Effects of fire and harvesting on nitrogen transformations and ionic mobility in soils of Eucalyptus regnans forests of south-eastern Australia

Oecologia ◽  
1990 ◽  
Vol 83 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Christopher J. Weston ◽  
Peter M. Attiwill
Keyword(s):  
Ionic Mobility ◽  
Nitrogen Transformations ◽  
Eucalyptus Regnans ◽  
South Eastern ◽  
Eastern Australia ◽  
South Eastern Australia

Effect of Drought and Defoliation on the Susceptibility of Eucalypts to Cankers Caused by Endothia gyrosa and Botryosphaeria ribis

1990 ◽  
Vol 38 (6) ◽  
pp. 571 ◽  
Author(s):  
KM Old ◽  
R Gibbs ◽  
I Craig ◽  
BJ Myers ◽  
ZQ Yuan
Keyword(s):  
Water Stress ◽  
Soluble Carbohydrates ◽  
Eucalyptus Regnans ◽  
South Eastern ◽  
Eastern Australia ◽  
Branch Dieback ◽  
Crown Dieback ◽  
Canker Development ◽  
Insect Attack ◽  
South Eastern Australia

Seedlings, saplings and mature eucalypts were susceptible to infection by Endothia gyrosa and Botryosphaeria ribis. Eucalyptus regnans and E. delegatensis were more susceptible than E. grandis and E. saligna. In trees not subjected to stress, cankers were limited in extent and often healed. When trees were defoliated, either manually or by severe insect attack, stem concentrations of both starch and soluble carbohydrates were reduced and canker development in some pathogen/host combinations was increased. Seedlings subjected to water stress were not predisposed to canker formation. The association of E. gyrosa with branch dieback of rural eucalypts suffering from chronic defoliation suggests that canker fungi contribute to the crown dieback syndrome in south-eastern Australia.

Use of nest trees by the mountain brushtail possum (Trichosurus caninus) (Phalangeridae : Marsupialia). IV. Transitions between den trees

1998 ◽  
Vol 25 (6) ◽  
pp. 611 ◽  
Author(s):  
A. H. Welsh ◽  
D. B. Lindenmayer ◽  
C. F. Donnelly ◽  
A. Ruckstuhl
Keyword(s):  
Statistical Models ◽  
Brushtail Possum ◽  
Simulation Studies ◽  
Eucalyptus Regnans ◽  
South Eastern ◽  
Eastern Australia ◽  
Mountain Ash ◽  
Central Highlands ◽  
Individual Based Simulation ◽  
South Eastern Australia

Statistical models of the patterns of den-tree choice by the mountain brushtail possum (Trichosurus caninus) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the central highlands of Victoria, south-eastern Australia are presented. These models enable us to predict, for a particular possum, the choice of den tree on the basis of patterns of recent den-tree usage and are required for individual-based simulation studies. The models show that the pattern of den-tree use is more complicated than might have been expected, in the sense that it is animal-specific, and that old animals exhibit more complicated patterns of den-tree choice than young ones.

The use of nest trees by the mountain brushtail possum (Trichosurus caninus) (Phalangeridae : Marsupialia). V. Synthesis of studies

1998 ◽  
Vol 25 (6) ◽  
pp. 627 ◽  
Author(s):  
D. B. Lindenmayer ◽  
A. Welsh ◽  
C. F. Donnelly
Keyword(s):  
Brushtail Possum ◽  
Adult Males ◽  
Eucalyptus Regnans ◽  
South Eastern ◽  
Eastern Australia ◽  
Mountain Ash ◽  
Central Highlands ◽  
General Synthesis ◽  
South Eastern Australia

A general synthesis is presented of the key results of a series of studies of den tree use by the mountain brushtail possum (Trichosurus caninus) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the central highlands of Victoria, south-eastern Australia. The project produced a range of unexpected results including (1) the number of den trees used, (2) the extent of den sharing, especially among adult males, (3) the overlap in denning ranges of animals, and (4) the predictability of transitions between den trees. Possible reasons for these findings are outlined. We also discuss the limitations of our study, how it could be improved if it were to be repeated, and some of the important implications of the findings for the management of forests where T. caninus occurs.

Use of Den Trees by Leadbeater's Possum (Gymnobelideus Leadbeateri)

1996 ◽  
Vol 44 (6) ◽  
pp. 625 ◽  
Author(s):  
DB Lindenmayer ◽  
RA Meggs
Keyword(s):  
Radio Tracking ◽  
Eucalyptus Regnans ◽  
Breeding Female ◽  
South Eastern ◽  
Risk Of Predation ◽  
Eastern Australia ◽  
Mountain Ash ◽  
Central Highlands ◽  
Leadbeater's Possum ◽  
South Eastern Australia

The results of a radio-tracking study of the uses of den trees by Leadbeater's possum (Gymnobelideus leadbeateri McCoy) at Cambarville in the mountain ash (Eucalyptus regnans) forests of the Central Highlands of Victoria, south-eastern Australia, are described. Animals were radio-tracked for three periods of 5-20 days in July 1990, November 1990 and July 1991. A total of 14 individuals was tracked and they occupied 11 different trees with hollows on the 10-ha study site. Preliminary findings showed that some animals moved between hollows in different trees, and most animals used two or more trees. The distances between utilised trees usually exceeded 50 m. Possible reasons for the den-swapping behaviour include attempts to either or both relieve burdens of ecto-parasites and to reduce the risk of predation. There were several examples, in each of the three radio-tracking periods, of two or more radio-collared adult breeding female animals simultaneously co-occupying the same nest tree. This result was different from some of the general findings of an earlier study of G. leadbeateri at Cambarville.

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