The O'ahu Invasive Species Committee (OISC) uses GIS tools to target and map invasive species across the island for control and eradication efforts. OISC focuses on high-threat species like Miconia, Cane Ti, and Little Fire Ant that can be feasibly controlled. GIS is used in both field surveys and office analysis to map infestations, monitor control progress over time, and model potential future spreads. OISC works collaboratively with various partners and agencies to protect native Hawaiian ecosystems and species from invasive threats.

1. GIS at the
O‘ahu Invasive Species
Committee
Jean Fujikawa
Operations Planner / Analyst
15 October 2015 Island Futures

2. ● Target high threat invasive species that aren’t
widespread and are feasible to control
● Support the efforts of mandated agencies
Island-based Invasive Species
Committees
● Voluntary partnerships of private, government and
non-profit organizations, and individuals united to meet
Hawai‘i’s invasive species challenges
● Target high threat invasive species that are not
widespread and are feasible to control
● Support the efforts of mandated agencies
Image from http://www.soest.hawaii.edu

3. prevent
What we do
control
eradicate

4. fly
OISC in action
hike
climb

5. Protect our island home

6. What makes a species invasive?
• Thrives in a variety of
habitats
• Grows quickly
• Reproduces quickly
• Lacks predators or
competitors
• Outcompetes native
species for resources
The worst invasive species change their environment,
typically to the exclusion of all other species.

7. Invaded forestO‘ahu’s native forest

8. GIS in the field

9. GIS in the office

10. 200m
600m
Scour
Survey
good
habitat
General survey process

12. Miconia
Miconia calvescens
Little Fire Ant
Wasmannia auropunctata
A few of OISC’s target species
More info: http://oahuisc.org
Cane ti
Tibouchina herbacea

13. OISC’s Main Target: Miconia

14. Miconia “the green cancer” in Tahiti

15. Miconia controlled and survey areas

16. ----800m----
Ground and Aerial 800m survey
area
----800m----

17. Miconia locations and survey
buffers

18. Survey area exceptions

19. Acres remaining: January

20. Acres remaining: October

21. Acres remaining: following January

22. Model of miconia spreading across the
watersheds of O‘ahu in the absence of
systematic control efforts
Plants
controlled
Model
year 10
Affected
Miconia in Tahiti Miconia model output -Mānoa

23. Cane Ti
(Tibouchina herbacea)

24. Cane Ti Infestation site:
Poamoho

25. Cane ti found in 2008 by
OANRP

26. Buffer in 2008

27. Survey progress through 2010

28. Survey progress through 2012

29. New plant locations in 2013

30. Survey progress 2013 - 2014

31. Survey progress 2013-2015

32. Little Fire Ant

33. Little Fire Ant Surveys
2011-2013

34. Little Fire Ant Infestation Area
May 2014

35. Little Fire Ant Infestation Area
Oct 2014

36. Little Fire Ant Infestation Area
February/March 2015

37. Little Fire Ant Infestation Area
April 2015

38. Little Fire Ant Infestation Area
August 2015

39. How you can help!
Wash your
hiking boots!
Report invasive
species!
Say YES when OISC
calls to request
permission to survey
your property
Check out our web
site
Test for little fire
ants

40. For more information
Little Fire Ant http://www.stoptheant.org/
OISC http://www.oahuisc.org/
Jean Fujikawa oiscgis@hawaii.edu
Mahalo!
• OISC field and office staff
• Rachel Neville (OISC Manager)
• All our volunteers, committee members, partners and funders
for their continuing support

41. Mānoa

42. Mānoa with Miconia Model Output

43. Miconia in Tahiti

44. Miconia in Tahiti

45. Mānoa with Miconia Model Output