Kakadu National Park Landscape Symposia Series 2007–2009
1 Parks Australia North
Published by
Supervising Scientist Division
GPO Box 461, Darwin NT 0801
January 2010
Registry File SG2009/0280
(Release status – unrestricted)
How to cite this report:
Winderlich S (ed) 2010. Kakadu National Park Landscape Symposia Series 2007–2009. Symposium 2: Weeds management. 27–28 November 2007, Jabiru Field Station, Supervising Scientist Division, Kakadu National Park. Internal Report 565, January, Supervising Scientist, Darwin.
How to cite papers in this report – exanple:
Walden D 2010. The need for weed data. In Kakadu National Park Landscape Symposia Series 2007–2009. Symposium 2: Weeds management. ed S Winderlich, 27–28 November 2007, Jabiru Field Station, Supervising Scientist Division, Kakadu National Park. Internal Report 565, January, Supervising Scientist, Darwin, 29–31.
Location of final PDF file in SSD Explorer:
\Publications Work\Publications and other productions\Internal Reports (IRs)\Nos 500 to 599\
Editor of this report:
Steve Winderlich – Kakadu National Park, Parks Australia North, PO Box 71, Jabiru NT 0886, Australia
The Supervising Scientist is part of the Australian Government Department of the Environment, Water, Heritage and the Arts.
© Commonwealth of Australia 2009
Supervising Scientist
Department of the Environment, Water, Heritage and the Arts
GPO Box 461, Darwin NT 0801 Australia
This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the Supervising Scientist. Requests and inquiries concerning reproduction and rights should be addressed to Publications Inquiries, Supervising Scientist, GPO Box 461, Darwin NT 0801.
e-mail: publications_ssd@environment.gov.au
Internet: www.environment.gov.au/ssd (www.environment.gov.au/ssd/publications)
The views and opinions expressed in this report do not necessarily reflect those of the Commonwealth of Australia. While reasonable efforts have been made to ensure that the contents of this report are factually correct, some essential data rely on the references cited and the Supervising Scientist and the Commonwealth of Australia do not accept responsibility for the accuracy, currency or completeness of the contents of this report, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the report. Readers should exercise their own skill and judgment with respect to their use of the material contained in this report.
Printed and bound in Darwin NT by Supervising Scientist Division
Edited by S Winderlich1 i
List of participants vii
Acknowledgments viii
S Wingrave 3
2.1 Introduction 3
2.2 The National Weeds Strategy 3
Goal 1 Prevent new weed problems 4
Goal 2 Reduce the impact of existing priority weeds problems 4
Goal 3 Enhance Australia’s capacity and commitment to solve weed problems 4
2.3 The Weeds of National Significance 5
Program 1 Information and education 6
Program 2 Prevention of spread 7
Program 3 Research and development 7
Program 4 Impact reduction 7
2.4 WoNS species and strategic weed management in the Northern Territory 7
2.5 Regional weed management: Darwin region 9
2.6 Local weed management: Kakadu National Park 9
References 11
K Ferdinands, S Setterfield & M Ibbett 13
3.1 Focus summary 13
The Paper 14
3.2 Introduction 14
3.3 A WRM system for the Northern Territory 14
3.3.1 Development of the NT WRM system 16
3.3.2 Application of the NT WRM system 18
3.4 Challenges and impediments to the strategic management of weeds in northern Australia 22
References 22
Acknowledgments 22
F Hunter, M Ibbett & B Salau 23
4.1 Focus summary 23
The Paper 23
4.2 Introduction 23
4.2.1 Mimosa pigra 24
4.2.2 Salvinia molesta 24
4.2.3 Olive hymenachne 26
4.2.4 Para grass 27
4.2.5 Mission grass 28
4.2.6 Gamba grass 28
4.3 Conclusion 29
References 29
D Walden 30
5.1 Data for decisions 30
References 32
J Boyden, R Bartolo1, D Walden1 & P Bayliss 33
6.1 Introduction 33
6.2 Very high resolution (VHR) satellite imagery for mapping weeds 34
6.3 Optimising the quality of weed maps 36
6.4 Applications of mapping information 37
6.5 Weed risk assessment modelling 38
6.6 Conclusions and recommendations 38
References 39
HT Murphy, DA Westcott & C Fletcher 41
7.1 Introduction 41
7.2 Generating dispersal curves for weeds 41
7.3 Dispersal ecology and weed management 42
7.3.1 Example of a model of spread for Miconia calvescens 44
7.4 Conclusions 46
References 47
G Kyle, M Gardener & M Ibbett 48
8.1 Focus summary 48
Community consultation 48
The Paper 48
8.1 Introduction 48
8.2 The Weedy Time Bomb Project: background and project design 49
8.3 Implementation of the project 50
8.3.1 Selection of target species 50
8.3.2 Community consultation 51
8.3.3 The next steps 52
8.4 Acknowledgments 52
8.5 Postscript 52
References 52
M Ibbett 53
9.1 Focus summary 53
9.2 Introduction 53
9.3 Identifying and managing priority weed species 54
9.3.1 Management issues 54
Marlkawo: Mann River & Bulman (grader and mission grass) 54
Barwananga – Maningrida – mission grass – outstations and roadsides – hunting/ fishing camps (but distribution not exactly known and needs work). 54
Adjamarrl – can’t access in wet. No gamba grass found, some grader (2 infestations on tracks) green panic, passion fruit, some mission grass (Marlwon) 54
High Plateau – mission grass need more information. 54
9.3.2 Knowledge gaps 54
9.3.3 Moving forward 54
9.4 Resource acquisition and allocation 55
9.4.1 Management issues 55
9.4.2 Knowledge gaps 55
9.4.3 Moving forward 55
9.5 Data management and knowledge sharing 55
9.5.1 Management issues 55
9.5.2 Knowledge gaps 56
9.5.3 Moving forward 56
9.6 Community education 56
9.6.1 Management issues 56
9.6.2 Knowledge gaps 56
9.6.3 Moving forward 56
9.7 Integrated management of weeds and other issues 56
9.7.1 Management issues 56
9.7.2 Knowledge gaps 56
9.7.3 Moving forward 57
9.8 Understanding the impacts and costs of weeds 57
9.8.1 Management issues 57
9.8.2 Knowledge gaps 57
9.8.3 Moving forward 57
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