Intraguild predation and mesopredator release effect on long-lived prey
Complete extirpation of a species can generate cascading effects throughout an ecosystem, yet are precisely the goal of island eradications of pest species. "Mesopredator release effect", an asymmetrical special case of intraguild predation, has been hypothesised as a possible indirect effect from eradications, where superpredator removal can generate a mesopredator increase which may increase the impact on their shared prey. Theoretically this suggests that for intraguild predators, the superpredator may protect the shared prey from mesopredation, and removal of superpredators alone is not recommended. We create a model of long-lived age-structured shared prey and explore the non-equilibrium dynamics of this system. The superpredator can impact all prey life-stages (adult survival and reproductive success) whereas the smaller mesopredator can only impact early life-stages (reproductive success). This model is independently tested with data froma closed oceanic island system where eradication of introduced intraguild predators is possible for conservation of threatened birds. Mesopredator release only occurs in strongly top-down moderated (resource-abundant) systems. Even when mesopredator release can occur, the negative impact of more mesopredators is outweighed by the benefit of superpredator removal, allowing recovery of the prey population. Results are robust to 10% variation in model parameters. The consideration of age-structured prey contradicts previous theoretical results for mesopredator release effect and intraguild predation. Superpredator eradication is vital for population recovery of longlived insular species. Nonetheless island conservation must retain a whole-ecosystem perspective given the complex trophic relationships among multiple species on islands.
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Subjects: | P01 - Conservation de la nature et ressources foncières, U10 - Informatique, mathématiques et statistiques, chat, oiseau aquatique, rat, relation prédateur proie, modélisation environnementale, http://aims.fao.org/aos/agrovoc/c_1390, http://aims.fao.org/aos/agrovoc/c_8331, http://aims.fao.org/aos/agrovoc/c_6464, http://aims.fao.org/aos/agrovoc/c_29396, http://aims.fao.org/aos/agrovoc/c_9000056, http://aims.fao.org/aos/agrovoc/c_3785, |
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dig-cirad-fr-5555442024-01-28T18:27:08Z http://agritrop.cirad.fr/555544/ http://agritrop.cirad.fr/555544/ Intraguild predation and mesopredator release effect on long-lived prey. Russell James C., Lecomte Vincent, Dumont Yves, Le Corre Matthieu. 2009. Ecological Modelling, 220 (8) : 1098-1104.https://doi.org/10.1016/j.ecolmodel.2009.01.017 <https://doi.org/10.1016/j.ecolmodel.2009.01.017> Intraguild predation and mesopredator release effect on long-lived prey Russell, James C. Lecomte, Vincent Dumont, Yves Le Corre, Matthieu eng 2009 Ecological Modelling P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 Islande http://aims.fao.org/aos/agrovoc/c_3785 Complete extirpation of a species can generate cascading effects throughout an ecosystem, yet are precisely the goal of island eradications of pest species. "Mesopredator release effect", an asymmetrical special case of intraguild predation, has been hypothesised as a possible indirect effect from eradications, where superpredator removal can generate a mesopredator increase which may increase the impact on their shared prey. Theoretically this suggests that for intraguild predators, the superpredator may protect the shared prey from mesopredation, and removal of superpredators alone is not recommended. We create a model of long-lived age-structured shared prey and explore the non-equilibrium dynamics of this system. The superpredator can impact all prey life-stages (adult survival and reproductive success) whereas the smaller mesopredator can only impact early life-stages (reproductive success). This model is independently tested with data froma closed oceanic island system where eradication of introduced intraguild predators is possible for conservation of threatened birds. Mesopredator release only occurs in strongly top-down moderated (resource-abundant) systems. Even when mesopredator release can occur, the negative impact of more mesopredators is outweighed by the benefit of superpredator removal, allowing recovery of the prey population. Results are robust to 10% variation in model parameters. The consideration of age-structured prey contradicts previous theoretical results for mesopredator release effect and intraguild predation. Superpredator eradication is vital for population recovery of longlived insular species. Nonetheless island conservation must retain a whole-ecosystem perspective given the complex trophic relationships among multiple species on islands. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/555544/1/document_555544.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.ecolmodel.2009.01.017 10.1016/j.ecolmodel.2009.01.017 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolmodel.2009.01.017 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.ecolmodel.2009.01.017 |
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P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 http://aims.fao.org/aos/agrovoc/c_3785 P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 http://aims.fao.org/aos/agrovoc/c_3785 |
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P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 http://aims.fao.org/aos/agrovoc/c_3785 P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 http://aims.fao.org/aos/agrovoc/c_3785 Russell, James C. Lecomte, Vincent Dumont, Yves Le Corre, Matthieu Intraguild predation and mesopredator release effect on long-lived prey |
description |
Complete extirpation of a species can generate cascading effects throughout an ecosystem, yet are precisely the goal of island eradications of pest species. "Mesopredator release effect", an asymmetrical special case of intraguild predation, has been hypothesised as a possible indirect effect from eradications, where superpredator removal can generate a mesopredator increase which may increase the impact on their shared prey. Theoretically this suggests that for intraguild predators, the superpredator may protect the shared prey from mesopredation, and removal of superpredators alone is not recommended. We create a model of long-lived age-structured shared prey and explore the non-equilibrium dynamics of this system. The superpredator can impact all prey life-stages (adult survival and reproductive success) whereas the smaller mesopredator can only impact early life-stages (reproductive success). This model is independently tested with data froma closed oceanic island system where eradication of introduced intraguild predators is possible for conservation of threatened birds. Mesopredator release only occurs in strongly top-down moderated (resource-abundant) systems. Even when mesopredator release can occur, the negative impact of more mesopredators is outweighed by the benefit of superpredator removal, allowing recovery of the prey population. Results are robust to 10% variation in model parameters. The consideration of age-structured prey contradicts previous theoretical results for mesopredator release effect and intraguild predation. Superpredator eradication is vital for population recovery of longlived insular species. Nonetheless island conservation must retain a whole-ecosystem perspective given the complex trophic relationships among multiple species on islands. |
format |
article |
topic_facet |
P01 - Conservation de la nature et ressources foncières U10 - Informatique, mathématiques et statistiques chat oiseau aquatique rat relation prédateur proie modélisation environnementale http://aims.fao.org/aos/agrovoc/c_1390 http://aims.fao.org/aos/agrovoc/c_8331 http://aims.fao.org/aos/agrovoc/c_6464 http://aims.fao.org/aos/agrovoc/c_29396 http://aims.fao.org/aos/agrovoc/c_9000056 http://aims.fao.org/aos/agrovoc/c_3785 |
author |
Russell, James C. Lecomte, Vincent Dumont, Yves Le Corre, Matthieu |
author_facet |
Russell, James C. Lecomte, Vincent Dumont, Yves Le Corre, Matthieu |
author_sort |
Russell, James C. |
title |
Intraguild predation and mesopredator release effect on long-lived prey |
title_short |
Intraguild predation and mesopredator release effect on long-lived prey |
title_full |
Intraguild predation and mesopredator release effect on long-lived prey |
title_fullStr |
Intraguild predation and mesopredator release effect on long-lived prey |
title_full_unstemmed |
Intraguild predation and mesopredator release effect on long-lived prey |
title_sort |
intraguild predation and mesopredator release effect on long-lived prey |
url |
http://agritrop.cirad.fr/555544/ http://agritrop.cirad.fr/555544/1/document_555544.pdf |
work_keys_str_mv |
AT russelljamesc intraguildpredationandmesopredatorreleaseeffectonlonglivedprey AT lecomtevincent intraguildpredationandmesopredatorreleaseeffectonlonglivedprey AT dumontyves intraguildpredationandmesopredatorreleaseeffectonlonglivedprey AT lecorrematthieu intraguildpredationandmesopredatorreleaseeffectonlonglivedprey |
_version_ |
1792497598059249664 |