unstemmed |
Data from: Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
title_sort |
data from: spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages |
publishDate |
2019 |
url |
http://hdl.handle.net/10255/dryad.204275 https://doi.org/10.5061/dryad.kb4867v |
op_coverage |
Northwest Norway |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Arctic Northern Norway |
genre_facet |
Arctic Arctic Northern Norway |
op_relation |
doi:10.5061/dryad.kb4867v/1 doi:10.5061/dryad.kb4867v/2 doi:10.5061/dryad.kb4867v/3 doi:10.1111/1365-2656.12959 doi:10.5061/dryad.kb4867v Vindstad OPL, Jepsen JU, Yoccoz NG, Bjørnstad ON, Mesquita MDS, Ims RA (2019) Spatial synchrony in sub-arctic geometrid moth outbreaks reflects dispersal in larval and adult lifecycle stages. Journal of Animal Ecology. http://hdl.handle.net/10255/dryad.204275 |
op_doi |
https://doi.org/10.5061/dryad.kb4867v https://doi.org/10.5061/dryad.kb4867v/1 https://doi.org/10.5061/dryad.kb4867v/2 https://doi.org/10.5061/dryad.kb4867v/3 https://doi.org/10.1111/1365-2656.12959 |
_version_ |
1766299006053384192 |