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Host size and spatiotemporal patterns mediate the coexistence of specialist parasitoids

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Host size and spatiotemporal patterns mediate the coexistence of specialist parasitoids

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dc.contributor.author Pekas, Apostolos es_ES
dc.contributor.author Tena Barreda, Alejandro es_ES
dc.contributor.author Harvey, J.A. es_ES
dc.contributor.author Garcia Marí, Ferran es_ES
dc.contributor.author Frago, Enric es_ES
dc.date.accessioned 2020-10-07T03:33:57Z
dc.date.available 2020-10-07T03:33:57Z
dc.date.issued 2016-05 es_ES
dc.identifier.issn 0012-9658 es_ES
dc.identifier.uri http://hdl.handle.net/10251/151285
dc.description.abstract [EN] Many insect parasitoids are highly specialized and thus develop on only one or a few related host species, yet some hosts are attacked by many different parasitoid species in nature. For this reason, they have been often used to examine the consequences of competitive interactions. Hosts represent limited resources for larval parasitoid development and thus one competitor usually excludes all others. Although parasitoid competition has been debated and studied over the past several decades, understanding the factors that allow for coexistence among species sharing the same host in the field remains elusive. Parasitoids may be able to coexist on the same host species if they partition host resources according to size, age, or stage, or if their dynamics vary at spatial and temporal scales. One area that has thus far received little experimental attention is if competition can alter host usage strategies in parasitoids that in the absence of competitors attack hosts of the same size in the field. Here, we test this hypothesis with two parasitoid species in the genus Aphytis, both of which are specialized on the citrus pest California red scale Aonidiella aurantii. These parasitoids prefer large scales as hosts and yet coexist in sympatry in eastern parts of Spain. Parasitoids and hosts were sampled in 12 replicated orange groves. When host exploitation by the stronger competitor, A. melinus, was high the poorer competitor, A. chrysomphali, changed its foraging strategy to prefer alternative plant substrates where it parasitized hosts of smaller size. Consequently, the inferior parasitoid species shifted both its habitat and host size as a result of competition. Our results suggest that density-dependent size-mediated asymmetric competition is the likely mechanism allowing for the coexistence of these two species, and that the use of suboptimal (small) hosts can be advantageous under conditions imposed by competition where survival in higher quality larger hosts may be greatly reduced. es_ES
dc.description.sponsorship We would like to thank Amparo Aguilar for her valuable help in the field and in the laboratory, and Camille Ponzio for her comments on an earlier version of the manuscript. We are also grateful to three anonymous reviewers and Jay Rosenheim for their helpful comments. This work was supported by the project AGL2005-07155-C03-03 assigned to F. Garcia-Mari from the Ministerio de Educacion y Ciencia of Spain. E. Frago was funded by Marie Curie Intra-European Fellowship within the 7th European Community Framework Programme (FP7-PEOPLE-2012-IEF #329648). es_ES
dc.language Inglés es_ES
dc.publisher Ecological Society of America es_ES
dc.relation MINISTERIO DE EDUCACION /AGL2005-07155-C03-03 es_ES
dc.relation.ispartof Ecology es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Aphytis es_ES
dc.subject California red scale es_ES
dc.subject Competitive exclusion es_ES
dc.subject Host quality es_ES
dc.subject Host-parasitoid interactions es_ES
dc.subject Interspecific competition es_ES
dc.subject Intraguild interactions es_ES
dc.subject Size-mediated interactions es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.title Host size and spatiotemporal patterns mediate the coexistence of specialist parasitoids es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1890/15-0118.1 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/329648/EU es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Agroforestal Mediterráneo - Institut Agroforestal Mediterrani es_ES
dc.description.bibliographicCitation Pekas, A.; Tena Barreda, A.; Harvey, J.; Garcia Marí, F.; Frago, E. (2016). Host size and spatiotemporal patterns mediate the coexistence of specialist parasitoids. Ecology. 97(5):1345-1356. https://doi.org/10.1890/15-0118.1 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1890/15-0118.1 es_ES
dc.description.upvformatpinicio 1345 es_ES
dc.description.upvformatpfin 1356 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 97 es_ES
dc.description.issue 5 es_ES
dc.identifier.pmid 27349108 es_ES
dc.relation.pasarela S\324340 es_ES
dc.contributor.funder MINISTERIO DE EDUCACION es_ES


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