fia phase 2 (p2) down woody material (dwm) update
DESCRIPTION
FIA Phase 2 (P2) Down Woody Material (DWM) Update. Larry T. DeBlander User Group Webinar April 13, 2010 Ogden, UT. FIA P2 DWM Update. DWM-general background IWFIA P2 DWM-data analysis IWFIA P2 DWM-examples of data uses Future P2 DWM-national vs. regional. FIA P2 DWM Update. - PowerPoint PPT PresentationTRANSCRIPT
FIA Phase 2 (P2) Down Woody FIA Phase 2 (P2) Down Woody Material (DWM) UpdateMaterial (DWM) Update
Larry T. DeBlander User Group Webinar
April 13, 2010Ogden, UT
FIA P2 DWM UpdateFIA P2 DWM Update
1. DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
FIA P2 DWM UpdateFIA P2 DWM Update
1. DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
FIA P2 DWM UpdateFIA P2 DWM Update
1. DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
FIA P2 DWM UpdateFIA P2 DWM Update
1. DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
FIA P2 DWM UpdateFIA P2 DWM Update
1. DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
Definition of DWMDefinition of DWMDead material within forests in various stages of decay
such as fallen trees, branches, and leaf litter
Three main uses of DWM Three main uses of DWM information:information:
1. Major component of forest biomass and carbon.
2. Fuels information for fire modeling and fire effects.
3. Wildlife/structure information.
Six Major DWM ComponentsSix Major DWM Components
Coarse Woody Debris (CWD)
Duff
Fine Woody Debris(FWD)
Litter
Line Intersect Sampling (LIS)Line Intersect Sampling (LIS)
All FWD and CWD pieces that intersect the plane of the transect are tallied by
transect diameter transect
DWM pieces
Fuel-Hour Classes (CWD and FWD)Fuel-Hour Classes (CWD and FWD)Transect Diameter Class Name Hour-Class
0.00-0.24 inches Small FWD 1-hour
0.25-0.99 inches
Medium FWD 10-hour
1.00-2.99 inches Large FWD 100-hour
3.00+ inches CWD 1000+-hour
The fuel "hour" class corresponds to the fuel diameter and is a direct reference to the amount of time it takes for an idealized cylinder of vegetation of that size to reach
equilibrium moisture content (the amount of time it takes for the material to dry out after being completely wet/soaked).
WildlifeWildlife
The DWM Inventory describes the amount
and condition of wildlife habitat through
estimation of coarse woody debris
attributes.
Point samplingPoint samplingAll Duff and Litter is sampled for depth and averaged by condition
Phase 3 DWM transect designPhase 3 DWM transect design
Key
430°
150°
270°
30°
150°
270°
30°
150°
270°
30°
150°
270°
3
2
1
Transect Information
FWD < 0.25”& 0.26”-0.99”
FWD 1.00”-2.99”
CWD => 3.00”
6 ft. s.d.
10 ft. s.d.
24 ft. h.d.
s.d.= slope dist., h.d.=horizontal dist.
Sub -plot
CWD Transect
FWD Transect
Distances between sub-plot points: 120 ft., Distance from sub-plot center and microplot center: 12 ft., Distance betweenSub-plot 1 and sub-plots 2, 3, and 4: 207.8 ft. at angles (degrees) 150, 210, and 270 respectively.
Litter and duff depth
12 - 24 ft transects for
CWD = 288 feet
IWFIA P2 Transect DesignIWFIA P2 Transect Design
• Three - 120 ft transects for CWD = 360 feet
• Three FWD transects at endpoints
• Three duff/litter point samples at transect endpoints
Number of DWM plots by State (P2 vs. P3) :Number of DWM plots by State (P2 vs. P3) :
StateState IWFIA P2 DWM IWFIA P2 DWM 2006-20092006-2009
P3 DWM P3 DWM 2001-20092001-2009
ArizonaArizona 1,534 (3,835)1,534 (3,835) 178 (196)178 (196)
ColoradoColorado 1,645 (4,113)1,645 (4,113) 214 (256)214 (256)
IdahoIdaho 1,524 (3,810)1,524 (3,810) 131 (183)131 (183)
MontanaMontana 1,818 (4,545)1,818 (4,545) 186 (242)186 (242)
Utah*Utah* 1,039 (3,460)1,039 (3,460) 167 (182)167 (182)
TotalTotal 7,560 (19,762)7,560 (19,762) 929 (1,112)929 (1,112)
*Does not yet include 2009 plots Plots in parenthesis are projected totals for a full cycle
FIA P2 DWM UpdateFIA P2 DWM Update
1. P2 DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
Data AnalysisData AnalysisObjective--Analyze IWFIA’s P2 CWD
biomass data to determine the effects of transect lengths on the confidence of estimates by forest types of varying average biomass and sample size.
Purpose--To use this empirical data to help decide on an efficient national DWM protocol design.
Assumptions:1.The CWD transect design dictates the overall
layout for all DWM components (CWD, litter/duff, FWD, etc).
2.This analysis contained four years of data for five annual states, which is about equivalent to doubling a full-cycle compliment of plots for one state.
Factors affecting analysis:– Not all plots sample one condition.– Not all plots sample 360 feet of transect length due to
snow, water, hazardous conditions, etc.– Analysis sub-sampled a possible 7,560 plots for those
with (1 condition and 360 feet) of transect sampled in order to compare transects of equal length.
– This resulted in 5,734 plots that sampled 57,329 pieces of CWD for this analysis.
Methods:• Calculated the average biomass of CWD pieces
by plot for 4 transect length samples (1-48’, 3-48’, 3-72’, 3-120’).
• Calculated percent standard errors by forest type and the 4 different transect lengths.
• Focused on the effects of percent standard errors on: 1) number of pieces/plots by forest type 2) high biomass types vs. low biomass types.
IWFIA P2 CWD Transect Design
• Three - 48 ft transects on subplots
• Three – 72 ft transects between subplots
Forest typenumber of
piecesn=# of plots
1-48' tons/ac
3-48' (144')
tons/ac
3-72' (216')
tons/ac
3-120' (360')
tons/ac
48' % std.
err.
144' % std.
err.
216' % std.
err.
360' % std.
err.Western redcedar 959 44 20.69 15.65 14.19 14.77 25.2 18.3 11.0 11.8 <10 Engelmann spruce-subalpine fir 3,601 153 11.99 11.24 11.63 11.48 10.1 7.1 7.2 6.6Western larch 1,311 61 10.52 10.42 11.81 11.25 14.2 11.7 14.7 12.5Subalpine fir 6,275 318 10.10 10.39 10.50 10.46 8.2 5.9 5.6 5.2Southwest white pine 18 2 11.98 5.57 13.16 10.12 100.0 88.0 54.8 62.1Blue spruce 283 13 6.13 9.34 10.40 9.97 22.5 37.2 14.4 17.0Western hemlock 426 18 10.13 10.16 8.95 9.43 20.8 16.1 12.6 12.6Engelmann spruce 5,193 300 8.05 8.97 9.52 9.30 9.1 6.0 6.4 5.9Grand fir 1,728 109 8.51 8.58 9.59 9.19 14.4 9.3 10.2 8.5Lodgepole pine 10,560 482 7.87 8.33 7.81 8.02 6.6 7.6 7.5 7.1Mountain hemlock 200 19 8.13 9.14 6.31 7.44 32.6 26.7 34.9 28.6 10-20White fir 559 32 5.14 6.11 7.30 6.82 25.7 14.8 13.9 11.6Whitebark pine 526 45 4.97 5.20 6.50 5.98 21.5 16.9 18.6 16.0Cottonwood-willow 21 2 4.25 6.47 4.48 5.28 52.3 70.2 87.9 79.2Foxtail-bristlecone pine 37 2 4.14 2.74 6.60 5.05 100.0 39.9 45.4 44.2Western white pine 23 2 1.36 4.11 5.16 4.74 100.0 100.0 100.0 100.0Aspen 4,875 267 4.95 4.63 4.80 4.73 12.5 7.9 8.1 7.2Douglas-fir 10,067 853 4.61 4.62 4.68 4.66 6.3 4.4 4.1 3.8Limber pine 210 27 4.79 2.19 5.02 3.89 30.4 32.4 30.6 24.2Ponderosa pine 2,844 520 2.30 2.51 2.98 2.79 10.5 7.0 6.5 5.5 20-30Paper birch 41 5 0.93 1.95 3.33 2.78 91.7 32.9 27.8 27.7Nonstocked 2,406 481 2.54 2.35 2.52 2.45 13.2 10.3 9.7 9.1Cottonwood 116 15 3.84 2.66 1.67 2.07 40.1 31.2 39.9 29.4Intermountain maple woodland 55 16 0.61 1.08 2.70 2.06 86.1 71.8 83.1 80.6Misc. western softwoods 22 4 0.00 1.22 2.57 2.03 #DIV/0! 51.9 63.4 53.7Evergreen oak woodland 335 95 1.79 1.84 1.81 1.82 26.9 25.6 21.0 18.8 >30 Pinyon-juniper woodland 3,522 1,060 1.27 1.40 1.28 1.33 10.6 6.6 5.6 5.1Western juniper 29 14 1.43 1.32 0.86 1.05 49.2 53.9 51.4 41.5Deciduous oak woodland 557 247 1.09 1.01 1.05 1.03 24.9 18.6 15.5 15.2Rocky Mountain juniper 167 75 0.56 0.74 1.04 0.92 37.9 23.1 25.8 21.7Cercocarpus woodland 23 16 0.46 0.43 0.48 0.46 62.0 65.5 39.1 48.2Juniper woodland 336 390 0.18 0.20 0.28 0.25 25.8 22.9 22.7 18.8Mesquite woodland 4 46 0.00 0.01 0.03 0.02 #DIV/0! 100.0 66.0 60.3Misc. western hardwoods woodland 0 1 0.00 0.00 0.00 0.00 #DIV/0! #DIV/0! #DIV/0! #DIV/0! 57,329 5,734 4.78 5.32 5.11
Forest typenumber of
piecesn=# of plots
1-48' tons/ac
3-48' (144')
tons/ac
3-72' (216')
tons/ac
3-120' (360')
tons/ac
48' % std.
err.
144' % std.
err.
216' % std.
err.
360' % std.
err.Pinyon-juniper woodland 3,522 1,060 1.27 1.40 1.28 1.33 10.6 6.6 5.6 5.1 <10 Douglas-fir 10,067 853 4.61 4.62 4.68 4.66 6.3 4.4 4.1 3.8Ponderosa pine 2,844 520 2.30 2.51 2.98 2.79 10.5 7.0 6.5 5.5Lodgepole pine 10,560 482 7.87 8.33 7.81 8.02 6.6 7.6 7.5 7.1Nonstocked 2,406 481 2.54 2.35 2.52 2.45 13.2 10.3 9.7 9.1Juniper woodland 336 390 0.18 0.20 0.28 0.25 25.8 22.9 22.7 18.8Subalpine fir 6,275 318 10.10 10.39 10.50 10.46 8.2 5.9 5.6 5.2Engelmann spruce 5,193 300 8.05 8.97 9.52 9.30 9.1 6.0 6.4 5.9Aspen 4,875 267 4.95 4.63 4.80 4.73 12.5 7.9 8.1 7.2Deciduous oak woodland 557 247 1.09 1.01 1.05 1.03 24.9 18.6 15.5 15.2Engelmann spruce-subalpine fir 3,601 153 11.99 11.24 11.63 11.48 10.1 7.1 7.2 6.6 10-20Grand fir 1,728 109 8.51 8.58 9.59 9.19 14.4 9.3 10.2 8.5Evergreen oak woodland 335 95 1.79 1.84 1.81 1.82 26.9 25.6 21.0 18.8Rocky Mountain juniper 167 75 0.56 0.74 1.04 0.92 37.9 23.1 25.8 21.7Western larch 1,311 61 10.52 10.42 11.81 11.25 14.2 11.7 14.7 12.5Mesquite woodland 4 46 0.00 0.01 0.03 0.02 #DIV/0! 100.0 66.0 60.3Whitebark pine 526 45 4.97 5.20 6.50 5.98 21.5 16.9 18.6 16.0Western redcedar 959 44 20.69 15.65 14.19 14.77 25.2 18.3 11.0 11.8White fir 559 32 5.14 6.11 7.30 6.82 25.7 14.8 13.9 11.6Limber pine 210 27 4.79 2.19 5.02 3.89 30.4 32.4 30.6 24.2 20-30Mountain hemlock 200 19 8.13 9.14 6.31 7.44 32.6 26.7 34.9 28.6Western hemlock 426 18 10.13 10.16 8.95 9.43 20.8 16.1 12.6 12.6Intermountain maple woodland 55 16 0.61 1.08 2.70 2.06 86.1 71.8 83.1 80.6Cercocarpus woodland 23 16 0.46 0.43 0.48 0.46 62.0 65.5 39.1 48.2Cottonwood 116 15 3.84 2.66 1.67 2.07 40.1 31.2 39.9 29.4Western juniper 29 14 1.43 1.32 0.86 1.05 49.2 53.9 51.4 41.5 >30 Blue spruce 283 13 6.13 9.34 10.40 9.97 22.5 37.2 14.4 17.0Paper birch 41 5 0.93 1.95 3.33 2.78 91.7 32.9 27.8 27.7Misc. western softwoods 22 4 0.00 1.22 2.57 2.03 #DIV/0! 51.9 63.4 53.7Foxtail-bristlecone pine 37 2 4.14 2.74 6.60 5.05 100.0 39.9 45.4 44.2Western white pine 23 2 1.36 4.11 5.16 4.74 100.0 100.0 100.0 100.0Cottonwood-willow 21 2 4.25 6.47 4.48 5.28 52.3 70.2 87.9 79.2Southwest white pine 18 2 11.98 5.57 13.16 10.12 100.0 88.0 54.8 62.1Misc. western hardwoods woodland 0 1 0.00 0.00 0.00 0.00 #DIV/0! #DIV/0! #DIV/0! #DIV/0! 57,329 5,734 4.78 5.32 5.11
Forest typenumber of
piecesn=# of plots
1-48' tons/ac
3-48' (144')
tons/ac
3-72' (216')
tons/ac
3-120' (360')
tons/ac
48' % std.
err.
144' % std.
err.
216' % std.
err.
360' % std.
err.Lodgepole pine 10,560 482 7.87 8.33 7.81 8.02 6.6 7.6 7.5 7.1 <10 Douglas-fir 10,067 853 4.61 4.62 4.68 4.66 6.3 4.4 4.1 3.8Subalpine fir 6,275 318 10.10 10.39 10.50 10.46 8.2 5.9 5.6 5.2Engelmann spruce 5,193 300 8.05 8.97 9.52 9.30 9.1 6.0 6.4 5.9Aspen 4,875 267 4.95 4.63 4.80 4.73 12.5 7.9 8.1 7.2Engelmann spruce-subalpine fir 3,601 153 11.99 11.24 11.63 11.48 10.1 7.1 7.2 6.6Pinyon-juniper woodland 3,522 1,060 1.27 1.40 1.28 1.33 10.6 6.6 5.6 5.1Ponderosa pine 2,844 520 2.30 2.51 2.98 2.79 10.5 7.0 6.5 5.5Nonstocked 2,406 481 2.54 2.35 2.52 2.45 13.2 10.3 9.7 9.1Grand fir 1,728 109 8.51 8.58 9.59 9.19 14.4 9.3 10.2 8.5Western larch 1,311 61 10.52 10.42 11.81 11.25 14.2 11.7 14.7 12.5 10-20Western redcedar 959 44 20.69 15.65 14.19 14.77 25.2 18.3 11.0 11.8White fir 559 32 5.14 6.11 7.30 6.82 25.7 14.8 13.9 11.6Deciduous oak woodland 557 247 1.09 1.01 1.05 1.03 24.9 18.6 15.5 15.2Whitebark pine 526 45 4.97 5.20 6.50 5.98 21.5 16.9 18.6 16.0Western hemlock 426 18 10.13 10.16 8.95 9.43 20.8 16.1 12.6 12.6Juniper woodland 336 390 0.18 0.20 0.28 0.25 25.8 22.9 22.7 18.8Evergreen oak woodland 335 95 1.79 1.84 1.81 1.82 26.9 25.6 21.0 18.8Blue spruce 283 13 6.13 9.34 10.40 9.97 22.5 37.2 14.4 17.0Limber pine 210 27 4.79 2.19 5.02 3.89 30.4 32.4 30.6 24.2 20-30Mountain hemlock 200 19 8.13 9.14 6.31 7.44 32.6 26.7 34.9 28.6Rocky Mountain juniper 167 75 0.56 0.74 1.04 0.92 37.9 23.1 25.8 21.7Cottonwood 116 15 3.84 2.66 1.67 2.07 40.1 31.2 39.9 29.4Intermountain maple woodland 55 16 0.61 1.08 2.70 2.06 86.1 71.8 83.1 80.6Paper birch 41 5 0.93 1.95 3.33 2.78 91.7 32.9 27.8 27.7Foxtail-bristlecone pine 37 2 4.14 2.74 6.60 5.05 100.0 39.9 45.4 44.2 >30 Western juniper 29 14 1.43 1.32 0.86 1.05 49.2 53.9 51.4 41.5Cercocarpus woodland 23 16 0.46 0.43 0.48 0.46 62.0 65.5 39.1 48.2Western white pine 23 2 1.36 4.11 5.16 4.74 100.0 100.0 100.0 100.0Misc. western softwoods 22 4 0.00 1.22 2.57 2.03 #DIV/0! 51.9 63.4 53.7Cottonwood-willow 21 2 4.25 6.47 4.48 5.28 52.3 70.2 87.9 79.2Southwest white pine 18 2 11.98 5.57 13.16 10.12 100.0 88.0 54.8 62.1Mesquite woodland 4 46 0.00 0.01 0.03 0.02 #DIV/0! 100.0 66.0 60.3Misc. western hardwoods woodland 0 1 0.00 0.00 0.00 0.00 #DIV/0! #DIV/0! #DIV/0! #DIV/0! 57,329 5,734 4.78 5.32 5.11
Data AnalysisData Analysis
Data AnalysisData Analysis
Data Analysis ConclusionData Analysis Conclusion1. Some forest types that are uncommon will probably never have
“good estimates” (better than 20 percent standard error) regardless of transect length.
• n< 250 pieces for high or low biomass forest types.• n<20 plots for high biomass types and n<80 plots for
low biomass types. 2. Greater than 360’ transect would require too much field time
(already over 1 hr. ave. per plot).3. Not sampling DWM on at least all the subplots causes problems
with under-sampling conditions and thus integrating DWM data with the tree data and other inventory components.
4. Therefore, a good compromise for P2 CWD transect length is between 48’ – 360’.
FIA P2 DWM UpdateFIA P2 DWM Update
1. P2 DWM-general background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
IWFIA P2 DWMIWFIA P2 DWM
1. All estimates (volume, biomass, carbon, etc.) are “per acre” at the plot/condition level.
2. Population estimates with expansion factors should be available this summer.
IWFIA P2 condition compiled variablesIWFIA P2 condition compiled variablesTransect Length
Population estimates (not finished)
CWD variables FWD variables Duff variables Litter variables Fire
CWD_TLFWD_SM_TLFWD_MD_TLFWD_LG_TL
COND_PROP_CWDCOND_PROP_FWD_SM COND_PROP_FWD_MD COND_PROP_FWD_LGCOND_PROP_DUFFCOND_PROP_LITTER
CWD_LINEALFT_ACCWD_CF_ACCWD_DRYBIOT_ACCWD_CARBON_AC
FWD_SM_CNTFWD_SM_CF_ACFWD_SM_DRYBIOT_ACFWD_SM_CARBON_ACFWD_MD_CNTFWD_MD_CF_ACFWD_MD_DRYBIOT_ACFWD_MD_CARBON_ACFWD_LG_CNTFWD_LG_CF_ACFWD_LG_DRYBIOT_ACFWD_LG_CARBON_AC
DUFF_DEPTHDUFF_BIOMASS_ACDUFF_CARBON_AC
LITTER_BIOMASS_ACLITTER_CARBON_ACLITTER_DEPTH
FLM
DWM component by state and type DWM component by state and type (7,560 plots)(7,560 plots)
Timber forest type (all states)Timber forest type (all states)
Woodland forest type (all states)Woodland forest type (all states)
Stand age by types (all states)Stand age by types (all states)
CWD large-end diameter class--20”+CWD large-end diameter class--20”+
Total forest biomass by component (Montana timber types)Total forest biomass by component (Montana timber types)
Effect groups from LANDFIRE Fuel Loading Models (FLM)Effect groups from LANDFIRE Fuel Loading Models (FLM)LANDFIRE (Lutes and others 2009)LANDFIRE (Lutes and others 2009)
Effect groups from 7,560 IWFIA plots run through LANDFIRE First Order Effect groups from 7,560 IWFIA plots run through LANDFIRE First Order Fire Effects Model (FOFEM) program (Duncan Lutes 2010)Fire Effects Model (FOFEM) program (Duncan Lutes 2010)
FLM plot/condition classifications are currently under review by LandFireFLM plot/condition classifications are currently under review by LandFire --When finalized they can be used as inputs to fire effects models to compute
smoke emissions, fuel consumption, and carbon released to the atmosphere.
FIA P2 DWM UpdateFIA P2 DWM Update
1. P2 DWM-background2. IWFIA P2 DWM-data analysis3. IWFIA P2 DWM-examples of data
uses4. Future P2 DWM-national vs.
regional
National DWM Transect Design4 - 48’ transects (192’ total)
225°
43
2
1
360°
90°
270°
45°
180°
135°
315°
Subplot
CWM transects
FWM transects
Litter and duff depth
Macroplot
Extra transect on
subplot option
Longer transect length on
macroplot option
Three Protocol Options:Three Protocol Options:
1.BASE Option - Simplified and more efficient to derive volume, biomass, and carbon.2.WILDLIFE/ECOLOGY Option - similar to existing P3 protocol with some additional efficiencies.3.RAPID ASSESSMENT Option - with maximum flexibility for one-time inventories of specific events (e.g., hurricanes).
National P2 DWM variablesNational P2 DWM variablesOPTION I: BASE (P2) OPTION II: WILDLIFE /
ECOLOGICAL (P3) ADDITIONAL OPTIONAL VARIABLES
BASE Layout Variables: Protocol Option, # Subplots, # Transects per Subplot, Transect Length
BASE Layout Variables Condition Level Variable: Condition Fuel Type Model #
Transect Line Segmenting: Subplot Num, Transect, Condition Class Number, Beginning Distance (HD), Ending Distance (HD), DWM Transect Sample Status, DWM Transect Non-Sample Reason
BASE Transect Line Segmenting Variables
BASE CWM Variables: Subplot Num, Transect, CWM Species, CWM Condition Class, CWM Decay Class, Intersect Diameter, Diameter of Hollow at Point of Intersection, Piece Inclination
BASE CWM Variables +:Large End Diameter, Length, Hollow, Small End Diameter
Optional CWM Variables (for OPTION I): Large End Diameter, Length, Hollow, Small End Diameter Optional CWM Variables (for all OPTIONs): Horizontal Distance, CWM History, % Log Fire Charred, Large End Diameter Class,
BASE Pile Variables: Pile Subplot Number, Pile Transect, Pile Beginning Distance, Pile Ending Distance, Pile Condition Class, Compacted Pile Height, Pile Species, Pile Decay Class
BASE Pile Variables
BASE FWM Variables: Subplot Number, Transect, Condition Class, FWM Transect Sample Status, FWM Transect Non-Sampled Reason, Small FWM Count, Medium FWM Count, Large FWM Count, High Count Reason
BASE FWM Variables
BASE Duff/Litter Depth Variables: Subplot Number, Transect, Condition Class, Duff/Litter Sample Status, Duff/Litter Non-Sampled Reason, Duff depth, Litter depth, Duff and Litter Method, Peat Sampling Method
BASE Duff/Litter Depth Variables
Optional Fuels Variable: Photo-series (Scott & Burgan 2005; RMRS-GTR-153)
Questions?Questions?
Larry T. DeBlander User Group Webinar
April 13, 2010Ogden, UT
Phone: 801-625-5204Email: [email protected]
Nonstocked types (all states)Nonstocked types (all states)
IWFIA P2 CWD Transect Design
• Three - 48 ft transects on subplots
• Three – 72 ft transects between subplots
Primary objectives for a national Primary objectives for a national P2/P3 DWM protocol: P2/P3 DWM protocol:
1. Provide flexibility for optional variables while maintaining a suite of base variables appropriate for consistency at both the P2 and P3 levels.
2. Develop an integrated (P2/P3) and efficient protocol with an emphasis on biomass and carbon estimation at the P2 level.
3. Facilitate future trend analysis and integrity of essential DWM components compatible with the current national protocol (P3).
4. Retain a national core protocol for DWM at the P3 plot level.