Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou
BACKGROUND: Migrations in temperate systems typically have two migratory phases, spring and autumn, and many migratory ungulates track the pulse of spring vegetation growth during a synchronized spring migration. In contrast, autumn migrations are generally less synchronous and the cues driving them...
Published in: | Movement Ecology |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
BioMed Central
2021
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8559358/ http://www.ncbi.nlm.nih.gov/pubmed/34724991 https://doi.org/10.1186/s40462-021-00288-0 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:8559358 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:8559358 2023-05-15T15:00:46+02:00 Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou Cameron, Matthew D. Eisaguirre, Joseph M. Breed, Greg A. Joly, Kyle Kielland, Knut 2021-11-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8559358/ http://www.ncbi.nlm.nih.gov/pubmed/34724991 https://doi.org/10.1186/s40462-021-00288-0 en eng BioMed Central http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8559358/ http://www.ncbi.nlm.nih.gov/pubmed/34724991 http://dx.doi.org/10.1186/s40462-021-00288-0 © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. CC0 PDM CC-BY Mov Ecol Research Text 2021 ftpubmed https://doi.org/10.1186/s40462-021-00288-0 2021-11-07T01:50:58Z BACKGROUND: Migrations in temperate systems typically have two migratory phases, spring and autumn, and many migratory ungulates track the pulse of spring vegetation growth during a synchronized spring migration. In contrast, autumn migrations are generally less synchronous and the cues driving them remain understudied. Our goal was to identify the cues that migrants use in deciding when to initiate migration and how this is updated while en route. METHODS: We analyzed autumn migrations of Arctic barren-ground caribou (Rangifer tarandus) as a series of persistent and directional movements and assessed the influence of a suite of environmental factors. We fitted a dynamic-parameter movement model at the individual-level and estimated annual population-level parameters for weather covariates on 389 individual-seasons across 9 years. RESULTS: Our results revealed strong, consistent effects of decreasing temperature and increasing snow depth on migratory movements, indicating that caribou continuously update their migratory decision based on dynamic environmental conditions. This suggests that individuals pace migration along gradients of these environmental variables. Whereas temperature and snow appeared to be the most consistent cues for migration, we also found interannual variability in the effect of wind, NDVI, and barometric pressure. The dispersed distribution of individuals in autumn resulted in diverse environmental conditions experienced by individual caribou and thus pronounced variability in migratory patterns. CONCLUSIONS: By analyzing autumn migration as a continuous process across the entire migration period, we found that caribou migration was largely related to temperature and snow conditions experienced throughout the journey. This mechanism of pacing autumn migration based on indicators of the approaching winter is analogous to the more widely researched mechanism of spring migration, when many migrants pace migration with a resource wave. Such a similarity in mechanisms highlights the different ... Text Arctic Rangifer tarandus PubMed Central (PMC) Arctic Movement Ecology 9 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research |
spellingShingle |
Research Cameron, Matthew D. Eisaguirre, Joseph M. Breed, Greg A. Joly, Kyle Kielland, Knut Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
topic_facet |
Research |
description |
BACKGROUND: Migrations in temperate systems typically have two migratory phases, spring and autumn, and many migratory ungulates track the pulse of spring vegetation growth during a synchronized spring migration. In contrast, autumn migrations are generally less synchronous and the cues driving them remain understudied. Our goal was to identify the cues that migrants use in deciding when to initiate migration and how this is updated while en route. METHODS: We analyzed autumn migrations of Arctic barren-ground caribou (Rangifer tarandus) as a series of persistent and directional movements and assessed the influence of a suite of environmental factors. We fitted a dynamic-parameter movement model at the individual-level and estimated annual population-level parameters for weather covariates on 389 individual-seasons across 9 years. RESULTS: Our results revealed strong, consistent effects of decreasing temperature and increasing snow depth on migratory movements, indicating that caribou continuously update their migratory decision based on dynamic environmental conditions. This suggests that individuals pace migration along gradients of these environmental variables. Whereas temperature and snow appeared to be the most consistent cues for migration, we also found interannual variability in the effect of wind, NDVI, and barometric pressure. The dispersed distribution of individuals in autumn resulted in diverse environmental conditions experienced by individual caribou and thus pronounced variability in migratory patterns. CONCLUSIONS: By analyzing autumn migration as a continuous process across the entire migration period, we found that caribou migration was largely related to temperature and snow conditions experienced throughout the journey. This mechanism of pacing autumn migration based on indicators of the approaching winter is analogous to the more widely researched mechanism of spring migration, when many migrants pace migration with a resource wave. Such a similarity in mechanisms highlights the different ... |
format |
Text |
author |
Cameron, Matthew D. Eisaguirre, Joseph M. Breed, Greg A. Joly, Kyle Kielland, Knut |
author_facet |
Cameron, Matthew D. Eisaguirre, Joseph M. Breed, Greg A. Joly, Kyle Kielland, Knut |
author_sort |
Cameron, Matthew D. |
title |
Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
title_short |
Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
title_full |
Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
title_fullStr |
Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
title_full_unstemmed |
Mechanistic movement models identify continuously updated autumn migration cues in Arctic caribou |
title_sort |
mechanistic movement models identify continuously updated autumn migration cues in arctic caribou |
publisher |
BioMed Central |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8559358/ http://www.ncbi.nlm.nih.gov/pubmed/34724991 https://doi.org/10.1186/s40462-021-00288-0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Rangifer tarandus |
genre_facet |
Arctic Rangifer tarandus |
op_source |
Mov Ecol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8559358/ http://www.ncbi.nlm.nih.gov/pubmed/34724991 http://dx.doi.org/10.1186/s40462-021-00288-0 |
op_rights |
© The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
op_rightsnorm |
CC0 PDM CC-BY |
op_doi |
https://doi.org/10.1186/s40462-021-00288-0 |
container_title |
Movement Ecology |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766332833832370176 |