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Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics
1. Assessing the source–sink status of populations and habitats is of major importance for understanding population dynamics and for the management of natural populations. Sources produce a net surplus of individuals (per capita contribution to the metapopulation > 1) and will be the main contrib...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7756878/ https://www.ncbi.nlm.nih.gov/pubmed/32981078 http://dx.doi.org/10.1111/1365-2656.13357 |
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author | Paquet, Matthieu Arlt, Debora Knape, Jonas Low, Matthew Forslund, Pär Pärt, Tomas |
author_facet | Paquet, Matthieu Arlt, Debora Knape, Jonas Low, Matthew Forslund, Pär Pärt, Tomas |
author_sort | Paquet, Matthieu |
collection | PubMed |
description | 1. Assessing the source–sink status of populations and habitats is of major importance for understanding population dynamics and for the management of natural populations. Sources produce a net surplus of individuals (per capita contribution to the metapopulation > 1) and will be the main contributors for self‐sustaining populations, whereas sinks produce a deficit (contribution < 1). However, making these types of assessments is generally hindered by the problem of separating mortality from permanent emigration, especially when survival probabilities as well as moved distances are habitat‐specific. 2. To address this long‐standing issue, we propose a spatial multi‐event integrated population model (IPM) that incorporates habitat‐specific dispersal distances of individuals. Using information about local movements, this IPM adjusts survival estimates for emigration outside the study area. 3. Analysing 24 years of data on a farmland passerine (the northern wheatear Oenanthe oenanthe), we assessed habitat‐specific contributions, and hence the source–sink status and temporal variation of two key breeding habitats, while accounting for habitat‐ and sex‐specific local dispersal distances of juveniles and adults. We then examined the sensitivity of the source–sink analysis by comparing results with and without accounting for these local movements. 4. Estimates of first‐year survival, and consequently habitat‐specific contributions, were higher when local movement data were included. The consequences from including movement data were sex specific, with contribution shifting from sink to likely source in one habitat for males, and previously noted habitat differences for females disappearing. 5. Assessing the source–sink status of habitats is extremely challenging. We show that our spatial IPM accounting for local movements can reduce biases in estimates of the contribution by different habitats, and thus reduce the overestimation of the occurrence of sink habitats. This approach allows combining all available data on demographic rates and movements, which will allow better assessment of source–sink dynamics and better informed conservation interventions. |
format | Online Article Text |
id | pubmed-7756878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-77568782020-12-28 Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics Paquet, Matthieu Arlt, Debora Knape, Jonas Low, Matthew Forslund, Pär Pärt, Tomas J Anim Ecol Population Ecology 1. Assessing the source–sink status of populations and habitats is of major importance for understanding population dynamics and for the management of natural populations. Sources produce a net surplus of individuals (per capita contribution to the metapopulation > 1) and will be the main contributors for self‐sustaining populations, whereas sinks produce a deficit (contribution < 1). However, making these types of assessments is generally hindered by the problem of separating mortality from permanent emigration, especially when survival probabilities as well as moved distances are habitat‐specific. 2. To address this long‐standing issue, we propose a spatial multi‐event integrated population model (IPM) that incorporates habitat‐specific dispersal distances of individuals. Using information about local movements, this IPM adjusts survival estimates for emigration outside the study area. 3. Analysing 24 years of data on a farmland passerine (the northern wheatear Oenanthe oenanthe), we assessed habitat‐specific contributions, and hence the source–sink status and temporal variation of two key breeding habitats, while accounting for habitat‐ and sex‐specific local dispersal distances of juveniles and adults. We then examined the sensitivity of the source–sink analysis by comparing results with and without accounting for these local movements. 4. Estimates of first‐year survival, and consequently habitat‐specific contributions, were higher when local movement data were included. The consequences from including movement data were sex specific, with contribution shifting from sink to likely source in one habitat for males, and previously noted habitat differences for females disappearing. 5. Assessing the source–sink status of habitats is extremely challenging. We show that our spatial IPM accounting for local movements can reduce biases in estimates of the contribution by different habitats, and thus reduce the overestimation of the occurrence of sink habitats. This approach allows combining all available data on demographic rates and movements, which will allow better assessment of source–sink dynamics and better informed conservation interventions. John Wiley and Sons Inc. 2020-10-20 2020-12 /pmc/articles/PMC7756878/ /pubmed/32981078 http://dx.doi.org/10.1111/1365-2656.13357 Text en © 2020 The Authors. Journal of Animal Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Population Ecology Paquet, Matthieu Arlt, Debora Knape, Jonas Low, Matthew Forslund, Pär Pärt, Tomas Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title | Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title_full | Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title_fullStr | Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title_full_unstemmed | Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title_short | Why we should care about movements: Using spatially explicit integrated population models to assess habitat source–sink dynamics |
title_sort | why we should care about movements: using spatially explicit integrated population models to assess habitat source–sink dynamics |
topic | Population Ecology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7756878/ https://www.ncbi.nlm.nih.gov/pubmed/32981078 http://dx.doi.org/10.1111/1365-2656.13357 |
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