Introduction to the fia down woody materials indicator 1st of 3 part training series
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Introduction to the FIA Down Woody Materials Indicator 1st of 3 Part Training Series. Christopher Woodall DWM National Indicator Advisor. Outline. Indicator Updates What are Down Woody Materials? Why Collect DWM data? Sampling Design Theory. Indicator Updates. No sample protocol changes

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Introduction to the fia down woody materials indicator 1st of 3 part training series

Introduction to the FIA Down Woody Materials Indicator1st of 3 Part Training Series

Christopher Woodall

DWM National Indicator Advisor


Outline
Outline

  • Indicator Updates

  • What are Down Woody Materials?

  • Why Collect DWM data?

  • Sampling Design Theory


Indicator updates
Indicator Updates

  • No sample protocol changes

  • Field manual updated in 2004

  • Web-site updated

  • DWM sample design and analysis in press – NC-GTR-256

  • Web-based dissemination of data and wider use of data


Definition of dwm
Definition of DWM

Dead material within forests in various stages of decay such as fallen trees, branches, and leaf litter

The FIA program places numerous forest ecosystem components into the DWM Indicator


Dwm components
DWM Components

Coarse Woody Debris

Duff

Fine

Woody

Debris

Shrubs/

Herbs

Slash

Litter




Duff and litter
Duff and Litter

“dead plant material on forest floor surface”

“unrecognizable plant parts”


Slash residue piles
Slash/Residue Piles

Piles of CWD


Shrub and herbs
Shrub and Herbs

“Live and dead shrubs/herbs including grass, herbaceous woody plants, and vines”


Fuelbed
Fuelbed

“Depth of the fuel’s complex, from forest floor to the tallest fuel component”


Why collect dwm data
Why collect DWM data?

  • Indicator of Forest Health

  • Wildlife Habitat

  • Fuels Estimation

  • Carbon Estimation

  • Completes Life Cycle of Trees


Indicator of forest health
Indicator of Forest Health

Crown Condition

Soils

Ozone Injury

Down Woody Materials

Lichens

Vegetation Structure and Diversity

Tree Damage


Wildlife
Wildlife

The DWM Inventory describes the amount and condition of wildlife habitat through estimation of coarse woody debris attributes.


Wildlife1
Wildlife

Mean estimates of CWD volumes for forests of the North Central Region


Wildlife2
Wildlife

Proportions of coarse woody debris pieces per acre by transect diameter (A) and decay class (B) (1=least decayed, 5=most decayed), Indiana, 2001-2003


Fuels
Fuels

1-hr

10-hr

100-hr

Total Fine Woody Debris


Fire science
Fire Science

Estimates for DWM in Boundary Waters Canoe Area Compared to rest of region


Carbon estimation
Carbon Estimation

Estimates of Regional Carbon Pools for Coarse Woody Debris

Estimates for International Treaties and Criterion Indicators


Dwm and national inventory
DWM and National Inventory

Completes inventory of trees from living, to dead, to decomposed

Microplot Sapling

Sub-plot Tree

Sub-plot Standing Dead

DWM Down and Dead



Dwm sampling theory
DWM Sampling Theory

DWM diversity requires a diversity of sampling methods


Sampling on the sub plot
Sampling on the Sub-Plot

Slash Piles

2

Similar to sampling phase two trees, if a center of a slash pile coincides with a subplot it is considered an “in” slash pile

Microplot

N

Subplot

1

4

3


Sampling on the sub plot1
Sampling on the Sub-Plot

“out” slash pile

“in” slash pile

Slash piles are sampled across all four subplots

FIA Subplot


Sampling on the microplot
Sampling on the Microplot

In order to estimate shrub/herb heights and coverage for forests (fuel ladders)

estimate shrub/herb heights and coverage occurring on micro-plot

6.8 ft

Radius


Depth estimates on subplot
Depth Estimates on Subplot

Litter

In order to estimate depth of duff, litter, and the fuelbed on a subplot…

Duff

12 sample points located for measurement on subplots

Fuelbed


Depth estimates on subplots
Depth Estimates on Subplots

2

Sample Locations

1

4

3


Transect sampling
Transect Sampling

FWD and CWD pieces are not all counted within a given area

rather…

All FWD and CWD pieces that intersect a sampling plane are tallied


Transect sampling1
Transect Sampling

Probability of match stick intersecting randomly placed line related to number of sticks and length of line


Transect sampling planes
Transect Sampling Planes

DWM Sample Protocol establishes 6 foot tall sampling transects that radiate from FIA subplot centers to intersect fine woody pieces


Cwd and fwd transects
CWD and FWD Transects

Use 3 transects established on each subplot to sample CWD, one transect on each subplot to sample FWD



Conclusions
Conclusions

  • The DWM indicator estimates numerous ecosystem components

  • Data Crucial to Fire, Carbon, and Wildlife Sciences

  • Integral Part of National FIA Program, Completes Tree Life Cycle

  • Series of different sampling techniques for estimation of various DWM components applied to phase two plots


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