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Does hollow occurrence vary with forest type? A case study in wet and dry Eucalyptus obliqua forest

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Koch, AJ and Munks, SA and Driscoll, DA and Kirkpatrick, JB (2008) Does hollow occurrence vary with forest type? A case study in wet and dry Eucalyptus obliqua forest. Forest Ecology and Management, 255 (12). pp. 3938-3951. ISSN 0378-1127

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Abstract

Eucalyptus globulus is the predominant exotic hardwood plantation species in Western Australian (WA),
and is often planted adjacent to native eucalypt forests. The increase in number of Mycosphaerella species
associated with Mycosphaerella leaf disease (MLD) in E. globulus plantations inWAin the past decade has
raised concern about the possible movement of pathogens between the native forests and plantations. In
order to determine whether the introduction of new E. globulus genetics into WA may have further
exacerbated this situation, juvenile and adult foliage were taken from a genetics trial near Albany, WA
consisting of 60 full-sib families and Mycosphaerella species identified using morphological and
molecular tools. Eleven species of Mycosphaerella were identified from one plantation: Mycosphaerella fori
(Pseudocercospora fori) and Mycosphaerella ellipsoidea are new records for Australia; Mycosphaerella
tasmaniensis (Passalora tasmaniensis) and Mycosphaerella suttoniae (Kirramyces epicoccoides) are new
records for WA; and Mycosphaerella nubilosa, Mycosphaerella cryptica, Mycosphaerella marksii, Mycosphaerella
molleriana, Mycosphaerella lateralis, Mycosphaerella aurantia and Mycosphaerella parva,
previously recorded for WA. The most frequently isolated species from juvenile foliage was M. marksii
(77%) followed by M. nubilosa (33%). M. nubilosa was most frequently isolated from adult leaves (88%)
followed by M. parva (7.5%). Three species, M. molleriana, M. lateralis and M. cryptica, were only isolated
from adult leaves while M. ellipsoidea was only isolated from juvenile leaves. These records increase the
number of known Mycosphaerella species from eucalypts in WA from 10 to 13. The increase in the
number, distribution and impact of Mycosphaerella species contributing to MLD in WA is of concern both
to the potential productivity of the plantations and the biosecurity of native WA Eucalyptus species.
Continued monitoring of the plantation estate is required to understand the dynamics of the host–
pathogen interactions.

Item Type: Article
Journal or Publication Title: Forest Ecology and Management
Page Range: pp. 3938-3951
ISSN: 0378-1127
Identification Number - DOI: 10.1016/j.foreco.2008.03.025
Additional Information:

Copyright © 2011 Elsevier B.V.

Date Deposited: 19 Mar 2012 23:24
Last Modified: 18 Nov 2014 04:23
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