Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce

Young plantation trees are often highly vulnerable to insect herbivory in ways that are difficult to predict as underlying mechanisms linked to plant traits and natural enemy pressure interact in context-dependent ways. We compared bottom-up and top-down forces acting on spruce budworm (Choristoneur...

Descripción completa

Detalles Bibliográficos
Autores: Noor, Sabina, Gozalzadeh, Zahra, Yataco, Allison Pamela, Montoro Girona, Miguel, Despland, Emma
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/27399
Acceso en línea:https://hdl.handle.net/10272/27399
Access Level:acceso abierto
Palabra clave:Choristoneura fumiferana
Defoliation
Foliar toughness
Outbreak
Picea glauca
Parasitism
Plantation
Predation
Sentinel larvae Understory
Understory
3106 Ciencia Forestal
id ES_e0434301b4a7c4e0bdbd61a2fd30080a
oai_identifier_str oai:ariasmontano.uhu.es:10272/27399
network_acronym_str ES
network_name_str España
repository_id_str
spelling Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruceNoor, SabinaGozalzadeh, ZahraYataco, Allison PamelaMontoro Girona, MiguelDespland, EmmaChoristoneura fumiferanaDefoliationFoliar toughnessOutbreakPicea glaucaParasitismPlantationPredationSentinel larvae UnderstoryUnderstory3106 Ciencia ForestalYoung plantation trees are often highly vulnerable to insect herbivory in ways that are difficult to predict as underlying mechanisms linked to plant traits and natural enemy pressure interact in context-dependent ways. We compared bottom-up and top-down forces acting on spruce budworm (Choristoneura fumiferana) on young white spruce (Picea glauca) trees in plantations vs in natural regeneration under hardwood canopy. The spruce budworm is the most important outbreaking conifer defoliator in Eastern Canada, and we aim to better understand budworm herbivory on young trees, given its importance for post-outbreak forest succession. We conducted a 4-year field survey in Northwestern Qu´ebec, Canada, to compare plant phenology, budworm density, defoliation rates, predator populations, and parasitism between the two habitats. We also designed manipulative experiments with sentinel larvae to assess bottom-up and top-down forces in these habitats. The field survey showed earlier budburst phenology in plantation trees, affecting synchronization with budworm emergence from diapause. Field survey results also included slightly higher budworm density and lower larval parasitism in plantations, but no significant difference in current-year growth defoliation. The bottom-up experiment showed slightly better budworm biological performance, indicated by higher pupal mass, in plantations. The top-down experiment suggested slightly higher predation and parasitism in the natural forests. Together, our results show how mechanisms controlling insect defoliator populations are context-dependent. In plantations both bottom-up and top-down pressures on the spruce budworm appear slightly eased, leading to marginally better biological performance and higher population density of this forest pest. However, differences are so minor that no impact on defoliation is observed.Elsevier20252025-01-0120252025-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10272/27399reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/273992026-06-02T14:58:11Z
dc.title.none.fl_str_mv Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
title Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
spellingShingle Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
Noor, Sabina
Choristoneura fumiferana
Defoliation
Foliar toughness
Outbreak
Picea glauca
Parasitism
Plantation
Predation
Sentinel larvae Understory
Understory
3106 Ciencia Forestal
title_short Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
title_full Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
title_fullStr Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
title_full_unstemmed Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
title_sort Bottom-up and top-down forces regulate spruce budworm (Lepidoptera: Tortricidae) biological performance on regenerating white spruce
dc.creator.none.fl_str_mv Noor, Sabina
Gozalzadeh, Zahra
Yataco, Allison Pamela
Montoro Girona, Miguel
Despland, Emma
author Noor, Sabina
author_facet Noor, Sabina
Gozalzadeh, Zahra
Yataco, Allison Pamela
Montoro Girona, Miguel
Despland, Emma
author_role author
author2 Gozalzadeh, Zahra
Yataco, Allison Pamela
Montoro Girona, Miguel
Despland, Emma
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Choristoneura fumiferana
Defoliation
Foliar toughness
Outbreak
Picea glauca
Parasitism
Plantation
Predation
Sentinel larvae Understory
Understory
3106 Ciencia Forestal
topic Choristoneura fumiferana
Defoliation
Foliar toughness
Outbreak
Picea glauca
Parasitism
Plantation
Predation
Sentinel larvae Understory
Understory
3106 Ciencia Forestal
description Young plantation trees are often highly vulnerable to insect herbivory in ways that are difficult to predict as underlying mechanisms linked to plant traits and natural enemy pressure interact in context-dependent ways. We compared bottom-up and top-down forces acting on spruce budworm (Choristoneura fumiferana) on young white spruce (Picea glauca) trees in plantations vs in natural regeneration under hardwood canopy. The spruce budworm is the most important outbreaking conifer defoliator in Eastern Canada, and we aim to better understand budworm herbivory on young trees, given its importance for post-outbreak forest succession. We conducted a 4-year field survey in Northwestern Qu´ebec, Canada, to compare plant phenology, budworm density, defoliation rates, predator populations, and parasitism between the two habitats. We also designed manipulative experiments with sentinel larvae to assess bottom-up and top-down forces in these habitats. The field survey showed earlier budburst phenology in plantation trees, affecting synchronization with budworm emergence from diapause. Field survey results also included slightly higher budworm density and lower larval parasitism in plantations, but no significant difference in current-year growth defoliation. The bottom-up experiment showed slightly better budworm biological performance, indicated by higher pupal mass, in plantations. The top-down experiment suggested slightly higher predation and parasitism in the natural forests. Together, our results show how mechanisms controlling insect defoliator populations are context-dependent. In plantations both bottom-up and top-down pressures on the spruce budworm appear slightly eased, leading to marginally better biological performance and higher population density of this forest pest. However, differences are so minor that no impact on defoliation is observed.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-01-01
2025
2025-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10272/27399
url https://hdl.handle.net/10272/27399
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869422186212622336
score 15,812429

Similares en LA Referencia