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Canterbury Regional Council Wilding Conifer Survey 2008-2013

Canterbury Regional Council Wilding Conifer Survey 2008-2013. Report No. R13/45 Phillip Cochrane Philip Grove. Survey Area and Costs. 2,400,935 Hectares surveyed 4,220,000 Hectares in region (57%) Five year survey Cost around $150,000 - $200,000. Methods. Print maps (aerial photos)

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Canterbury Regional Council Wilding Conifer Survey 2008-2013

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  1. Canterbury Regional Council Wilding Conifer Survey 2008-2013 Report No. R13/45 Phillip Cochrane Philip Grove

  2. Survey Area and Costs • 2,400,935 Hectares surveyed • 4,220,000 Hectares in region • (57%) • Five year survey • Cost around $150,000 - $200,000

  3. Methods • Print maps (aerial photos) • Locate single trees and stands on maps • Record attributes • Digitise into GIS

  4. What did we record? • Planted Trees • Planting type • Species • Spread risk • Coning • Fringe spread • Outlier Trees • Stem spacing • Species • Coning • Height • Surrounding veg • Downwind veg

  5. Hectares with wilding tree presence • 80,493 hectares affected with wilding spread • 3.4% of survey area (2,400,935 ha) • 2008-2013 • Increase from 2.7% (2,330,906 ha) • 1998-2003

  6. Number of sites with fringe spread • Initial survey - 23% of 765 sites with fringe spread • Recent resurvey - 40% of 763 sites with fringe spread • Increase of 17% in 10 years

  7. Wiling Conifer Survey 2008-2013

  8. Field survey and data entry by: Phillip Cochrane Norm Daniels Philip Grove Katherine Hill Mark Parker Mirella Pompei Frances Schmechel Acknowledgements We would like to acknowledge the participation of landowners and: Nick Ledgard Dean Turner (DOC Rangiora) Peter Willemse (DOC Twizel)

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