Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor
Environmental variation can induce life-history changes that can last over a large part of the lifetime of an organism. If multiple demographic traits are affected, expected changes in climate may influence environmental covariances among traits in a complex manner. Thus, examining the consequences...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/67499 2023-05-15T13:00:47+02:00 Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor Herfindal, Ivar van de Pol, Martijn Nielsen, Jan T. Saether, Bernt-Erik Moller, Anders P. 2015-12-10T23:25:08Z http://hdl.handle.net/1885/67499 unknown British Ecological Society 0021-8790 http://hdl.handle.net/1885/67499 Journal of Animal Ecology Journal article 2015 ftanucanberra 2015-12-28T23:33:54Z Environmental variation can induce life-history changes that can last over a large part of the lifetime of an organism. If multiple demographic traits are affected, expected changes in climate may influence environmental covariances among traits in a complex manner. Thus, examining the consequences of environmental fluctuations requires that individual information at multiple life stages is available, which is particularly challenging in long-lived species. Here, we analyse how variation in climatic conditions occurring in the year of hatching of female goshawks Accipiter gentilis (L.) affects age-specific variation in demographic traits and lifetime reproductive success (LRS). LRS decreased with increasing temperature in April in the year of hatching, due to lower breeding frequency and shorter reproductive life span. In contrast, the probability for a female to successfully breed was higher in years with a warm April, but lower LRS of the offspring in these years generated a negative covariance among fecundity rates among generations. The mechanism by which climatic conditions generated cohort effects was likely through influencing the quality of the breeding segment of the population in a given year, as the proportion of pigeons in the diet during the breeding period was positively related to annual and LRS, and the diet of adult females that hatched in warm years contained fewer pigeons. Climatic conditions experienced during different stages of individual life histories caused complex patterns of environmental covariance among demographic traits even across generations. Such environmental covariances may either buffer or amplify impacts of climate change on population growth, emphasizing the importance of considering demographic changes during the complete life history of individuals when predicting the effect of climatic change on population dynamics of long-lived species. Article in Journal/Newspaper Accipiter gentilis Australian National University: ANU Digital Collections |
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Open Polar |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
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description |
Environmental variation can induce life-history changes that can last over a large part of the lifetime of an organism. If multiple demographic traits are affected, expected changes in climate may influence environmental covariances among traits in a complex manner. Thus, examining the consequences of environmental fluctuations requires that individual information at multiple life stages is available, which is particularly challenging in long-lived species. Here, we analyse how variation in climatic conditions occurring in the year of hatching of female goshawks Accipiter gentilis (L.) affects age-specific variation in demographic traits and lifetime reproductive success (LRS). LRS decreased with increasing temperature in April in the year of hatching, due to lower breeding frequency and shorter reproductive life span. In contrast, the probability for a female to successfully breed was higher in years with a warm April, but lower LRS of the offspring in these years generated a negative covariance among fecundity rates among generations. The mechanism by which climatic conditions generated cohort effects was likely through influencing the quality of the breeding segment of the population in a given year, as the proportion of pigeons in the diet during the breeding period was positively related to annual and LRS, and the diet of adult females that hatched in warm years contained fewer pigeons. Climatic conditions experienced during different stages of individual life histories caused complex patterns of environmental covariance among demographic traits even across generations. Such environmental covariances may either buffer or amplify impacts of climate change on population growth, emphasizing the importance of considering demographic changes during the complete life history of individuals when predicting the effect of climatic change on population dynamics of long-lived species. |
format |
Article in Journal/Newspaper |
author |
Herfindal, Ivar van de Pol, Martijn Nielsen, Jan T. Saether, Bernt-Erik Moller, Anders P. |
spellingShingle |
Herfindal, Ivar van de Pol, Martijn Nielsen, Jan T. Saether, Bernt-Erik Moller, Anders P. Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
author_facet |
Herfindal, Ivar van de Pol, Martijn Nielsen, Jan T. Saether, Bernt-Erik Moller, Anders P. |
author_sort |
Herfindal, Ivar |
title |
Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
title_short |
Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
title_full |
Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
title_fullStr |
Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
title_full_unstemmed |
Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
title_sort |
climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor |
publisher |
British Ecological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/67499 |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
Journal of Animal Ecology |
op_relation |
0021-8790 http://hdl.handle.net/1885/67499 |
_version_ |
1766260471573250048 |