INVASIVE SPECIES SURVEY TECHNIQUES: PLANT SURVEY€¦ · Invasive plant species management Four...
Transcript of INVASIVE SPECIES SURVEY TECHNIQUES: PLANT SURVEY€¦ · Invasive plant species management Four...
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INVASIVE SPECIES SURVEY TECHNIQUES: PLANT SURVEY
FISNA Workshop: Forest invasive species, forest health technologies and phytosanitary standards Kampala, Uganda 1-4 February 2012
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Introduction •The longer a non-indigenous
species goes undetected in a new area:
• Less opportunity to intervene
• Options for response become fewer & any intervention becomes more expensive and has less chance of success
•Prevention & early detection activities are vital in protecting forest environments from non-indigenous & possibly invasive species
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Invasive plant species management
Four phases:
1. Planning – identify land management goals (e.g. resource protection or conservation, production, etc.) & objectives
2. Inventory/survey – determine which species are present & their distribution
3. Monitoring – gather information on how populations change over time, impacts on ecosystem & impact of management practices
4. Management – use appropriate control methods (e.g. physical, chemical, silvicultural, biological) for eradication, suppression, containment, or restoration thereby reducing distribution & impact of invasive species
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Inventories and surveys
•Provide information necessary for assessing & prioritizing invasive plant management efforts
• Assess the status of invasive plant populations (e.g. location, distribution, abundance)
• Identify areas free of invasive plants
• Detect new invasive plant species or populations
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Inventories and surveys
•Conducted for different purposes, use a wide range of methods, & vary in scales & level of detail (resolution)
•Detailed inventories/surveys can provide baseline data for developing monitoring programmes
•Quantifying invasive plant status in a management area can help justify funding or support other requests
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Survey vs Inventory
•Survey = sampling the landscape at various points
• Inventory = censusing the entire landscape
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For consideration
•What is your objective?
•How will the data be used?
•What level of precision will be needed?
•What are your constraints?
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Typical survey objectives
•Early detection of new invaders
•Locate maximum number of species
•Locate most populations of a single (known) species
•Gather landscape-level data
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Use of data •Mapping – basic or more precise
•Modelling – to predict where species could occur in other landscapes
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Level of Data Precision
•Determine scale – low resolution vs high resolution
•Will determine how you develop and carry out your survey
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Constraints
•Money
•Time
•Landscape type
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Constraints •Survey technology – map &
compass, basic/fancy GPS
•Transportation availability – helicopter/plane, by foot, 4WD, animal, bicycles
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Survey categories
•Document distribution & abundance of invasive plant populations to make management decisions
Exploratory & Reconnaissance
•Provide further understanding of invasive plant populations/communities
Extensive & Intensive
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Survey types
•Exploratory •Sparse information
•Fast & efficient search
•Create basic map
•Extensive •More detailed
information
• Identify correlations between landscape & weeds
•Reconnaissance
•Some info known
•Detect new populations
•Obtain more gross information
•Intensive
•Gather most information
•Baseline for future monitoring
•Understand ecology
•Extrapolate data using modelling
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Survey methods
•Ground-based – by foot, animals (i.e. horses), bicycles, 4WD, etc.
•Aerial-based – helicopter, plane
•Remote platform
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Sampling methods
Point
Swath
Linear
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Data to collect General Plant Environment
Name of examiner Weed density Disturbance
Date of survey Weed percent cover Habitat
Area surveyed Weed status Slope
Type of survey Native species Aspect
Plant name (Latin, common, code)
Elevation
Infested area (presence)
Canopy cover of infestation
Property ownership
Source of data
Hydrologic unit
Location (lat/long, quad number & name)
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Summary of the management process
Set goals & objectives
Carry out surveys
Analyse information/ Baseline
Determine monitoring populations
Test control methods
Monitor effectiveness of control methods
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More information
• Information from this presentation has been adapted from materials available from a variety of sources including:
•US Fish and Wildlife Service: www.fws.gov/invasives/staffTrainingModule/index.html
•Centre for Invasive Plant Species Management: www.weedcenter.org/management/index.html
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THANK YOU!
FISNA Workshop: Forest invasive species, forest health technologies and phytosanitary standards Kampala, Uganda 1-4 February 2012