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Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect

Spatial synchrony between populations emerges from endogenous and exogenous processes, such as intra- and interspecific interactions and abiotic factors. Understanding factors contributing to synchronous population dynamics help to better understand what determines abundance of a species. This study...

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Autores principales: Turkia, Tytti, Jousimo, Jussi, Tiainen, Juha, Helle, Pekka, Rintala, Jukka, Hokkanen, Tatu, Valkama, Jari, Selonen, Vesa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7002333/
https://www.ncbi.nlm.nih.gov/pubmed/31927627
http://dx.doi.org/10.1007/s00442-019-04589-5
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author Turkia, Tytti
Jousimo, Jussi
Tiainen, Juha
Helle, Pekka
Rintala, Jukka
Hokkanen, Tatu
Valkama, Jari
Selonen, Vesa
author_facet Turkia, Tytti
Jousimo, Jussi
Tiainen, Juha
Helle, Pekka
Rintala, Jukka
Hokkanen, Tatu
Valkama, Jari
Selonen, Vesa
author_sort Turkia, Tytti
collection PubMed
description Spatial synchrony between populations emerges from endogenous and exogenous processes, such as intra- and interspecific interactions and abiotic factors. Understanding factors contributing to synchronous population dynamics help to better understand what determines abundance of a species. This study focuses on spatial and temporal dynamics in the Eurasian red squirrel (Sciurus vulgaris) using snow-track data from Finland from 29 years. We disentangled the effects of bottom-up and top-down forces as well as environmental factors on population dynamics with a spatiotemporally explicit Bayesian hierarchical approach. We found red squirrel abundance to be positively associated with both the abundance of Norway spruce (Picea abies) cones and the predators, the pine marten (Martes martes) and the northern goshawk (Accipiter gentilis), probably due to shared habitat preferences. The results suggest that red squirrel populations are synchronized over remarkably large distances, on a scale of hundreds of kilometres, and that this synchrony is mainly driven by similarly spatially autocorrelated spruce cone crop. Our research demonstrates how a bottom-up effect can drive spatial synchrony in consumer populations on a very large scale of hundreds of kilometres, and also how an explicit spatiotemporal approach can improve model performance for fluctuating populations. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00442-019-04589-5) contains supplementary material, which is available to authorized users.
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spelling pubmed-70023332020-02-21 Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect Turkia, Tytti Jousimo, Jussi Tiainen, Juha Helle, Pekka Rintala, Jukka Hokkanen, Tatu Valkama, Jari Selonen, Vesa Oecologia Population Ecology–Original Research Spatial synchrony between populations emerges from endogenous and exogenous processes, such as intra- and interspecific interactions and abiotic factors. Understanding factors contributing to synchronous population dynamics help to better understand what determines abundance of a species. This study focuses on spatial and temporal dynamics in the Eurasian red squirrel (Sciurus vulgaris) using snow-track data from Finland from 29 years. We disentangled the effects of bottom-up and top-down forces as well as environmental factors on population dynamics with a spatiotemporally explicit Bayesian hierarchical approach. We found red squirrel abundance to be positively associated with both the abundance of Norway spruce (Picea abies) cones and the predators, the pine marten (Martes martes) and the northern goshawk (Accipiter gentilis), probably due to shared habitat preferences. The results suggest that red squirrel populations are synchronized over remarkably large distances, on a scale of hundreds of kilometres, and that this synchrony is mainly driven by similarly spatially autocorrelated spruce cone crop. Our research demonstrates how a bottom-up effect can drive spatial synchrony in consumer populations on a very large scale of hundreds of kilometres, and also how an explicit spatiotemporal approach can improve model performance for fluctuating populations. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00442-019-04589-5) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2020-01-11 2020 /pmc/articles/PMC7002333/ /pubmed/31927627 http://dx.doi.org/10.1007/s00442-019-04589-5 Text en © The Author(s) 2020 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/.
spellingShingle Population Ecology–Original Research
Turkia, Tytti
Jousimo, Jussi
Tiainen, Juha
Helle, Pekka
Rintala, Jukka
Hokkanen, Tatu
Valkama, Jari
Selonen, Vesa
Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title_full Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title_fullStr Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title_full_unstemmed Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title_short Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
title_sort large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect
topic Population Ecology–Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7002333/
https://www.ncbi.nlm.nih.gov/pubmed/31927627
http://dx.doi.org/10.1007/s00442-019-04589-5
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