Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest
Accepted manuscript version. Published version available at https://doi.org/10.1111/een.12400 1. Population dynamics and interactions that vary over a species’ range are of particular importance in the context of latitudinal clines in biological diversity.Winter moth (Operophtera brumata) and autumn...
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Online Access: | https://hdl.handle.net/10037/12218 https://doi.org/10.1111/een.12400 |
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ftunivtroemsoe:oai:munin.uit.no:10037/12218 2023-05-15T14:27:45+02:00 Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest Pepi, Adam A. Vindstad, Ole Petter Laksforsmo Ek, Malin Jepsen, Jane Uhd 2017-04-03 https://hdl.handle.net/10037/12218 https://doi.org/10.1111/een.12400 eng eng Ecological Entomology info:eu-repo/grantAgreement/RCN/KLIMAFORSK — Stort program klima/244454/NORWAY/What comes after the new pest? Ecosystem transitions following insect pest outbreaks induced by climate change in the European high North// Pepi, A. A., Vindstad, O. P. L., Ek, M., Jepsen, J. U. (2017). "Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest", Ecological Entomology, Volume 42, Issue 4, August 2017, Pages 430–438. FRIDAID 1464088 doi:10.1111/een.12400 0307-6946 1365-2311 https://hdl.handle.net/10037/12218 openAccess VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Ecosystem exploitation hypothesis Fennoscandia generalist predators Norway predator exclusion pupal predation top-down control Journal article Tidsskriftartikkel Peer reviewed 2017 ftunivtroemsoe https://doi.org/10.1111/een.12400 2021-06-25T17:55:13Z Accepted manuscript version. Published version available at https://doi.org/10.1111/een.12400 1. Population dynamics and interactions that vary over a species’ range are of particular importance in the context of latitudinal clines in biological diversity.Winter moth (Operophtera brumata) and autumnal moth (Epirrita autumnata) are two species of eruptive geometrids that vary widely in outbreak tendency over their range, which generally increases from south to north and with elevation. 2. The predation pressure on geometrid larvae and pupae over an elevational gradient was tested. The effects of background larval density and bird occupancy of monitoring nest boxes on predation rates were also tested. Predation on larvae was tested through exclusion treatments at 20 replicate stations over four elevations at one site, while pupae were set out to measure predation at two elevations at three sites. 3. Larval densities were reduced by bird predation at three lower elevations, but not at the highest elevation, and predation rates were 1.9 times higher at the lowest elevation than at the highest elevation. The rate of predation on larvae was not related to background larval density or nest box occupancy, although there were more eggs and chicks at the lowest elevation. Therewere no consistent differences in predation on pupae by elevation. 4. These results suggest that elevational variation in avian predation pressure on larvae may help to drive elevational differences in outbreak tendency, and that birds may play a more important role in geometrid population dynamics than the focus on invertebrate and soil predators of previous work would suggest. Ecosystem exploitation hypothesis, Fennoscandia, generalist predators, Norway, predator exclusion, pupal predation, top-down control. Article in Journal/Newspaper Arctic Arctic Fennoscandia University of Tromsø: Munin Open Research Archive Arctic Norway Ecological Entomology 42 4 430 438 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Ecosystem exploitation hypothesis Fennoscandia generalist predators Norway predator exclusion pupal predation top-down control |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Ecosystem exploitation hypothesis Fennoscandia generalist predators Norway predator exclusion pupal predation top-down control Pepi, Adam A. Vindstad, Ole Petter Laksforsmo Ek, Malin Jepsen, Jane Uhd Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Basale biofag: 470 VDP::Mathematics and natural scienses: 400::Basic biosciences: 470 Ecosystem exploitation hypothesis Fennoscandia generalist predators Norway predator exclusion pupal predation top-down control |
description |
Accepted manuscript version. Published version available at https://doi.org/10.1111/een.12400 1. Population dynamics and interactions that vary over a species’ range are of particular importance in the context of latitudinal clines in biological diversity.Winter moth (Operophtera brumata) and autumnal moth (Epirrita autumnata) are two species of eruptive geometrids that vary widely in outbreak tendency over their range, which generally increases from south to north and with elevation. 2. The predation pressure on geometrid larvae and pupae over an elevational gradient was tested. The effects of background larval density and bird occupancy of monitoring nest boxes on predation rates were also tested. Predation on larvae was tested through exclusion treatments at 20 replicate stations over four elevations at one site, while pupae were set out to measure predation at two elevations at three sites. 3. Larval densities were reduced by bird predation at three lower elevations, but not at the highest elevation, and predation rates were 1.9 times higher at the lowest elevation than at the highest elevation. The rate of predation on larvae was not related to background larval density or nest box occupancy, although there were more eggs and chicks at the lowest elevation. Therewere no consistent differences in predation on pupae by elevation. 4. These results suggest that elevational variation in avian predation pressure on larvae may help to drive elevational differences in outbreak tendency, and that birds may play a more important role in geometrid population dynamics than the focus on invertebrate and soil predators of previous work would suggest. Ecosystem exploitation hypothesis, Fennoscandia, generalist predators, Norway, predator exclusion, pupal predation, top-down control. |
format |
Article in Journal/Newspaper |
author |
Pepi, Adam A. Vindstad, Ole Petter Laksforsmo Ek, Malin Jepsen, Jane Uhd |
author_facet |
Pepi, Adam A. Vindstad, Ole Petter Laksforsmo Ek, Malin Jepsen, Jane Uhd |
author_sort |
Pepi, Adam A. |
title |
Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
title_short |
Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
title_full |
Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
title_fullStr |
Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
title_full_unstemmed |
Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
title_sort |
elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/12218 https://doi.org/10.1111/een.12400 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Arctic Fennoscandia |
genre_facet |
Arctic Arctic Fennoscandia |
op_relation |
Ecological Entomology info:eu-repo/grantAgreement/RCN/KLIMAFORSK — Stort program klima/244454/NORWAY/What comes after the new pest? Ecosystem transitions following insect pest outbreaks induced by climate change in the European high North// Pepi, A. A., Vindstad, O. P. L., Ek, M., Jepsen, J. U. (2017). "Elevationally biased avian predation as a contributor to the spatial distribution of geometrid moth outbreaks in sub-arctic mountain birch forest", Ecological Entomology, Volume 42, Issue 4, August 2017, Pages 430–438. FRIDAID 1464088 doi:10.1111/een.12400 0307-6946 1365-2311 https://hdl.handle.net/10037/12218 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1111/een.12400 |
container_title |
Ecological Entomology |
container_volume |
42 |
container_issue |
4 |
container_start_page |
430 |
op_container_end_page |
438 |
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1766301649573249024 |