THE IMPACT OF WEEDS ON THREATENED PLANTS REPORT NO 164

Author(s): REID VA

Weeds & Control | Conservation


Product Information

Abstract 5 


1. Introduction 6 


1.1 Background 6 


1.2 Definitions 6 


1.2.1 Threat categories from New Zealand Botanical Society List 7 


1.2.2 Species Priority Ranking System 7 


1.3 Information sources 7 


2. The data 8 


3. Summary of data 9 


3.1. Characteristics of threatened 9 


3.2. Comparison of threatened plants and ecological weeds 10 


3.3 How serious is the weed threat? 10 


3.4. Weed growth 11 


3.5 Threatened plants and weed heights 12 


3.6. Habitat 13 


3.7. Regeneration 14 


3.8 Weeds that support threatened plants 14 


4. What weeds do 16 


4.1 Weeds and other threats to threatened plants 16 


4.1.1 Amphibromus fluitans 16 


4.1.2 Melicytus flexuosus 17 


4.2 Features of threatened plants making them vulnerable to weeds 17 


4.3 The ways weeds threaten 18 


4.3.1 Competition 18 


4.3.2 Environmental changes caused by weeds 19 


4.3.3 Environmental changes allowing weed problems 20 


5. Current management 22 


 


6. Research and associated management 23 


7. Conclusion 25 


8. Acknowledgements 27 


9. References 28 


10. Personal communications 30 


Appendix 1 


Glossary of weed names used in the text 31 


Appendix 2 


Threat categories summarised by Cameron et al. (1995) 32 


Appendix 3 


Database Tables and Fields 33 


Appendix 4 


Threatened Plants affected by Weeds Database (abridged) 35 


Appendix 5 


Weeds of threatened plants not currently listed . . . in Owen (1997) 67 

General Fields

  • : 9780478217636
  • : DOC
  • : DOC
  • : November 1998
  • : New Zealand
  • : books

Special Fields

  • : REID VA
  • : P
  • : 67