Transcript FIA Phase 2 (P2) Down Woody Material (DWM) Update Larry T. DeBlander User Group Webinar April 13, 2010 Ogden, UT.

FIA Phase 2 (P2) Down Woody
Material (DWM) Update
Larry T. DeBlander
User Group Webinar
April 13, 2010
Ogden, UT
FIA P2 DWM Update
1. DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
FIA P2 DWM Update
1. DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
FIA P2 DWM Update
1. DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
FIA P2 DWM Update
1. DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
FIA P2 DWM Update
1. DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
Definition of DWM
Dead material within forests
in various stages of decay
such as fallen trees,
branches, and leaf litter
Three main uses of DWM
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 Components
Coarse Woody Debris
(CWD)
Duff
Fine Woody Debris
(FWD)
Litter
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)
Transect
Diameter
0.00-0.24
inches
0.25-0.99
inches
1.00-2.99
inches
3.00+ inches
Class Name
Hour-Class
Small FWD
1-hour
Medium
FWD
10-hour
Large FWD
100-hour
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).
Wildlife
The DWM Inventory
describes the amount
and condition of
wildlife habitat through
estimation of coarse
woody debris
attributes.
Point sampling
All Duff and Litter is sampled for
depth and averaged by condition
Phase 3 DWM transect design
30°
2
Litter and
duff depth
Transect Information
270°
6 ft. s.d.
12 - 24 ft
transects for
CWD = 288 feet
10 ft. s.d.
150°
30°
24 ft. h.d.
CWD => 3.00”
s.d.= slope dist., h.d.=horizontal dist.
30°
150°
270°
FWD 1.00”2.99”
1
270°
4
FWD < 0.25”
& 0.26”-0.99”
30°
Key
3
Sub -plot
270°
CWD Transect
FWD Transect
150°
150°
Distances between sub-plot points: 120 ft., Distance from sub -plot center and microplot center: 12 ft., Distance between
Sub-plot 1 and sub-plots 2, 3, and 4: 207.8 ft. at angles (degrees) 150, 210, and 270 respectively.
IWFIA 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) :
State
IWFIA P2 DWM
2006-2009
P3 DWM
2001-2009
Arizona
1,534 (3,835)
178 (196)
Colorado
1,645 (4,113)
214 (256)
Idaho
1,524 (3,810)
131 (183)
Montana
1,818 (4,545)
186 (242)
Utah*
1,039 (3,460)
167 (182)
Total
7,560 (19,762)
929 (1,112)
*Does not yet include 2009 plots
Plots in parenthesis are projected totals for a full cycle
FIA P2 DWM Update
1. P2 DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
Data Analysis
Objective--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’, 348’, 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 type
Western redcedar
Engelmann spruce-subalpine fir
Western larch
Subalpine fir
Southwest white pine
Blue spruce
Western hemlock
Engelmann spruce
Grand fir
Lodgepole pine
Mountain hemlock
White fir
Whitebark pine
Cottonwood-willow
Foxtail-bristlecone pine
Western white pine
Aspen
Douglas-fir
Limber pine
Ponderosa pine
Paper birch
Nonstocked
Cottonwood
Intermountain maple woodland
Misc. western softwoods
Evergreen oak woodland
Pinyon-juniper woodland
Western juniper
Deciduous oak woodland
Rocky Mountain juniper
Cercocarpus woodland
Juniper woodland
Mesquite woodland
Misc. western hardwoods woodland
number of n=# of
pieces
plots
959
3,601
1,311
6,275
18
283
426
5,193
1,728
10,560
200
559
526
21
37
23
4,875
10,067
210
2,844
41
2,406
116
55
22
335
3,522
29
557
167
23
336
4
0
44
153
61
318
2
13
18
300
109
482
19
32
45
2
2
2
267
853
27
520
5
481
15
16
4
95
1,060
14
247
75
16
390
46
1
57,329
5,734
3-48'
3-72'
3-120'
48'
144' 216'
360'
1-48'
(144')
(216')
(360') % std. % std. % std. % std.
tons/ac tons/ac tons/ac tons/ac err.
err.
err.
err.
20.69
11.99
10.52
10.10
11.98
6.13
10.13
8.05
8.51
7.87
8.13
5.14
4.97
4.25
4.14
1.36
4.95
4.61
4.79
2.30
0.93
2.54
3.84
0.61
0.00
1.79
1.27
1.43
1.09
0.56
0.46
0.18
0.00
0.00
15.65
11.24
10.42
10.39
5.57
9.34
10.16
8.97
8.58
8.33
9.14
6.11
5.20
6.47
2.74
4.11
4.63
4.62
2.19
2.51
1.95
2.35
2.66
1.08
1.22
1.84
1.40
1.32
1.01
0.74
0.43
0.20
0.01
0.00
14.19
11.63
11.81
10.50
13.16
10.40
8.95
9.52
9.59
7.81
6.31
7.30
6.50
4.48
6.60
5.16
4.80
4.68
5.02
2.98
3.33
2.52
1.67
2.70
2.57
1.81
1.28
0.86
1.05
1.04
0.48
0.28
0.03
0.00
14.77
11.48
11.25
10.46
10.12
9.97
9.43
9.30
9.19
8.02
7.44
6.82
5.98
5.28
5.05
4.74
4.73
4.66
3.89
2.79
2.78
2.45
2.07
2.06
2.03
1.82
1.33
1.05
1.03
0.92
0.46
0.25
0.02
0.00
4.78
5.32
5.11
25.2
18.3
11.0
11.8
10.1
7.1
7.2
6.6
14.2
11.7
14.7
12.5
8.2
5.9
5.6
5.2
100.0
88.0
54.8
62.1
22.5
37.2
14.4
17.0
20.8
16.1
12.6
12.6
9.1
6.0
6.4
5.9
14.4
9.3
10.2
8.5
6.6
7.6
7.5
7.1
32.6
26.7
34.9
28.6
25.7
14.8
13.9
11.6
21.5
16.9
18.6
16.0
52.3
70.2
87.9
79.2
100.0
39.9
45.4
44.2
100.0 100.0
100.0
100.0
12.5
7.9
8.1
7.2
6.3
4.4
4.1
3.8
30.4
32.4
30.6
24.2
10.5
7.0
6.5
5.5
91.7
32.9
27.8
27.7
13.2
10.3
9.7
9.1
40.1
31.2
39.9
29.4
86.1
71.8
83.1
80.6
#DIV/0! 51.9
63.4
53.7
26.9
25.6
21.0
18.8
10.6
6.6
5.6
5.1
49.2
53.9
51.4
41.5
24.9
18.6
15.5
15.2
37.9
23.1
25.8
21.7
62.0
65.5
39.1
48.2
25.8
22.9
22.7
18.8
#DIV/0! 100.0
66.0
60.3
#DIV/0! #DIV/0! #DIV/0! #DIV/0!
<10
10-20
20-30
>30
Forest type
Pinyon-juniper woodland
Douglas-fir
Ponderosa pine
Lodgepole pine
Nonstocked
Juniper woodland
Subalpine fir
Engelmann spruce
Aspen
Deciduous oak woodland
Engelmann spruce-subalpine fir
Grand fir
Evergreen oak woodland
Rocky Mountain juniper
Western larch
Mesquite woodland
Whitebark pine
Western redcedar
White fir
Limber pine
Mountain hemlock
Western hemlock
Intermountain maple woodland
Cercocarpus woodland
Cottonwood
Western juniper
Blue spruce
Paper birch
Misc. western softwoods
Foxtail-bristlecone pine
Western white pine
Cottonwood-willow
Southwest white pine
Misc. western hardwoods woodland
number of n=# of
pieces
plots
3,522
10,067
2,844
10,560
2,406
336
6,275
5,193
4,875
557
3,601
1,728
335
167
1,311
4
526
959
559
210
200
426
55
23
116
29
283
41
22
37
23
21
18
0
1,060
853
520
482
481
390
318
300
267
247
153
109
95
75
61
46
45
44
32
27
19
18
16
16
15
14
13
5
4
2
2
2
2
1
57,329
5,734
3-48'
3-72'
3-120'
48'
144' 216'
360'
1-48'
(144')
(216')
(360') % std. % std. % std. % std.
tons/ac tons/ac tons/ac tons/ac err.
err.
err.
err.
1.27
4.61
2.30
7.87
2.54
0.18
10.10
8.05
4.95
1.09
11.99
8.51
1.79
0.56
10.52
0.00
4.97
20.69
5.14
4.79
8.13
10.13
0.61
0.46
3.84
1.43
6.13
0.93
0.00
4.14
1.36
4.25
11.98
0.00
1.40
4.62
2.51
8.33
2.35
0.20
10.39
8.97
4.63
1.01
11.24
8.58
1.84
0.74
10.42
0.01
5.20
15.65
6.11
2.19
9.14
10.16
1.08
0.43
2.66
1.32
9.34
1.95
1.22
2.74
4.11
6.47
5.57
0.00
1.28
4.68
2.98
7.81
2.52
0.28
10.50
9.52
4.80
1.05
11.63
9.59
1.81
1.04
11.81
0.03
6.50
14.19
7.30
5.02
6.31
8.95
2.70
0.48
1.67
0.86
10.40
3.33
2.57
6.60
5.16
4.48
13.16
0.00
1.33
4.66
2.79
8.02
2.45
0.25
10.46
9.30
4.73
1.03
11.48
9.19
1.82
0.92
11.25
0.02
5.98
14.77
6.82
3.89
7.44
9.43
2.06
0.46
2.07
1.05
9.97
2.78
2.03
5.05
4.74
5.28
10.12
0.00
4.78
5.32
5.11
10.6
6.3
10.5
6.6
13.2
25.8
8.2
9.1
12.5
24.9
10.1
14.4
26.9
37.9
14.2
#DIV/0!
21.5
25.2
25.7
30.4
32.6
20.8
86.1
62.0
40.1
49.2
22.5
91.7
#DIV/0!
100.0
100.0
52.3
100.0
6.6
4.4
7.0
7.6
10.3
22.9
5.9
6.0
7.9
18.6
7.1
9.3
25.6
23.1
11.7
100.0
16.9
18.3
14.8
32.4
26.7
16.1
71.8
65.5
31.2
53.9
37.2
32.9
51.9
39.9
100.0
70.2
88.0
5.6
4.1
6.5
7.5
9.7
22.7
5.6
6.4
8.1
15.5
7.2
10.2
21.0
25.8
14.7
66.0
18.6
11.0
13.9
30.6
34.9
12.6
83.1
39.1
39.9
51.4
14.4
27.8
63.4
45.4
100.0
87.9
54.8
5.1
3.8
5.5
7.1
9.1
18.8
5.2
5.9
7.2
15.2
6.6
8.5
18.8
21.7
12.5
60.3
16.0
11.8
11.6
24.2
28.6
12.6
80.6
48.2
29.4
41.5
17.0
27.7
53.7
44.2
100.0
79.2
62.1
#DIV/0! #DIV/0! #DIV/0! #DIV/0!
<10
10-20
20-30
>30
Forest type
Lodgepole pine
Douglas-fir
Subalpine fir
Engelmann spruce
Aspen
Engelmann spruce-subalpine fir
Pinyon-juniper woodland
Ponderosa pine
Nonstocked
Grand fir
Western larch
Western redcedar
White fir
Deciduous oak woodland
Whitebark pine
Western hemlock
Juniper woodland
Evergreen oak woodland
Blue spruce
Limber pine
Mountain hemlock
Rocky Mountain juniper
Cottonwood
Intermountain maple woodland
Paper birch
Foxtail-bristlecone pine
Western juniper
Cercocarpus woodland
Western white pine
Misc. western softwoods
Cottonwood-willow
Southwest white pine
Mesquite woodland
Misc. western hardwoods woodland
number of n=# of
pieces
plots
10,560
10,067
6,275
5,193
4,875
3,601
3,522
2,844
2,406
1,728
1,311
959
559
557
526
426
336
335
283
210
200
167
116
55
41
37
29
23
23
22
21
18
4
0
482
853
318
300
267
153
1,060
520
481
109
61
44
32
247
45
18
390
95
13
27
19
75
15
16
5
2
14
16
2
4
2
2
46
1
57,329
5,734
3-48'
3-72'
3-120'
48'
144' 216'
360'
1-48'
(144')
(216')
(360') % std. % std. % std. % std.
tons/ac tons/ac tons/ac tons/ac err.
err.
err.
err.
7.87
4.61
10.10
8.05
4.95
11.99
1.27
2.30
2.54
8.51
10.52
20.69
5.14
1.09
4.97
10.13
0.18
1.79
6.13
4.79
8.13
0.56
3.84
0.61
0.93
4.14
1.43
0.46
1.36
0.00
4.25
11.98
0.00
0.00
8.33
4.62
10.39
8.97
4.63
11.24
1.40
2.51
2.35
8.58
10.42
15.65
6.11
1.01
5.20
10.16
0.20
1.84
9.34
2.19
9.14
0.74
2.66
1.08
1.95
2.74
1.32
0.43
4.11
1.22
6.47
5.57
0.01
0.00
7.81
4.68
10.50
9.52
4.80
11.63
1.28
2.98
2.52
9.59
11.81
14.19
7.30
1.05
6.50
8.95
0.28
1.81
10.40
5.02
6.31
1.04
1.67
2.70
3.33
6.60
0.86
0.48
5.16
2.57
4.48
13.16
0.03
0.00
8.02
4.66
10.46
9.30
4.73
11.48
1.33
2.79
2.45
9.19
11.25
14.77
6.82
1.03
5.98
9.43
0.25
1.82
9.97
3.89
7.44
0.92
2.07
2.06
2.78
5.05
1.05
0.46
4.74
2.03
5.28
10.12
0.02
0.00
4.78
5.32
5.11
6.6
7.6
7.5
7.1
6.3
4.4
4.1
3.8
8.2
5.9
5.6
5.2
9.1
6.0
6.4
5.9
12.5
7.9
8.1
7.2
10.1
7.1
7.2
6.6
10.6
6.6
5.6
5.1
10.5
7.0
6.5
5.5
13.2
10.3
9.7
9.1
14.4
9.3
10.2
8.5
14.2
11.7
14.7
12.5
25.2
18.3
11.0
11.8
25.7
14.8
13.9
11.6
24.9
18.6
15.5
15.2
21.5
16.9
18.6
16.0
20.8
16.1
12.6
12.6
25.8
22.9
22.7
18.8
26.9
25.6
21.0
18.8
22.5
37.2
14.4
17.0
30.4
32.4
30.6
24.2
32.6
26.7
34.9
28.6
37.9
23.1
25.8
21.7
40.1
31.2
39.9
29.4
86.1
71.8
83.1
80.6
91.7
32.9
27.8
27.7
100.0
39.9
45.4
44.2
49.2
53.9
51.4
41.5
62.0
65.5
39.1
48.2
100.0 100.0
100.0
100.0
#DIV/0! 51.9
63.4
53.7
52.3
70.2
87.9
79.2
100.0
88.0
54.8
62.1
#DIV/0! 100.0
66.0
60.3
#DIV/0! #DIV/0! #DIV/0! #DIV/0!
<10
10-20
20-30
>30
Forest type and number of pieces
Southwest white pine
18
Cottonwood-willow
21
Western white pine
23
Foxtail-bristlecone pine
37
Mountain hemlock
200
Blue spruce
283
Western hemlock
426
Whitebark pine
526
White fir
559
Western redcedar
959
Western larch
1,311
Grand fir
1,728
60
Engelmann spruce-subalpine fir
3,601
70
Aspen
4,875
80
Engelmann spruce
5,193
Subalpine fir
6,275
Douglas-fir
10,067
Lodgepole pine
10,560
Percent standard error of high biomass types
Data Analysis
100
90
48' transect
144' transect
216' transect
360' transect
50
40
30
20
10
0
Forest type and number of pieces
Misc. western hardwoods woodland
0
Mesquite woodland
4
Misc. western softwoods
22
Cercocarpus woodland
23
Western juniper
29
Paper birch
41
Intermountain maple woodland
55
Cottonwood
116
Rocky Mountain juniper
167
Limber pine
210
Evergreen oak woodland
335
60
Juniper woodland
336
70
Deciduous oak woodland
557
80
Nonstocked
2,406
Ponderosa pine
2,844
Pinyon-juniper woodland
3,522
Percent standard error of low biomass types
Data Analysis
100
90
48' transect
144' transect
216' transect
360' transect
50
40
30
20
10
0
Data Analysis Conclusion
1.
2.
3.
4.
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.
Greater than 360’ transect would require too much field time
(already over 1 hr. ave. per plot).
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.
Therefore, a good compromise for P2 CWD transect length is
between 48’ – 360’.
FIA P2 DWM Update
1. P2 DWM-general background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
IWFIA 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 variables
Transect
Length
Population
estimates (not
finished)
CWD variables
FWD variables
Duff variables
Litter variables
F
i
r
e
CWD_TL
FWD_SM_TL
FWD_MD_TL
FWD_LG_TL
COND_PROP_CWD
COND_PROP_FWD_SM
COND_PROP_FWD_MD
COND_PROP_FWD_LG
COND_PROP_DUFF
COND_PROP_LITTER
CWD_LINEALFT_AC
CWD_CF_AC
CWD_DRYBIOT_AC
CWD_CARBON_AC
FWD_SM_CNT
FWD_SM_CF_AC
FWD_SM_DRYBIOT_AC
FWD_SM_CARBON_AC
FWD_MD_CNT
FWD_MD_CF_AC
FWD_MD_DRYBIOT_AC
FWD_MD_CARBON_AC
FWD_LG_CNT
FWD_LG_CF_AC
FWD_LG_DRYBIOT_AC
FWD_LG_CARBON_AC
DUFF_DEPTH
DUFF_BIOMASS_AC
DUFF_CARBON_AC
LITTER_BIOMASS_AC
LITTER_CARBON_AC
LITTER_DEPTH
F
L
M
DWM component by state and type (7,560 plots)
Duff
10
CWD
Litter
8
FWD large
FWD medium
6
FWD small
4
2
Timber types
Nonstocked
State and Timber/Woodland type
Woodland types
Arizona
Utah
Colorado
Idaho
Montana
Arizona
Utah
Colorado
Idaho
Montana
Arizona
Utah
Colorado
Idaho
0
Montana
Average tons/acre by DWM component
12
Cottonwood
Paper birch
Limber pine
Misc. western softwoods
Timber forest types (4,528 plots /conditions)
Ponderosa pine
Aspen
Douglas-fir
Whitebark pine
35
White fir
45
Mountain hemlock
Blue spruce
Lodgepole pine
Engelmann spruce
Grand fir
Subalpine fir
Engelmann sprucesubalpine fir
Western larch
Western hemlock
Western redcedar
Average biomass tons/acre
Timber forest type (all states)
CWD biomass
40
DWM biomass
30
25
20
15
10
5
0
Woodland forest types (2,559 plot/conditions)
Mesquite woodland
Juniper woodland
Western juniper
Rocky Mountain juniper
Deciduous oak woodland
Cercocarpus woodland
Pinyon-juniper woodland
Evergreen oak woodland
Intermountain maple woodland
Average biomass tons/acre
Woodland forest type (all states)
25
CWD biomass
20
DWM biomass
15
10
5
0
Stand age by types (all states)
30
Timber types - CWD biomass
Timber types - DWM biomass
25
Average biomass tons/acre
Woodland types - CWD biomass
Woodland types - DWM biomass
20
15
10
5
0
1-49
50-99
100-149
150-199
200-249
Stand age 50-year class
250-299
300-349
350+
CWD large-end diameter class--20”+
35
Percent CWD pieces
30
25
20
15
10
5
0
Montana/Idaho timber types
Total forest biomass by component (Montana timber types)
70
Average biomass tons/acre
60
50
40
Live tree
Standing dead tree
CWD
30
Duff
Litter
FWD
20
10
0
1-49
50-99
100-149
150-199
200-249
Stand age 50-year class
250-299
300+
Effect groups from LANDFIRE Fuel Loading Models (FLM)
LANDFIRE (Lutes and others 2009)
Effect groups from 7,560 IWFIA plots run through LANDFIRE First Order
Fire Effects Model (FOFEM) program (Duncan Lutes 2010)
FLM 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.
62
81
101
92
Nonstocked
Fuel Loading Model (FLM)
93
102
Woodland types
91
51
Timber types
63
82
61
13
41
12
83
71
64
72
21
31
11
0
200
400
600
800
1,000
Number of plot/conditions (7,560 plots)
1,200
1,400
1,600
FIA P2 DWM Update
1. P2 DWM-background
2. IWFIA P2 DWM-data analysis
3. IWFIA P2 DWM-examples of data
uses
4. Future P2 DWM-national vs.
regional
National DWM Transect Design
4 - 48’ transects (192’ total)
360
°
Subplot
2
Macroplot
CWM
transects
180
°
Litter and
duff depth
FWM
transects
270
°
45°
4
225
°
Extra
transect on
subplot option
1
90°
Longer transect
length on
macroplot option
315
°
3
135
°
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 variables
OPTION I: BASE (P2)
OPTION II: WILDLIFE /
ECOLOGICAL (P3)
BASE Layout Variables: Protocol Option, #
BASE Layout Variables
Subplots, # Transects per Subplot, Transect Length
Transect Line Segmenting: Subplot Num,
Transect, Condition Class Number, Beginning
Distance (HD), Ending Distance (HD), DWM
Transect Sample Status, DWM Transect NonSample Reason
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 Transect Line Segmenting
Variables
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 CWM Variables +:
Large End Diameter, Length, Hollow,
Small End Diameter
ADDITIONAL OPTIONAL
VARIABLES
Condition Level Variable: Condition
Fuel Type Model #
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 FWM Variables: Subplot Number, Transect, BASE FWM Variables
Condition Class, FWM Transect Sample Status,
FWM Transect Non-Sampled Reason, Small FWM
Count, Medium FWM Count, Large FWM Count,
High Count Reason
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?
Larry T. DeBlander
User Group Webinar
April 13, 2010
Ogden, UT
Phone: 801-625-5204
Email: [email protected]
Nonstocked field forest type (759 plot/conditions)
Mesquite woodland
Rocky Mountain juniper
Cercocarpus woodland
Juniper woodland
Western juniper
Pinyon-juniper woodland
Grand fir
Evergreen oak woodland
30
Limber pine
40
Ponderosa pine
Aspen
Deciduous oak woodland
Cottonwood
Whitebark pine
Douglas-fir
Engelmann spruce
Subalpine fir
Lodgepole pine
Engelmann spruce-subalpine fir
Western larch
Average biomass tons/acre
Nonstocked types (all states)
CWD biomass
35
DWM biomass
25
20
15
10
5
0
IWFIA P2 CWD Transect Design
• Three - 48 ft
transects on
subplots
• Three – 72 ft
transects
between
subplots
Primary objectives for a national
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.