GermainKneeshawDeGrandpreEtAl2021

Référence

Germain, M., Kneeshaw, D.D., De Grandpre, L., Desrochers, M., James, P.M.A., Vepakomma, U., Poulin, J.-F., Villard, M.-A. (2021) Insectivorous songbirds as early indicators of future defoliation by spruce budworm. Landscape Ecology, 36(10):3013-3027. (Scopus )

Résumé

Context: Although the spatiotemporal dynamics of spruce budworm outbreaks have been intensively studied, forecasting outbreaks remains challenging. During outbreaks, budworm-linked warblers (Tennessee, Cape May, and bay-breasted warbler) show a strong positive response to increases in spruce budworm, but little is known about the relative timing of these responses. Objectives: We hypothesized that these warblers could be used as sentinels of future defoliation of budworm host trees. We examined the timing and magnitude of the relationships between defoliation by spruce budworm and changes in the probability of presence of warblers to determine whether they responded to budworm infestation before local defoliation being observed by standard detection methods. Methods: We modelled this relationship using large-scale point count surveys of songbirds and maps of cumulative time-lagged defoliation over multiple spatial scales (2–30 km radius around sampling points) in Quebec, Canada. Results: All three warbler species responded positively to defoliation at each spatial scale considered, but the timing of their response differed. Maximum probability of presence of Tennessee and Cape May warbler coincided with observations of local defoliation, or provided a one year warning, making them of little use to guide early interventions. In contrast, the probability of presence of bay-breasted warbler consistently increased 3–4 years before defoliation was detectable. Conclusions: Early detection is a critical step in the management of spruce budworm outbreaks and rapid increases in the probability of presence of bay-breasted warbler could be used to identify future epicenters and target ground-based local sampling of spruce budworm. © 2021, The Author(s).

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@ARTICLE { GermainKneeshawDeGrandpreEtAl2021,
    AUTHOR = { Germain, M. and Kneeshaw, D.D. and De Grandpre, L. and Desrochers, M. and James, P.M.A. and Vepakomma, U. and Poulin, J.-F. and Villard, M.-A. },
    JOURNAL = { Landscape Ecology },
    TITLE = { Insectivorous songbirds as early indicators of future defoliation by spruce budworm },
    YEAR = { 2021 },
    NOTE = { cited By 0 },
    NUMBER = { 10 },
    PAGES = { 3013-3027 },
    VOLUME = { 36 },
    ABSTRACT = { Context: Although the spatiotemporal dynamics of spruce budworm outbreaks have been intensively studied, forecasting outbreaks remains challenging. During outbreaks, budworm-linked warblers (Tennessee, Cape May, and bay-breasted warbler) show a strong positive response to increases in spruce budworm, but little is known about the relative timing of these responses. Objectives: We hypothesized that these warblers could be used as sentinels of future defoliation of budworm host trees. We examined the timing and magnitude of the relationships between defoliation by spruce budworm and changes in the probability of presence of warblers to determine whether they responded to budworm infestation before local defoliation being observed by standard detection methods. Methods: We modelled this relationship using large-scale point count surveys of songbirds and maps of cumulative time-lagged defoliation over multiple spatial scales (2–30 km radius around sampling points) in Quebec, Canada. Results: All three warbler species responded positively to defoliation at each spatial scale considered, but the timing of their response differed. Maximum probability of presence of Tennessee and Cape May warbler coincided with observations of local defoliation, or provided a one year warning, making them of little use to guide early interventions. In contrast, the probability of presence of bay-breasted warbler consistently increased 3–4 years before defoliation was detectable. Conclusions: Early detection is a critical step in the management of spruce budworm outbreaks and rapid increases in the probability of presence of bay-breasted warbler could be used to identify future epicenters and target ground-based local sampling of spruce budworm. © 2021, The Author(s). },
    AFFILIATION = { Département des Sciences Biologiques, Centre d’Étude de la Forêt, Université du Québec a Montréal, Montréal, QC H3C 3P8, Canada; Service Canadien des Forêts, Centre de Foresterie des Laurentides, Québec, QC G1V 4C7, Canada; Graduate Department of Forestry, University of Toronto, Toronto, ON M5S 3B3, Canada; FPInnovations, Pointe-Claire, QC H9R 3J9, Canada; WSP Canada Inc, Baie-Comeau, QC G4Z 0A8, Canada; Department of Biology, Mount Allison University, Sackville, NB E4L 1G7, Canada; Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom },
    AUTHOR_KEYWORDS = { Boreal Forest; Choristoneura fumiferana; Insect outbreaks; Setophaga castanea; Time-lagged response },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1007/s10980-021-01300-z },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110509982&doi=10.1007%2fs10980-021-01300-z&partnerID=40&md5=e374fbed97043e7566521e27368915e3 },
}

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