Fire-mediated interactions between a tree-killing bark beetle and its competitors

Tabacaru, Crisia; McPike, Sarah M.; Erbilgin, Nadir

doi:10.1016/j.foreco.2015.07.006

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…ex Hildebr.). In North America, there have also been similar reports concerning prescribed fires in pine forests; Tabacaru et al [41] reported the presence of Xyleborus xylographus Say (Coleoptera: Curculionidae) in burned pine stands after prescribed fires, though beetles were not present in nearby unburned pines, and Sullivan et al [42] reported that Xyleborus pubescens Zimmermann (Coleoptera: Curculionidae) was attracted to burned pines in numbers that correlated positively with burn severity.…”

Section: Wildfire and Fire-related Factorsmentioning

confidence: 69%

Ambrosia Beetle Attacks in Mediterranean Cork Oak Forests Following Fire: Which Factors Drive Host Selection?

Catry

Branco

Moreira

et al. 2022

Fire

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Mediterranean Basin forest ecosystems are recurrently affected by wildfires. The occurrence of insect pests following fire may be a critical factor affecting tree survival and forest recovery. Although ambrosia beetles are viewed with increasing concern, information about the host selection and colonization behavior of these beetles in Mediterranean broadleaf forests is very scarce and inexistent in areas affected by wildfires. After a forest fire in Portugal, we selected 841 burned and unburned cork oak trees and assessed the presence and intensity of ambrosia beetle attacks, as well as other tree characteristics, and used generalized linear models to investigate the factors driving host selection. In contrast with burned oaks, where beetle attacks were frequent, the unburned trees were little affected. Attacks in the burned forest were more frequent in larger trees that suffered higher fire severity, in trees being exploited for cork (but with thicker bark), and in trees that were closer to the unburned area. A contagious effect to neighboring unburned trees was not observed, and cork harvesting in subsequent years following fire also did not increase the probability of beetle attacks. These results help us to understand the risk of ambrosia beetle attacks and improve forest management in cork oak forests.

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Section: Wildfire and Fire-related Factorsmentioning

confidence: 69%

Ambrosia Beetle Attacks in Mediterranean Cork Oak Forests Following Fire: Which Factors Drive Host Selection?

Catry

Branco

Moreira

et al. 2022

Fire

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“…). Indeed, we observed secondary bark beetles such as Ips pini increase over time, potentially both contributing to tree death and increasing competition (Tabacaru, McPike & Erbilgin ). We therefore hypothesize that a rapid decline in resource quantity may have negatively affected D. ponderosae population growth, as emerging beetles were limited in finding susceptible trees, and bark beetles generally incur high mortality searching for hosts (Raffa & Berryman ).…”

Section: Discussionmentioning

confidence: 94%

Prescribed fire does not promote outbreaks of a primary bark beetle at low‐density populations

Tabacaru

Park

Erbilgin

2015

Journal of Applied Ecology

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Summary The causes of bark beetle outbreaks – particularly the role of disturbances – are poorly understood. Stand‐scale disturbances, like fires, can suddenly improve local host susceptibility and may attract beetles; however, whether such increases can lead to outbreaks in post‐disturbance stands is unclear. Using low‐density Dendroctonus ponderosae mountain pine beetle populations in Pinus contorta lodgepole pine forests in western Canada, we investigated whether prescribed fires promote outbreaks or provide only short‐term resources. Proportionally more burned than non‐burned trees were attacked. At one site, beetle attacks increased in response to a resource pulse, but the proportions of attacked trees and numbers of attacks per tree declined over four years after fire. Elsewhere, beetle attacks remained very low. As the resource (phloem) quality of burned trees remained high three years after fire, we propose that post‐fire mortality, resulting in fewer available host trees, can at least partially explain why D. ponderosae did not build up populations in burned stands. Synthesis and applications. Our study emphasizes the importance of examining long‐term trends in fire–bark beetle interactions, and of understanding low‐density beetle populations. Because fire does not seem to promote mountain pine beetle outbreaks, we recommend the continued use of prescribed fire for the general management of P. contorta forests with low‐density beetle populations.

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Global review on interactions between insect pests and other forest disturbances

et al. 2021

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Fire-mediated interactions between a tree-killing bark beetle and its competitors

Cited by 3 publications

References 30 publications

Ambrosia Beetle Attacks in Mediterranean Cork Oak Forests Following Fire: Which Factors Drive Host Selection?

Ambrosia Beetle Attacks in Mediterranean Cork Oak Forests Following Fire: Which Factors Drive Host Selection?

Prescribed fire does not promote outbreaks of a primary bark beetle at low‐density populations

Global review on interactions between insect pests and other forest disturbances

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