Presence of Cavities in Snags Retained in Forest Cutblocks: Do Management Policies Promote Species Retention?

Everett, Kim; Otter, Ken A.

doi:10.22621/cfn.v118i3.5

Cited by 12 publications

(12 citation statements)

References 12 publications

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“…The recent expansion of industrial timber harvesting in North American boreal forests has raised concerns about the impacts of extensive forest management on specific attributes such as snags in second-growth forests (Sturtevant et al, 1997;Desponts et al, 2002Desponts et al, , 2004Drapeau et al, 2002Drapeau et al, , 2003 as well as on its associated forest-dwelling wildlife (Doyon et al, 1999;Imbeau et al, 1999Imbeau et al, , 2001Drapeau et al, 2000;Thompson et al, 2003b;Everett and Otter, 2004;Gagné, 2006). In Québec's managed boreal forests, riparian and upland forest strips are often the only remaining forest stands with oldgrowth characteristics along with forests located on steep slopes that are inaccessible to machinery.…”

Section: Effect Of Forest Management On Large Dead Tree Availabilitymentioning

confidence: 99%

Availability of standing trees for large cavity-nesting birds in the eastern boreal forest of Québec, Canada

Vaillancourt

Drapeau

Gauthier

et al. 2008

Forest Ecology and Management

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Section: Effect Of Forest Management On Large Dead Tree Availabilitymentioning

confidence: 99%

Availability of standing trees for large cavity-nesting birds in the eastern boreal forest of Québec, Canada

Vaillancourt

Drapeau

Gauthier

et al. 2008

Forest Ecology and Management

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“…Specifically, direct loss of cavity trees by their removal for timber or other uses, and the limited recruitment of trees into cavity tree cohort have been considered the main causes reducing tree-cavity supply (Hussain et al 2013). Large decaying trees are generally targeted during selective logging because of their high commercial value, and also to reduce hazards such as lightning attraction, tree falls and foci of infection for healthy trees (Everett & Otter 2004;Lindenmayer et al 2012). Standing dead trees (i.e.…”

Section: Introductionmentioning

confidence: 99%

Large trees and decay: Suppliers of a keystone resource for cavity‐using wildlife in old‐growth and secondary Andean temperate forests

et al. 2020

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Tree cavities are a keystone resource for many wildlife species worldwide. In Andean temperate forests of South America, many species of birds, mammals and reptiles use cavities to achieve their life history requirements. However, information on cavity supply and drivers of cavity production in these forests remains largely undocumented. We examined the patterns of tree‐cavity supply in successional native forests, exploring the potential drivers of cavity occurrence and relative abundances in Andean temperate ecosystems of southern Chile. In 10 forest stands, we established 369 vegetation plots and measured 7951 trees. For each tree, we recorded the species and measured the diameter at breast height (DBH), decay class and number of cavities. While tree density was much higher in secondary than in old‐growth forest stands, the density of nonexcavated cavities was higher in old‐growth than in secondary forests. Cavity occurrence and relative abundances (number of cavities per tree) were higher in large decaying and standing dead trees (i.e. habitat legacies) than in young healthy trees. Importantly, DBH and decay had a stronger influence on the supply of nonexcavated than excavated cavities. Our results highlight the importance of old‐growth forest stands, tree decay processes and habitat legacies for securing a continuous supply of a keystone habitat resource for tree cavity‐using wildlife in a global biodiversity hotspot of South America.Abstract in Spanish is available with online material.

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“…; Lindenmayer et al . ), but progress can be hampered by inadequate conservation prescriptions (Gibbons & Lindenmayer ; Everett & Otter ; Hutto ). To effectively conserve cavity‐dependent wildlife, managers should aim to perpetuate cavities at multiple spatial scales (Gibbons et al .…”

Section: Introductionmentioning

confidence: 99%

Validation of a landscape‐scale planning tool for cavity‐dependent wildlife

et al. 2014

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Tree cavities provide important habitat for wildlife. Effective landscape-scale management of cavitydependent wildlife requires an understanding of where cavities occur, but tree cavities can be cryptic and difficult to survey. We assessed whether a landscape-scale map of mature forest habitat availability, derived from aerial photographs, reflected the relative availability of mature trees and tree cavities. We assessed cavities for their suitability for use by wildlife, and whether the map reflected the availability of such cavities. There were significant differences between map categories in several characteristics of mature trees that can be used to predict cavity abundance (i.e. tree form and diameter at breast height).There were significant differences between map categories in the number of potential cavity bearing trees and potential cavities per tree. However, the index of cavity abundance based on observations made from the ground provided an overestimate of true cavity availability. By climbing a sample of mature trees we showed that only 5.1% of potential tree cavities detected from the ground were suitable for wildlife, and these were found in only 12.5% of the trees sampled. We conclude that management tools developed from remotely sensed data can be useful to guide decision-making in the conservation management of tree cavities but stress that the errors inherent in these data limit the scale at which such tools can be applied. The rarity of tree cavities suitable for wildlife in our study highlights the need to conserve the tree cavity resource across the landscape, but also the importance of increasing the accuracy of management tools for decision-making at different scales. Mapping mature forest habitat availability at the landscape scale is a useful first step in managing habitat for cavity-dependent wildlife, but the potential for overestimating actual cavity abundance in a particular area highlights the need for complementary on-ground surveys.

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Presence of Cavities in Snags Retained in Forest Cutblocks: Do Management Policies Promote Species Retention?

Cited by 12 publications

References 12 publications

Availability of standing trees for large cavity-nesting birds in the eastern boreal forest of Québec, Canada

Availability of standing trees for large cavity-nesting birds in the eastern boreal forest of Québec, Canada

Large trees and decay: Suppliers of a keystone resource for cavity‐using wildlife in old‐growth and secondary Andean temperate forests

Validation of a landscape‐scale planning tool for cavity‐dependent wildlife

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