Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.

Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may be exhausted and the inner bark successfully colonized, killing the tree in t...

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Autores principales:	Kyrre L Kausrud, Jean-Claude Grégoire, Olav Skarpaas, Nadir Erbilgin, Marius Gilbert, Bjørn Økland, Nils Chr Stenseth
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a98faec3ea214089824c38d6358dd85a
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spelling	oai:doaj.org-article:a98faec3ea214089824c38d6358dd85a2021-11-18T06:53:16ZTrees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.1932-620310.1371/journal.pone.0018274https://doaj.org/article/a98faec3ea214089824c38d6358dd85a2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21647433/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may be exhausted and the inner bark successfully colonized, killing the tree in the process. Here we investigate under what conditions participating with unrelated conspecifics in risky mass attacks on living trees is an adaptive strategy, and what this can tell us about bark beetle outbreak dynamics. We find that the outcome of individual host selection may deviate from the ideal free distribution in a way that facilitates the emergence of tree-killing (aggressive) behavior, and that any heritability on traits governing aggressiveness seems likely to exist in a state of flux or cycles consistent with variability observed in natural populations. This may have implications for how economically and ecologically important species respond to environmental changes in climate and landscape (forest) structure. The population dynamics emerging from individual behavior are complex, capable of switching between "endemic" and "epidemic" regimes spontaneously or following changes in host availability or resistance. Model predictions are compared to empirical observations, and we identify some factors determining the occurrence and self-limitation of epidemics.Kyrre L KausrudJean-Claude GrégoireOlav SkarpaasNadir ErbilginMarius GilbertBjørn ØklandNils Chr StensethPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 5, p e18274 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kyrre L Kausrud Jean-Claude Grégoire Olav Skarpaas Nadir Erbilgin Marius Gilbert Bjørn Økland Nils Chr Stenseth Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
description	Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may be exhausted and the inner bark successfully colonized, killing the tree in the process. Here we investigate under what conditions participating with unrelated conspecifics in risky mass attacks on living trees is an adaptive strategy, and what this can tell us about bark beetle outbreak dynamics. We find that the outcome of individual host selection may deviate from the ideal free distribution in a way that facilitates the emergence of tree-killing (aggressive) behavior, and that any heritability on traits governing aggressiveness seems likely to exist in a state of flux or cycles consistent with variability observed in natural populations. This may have implications for how economically and ecologically important species respond to environmental changes in climate and landscape (forest) structure. The population dynamics emerging from individual behavior are complex, capable of switching between "endemic" and "epidemic" regimes spontaneously or following changes in host availability or resistance. Model predictions are compared to empirical observations, and we identify some factors determining the occurrence and self-limitation of epidemics.
format	article
author	Kyrre L Kausrud Jean-Claude Grégoire Olav Skarpaas Nadir Erbilgin Marius Gilbert Bjørn Økland Nils Chr Stenseth
author_facet	Kyrre L Kausrud Jean-Claude Grégoire Olav Skarpaas Nadir Erbilgin Marius Gilbert Bjørn Økland Nils Chr Stenseth
author_sort	Kyrre L Kausrud
title	Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
title_short	Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
title_full	Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
title_fullStr	Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
title_full_unstemmed	Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.
title_sort	trees wanted--dead or alive! host selection and population dynamics in tree-killing bark beetles.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/a98faec3ea214089824c38d6358dd85a
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Trees wanted--dead or alive! Host selection and population dynamics in tree-killing bark beetles.

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