Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings.
International audience Environmental variability, through interannual variation in food availability or climatic variables, is usually detrimental to population growth. It can even select for constancy in key life-history traits, though some exceptions are known. Changes in the level of environmenta...
Published in: | Journal of Animal Ecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://doi.org/10.1111/1365-2656.12140 https://hal.archives-ouvertes.fr/hal-00959811 |
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fttriple:oai:gotriple.eu:10670/1.j1ilp8 2023-05-15T15:14:14+02:00 Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. Barraquand, Frédéric Høye, Toke T. Henden, John-André Yoccoz, Nigel G. Gilg, Olivier Schmidt, Niels M. Sittler, Benoît Ims, Rolf A. Department of Arctic and Marine Biology University of Tromsø (UiT) Arctic Research Centre Aarhus University Aarhus Department of Bioscience Biogéosciences UMR 6282 Dijon (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut für Landespflege University of Freiburg Freiburg Research funded by the Biodiversa ECOCYCLES program, and by the French Polar Institute (IPEV; 'Interactions' program 1036). 2014-03-01 https://doi.org/10.1111/1365-2656.12140 https://hal.archives-ouvertes.fr/hal-00959811 en eng HAL CCSD Wiley hal-00959811 doi:10.1111/1365-2656.12140 PUBMED: 24128282 10670/1.j1ilp8 https://hal.archives-ouvertes.fr/hal-00959811 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology Journal of Animal Ecology, Wiley, 2014, 83 (2), pp.375-387. ⟨10.1111/1365-2656.12140⟩ demographic buffering environmental variance floaters population cycles territoriality envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.1111/1365-2656.12140 2023-01-22T17:09:11Z International audience Environmental variability, through interannual variation in food availability or climatic variables, is usually detrimental to population growth. It can even select for constancy in key life-history traits, though some exceptions are known. Changes in the level of environmental variability are therefore important to predict population growth or life-history evolution. Recently, several cyclic vole and lemming populations have shown large dynamical changes that might affect the demography or life-histories of rodent predators. Skuas constitute an important case study among rodent predators, because of their strongly saturating breeding productivity (they lay only two eggs) and high degree of site fidelity, in which they differ from nomadic predators raising large broods in good rodent years. This suggests that they cannot capitalize on lemming peaks to the same extent as nomadic predators and might be more vulnerable to collapses of rodent cycles. We develop a model for the population dynamics of long-tailed skuas feeding on lemmings to assess the demographic consequences of such variable and non-stationary prey dynamics, based on data collected in NE Greenland. The model shows that populations of long-tailed skua sustain well changes in lemming dynamics, including temporary collapses (e.g. 10 years). A high floater-to-breeder ratio emerges from rigid territorial behaviour and a long-life expectancy, which buffers the impact of adult abundance's decrease on the population reproductive output. The size of the floater compartment is affected by changes in both mean and coefficient of variation of lemming densities (but not cycle amplitude and periodicity per se). In Greenland, the average lemming density is below the threshold density required for successful breeding (including during normally cyclic periods). Due to Jensen's inequality, skuas therefore benefit from lemming variability; a positive effect of environmental variation. Long-tailed skua populations are strongly adapted to ... Article in Journal/Newspaper Arctic Greenland Long-tailed Skua Unknown Arctic Greenland Journal of Animal Ecology 83 2 375 387 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
demographic buffering environmental variance floaters population cycles territoriality envir geo |
spellingShingle |
demographic buffering environmental variance floaters population cycles territoriality envir geo Barraquand, Frédéric Høye, Toke T. Henden, John-André Yoccoz, Nigel G. Gilg, Olivier Schmidt, Niels M. Sittler, Benoît Ims, Rolf A. Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
topic_facet |
demographic buffering environmental variance floaters population cycles territoriality envir geo |
description |
International audience Environmental variability, through interannual variation in food availability or climatic variables, is usually detrimental to population growth. It can even select for constancy in key life-history traits, though some exceptions are known. Changes in the level of environmental variability are therefore important to predict population growth or life-history evolution. Recently, several cyclic vole and lemming populations have shown large dynamical changes that might affect the demography or life-histories of rodent predators. Skuas constitute an important case study among rodent predators, because of their strongly saturating breeding productivity (they lay only two eggs) and high degree of site fidelity, in which they differ from nomadic predators raising large broods in good rodent years. This suggests that they cannot capitalize on lemming peaks to the same extent as nomadic predators and might be more vulnerable to collapses of rodent cycles. We develop a model for the population dynamics of long-tailed skuas feeding on lemmings to assess the demographic consequences of such variable and non-stationary prey dynamics, based on data collected in NE Greenland. The model shows that populations of long-tailed skua sustain well changes in lemming dynamics, including temporary collapses (e.g. 10 years). A high floater-to-breeder ratio emerges from rigid territorial behaviour and a long-life expectancy, which buffers the impact of adult abundance's decrease on the population reproductive output. The size of the floater compartment is affected by changes in both mean and coefficient of variation of lemming densities (but not cycle amplitude and periodicity per se). In Greenland, the average lemming density is below the threshold density required for successful breeding (including during normally cyclic periods). Due to Jensen's inequality, skuas therefore benefit from lemming variability; a positive effect of environmental variation. Long-tailed skua populations are strongly adapted to ... |
author2 |
Department of Arctic and Marine Biology University of Tromsø (UiT) Arctic Research Centre Aarhus University Aarhus Department of Bioscience Biogéosciences UMR 6282 Dijon (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut für Landespflege University of Freiburg Freiburg Research funded by the Biodiversa ECOCYCLES program, and by the French Polar Institute (IPEV; 'Interactions' program 1036). |
format |
Article in Journal/Newspaper |
author |
Barraquand, Frédéric Høye, Toke T. Henden, John-André Yoccoz, Nigel G. Gilg, Olivier Schmidt, Niels M. Sittler, Benoît Ims, Rolf A. |
author_facet |
Barraquand, Frédéric Høye, Toke T. Henden, John-André Yoccoz, Nigel G. Gilg, Olivier Schmidt, Niels M. Sittler, Benoît Ims, Rolf A. |
author_sort |
Barraquand, Frédéric |
title |
Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
title_short |
Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
title_full |
Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
title_fullStr |
Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
title_full_unstemmed |
Demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
title_sort |
demographic responses of a site-faithful and territorial predator to its fluctuating prey: long-tailed skuas and arctic lemmings. |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://doi.org/10.1111/1365-2656.12140 https://hal.archives-ouvertes.fr/hal-00959811 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Long-tailed Skua |
genre_facet |
Arctic Greenland Long-tailed Skua |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology Journal of Animal Ecology, Wiley, 2014, 83 (2), pp.375-387. ⟨10.1111/1365-2656.12140⟩ |
op_relation |
hal-00959811 doi:10.1111/1365-2656.12140 PUBMED: 24128282 10670/1.j1ilp8 https://hal.archives-ouvertes.fr/hal-00959811 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1111/1365-2656.12140 |
container_title |
Journal of Animal Ecology |
container_volume |
83 |
container_issue |
2 |
container_start_page |
375 |
op_container_end_page |
387 |
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1766344708374659072 |