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Long-term survival of trees retained for hollow-using fauna in partially harvested forest in Tasmania, Australia

Citation

Koch, AJ and Chuter, A and Barmuta, LA and Turner, P and Munks, SA, Long-term survival of trees retained for hollow-using fauna in partially harvested forest in Tasmania, Australia, Forest Ecology and Management, 422 pp. 263-272. ISSN 0378-1127 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Elsevier B.V.

DOI: doi:10.1016/j.foreco.2018.03.054

Abstract

Hollow-using fauna are thought to be particularly vulnerable to timber harvesting, and habitat for these species is often managed by retaining single hollow-bearing trees or patches of hollow-bearing trees within the harvested area. This study examined tree retention, survival and use by arboreal mammals in 27 small clumps of trees (0.040.21 ha) retained at ten partial harvest sites and 24 clumps of trees in nearby unharvested sites in Tasmania, Australia. Harvested sites were assessed on three occasions (1999, 200506 and 2014) and unharvested sites on two occasions (200506 and 2014). Of the retained clumps in harvested areas, 96% contained at least two habitat trees at the time of first survey (one year after harvest) which is the minimum required under the Tasmanian Forest Practices Code. Loss of retained trees in clumps between 200506 and 2014 was higher in harvested sites (average of 11.7% of all trees and 1.5% of habitat trees per clump) than unharvested sites (average of 2.8% of all trees and 0.3% of habitat trees per clump), but was comparable to or lower than rates of loss in many other studies. Trees were more likely to fall if they were dead and had little burn damage at the time of last survey. Factors found to influence tree death included the interaction between burn damage and the size of the tree, with the likelihood of a heavily burnt, average sized tree dying being twice that of an unburnt tree. Scratch marks from arboreal mammals were more prevalent in large trees with visible hollows, particularly in the clumps in harvested areas. In conclusion, the Tasmanian Forest Practices Code provisions were generally implemented as required and the evidence suggests the retained clumps of trees survive and are effective to some degree at providing habitat and promoting recolonisation by fauna in partial harvest coupes. However, further work is required to assess the adequacy of the clump provisions, when combined with management for other values in production forests, for maintaining hollow-using fauna throughout their range.

Item Details

Item Type:Refereed Article
Keywords:forest hollows management, tree cavities, forestry, conservation planning, hollow-using fauna, management prescriptions, habitat trees
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forestry management and environment
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Assessment and management of terrestrial ecosystems
UTAS Author:Koch, AJ (Ms Amelia Koch)
UTAS Author:Barmuta, LA (Associate Professor Leon Barmuta)
UTAS Author:Turner, P (Dr Perpetua Turner)
UTAS Author:Munks, SA (Dr Sarah Munks)
ID Code:149421
Year Published:2018
Web of Science® Times Cited:3
Deposited By:Office of the School of Natural Sciences
Deposited On:2022-03-29
Last Modified:2022-05-18
Downloads:0

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