Use of Snags by Birds in Douglas-Fir Forests, Western Oregon

Mannan, R. William; Meslow, E. Charles; Wight, Howard M.

doi:10.2307/3808306

Cited by 154 publications

(103 citation statements)

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“…When they are available, large (>23 cm d.b.h. ), moderately decayed snags and areas of higher snag densities are used disproportionately more than small, less decayed snags and areas of lower snag densities (Lehmkuhl et al 2003, Li and Martin 1991, Mannan et al 1980, Raphael and White 1984, Saab et al 2002. For example, in forests of …”

Section: F Fi Ir Re E a An Nd D S Sa Ag Ge E G Gr Ro Ou Us Se Ementioning

confidence: 99%

Birds and burns of the interior West: descriptions, habitats, and management in western forests.

Saab¹,

Block²,

Russell³

et al. 2007

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Section: F Fi Ir Re E a An Nd D S Sa Ag Ge E G Gr Ro Ou Us Se Ementioning

confidence: 99%

Birds and burns of the interior West: descriptions, habitats, and management in western forests.

Saab¹,

Block²,

Russell³

et al. 2007

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“…Toți arborii morți pe picior, cât și cioatele cu înălțimea mai mare de 1,5 m și diametrul de peste 40 cm au fost înregistrate, iar în cazul lemnului mort la sol au fost luate în evidență doar trunchiurile cu lungimea mai mare de un metru și diametrul de peste 40 cm. Lemnul mort cu diametrul de peste 40 cm este considerat ca fiind favorabil dezvoltării biodiversității forestiere (Bartels et al 1985, Raphael 1980, Mannan et al 1980). Toți arborii pe picior cu diametrul de bază de >8 cm au fost au fost inventariați, precum și microhabitatele asociate arborilor vii, indiferent de dimensiunile acestora.…”

Section: Clasă De Producțieunclassified

Evaluarea biodiversității în arborete de amestec din nordul Carpaților Orientali: un studiu de caz bazat pe indicele biodiversității potențiale

Burlui¹,

Cenușă²

2017

Bucov. For.

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. Biodiversity assessment on mixed forest stands in north of Eastern Carpathians: a study case based on Potential Biodiversity Index. Bucov. For. 17(1): 35-45.Abstract. In this article we present an application of the IBP index (Potential Biodiversity Index), used for assessing potential biodiversity in forest stands. The proposed index is based on the score of ten factors: seven are related to forest management (structural particularities of the forest) and three are related to environmental context. The study was conducted in a mixed forest located in Ursoaia area from Frasin, Suceava Forest Department, Romania. The factors were evaluated in 96 plots from 6 forest stands, 3 of them included in a scientific reservation, and 3 are timber production stands. The index values were calculated for each plot, and further for each forest stand. Index values varied from a stand to another, also within the same stand, from one sample plot to another according to the specific feature identified in each plot. The index values were higher in the stands included in the scientific reservation. This is explained by the number of tree species, the high number of large trees, the vertical structure of the stands, the amount of dead wood. IBP -index is a good tool to evaluate the forest biodiversity. The results can be analyzed for longer periods of time, and also may indicate the factors that can be improved by specific actions.

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“…Decayed portions of the tree allow for easier cavity excavation for weaker cavity excavators, and the bark cover retains moisture and warmth as well as providing protection from predators (Runde and Capen 1987). Decayed portions of the tree also provide valuable foraging habitat as they often contain high levels of beetle larvae, carpenter ants, and termite activity, all of which act as food resources for woodpeckers (Mannan et al 1980). This too may explain the lower use of cavities in cutblocks, as trees retained in these areas had less decay compared to trees sampled randomly in the surrounding forests.…”

Section: Tree Attributes and Cavity Abundancementioning

confidence: 99%

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

Everett

Otter

2004

Can Field Nat

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Everett, Kim T., and Ken A. Otter. 2004. Presence of cavities in snags retained in forest cutblocks: do management policies promote species retention? Canadian Field-Naturalist 118(3): 354-359.Tree cavities, which are frequently excavated by primary cavity nesters, are typically used by a number of avian and non-avian species and are thus important components in maintaining biodiversity in forest ecosystems. One way to provide these habitat opportunities in harvested areas is through the retention of snags. In this study, we assessed the habitat and snag characteristics that promote cavity excavation, using the presence of cavities to infer activity of primary cavity excavators. Snags retained closer to the forest/cutblock edge contained a greater density of cavities than trees further from edge. However, the proportion of cavities found within cutblocks declined at a more rapid rate with distance from edge than did those in adjacent forested stands. There was also a tendency for cavities to occur more frequently in trees that were at the advanced stages of decay. The results of our study suggest management for snags in harvest areas should include the retention of snags closer to the forest edge combined with incorporating trees showing signs of advanced decay.

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Use of Snags by Birds in Douglas-Fir Forests, Western Oregon

Cited by 154 publications

References 0 publications

Birds and burns of the interior West: descriptions, habitats, and management in western forests.

Birds and burns of the interior West: descriptions, habitats, and management in western forests.

Evaluarea biodiversității în arborete de amestec din nordul Carpaților Orientali: un studiu de caz bazat pe indicele biodiversității potențiale

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

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