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Judy Fisher

Relevance of invasive species information management tools for policy development and effective management. Judy Fisher. Biodiversity Information Community for Invasive Species Who should/could be the users of Information Tools? Policy Developers / Politicians Governments

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Judy Fisher

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  1. Relevance of invasive species information management tools for policy development and effective management Judy Fisher

  2. Biodiversity Information Community • for Invasive Species • Who should/could be the users of Information Tools? • Policy Developers / Politicians • Governments • Funders of Invasive Species management • Scientists • Restoration Ecologists • Biodiversity land managers • Community land managers

  3. Why do we need Biodiversity Information Tools for Invasive Species ? • Transformation of ecosystems through invasion is seen as one • of the major threats to the world’s biodiversity • (Millenium Ecosystem Assessment 2005) • Invaders threaten biodiversity to the same degree as: • human transformation of ecosystems and • production of green house gases (Sala et al 2000) • 2010 • Global international biodiversity targets aim to achieve a significant reduction in the rate of loss of biodiversity. Instrumental to this is the prevention, control and eradication of invasive species • (Convention on Biological Diversity 2003)

  4. Millennium Ecosystem Assessment (2005) “…tackling the drivers of biodiversity loss in an integrated manner is much more likely to achieve the 2010 targets than tackling them independently” What are the implications for data provision through Information Management Tools to assist an integrated approach to tackle the invasive species driver? Case Study Biodiversity Hot Spot

  5. Causes and consequences of invasion in a Biodiversity Hotspot: Implications for Information Management Tools

  6. The hypothesis: Invasion of Banksia woodland by the introduced species Ehrharta calycina and Pelargonium capitatum is accompanied by an alteration in ecosystem properties and processes (CONSEQUENCES) whereby the degree of change is related to fire frequency and abundance of introduced species (CAUSES)

  7. Banksia woodland Complex species–rich natural ecosystem major vegetation type of SW Aust coastal sandplain 15 to 90 km inland 400 kms along the coast

  8. Banksia woodland 6-8 metre Banksia attenuata Banksia menziesii

  9. scattered Eucalyptus gomphocephala 30 metres diverse shrub under- storey

  10. ECOSYSTEM RESEARCH Banksia Woodland Soil seedbank Soil compaction, moisture Vegetation cover Soil nutrients Leaf nutrients Disturbance history Invertebrates Environmental factors Good condition Medium condition Ehrharta calycinaPelargonium capitatum

  11. VegetationCover Summary- analysed data Soil seed bank seeds/m-2 Summary - analysed data

  12. Summary of native seed bank data, more detailed information than in summarised analysed data in previous seed bank graph

  13. Soil one component of summarised/analysed soil data, 60 samples x 8 variables tested, 3 conditions x 2 Mean P(Total) (mg kg-1) in the soil (5cm) beneath native and introduced species in different vegetation conditions in Banksia woodland, Bold Park

  14. Leaf dataGraph one nutrient Phosphorus 10 species x 4 replicates, 3 conditions x 2 replicates, 9 nutrients = 240 sets of data

  15. CAUSES

  16. Fire Frequency Statistical significance of the effect of number of fire events (1963-2000) on vegetation variables in Banksia woodland, southwestern Australia. Various plots (scatter, histograms, and normal probability) of the residuals were examined to ensure assumptions were met

  17. Canopy and Fire Frequency Relationship between number of fire events and canopy change

  18. Light Shade

  19. Solutions

  20. How do we utilise invasion mechanismsFIRE and SEED BANKto achieve clever and sustainable management interventions?

  21. Soil seed bank Germinants by depth Timing of germination

  22. Study Conclusion Understanding causes and consequences of invasion provides opportunities for creative management to mitigate past and adapt to future disturbance

  23. Consequences • Limited native soil seed bank • Very large invasive seed bank • Altered vegetation structure and composition • Increased soil and leaf phosphorus • Reduced canopy • Increased light • Less shade • PLUS Altered climatic conditions • Increased temperature • Less rainfall • Biodiversity / Invasive Species Information Management Tools can tell us which species are most likely to survive in the new ecosystem conditions created by frequent fire and invasion ?

  24. Utilise species adapted to new conditions

  25. Potential assisted migration

  26. Example • Invasive Species Scientist C M D’Antonio (California) • Visited Perth-invasion of Ehrharta calycina California (Fire) • How to manage the transformer, fire enhancing species ? • Had knowledge from Western Australian research been available through an • Invasive/ Biodiversity Information Tool • Rapid knowledge access providing Invasive Species Solutions • Prevent very slow re invention of the wheel • Reduce the loss of Biodiversity due to Invasive Species

  27. As a potential user of an integrated Biodiversity/ Invasive Species Information Tool, in addition to scientific knowledge for adaptive management, I would like the tool to help me: Convince decision makers that Biodiversity is valuable and essential to our future Convince decision makers that biodiversity must be maintained Convince decision makers that invasive species have a detrimental impact on our biodiversity Convince decision makers there is an economic advantage to investing in restoration to ensure biodiverse systems dominate invasive species

  28. And then when we have persuaded the decision makers I want to ensure the economic investment in maintaining, protecting and restoring our biodiversity is effective and leads to reduced loss of biodiversity due to invasion TOOL

  29. When developing standards lets consider how the data bases can most effectively maintain and reduce biodiversity loss We don’t have forever to halt the loss of biodiversity Change is occurring in an increasingly rapid rate To slow the loss of diversity we need as much global information as possible NOW The world’s economic decline may provide unforseen opportunities to better manage and maintain our biodiversity Without active up to date tools we may miss this window of opportunity and lose our biodiversity before the tools are ready to help us tackle their loss

  30. Overall Aim of the Tool Halt the Loss of Biodiversity Lets hope we do not loose too much Biodiversity while we are developing the tools

  31. Acknowledgements: Research utilized in this talk was conducted whilst a doctoral student with the School of Plant Biology, University of Western Australia with support from the Perth Botanic Gardens and Parks Authority Judy Fisher ecologist@waanthropologist.com 0407 984 091 Fisher Research Pty Ltd PO Box 169 Floreat Perth Western Australia 6014

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