2012 User’s Group Meeting Data Collection Group
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Transcript of 2012 User’s Group Meeting Data Collection Group
2012 User’s Group Meeting Data Collection Group
Topic:Incorporating Flexibilities in FIA Data Collection Effort
Bob Ilgenfritz – Data Collection Group lead
Need for Greater Flexibility:
•Responsive to Budget fluctuations:▫ Increasing/decreasing or flat
•Responsive to new natural resource priorities or issues:▫ Carbon/Biomass/Urban/Others
Five FIA Flexibility Tools:
1. Subpaneling 2. Interpenetrating subsampling of subpanels3. Subsampling within plots4. Level of attribution sampling5. Temporal cycle lengths
Definitions•Panel – A complete set of FIA plots completed in a
state in a year.
•Subpanel – A equally proportional subset of a cycle with spatial distribution of plots across a state
•Cycle –The total of all plots in a state
•Sub-cycle – Number of subpanels (plots) done per year
1. Subpaneling• Each state’s panel is subdivided into 70 subpanels with roughly equal numbers of
plots in each subpanel.
• Why 70 subpanels?
• 10 year cycle in west and 7 year cycle in east with option to buy down to 5 year cycle.
5 year cycle = 14 subpanels/yr. 7 year cycle = 10 subpanels/yr. 10 year cycle = 7 subpanels/yr.
• Decreased budgets - Completing fewer subpanels per year increases cycle length and decreases the number of plots done per year
• Increased budgets - Completing more subpanels per year decreases cycle length and increases the number of plots done per year
2. Interpenetrating subsample of subpanels – P3 and P2+ plots
• Panel 70 subpanels subsample of each subpanel
▫Predetermined sample %▫Assure that subsample of subpanel is spatial too▫Subsample % of total plots is constant regardless of the
cycle length
• Past P3 – 1 of every 16 FIA plots is a P3 plot
• Current P2+ - 1 of every 8 FIA plots is a P2+ plot
2. Interpenetrating subsample of subpanels
•Future?▫Increase P2+ subsample size from 1 in 8 to:
3 in 16 – 3 X P3 sample 1 in 4 – 4 X P3 sample
▫Subsample size based on protocol type and respective window: Soils – Frost free soils window DWM - Snow free window Vegetation/Invasives/Regeneration – Leaf on window
3. Subsampling within plots•Not currently in use but:▫We could sample protocols or individual data items on
a subsample of the subplots, microplots or macroplots.
•Examples:▫Protocols:
Veg/DWM/Invasives/Crowns on fewer than all 4 subplots Advanced Seedling Tree Regeneration on fewer than all 4
microplots
4. Level of attribution sampling•Down Woody Materials:▫ Base – captures volume,
biomass, carbon, and fuel loads
▫Wildlife/ecological data - Base plus additional CWD structural variables for wildlife habitat (P3 protocols)
▫ Rapid assessment – customized protocol designed for disturbances Hurricanes, volcanoes, etc.
•P2 Vegetation Profile:▫ Level of Detail 1–
Vegetation structure▫ Level of Detail 2 – Veg
structure plus understory species composition
▫ Level of Detail 3 – Level of detail 2 plus overstory species composition
▫P3 Veg – Botanist identifies all veg species on sample plot
5. Temporal Cycle Length•Remeasurement cycle relative to protocol’s potential
for change.▫Less potential for change - longer remeasurement
cycle▫More potential for change – shorter remeasurement
cycle•Example:▫Soils and current 10 years remeasurement. Results of
first remeasurement may indicate need for longer cycle length.
2012 User’s Group Meeting - Data Collection Group
Topic:P2+
November 27, 2012
P3 Redesign in Summer 2012– What is “P2 +”• Leaf on “Window” Plots and an expansion of the P3 Sample:
▫ Carbon, Biomass, Vegetation Structure, Invasives, Wildlife, Fuel Loads, and Tree Regeneration
• Interpenetrating Sample of FIA Sub Panels
▫ Flexible and Consistent Sampling Percentages Regardless of Cycle Length
• Designed to Meet Data Collection Business Models
▫ Including Contractors and One Person Crews
• Less Detailed Data / Greater Sample Size
▫ Better suited for FIA’s strategic sample-based inventory
P2+ Protocols1. Crown Dieback and Uncompacted Crown Ratio2. Base Down Woody Material (DWM) 3. Vegetation Structure by Growth Habitat4. Invasive Plants5. ASTR - Advanced Seeding Tree Regeneration 6. Soils on P3 sample
Pros to P2+ •More plots for less or similar costs•More plots mean greater sample size, finer
resolution data, and greater utility to more users. Better meets the needs of a strategic inventory.
•Cost savings helped re-initiate FIA ecosystem indicators -DWM lite, Veg lite, Invasives, Crowns lite, regional protocol ASTR, and Soils.
P2 +Sample Size Implementation Schedule
•Summer 2012 – Double P3 Sample
▫1 of every 8 plots or 12.5%
•Summer 2013 – Same sample size as 2012
▫Evaluate time study from last summer. Identify P2+ protocols that are outliers
Redesign protocols if necessary
Questions???
P2+ Data•P2 Vegetation ▫Vegetation by growth habitat
Tally trees Non tally trees Shrubs/Vines Graminoids
▫Species composition ?????
P2+ Data•P2 DWM protocols – Down Woody Material▫Captures volume, carbon, biomass, and fuel loading
•Crowns ▫Uncompacted crown ratio▫Die back