Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors
[Background] Most hypotheses on population limitation of small mammals and their predators come from studies carried out in northern latitudes, mainly in boreal ecosystems. In such regions, many predators specialize on voles and predator-prey systems are simpler compared to southern ecosystems where...
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Online Access: | http://hdl.handle.net/10481/31005 https://doi.org/10.1371/journal.pone.0004311 |
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ftunivgranada:oai:digibug.ugr.es:10481/31005 2023-05-15T15:56:34+02:00 Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors Fargallo, Juan A. Martínez Padilla, Jesús Viñuela, Javier Blanco, Guillermo Torre, Ignasi Vergara, Pablo Neve, Liesbeth de 2009 application/pdf http://hdl.handle.net/10481/31005 https://doi.org/10.1371/journal.pone.0004311 eng eng Public Library of Science (PLOS) Fargallo, J.A.; et al. Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors. Plos One, 4(2): e4311 (2009). [http://hdl.handle.net/10481/31005] 1932-6203 doi:10.1371/journal.pone.0004311 http://hdl.handle.net/10481/31005 Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Lizards Population density Population dynamics Predation Predator-prey dynamics Shrews Summer Voles info:eu-repo/semantics/article 2009 ftunivgranada https://doi.org/10.1371/journal.pone.0004311 2020-01-18T10:19:39Z [Background] Most hypotheses on population limitation of small mammals and their predators come from studies carried out in northern latitudes, mainly in boreal ecosystems. In such regions, many predators specialize on voles and predator-prey systems are simpler compared to southern ecosystems where predator communities are made up mostly of generalists and predator-prey systems are more complex. Determining food limitation in generalist predators is difficult due to their capacity to switch to alternative prey when the basic prey becomes scarce. [Methodology] We monitored the population density of a generalist raptor, the Eurasian kestrel Falco tinnunculus over 15 years in a mountainous Mediterranean area. In addition, we have recorded over 11 years the inter-annual variation in the abundance of two main prey species of kestrels, the common vole Microtus arvalis and the eyed lizard Lacerta lepida and a third species scarcely represented in kestrel diet, the great white-toothed shrew Crocidura russula. We estimated the per capita growth rate (PCGR) to analyse population dynamics of kestrel and predator species. [Principal Findings] Multimodel inference determined that the PCGR of kestrels was better explained by a model containing the population density of only one prey species (the common vole) than a model using a combination of the densities of the three prey species. The PCGR of voles was explained by kestrel abundance in combination with annual rainfall and mean annual temperature. In the case of shrews, growth rate was also affected by kestrel abundance and temperature. Finally, we did not find any correlation between kestrel and lizard abundances. [Significance] Our study showed for the first time vertebrate predator-prey relationships at southern latitudes and determined that only one prey species has the capacity to modulate population dynamics of generalist predators and reveals the importance of climatic factors in the dynamics of micromammal species and lizards in the Mediterranean region. The Spanish Ministerio de Educación Ciencia (Projects: CGL2004-04479/BOS and CGL2007-61395/BOS) financed the study over the last four years. Article in Journal/Newspaper Common vole Microtus arvalis DIGIBUG: Repositorio Institucional de la Universidad de Granada PLoS ONE 4 2 e4311 |
institution |
Open Polar |
collection |
DIGIBUG: Repositorio Institucional de la Universidad de Granada |
op_collection_id |
ftunivgranada |
language |
English |
topic |
Lizards Population density Population dynamics Predation Predator-prey dynamics Shrews Summer Voles |
spellingShingle |
Lizards Population density Population dynamics Predation Predator-prey dynamics Shrews Summer Voles Fargallo, Juan A. Martínez Padilla, Jesús Viñuela, Javier Blanco, Guillermo Torre, Ignasi Vergara, Pablo Neve, Liesbeth de Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
topic_facet |
Lizards Population density Population dynamics Predation Predator-prey dynamics Shrews Summer Voles |
description |
[Background] Most hypotheses on population limitation of small mammals and their predators come from studies carried out in northern latitudes, mainly in boreal ecosystems. In such regions, many predators specialize on voles and predator-prey systems are simpler compared to southern ecosystems where predator communities are made up mostly of generalists and predator-prey systems are more complex. Determining food limitation in generalist predators is difficult due to their capacity to switch to alternative prey when the basic prey becomes scarce. [Methodology] We monitored the population density of a generalist raptor, the Eurasian kestrel Falco tinnunculus over 15 years in a mountainous Mediterranean area. In addition, we have recorded over 11 years the inter-annual variation in the abundance of two main prey species of kestrels, the common vole Microtus arvalis and the eyed lizard Lacerta lepida and a third species scarcely represented in kestrel diet, the great white-toothed shrew Crocidura russula. We estimated the per capita growth rate (PCGR) to analyse population dynamics of kestrel and predator species. [Principal Findings] Multimodel inference determined that the PCGR of kestrels was better explained by a model containing the population density of only one prey species (the common vole) than a model using a combination of the densities of the three prey species. The PCGR of voles was explained by kestrel abundance in combination with annual rainfall and mean annual temperature. In the case of shrews, growth rate was also affected by kestrel abundance and temperature. Finally, we did not find any correlation between kestrel and lizard abundances. [Significance] Our study showed for the first time vertebrate predator-prey relationships at southern latitudes and determined that only one prey species has the capacity to modulate population dynamics of generalist predators and reveals the importance of climatic factors in the dynamics of micromammal species and lizards in the Mediterranean region. The Spanish Ministerio de Educación Ciencia (Projects: CGL2004-04479/BOS and CGL2007-61395/BOS) financed the study over the last four years. |
format |
Article in Journal/Newspaper |
author |
Fargallo, Juan A. Martínez Padilla, Jesús Viñuela, Javier Blanco, Guillermo Torre, Ignasi Vergara, Pablo Neve, Liesbeth de |
author_facet |
Fargallo, Juan A. Martínez Padilla, Jesús Viñuela, Javier Blanco, Guillermo Torre, Ignasi Vergara, Pablo Neve, Liesbeth de |
author_sort |
Fargallo, Juan A. |
title |
Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
title_short |
Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
title_full |
Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
title_fullStr |
Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
title_full_unstemmed |
Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors |
title_sort |
kestrel-prey dynamic in a mediterranean region: the effect of generalist predation and climatic factors |
publisher |
Public Library of Science (PLOS) |
publishDate |
2009 |
url |
http://hdl.handle.net/10481/31005 https://doi.org/10.1371/journal.pone.0004311 |
genre |
Common vole Microtus arvalis |
genre_facet |
Common vole Microtus arvalis |
op_relation |
Fargallo, J.A.; et al. Kestrel-Prey Dynamic in a Mediterranean Region: The Effect of Generalist Predation and Climatic Factors. Plos One, 4(2): e4311 (2009). [http://hdl.handle.net/10481/31005] 1932-6203 doi:10.1371/journal.pone.0004311 http://hdl.handle.net/10481/31005 |
op_rights |
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1371/journal.pone.0004311 |
container_title |
PLoS ONE |
container_volume |
4 |
container_issue |
2 |
container_start_page |
e4311 |
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1766391960503844864 |