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Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)

Allee effects are important dynamical mechanisms in small-density populations in which per capita population growth rate increases with density. When positive density dependence is sufficiently severe (a ‘strong’ Allee effect), a critical density arises below which populations do not persist. For sp...

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Detalles Bibliográficos
Autores principales: Vercken, E, Kramer, A M, Tobin, P C, Drake, J M
Formato: Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3064761/
https://www.ncbi.nlm.nih.gov/pubmed/21138513
http://dx.doi.org/10.1111/j.1461-0248.2010.01569.x
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author Vercken, E
Kramer, A M
Tobin, P C
Drake, J M
author_facet Vercken, E
Kramer, A M
Tobin, P C
Drake, J M
author_sort Vercken, E
collection PubMed
description Allee effects are important dynamical mechanisms in small-density populations in which per capita population growth rate increases with density. When positive density dependence is sufficiently severe (a ‘strong’ Allee effect), a critical density arises below which populations do not persist. For spatially distributed populations subject to dispersal, theory predicts that the occupied area also exhibits a critical threshold for population persistence, but this result has not been confirmed in nature. We tested this prediction in patterns of population persistence across the invasion front of the European gypsy moth (Lymantria dispar) in the United States in data collected between 1996 and 2008. Our analysis consistently provided evidence for effects of both population area and density on persistence, as predicted by the general theory, and confirmed here using a mechanistic model developed for the gypsy moth system. We believe this study to be the first empirical documentation of critical patch size induced by an Allee effect.
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spelling pubmed-30647612011-03-30 Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.) Vercken, E Kramer, A M Tobin, P C Drake, J M Ecol Lett Letters Allee effects are important dynamical mechanisms in small-density populations in which per capita population growth rate increases with density. When positive density dependence is sufficiently severe (a ‘strong’ Allee effect), a critical density arises below which populations do not persist. For spatially distributed populations subject to dispersal, theory predicts that the occupied area also exhibits a critical threshold for population persistence, but this result has not been confirmed in nature. We tested this prediction in patterns of population persistence across the invasion front of the European gypsy moth (Lymantria dispar) in the United States in data collected between 1996 and 2008. Our analysis consistently provided evidence for effects of both population area and density on persistence, as predicted by the general theory, and confirmed here using a mechanistic model developed for the gypsy moth system. We believe this study to be the first empirical documentation of critical patch size induced by an Allee effect. Blackwell Publishing Ltd 2011-02 /pmc/articles/PMC3064761/ /pubmed/21138513 http://dx.doi.org/10.1111/j.1461-0248.2010.01569.x Text en Copyright © 2011 Blackwell Publishing Ltd/CNRS http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
spellingShingle Letters
Vercken, E
Kramer, A M
Tobin, P C
Drake, J M
Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title_full Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title_fullStr Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title_full_unstemmed Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title_short Critical patch size generated by Allee effect in gypsy moth, Lymantria dispar (L.)
title_sort critical patch size generated by allee effect in gypsy moth, lymantria dispar (l.)
topic Letters
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3064761/
https://www.ncbi.nlm.nih.gov/pubmed/21138513
http://dx.doi.org/10.1111/j.1461-0248.2010.01569.x
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