Urban to forest gradients: suitability for hollow bearing trees and implications for obligate hollow nesters

Isaac,B, White,J, Ierodiaconou,D and Cooke,R 2014, Urban to forest gradients: suitability for hollow bearing trees and implications for obligate hollow nesters, Austral ecology, vol. 39, no. 8, pp. 963-972, doi: 10.1111/aec.12164.

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Title Urban to forest gradients: suitability for hollow bearing trees and implications for obligate hollow nesters
Author(s) Isaac,B
White,JORCID iD for White,J orcid.org/0000-0002-7375-5944
Ierodiaconou,DORCID iD for Ierodiaconou,D orcid.org/0000-0002-7832-4801
Cooke,RORCID iD for Cooke,R orcid.org/0000-0002-8843-7113
Journal name Austral ecology
Volume number 39
Issue number 8
Start page 963
End page 972
Publisher Wiley-Blackwell Publishing Asia
Place of publication Richmond, Vic
Publication date 2014-12
ISSN 1442-9985
Summary  Resource availability is a limiting factor influencing the distribution and composition of faunal communities. Globally, hollow bearing trees are a resource required by wildlife at all trophic levels, and are used for a diverse range of ecological functions. In the northern hemisphere avian species act as primary hollow excavators, whereas the southern hemisphere must rely on complex interactions between stochastic events, and eventual decay. Hollow formation is therefore a slow process in the southern hemisphere. In contrast, hollow loss is quite rapid and influenced greatly by anthropogenic impacts.To identify the ecological characteristics driving hollows over an urban to forest gradient as a resource for the powerful owl (Ninox strenua) and its prey we used presence-only modelling. The potential for an area to support tree hollows suitable for powerful owls and their prey was linked to the density of ephemeral rivers, land cover, tree cover and distance from riparian vegetation. The potential for large hollows throughout the landscape, suitable for the powerful owl, was also influenced by density of permanent rivers. Potential habitat for tree hollows, capable of supporting powerful owls and their prey was greatest in forested environments, declining with increased urbanization. However the urban region still supported some smaller tree hollows suitable for arboreal marsupials. Managing for urban dwelling species, is not as simple as retaining old hollow producing trees or providing alternate nesting structures. We also need to mitigate increased mortality associated with built environments (e.g. electrocution, collisions).
Language eng
DOI 10.1111/aec.12164
Field of Research 050202 Conservation and Biodiversity
Socio Economic Objective 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Wiley-Blackwell Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30068047

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