Effect of patch size on seed removal by harvester ants

The harvester ant Messor barbarus can be responsible for high weed seed losses in dry land cereals in Spain. Because weeds occur in patches, harvester ants have to be able to find and exploit patches. However, seed patches can differ in size and may, therefore, differ in the probability of being dis...

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Detalles Bibliográficos
Autores: Torra, Joel, Atanackovic, V., Blanco Moreno, José Manuel, Royo-Esnal, A., Westerman, P.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/128549
Acceso en línea:https://hdl.handle.net/2445/128549
Access Level:acceso abierto
Palabra clave:Formigues
Collites
Ants
Harvesting
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repository_id_str
spelling Effect of patch size on seed removal by harvester antsTorra, JoelAtanackovic, V.Blanco Moreno, José ManuelRoyo-Esnal, A.Westerman, P.FormiguesCollitesAntsHarvestingThe harvester ant Messor barbarus can be responsible for high weed seed losses in dry land cereals in Spain. Because weeds occur in patches, harvester ants have to be able to find and exploit patches. However, seed patches can differ in size and may, therefore, differ in the probability of being discovered and exploited. Here, 90 patches varying in size from 0.25 to 9 m2 were created in three 50 × 50 m subareas in a cereal field. Oat seeds were sown as weed seed surrogates in the patches at 2000 seeds m−2. After 24 h, those remaining were collected and the exploitation rate (the percentage of seeds removed per patch discovered by ants) was estimated. Harvester ant nests and the location of the seed patches were georeferenced and used to estimate distances between them. The patch encounter rate (the proportion of patches discovered by the ants) decreased slightly, but significantly, with decreasing patch size, though not the exploitation rate, which was lowest in the smallest patches (78-94%) and highest in the largest (99-100%). Seed patches that were not found or partially exploited were mostly located in subareas with a lower ant nest density or a longer distance away from the nearest nest than seed patches that were fully exploited. The results of this study indicate that the interaction between the spatial distribution of ant nests and the patchy distribution of seeds can create opportunities for seeds to be subjected to lower levels of predation.Wiley2019201920162019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion8 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/128549Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1111/wre.12179Weed Research, 2016, vol. 56, num. 1, p. 14-21https://doi.org/10.1111/wre.12179(c) European Weed Research Society, 2016info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1285492026-05-29T05:05:01Z
dc.title.none.fl_str_mv Effect of patch size on seed removal by harvester ants
title Effect of patch size on seed removal by harvester ants
spellingShingle Effect of patch size on seed removal by harvester ants
Torra, Joel
Formigues
Collites
Ants
Harvesting
title_short Effect of patch size on seed removal by harvester ants
title_full Effect of patch size on seed removal by harvester ants
title_fullStr Effect of patch size on seed removal by harvester ants
title_full_unstemmed Effect of patch size on seed removal by harvester ants
title_sort Effect of patch size on seed removal by harvester ants
dc.creator.none.fl_str_mv Torra, Joel
Atanackovic, V.
Blanco Moreno, José Manuel
Royo-Esnal, A.
Westerman, P.
author Torra, Joel
author_facet Torra, Joel
Atanackovic, V.
Blanco Moreno, José Manuel
Royo-Esnal, A.
Westerman, P.
author_role author
author2 Atanackovic, V.
Blanco Moreno, José Manuel
Royo-Esnal, A.
Westerman, P.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Formigues
Collites
Ants
Harvesting
topic Formigues
Collites
Ants
Harvesting
description The harvester ant Messor barbarus can be responsible for high weed seed losses in dry land cereals in Spain. Because weeds occur in patches, harvester ants have to be able to find and exploit patches. However, seed patches can differ in size and may, therefore, differ in the probability of being discovered and exploited. Here, 90 patches varying in size from 0.25 to 9 m2 were created in three 50 × 50 m subareas in a cereal field. Oat seeds were sown as weed seed surrogates in the patches at 2000 seeds m−2. After 24 h, those remaining were collected and the exploitation rate (the percentage of seeds removed per patch discovered by ants) was estimated. Harvester ant nests and the location of the seed patches were georeferenced and used to estimate distances between them. The patch encounter rate (the proportion of patches discovered by the ants) decreased slightly, but significantly, with decreasing patch size, though not the exploitation rate, which was lowest in the smallest patches (78-94%) and highest in the largest (99-100%). Seed patches that were not found or partially exploited were mostly located in subareas with a lower ant nest density or a longer distance away from the nearest nest than seed patches that were fully exploited. The results of this study indicate that the interaction between the spatial distribution of ant nests and the patchy distribution of seeds can create opportunities for seeds to be subjected to lower levels of predation.
publishDate 2016
dc.date.none.fl_str_mv 2016
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/128549
url https://hdl.handle.net/2445/128549
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1111/wre.12179
Weed Research, 2016, vol. 56, num. 1, p. 14-21
https://doi.org/10.1111/wre.12179
dc.rights.none.fl_str_mv (c) European Weed Research Society, 2016
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) European Weed Research Society, 2016
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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