Hawaii Pacific GIS Conference 2012: Disaster Management and Emergency Response II - Using ArcGIS to...
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Using ArcGIS to Prioritize
Invasive Plant Control
Jean Fujikawa (Operations Planner / Analyst)
Hawai‘i Pacific GIS Conference
March 5, 2012
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Agenda
• OISC overview
– who we are
– our target species
– miconia model example
• Evaluating potential species for control
using ArcGIS
– OED survey and evaluation
– OISC delimiting surveys
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The O‘ahu Invasive Species Committee (OISC) is a voluntary
partnership of private, governmental and non-profit organizations
and individuals united to prevent new invasive species infestations
on the island of O‘ahu, to eradicate incipient invasive species, and
to stop established invasive species from spreading.
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Miconia
Miconia calvescens
Fountain
grass
Pennisetum setaceum
Himalayan
Blackberry
Rubus discolor
Coqui Frog
Eleutherodactylus coqui
Little Fire
Ant Wasmannia auropunctata
Beardgrass
Andropogon glomeratus
var. pumila
Cane
tibouchina
Tibouchina herbacea
Pampas
grass
Cortaderia spp.
Some of OISC’s target species
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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
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OED refers high threat / low
distribution species to OISC
• After road, nursery and reported species OED had list of 1797 species.
• Of the 1797 species 56 species were determined to be – present on the island but of low distribution,
– weedy,
– could be scored by the Hawai‘i Pacific Weed Risk Assessment (HPWRA)
• After doing full assessments of the 56 of 16 species were chosen which high practicality of control and high weediness scores
• OISC will delimit these 16 species and select which are feasible to eradicate
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Species recommended for control
by OED (first round)
• Caesalpinia crista
• Chromolaena odorata
• Cordia alliodora
• Cryptostegia
grandiflora
• Delairea odorata
• Imperata cylindrica
• Melinis nerviglumis
• Nassella tenuissima
• Parkinsonia aculeata
• Pennisetum villosum
• Pereskia aculeata
• Piper aduncum
• Rauvolfia vomitoria
• Senna artemisioides ssp. filifolia
• Setaria sphacelata
• Suriana maritima
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Species recommended for control
Caesalpinia
crista
Delairea
odorata
Cordia
alliodora
Chromolaena
odorata
Melinis
nerviglumis
Cryptostegia
grandiflora
Nassella
tenuissima
Imperata
cylindrica
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Species recommended for control
Parkinsonia
aculeata
Rauvolfia
vomitoria
Pereskia
aculeata
Pennisetum
villosum
Setaria
sphacelata
Piper
aduncum
Suriana
maritima
Senna
artemisioides
ssp. filifolia
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Distribution of
potential OISC
target species
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200m
600m
Scour
No plants
found in
200m
=
Survey
good
habitat
Plants
found in
200m
or
600m good
habitat
survey
=
Scour
General survey decision process
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General survey decision process
However, we need
permission from land
owners at each phase
of our surveys
• Hopefully they say
YES!
• If access cannot be
obtained, we document
our activity and move
the species lower on
our priority list
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Tracking progress with ArcGIS
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Potential species for control layout
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Checking on buffers, terrain, roads,
trails and land ownership
•Pink: buffers, plant locations
•Orange: property boundaries
•Yellow: trails
•Blue: streams
•Gray: roads
•Brown: > 45 degree slope
•Background: 1ft imagery
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Evaluated by OED Sites 200m
buffer
Survey
review
600m
buffer
Survey
review
Pop
extent
Caesalpinia crista 1 in prog.
Chromolaena odorata 2 in prog.
Cordia alliodora 3
Cryptostegia grandiflora 1
Delairea odorata 1 done cont. in prog. almost
Imperata cylindrica 2
Melinis nerviglumis 3 in prog. access / trt
Nassella tenuissima 3 in prog.
Parkinsonia aculeata
2 done
cont. done defined
Partial table for tracking our
delimiting survey progress
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private property
left to survey
~20
plants
Caesalpinia
crista
Tantalus
200m
buffer
Tantalus
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Pennisetum villosum
Aiea
200m buffer
Aiea
Kahala
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Rauvolfia vomitoria and
Setaria sphacelata buffer overlap
Kāne‘ohe
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Cryptostegia grandiflora - 200m buffer
~ 5-10 plants
per point
Kalaeloa
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Model: Land ownership summary
• Buffer species points 200m and 600m
• Clip parcels
• Dissolve on landowner
• Result: number of different landowners, parcels per landowner, and acres
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Summary
• Using ArcGIS throughout the evaluation process
• Standard format for dealing with each species at
each site, however, each situation is unique
• Early detection will prevent "the next miconia"
from happening
• If you’re are ever contacted by your local ISC for
permission to survey and control on your
property, please say YES!
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Mahalo!
• Supervisor (Rachel Neville)
• Co-workers at OISC, OED
• All our volunteers, committee members, partners
and funders for their continuing support
Jean Fujikawa - [email protected]
OISC - http://www.oahuisc.org
HWRA - http://www.botany.hawaii.edu/faculty/daehler/wra/