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Determination of the biodiversity at risk from lantana invasion

Pest Management Unit, Parks and Wildlife Division, Department of Environment and Climate Change, PO Box 1967, Hurstville, New South Wales 1481, Australia. Determination of the biodiversity at risk from lantana invasion. Pete Turner and Paul Downey. managing lantana for biodiversity. given:

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Determination of the biodiversity at risk from lantana invasion

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  1. Pest Management Unit, Parks and Wildlife Division, Department of Environment and Climate Change, PO Box 1967, Hurstville, New South Wales 1481, Australia. Determination of the biodiversity at risk from lantana invasion Pete Turner and Paul Downey

  2. managing lantana for biodiversity • given: • lantana is widespread • control is not possible across entire range and • control does not necessarily lead to biodiversity conservation

  3. managing lantana for biodiversity • given: • lantana is widespread • control is not possible across entire range and • control does not necessarily lead to biodiversity conservation • to get the maximum benefit from our control programs • aimed at protecting biodiversity, we need to undertake • control where the benefits to biodiversity would be the • greatest

  4. managing lantana for biodiversity • given: • lantana is widespread • control is not possible across entire range and • control does not necessarily lead to biodiversity conservation • to get the maximum benefit from our control programs • aimed at protecting biodiversity, we need to undertake • control where the benefits to biodiversity would be the • greatest • this requires information on the biodiversity at risk and • site information

  5. Impacts of weeds on threatened biodiversity in NSW • lantana threatens 10% of all listed species in NSW • the most commonly recorded weed threat key publications to determine biodiversity at risk

  6. Impacts of weeds on threatened biodiversity in NSW • lantana threatens 10% of all listed species in NSW • the most commonly recorded weed threat • Weed Impacts to Native Species (WINS) assessment process • Bitou Bush Threat Abatement Plan key publications to determine biodiversity at risk

  7. talk outline • background and overview of NSW Bitou Threat Abatement Plan (TAP) • how the Bitou TAP is being applied nationally for lantana • identification of biodiversity at risk (round table) • mapping and site information

  8. the bitou bush experience in NSW (Chrysanthemoides monilifera)

  9. support for the Bitou Threat Abatement Plan (TAP) 1. Bitou TAP positively received 2. NHT funding secured to implement the Bitou TAP [ $1.6M over 3 years for implementation]

  10. support for the Bitou Threat Abatement Plan (TAP) 1. Bitou TAP positively received 2. NHT funding secured to implement the Bitou TAP [ $1.6M over 3 years for implementation] 3. Defeating the Weeds Menace funding secured to develop and implement a national lantana strategy based on the Bitou TAP

  11. Key Threatening Process in NSW Lantana and bitou invasion listed as a key threatening process in NSW TAP Objective:abate, ameliorate or eliminate the threat posed by the KTP to threatened biodiversity [ listing process outlined under the TSC Act ]

  12. Key Threatening Process in NSW Lantana and bitou invasion listed as a key threatening process in NSW TAP Objective:abate, ameliorate or eliminate the threat posed by the KTP to threatened biodiversity Question: what is the biodiversity threatened? [ listing process outlined under the TSC Act ]

  13. bitou bush TAP species threatened by bitou bush Sources in Number of chronological plant species order at risk in NSW KTP nomination 3 National Strategy (WONS) 6 Draft TAP 63 Final TAP 158 KTP = key threatening process TAP = threat abatement plan

  14. bitou bush TAP Weed Impacts to Native Species (WINS) assessment process: 1 literature + research/unpublished data 2 workshops involving people working with bitou bush or native species 3 draft list of species circulated and reviewed 4 model final list of species stage

  15. bitou bush TAP Approximately 65% are not listed under the NSW Threatened Species Conservation Act 1995. However, examination of species at risk other than plants has not been undertaken to the same extent (ie. for animals).

  16. Applying the TAP process for lantana nationally

  17. a plan for biodiversity conservation • control is undertaken where the benefits to biodiversity are the greatest • by knowing the species at risk control techniques and recovery actions can be tailored • monitor the outcomes of control and adapt management as needed • limit detrimental effects to • native species following • control • prevent re-infestation or weed • substitution

  18. assessing the biodiversity at risk: applying the WINS assessment process to lantana

  19. determining biodiversity at risk Weed Impacts to Native Species (WINS) assessment process: 1 literature + research/unpublished data 2 workshops involving people working with lantana or native species (across lantana’s range) 3 draft list of species circulated and reviewed 4 final list of species or communities ranked stage

  20. biodiversity at risk species threatened by lantana (2006) Stage 1 of WINS assessment: Number of Number of plant species animal species Year at risk at risk 2002 20 2003 24 2004 32 2005 45 2 2005 * 160 21 2006 #165 23 * trial of the WINS approach from 2 workshops only (Lismore and Brisbane) # this assessment was of the NSW Threatened Species Act only (see Coutts-Smith & Downey 2006)

  21. determining the impacts across NSW & Qld Stage 2 of WINS assessment: • Workshops • discussion on all biodiversity potentially at risk • reasons why at risk • develop interim list of species

  22. determining the impacts across NSW & Qld Workshop locations Distribution of lantana within NSW and Qld as well as within Natural Resource Management Bodies (or Catchment Management Authorities)

  23. today’s workshop Stage 2 of WINS assessment: • Aim to compile: • a list of species affected by lantana • justification for inclusion of the species at risk using standard codes or terms • sources of the information • vegetation type associated with each species

  24. justification terms and codes NP The native species is not present in infested areas of that species’ typical vegetation community or range. This can be determined by comparing infested and un-infested sites, as well as anecdotal or observational data about declines following invasion. D There is clear evidence that the weed displaces the native species. For example, the native occurs at lower than ‘normal’ densities in invaded sites, but is not totally out-competed or excluded. OCS Suppresses the native species by reducing individual’s vigour or reproductive output. RP Recruitment is prevented. ie. adult population is at 'normal' or 'near-normal’ density, but no or few juveniles are present. CAR The native species is considered at risk, but more information is needed to determine the level of risk. Negative impacts:

  25. justification terms and codes AH+ There is clear evidence that the weed provides an additional habitat for the native species. For example, the native species occurs at higher than ‘normal’ densities in invaded sites. P+ The weed promotes the native species by increasing individual’s vigour or reproductive output through such things as increased resources, providing food for animals or changes to soil characteristics. Positive impacts:

  26. justification terms and codes AH+ There is clear evidence that the weed provides an additional habitat for the native species. For example, the native species occurs at higher than ‘normal’ densities in invaded sites. P+ The weed promotes the native species by increasing individual’s vigour or reproductive output through such things as increased resources, providing food for animals or changes to soil characteristics. N Animals have switched to utilising the weed as a result of native vegetation being replaced by lantana, but there has been no change in their overall density or condition. Positive impacts: Neutral:

  27. what’s next verifying and finalising the biodiversity at risk

  28. determining the biodiversity at risk • revise interim list (stage 3 of the WINS) • - interim list will be placed on the web site for • comment and revision • revise and finalise list of species at risk

  29. knowing the biodiversity at risk is only half the management problem: selecting sites for control

  30. information needed to rank sites • What we need to select sites: • list of sites • site attributes • maps • process to rank sites for control

  31. site selection process from Bitou TAP ranking sites: • effectiveness of control at site • (is control possible and effective) • actual impact • (degree of impact posed to native species) • condition • 1 of the species (popn vs whole range) • 2 other threats present

  32. future draft plan available by the end of the year monitoring guidelines to be developed as part of the project some of the priority sites will receive initial funding (in 2008/09 - $360K)

  33. further information Refer to our web-site for further information on WINS system and the development of the lantana plan Go to:http://www.nationalparks.nsw.gov.au/npws.nsf/Content/Lantana_threat_to_biodiversity Email: lantana.plan@environment.nsw.gov.au

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