Data Source Listing
EP703 Forest Productivity Plots
Location: Vancouver Forest Region, British Columbia
Description: EP703 is BC's largest experiment looking at thinning and fertilization in
coastal Douglas-fir and western hemlock stands. In 1971-73 940 permanent sample plots
(0.04-0.10 ha in size) were established at 85 locations. Several thinning and
fertilization treatments were conducted at each site with each treatment replicated on a
site (though treatments vary between sites). Regular measurements have been conducted on
the plots. In the orginal measurements only the dead trees condition at the first
measurement after death was noted. Starting in 1994, dead trees are followed through time
for presence and ocularly estimated height if bole breakage occurred.
Major Tree Species:
- Pseudotsuga menziesii Douglas-fir
- Tsuga heterophylla western hemlock
Minor Tree Species:
- Thuja plicata western redcedar
Data Type: Permanent sample plot
Typical Measurement Dates: 1972 1975 1978 1981 1984 1990 1996
Future Measurements: Yes on most plots
Dead Tree Data Collected: standing/down, height to breakage
Measurements Prior to Death: dbh, pathological indicators, some heights
Data Availability: Limited
Publications:
- Darling, L.M. and S.A.Y. Omule. 1989. Extensive studies of fertilizing and thinning
Coastal Douglas-fir and western hemlock: an establishment report. B.C. Min. For., FRDA
Report 54. Victoria B.C.
- Stone, J.N. 1994. Extensive studies of fertilizing and thinning Coastal Douglas-fir and
western hemlock: an installation report. B.C. Min. For., FRDA Report 227. Victoria B.C.
- Stone, J.N. 1996. Modelling the dynamics of dead trees in TASS and WinTIPSY. FRDA
Research Memo 227. Victoria. B.C.
Contact
Dr. Louise de Montigny
Silviculturalist, Coastal Field Experiments
Research Branch
Ministry of Forests
P.O. Box 9519 Stn. Prov. Gov.
Victoria, British Columbia
Canada V8W 9C2
Phone: 1 250 387 3295
Fax: 1 250 387 8197
Email: louise.demontigny@gems.gov.bc.ca
Summary of Coarse Woody Debris Inventories in British Columbia 1997
Location: British Columbia
Description: In 1996/97, John Parminter, Eric Lofroth and Andy MacKinnon gathered data
from a number of (mostly unpublished) B.C. research studies that measured coarse woody
debris in various ways. These data were organized and analysed by Qiwei Liang, on contract
with B.C. Ministry of Forests Research Branch. Coarse woody debris volumes/hectare
(volumes.xls) and piece numbers/hectare (piece.xls) are reported for B.C. by Natural
Disturbance Type (as described in the Forest Practice Code's Biodiversity Guidebook),
biogeoclimatic zone, and broad moisture regime ('dry', 'mesic', and 'wet'), by size class
and decay class. A summary of these results is presented in the back of Tory Stevens'
report "The Ecological Role of Coarse Woody Debris" (Working Paper 30, 1997) as
Appendix 2, p. 25.
Three files are available:
KIWI.DOC contains the report on this project prepared by Qiwei Liang.
VOLUMES.XLS contains volumes/hectare by decay class and size class. Columns are as
follows: A - record; B - Natural Disturbance Type; C - biogeoclimatic zone; D -
biogeoclimatic subzone/variant; E - moisture regime ('dry', 'mesic', and 'wet'); F -
collector (see key below); G - site # (specific to research project); H - plot # (specific
to research project); I - total cwd volume (m3/hectare); J-N - volume (m3/hectare) by
diameter class (see notes below); O-S - volume (m3/hectare) by decay class (see notes
below); T - volume (m3/hectare) for decay classes 1+2; U - volume (m3/hectare) for decay
classes 3+4+5.
PIECE.XLS contains number of pieces/hectare by decay class and size class. Columns are
as follows: A - record; B - Natural Disturbance Type; C - biogeoclimatic zone; D -
biogeoclimatic subzone/variant; E - moisture regime ('dry', 'mesic', and 'wet'); F -
collector (see key below); G - site # (specific to research project); H - plot # (specific
to research project); I - total piece # (pieces/hectare); J-N - piece # (pieces/hectare)
by diameter class (see notes below); O-S - piece # (pieces/hectare) by decay class (see
notes below); T - piece # (pieces/hectare) for decay classes 1+2; U - piece #
(pieces/hectare) for decay classes 3+4+5.
'Collectors' are the last names of the researchers who collected the data and kindly
allowed its use in this analysis: André Arsenault, Jenny Balke, Barry Booth, Tyler Elm,
Laura Darling, Rick Dawson, Trevor Kinley, Eric Lofroth, Andy MacKinnon, Doug Steventon,
and Richard Weir.
Diameter classes are based on log diameter at point of transect: size 1 (<20 cm),
size 2 (20-40 cm), size 3 (40-60 cm), size 4 (60-80 cm), and size 5 (>80 cm).
Decay classes 1-5 (D1-D5) are the standard coarse woody debris decay classes, and decay
classes 6-7 (D6-D7) are used where the collector recorded only two classes -
"hard" (=decay classes 1+2) and "soft" (=decay classes 3-5).
Our sincere thanks are extended to the researchers who contributed their datasets to
this project.
Major Tree Species: varied
Data Type: Primarily line intersect estimates
Typical Measurement Dates: late 1980 to present
Future Measurements: No
Dead Tree Data Collected: down, diameter
Data Availability: Freely
Related Publications:
- Stevens, Victoria. 1997. The Ecological Role of Coarse Woody Debris. Working Paper No.
30, Ministry of Forests, Research Branch p. 25.
Contact
John Parminter
Research Branch
Ministry of Forests
P.O. Box 9519 Stn. Prov. Gov.
Victoria, British Columbia
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