Evolutionary responses to a changing climate: Implications for reindeer population viability
Abstract If we want to understand how climate change affects long‐lived organisms, we must know how individuals allocate resources between current reproduction and survival. This trade‐off is affected by expected environmental conditions, but the extent to which density independent (DI) and density...
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crwiley:10.1002/ece3.3119 2024-09-15T18:31:48+00:00 Evolutionary responses to a changing climate: Implications for reindeer population viability Bårdsen, Bård‐Jørgen Norges Forskningsråd NordForsk 2017 http://dx.doi.org/10.1002/ece3.3119 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3119 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3119 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 7, issue 15, page 5833-5844 ISSN 2045-7758 2045-7758 journal-article 2017 crwiley https://doi.org/10.1002/ece3.3119 2024-06-25T04:15:22Z Abstract If we want to understand how climate change affects long‐lived organisms, we must know how individuals allocate resources between current reproduction and survival. This trade‐off is affected by expected environmental conditions, but the extent to which density independent (DI) and density dependent (DD) processes interact in shaping individual life histories is less clear. Female reindeer (or caribou: Rangifer tarandus ) are a monotocous large herbivore with a circumpolar distribution. Individuals that experience unpredictable and potentially harsh winters typically adopt risk averse strategies where they allocate more resources to building own body reserves during summer and less to reproduction. Such a strategy implies that the females do not reproduce or that they produce fewer or smaller offspring. A risk averse strategy thus results in females with large autumn body reserves, which is known to increase their survival probabilities if the coming winter is harsh. In contrast, females experiencing predictable winters may adopt a more risk prone strategy in which they allocate more resources to reproduction as they do not need as many resources to buffer potentially adverse winter conditions. This study uses a seasonal state‐dependent model showing that DD and DI processes interact to affect the evolution of reproductive strategies and population dynamics for reindeer. The model was run across a wide range of different winter climatic scenarios: One set of simulations where the average and variability of the environment was manipulated and one set where the frequency of good and poor winters increased. Both reproductive allocation and population dynamics of reindeer were affected by a combination of DI and DD processes even though they were confounded (harsh climates resulted in lowered density). Individual strategies responded, in line with a risk sensitive reproductive allocation, to climatic conditions and in a similar fashion across the two climatic manipulations. Article in Journal/Newspaper Rangifer tarandus Wiley Online Library Ecology and Evolution 7 15 5833 5844 |
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Abstract If we want to understand how climate change affects long‐lived organisms, we must know how individuals allocate resources between current reproduction and survival. This trade‐off is affected by expected environmental conditions, but the extent to which density independent (DI) and density dependent (DD) processes interact in shaping individual life histories is less clear. Female reindeer (or caribou: Rangifer tarandus ) are a monotocous large herbivore with a circumpolar distribution. Individuals that experience unpredictable and potentially harsh winters typically adopt risk averse strategies where they allocate more resources to building own body reserves during summer and less to reproduction. Such a strategy implies that the females do not reproduce or that they produce fewer or smaller offspring. A risk averse strategy thus results in females with large autumn body reserves, which is known to increase their survival probabilities if the coming winter is harsh. In contrast, females experiencing predictable winters may adopt a more risk prone strategy in which they allocate more resources to reproduction as they do not need as many resources to buffer potentially adverse winter conditions. This study uses a seasonal state‐dependent model showing that DD and DI processes interact to affect the evolution of reproductive strategies and population dynamics for reindeer. The model was run across a wide range of different winter climatic scenarios: One set of simulations where the average and variability of the environment was manipulated and one set where the frequency of good and poor winters increased. Both reproductive allocation and population dynamics of reindeer were affected by a combination of DI and DD processes even though they were confounded (harsh climates resulted in lowered density). Individual strategies responded, in line with a risk sensitive reproductive allocation, to climatic conditions and in a similar fashion across the two climatic manipulations. |
author2 |
Norges Forskningsråd NordForsk |
format |
Article in Journal/Newspaper |
author |
Bårdsen, Bård‐Jørgen |
spellingShingle |
Bårdsen, Bård‐Jørgen Evolutionary responses to a changing climate: Implications for reindeer population viability |
author_facet |
Bårdsen, Bård‐Jørgen |
author_sort |
Bårdsen, Bård‐Jørgen |
title |
Evolutionary responses to a changing climate: Implications for reindeer population viability |
title_short |
Evolutionary responses to a changing climate: Implications for reindeer population viability |
title_full |
Evolutionary responses to a changing climate: Implications for reindeer population viability |
title_fullStr |
Evolutionary responses to a changing climate: Implications for reindeer population viability |
title_full_unstemmed |
Evolutionary responses to a changing climate: Implications for reindeer population viability |
title_sort |
evolutionary responses to a changing climate: implications for reindeer population viability |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ece3.3119 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3119 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3119 |
genre |
Rangifer tarandus |
genre_facet |
Rangifer tarandus |
op_source |
Ecology and Evolution volume 7, issue 15, page 5833-5844 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.3119 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
15 |
container_start_page |
5833 |
op_container_end_page |
5844 |
_version_ |
1810473541790859264 |