Tree Hollow

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Tree Hollow

 

a cavity formed in the trunk by the destruction of the internal tissues. The formation of tree hollows is usually the result of the vital activity of several species of saprophytic fungi and bacteria, often with the aid of ants and birds (woodpeckers).

Hollows occur most often in the trunks of old trees, and they develop slowly. Mammals, birds, and insects often live in hollows. Trees with hollows grow poorly and later die because they lose their solidity and are easily broken by wind. If trees with hollows are treated in time, the life of the tree may be prolonged. Treatment consists of the removal of all decayed tissue from the cavity; when the walls have been scraped down to the healthy wood, they are disinfected with 1 percent solution of Formalin or mercuric chloride or with a 3-5 percent solution of iron or copper vitriol and covered with an insulating coating. Small tree hollows are then sealed with wood plugs and large ones with a mixture of clay, sand, and rubble, after which they are covered with cement. In many tree varieties, hollows are treated in autumn, but birches, maples, and poplars are treated from the end of May until July because the early spring flow of sap destroys the insulation coating.

V. A. KOLESNIKOV

References in periodicals archive ?
They support the high value of older, larger, hollow-bearing trees as important refuges for wildlife, and calls to conserve hollow-rich habitats immediately (Gibbons and Lindenmayer 2002, Isaac et al.
Hollow-bearing trees in large glider habitat in south-east Queensland, Australia: abundance, spatial distribution and management.
The characteristics of six species of living hollow-bearing trees and their importance for arboreal marsupials in the dry sclerophyll forests of southeast Queensland, Australia.
The 2009 fires killed almost 80% of live hollow-bearing trees on some sites, and up to 100% of large old dead trees.
The 2099 fires produced a significant decline in large old hollow-bearing trees, almost no remaining old growth forest, a predominance of dense young regrowth, and increased risk of extinction of Leadbeater's possum.
2012) found that 79% of live hollow-bearing trees were killed and 57-100% of large, dead trees were destroyed in the fire.
The loss of hollow-bearing trees in the 2009 fire (Lindenmayer et al.
2011b), which possibly reflects a lower number of hollow-bearing trees in the coastal forests, and the high diversity and abundance of small terrestrial species.
Leadbeater's Possum requires hollow-bearing trees for nest sites.
Harper MJ, McCarthy MA and van der Ree R (2005) The abundance of hollow-bearing trees in urban dry sclerophyll forest and the effect of wind on hollow development.