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a Establishment of “G” Permanent Sample Plots 2008 a

a Establishment of “G” Permanent Sample Plots 2008 a. Tie Point Plaques. CENTRE FOR GROWTH Sample No.____ Plot No.____ TIE POINT FOR GROWTH Sample No._ 12 _ Plot No . _ 1 _ Bearing _____ 42 (azimuth) _ Distance ___ 82 m__ ___ R. No. _ 46 _ Comp. No. _ 25 _

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a Establishment of “G” Permanent Sample Plots 2008 a

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  1. a Establishment of “G” Permanent Sample Plots 2008 a

  2. Tie Point Plaques CENTRE FOR GROWTH Sample No.____ Plot No.____ TIE POINT FOR GROWTH Sample No._12_ Plot No. _1_ Bearing _____ 42 (azimuth)_ Distance ___82 m_____ R. No. _46_ Comp. No. _25_ Date ___Sept. 10, 2002____NATURAL ! MANAGED ! INST. NO.___ B.C.F.S. FOREST INVENTORY BRANCH CENTRE FOR GROWTH SA. TYPE ___ INST. NO.___ SAMPLE NO. __ PLOT NO.__ -------------------------------------------- TIE POINT FOR GROWTH SA. TYPE _G_ INST. NO.____ SAMPLE NO.12_PLOT NO. _1_ BEARING ______ 42(azimuth)_____ DISTANCE ____82 m____ ------------------------------------------- REG. NO. __46_COMP. NO. _25_ DATE ____Sept 10, 2002____ B.C.F.S. FOREST INVENTORY BRANCH

  3. Minimum Distances stand height PC Lake 50 meters to disturbance or road Harvested TP

  4. Tie Lines • Reconnaissance approximate horizontal distance and bearing. • Plot centre may be offset to avoid unsuitable areas • Plot centre marked with tubular aluminium stake Lake • Access Notes should describe tie tree and tie line • Select distinctive tie point • The tie line must be painted and flagged withannotated flagging TP

  5. Plot Centre Plaque CENTRE FOR GROWTH Sample No._12_ Plot No._1_ TIE POINT FOR GROWTH Sample No.____ Plot No. ___ Bearing _________________ Distance _________________ R. No. __46_ Comp. No. _25_ Date ___Sept 10, 2002_____NATURAL ! MANAGED ! INST. NO.___ B.C.F.S. FOREST INVENTORY BRANCH CENTRE FOR GROWTH SA. TYPE __G_ INST. NO.___ SAMPLE NO. _12_ PLOT NO._1_ -------------------------------------------- TIE POINT FOR GROWTH SA. TYPE ___ INST. NO.____ SAMPLE NO.___PLOT NO. ___ BEARING _________________ DISTANCE ________________ ------------------------------------------- REG. NO. __46_COMP. NO. _25_ DATE ____Sept 10, 2002____ B.C.F.S. FOREST INVENTORY BRANCH

  6. Plot Centre & Tie to Next Sample CENTRE FOR GROWTH Sample No._12_ Plot No._1_ TIE POINT FOR GROWTH Sample No._13_ Plot No. 1__ Bearing ____42 (azimuth)_ Distance _____82 m____________ R. No. __46_ Comp. No. _25_ Date ___Sept 10, 2002_____NATURAL ! MANAGED ! INST. NO.___ B.C.F.S. FOREST INVENTORY BRANCH CENTRE FOR GROWTH SA. TYPE __G_ INST. NO.___ SAMPLE NO. _12_ PLOT NO._1_ -------------------------------------------- TIE POINT FOR GROWTH SA. TYPE _G_ INST. NO.____ SAMPLE NO._13PLOT NO. _1_ BEARING ____42_(azimuth)________ DISTANCE ____82 m________ ------------------------------------------- REG. NO. __46_COMP. NO. _25_ DATE ____Sept 10, 2002____ B.C.F.S. FOREST INVENTORY BRANCH

  7. Plot Size • The objective of the sampling design is to obtain a sample of approximately 90 living commercial and non-commercial trees with a diameter at breast height (dbh) of 4.0 cm or greater. • A subplot centred in the main plot is used to sample approximately 20 commercial trees less than the tagging limit.

  8. Centre & Tag/Site Sectors N 8 1 Cs 2 7 3 6 Idealized where plot area is 0.08ha hence 8 tagging and 8 site sectors. 4 5

  9. Sample Setup • Centre stake flagged and cairn of rocks for protection • Triangulate (bearing and horizontal distance from plot centre) centre stake to 3 tagged healthy plot reference trees near plot centre • Confirm slope corrected plot perimeter • String perimeter and sectors • Ensure nails on plaques and tree tags will allow for growth • Record plot attributes (crown closure, slope, aspect, elevation, slope position, damage to reflect tree damage)

  10. Plot Tagging N Tagging pattern flows to next sector which aids the measurement flow Tags face inward on odd sectors and outward on even sectors 8 1 2 7 3 6 Note “near” tree for out of sequence numbers 4 5

  11. Forks and Non-forks Below dbh Cross Section showing pith at germination point

  12. Tagging Forked Trees B C A A = 2.4 cm If ‘B” in subplot D.B.H. B = 24.8 cm Yes C = 6.5 cm Yes

  13. Cross Section of Half WrapDBH for Trees Growing Together second nail second nail Measure between nails and double for diameter as cannot measure around tree This allows consistent remeasurement nail and tag nail and tag

  14. Tree Measurements • The data must be captured digitally in the field with an Electronic Field Recorder (EFR) using GyHost/GyHand software • Species (commercial and non-commercial) • DBH (for plot trees) >4.0 cm at 1.3 meters (Uphill side) • Tree Class (pathological indicators and their position) • Crown class (position in the crown relative to other trees)

  15. Tree Measurements • Live crown length (contiguous live crown) 10% to 100% in 10% increments • Sectors (tagging, site and centre) • Stumps ‘O’ or ‘N’ • Damage Agents and Severity (tree and sample) • Suitable for height?

  16. Dead Trees • Standing trees >10.0 cm dbh and >1.3m in height Tag, measure DBH and classify dead tree attributes Tree number and tree number certainty • Species & species certainty • Vertical position (standing or down) • If standing: broken top and height to break • If down: supported or on the ground • Wildlife tree appearance (1 - 7) Appendix 22

  17. What is a Dead Tree? • Any tree with one or more green needles is considered alive • Bark may or may not appear to be alive Note: Use tree comments for questionable trees!

  18. The Subplot • A circular plot centred on plot stake from 0.002 ha (2.52 m radius) to maximum of the full plot area • Target is 20 commercial trees 0.3 m in height to 3.9 cm in DBH • For trees 2.0 cm to 3.9 cm in DBH • Tag and classify as in plot • For trees under 2.0 cm in DBH do a dot count by species and “class” 0.3 to 1.3 m in height [D Class = 0] 0.1 to 1.9 cm in DBH [D Class = 1]

  19. The Subplot Layout Minimum 20 commercial stems 0.3 m in ht. to 3.9 cm DBH Subplot cannot be changed once established. Minimum size is 0.002 ha (2.52 m radius) to maximum of full plot area N 8 1 2 7 . 3 6 4 5

  20. Less than 2.0 cm dbh For the purpose of dot count trees, each rooting system defines a tree

  21. Less than 2.0cm dbh For small sub-plot trees <2.0 cm measure the length of the tree to decide its dbh class

  22. Dot Count Anomalies Sprouting at the base of Birch ? 1 Dot Count 0 ( < 1.3 m) = 5 1 ( > 1.3 m) = 1 1.3 m 0 0 0 0 0 0.3 m

  23. Height Sample Trees • For first two majors • Top height tree(software selected in centre sector “C”) • Site trees(software selected in site sectors) • 4 - 10 (proportionate to plot size / 0.01 ha) • Must be “suitable” • no substitution! • Fifteen others (down to 2.0cm dbh) • Other majors, minor and scattered • Up to fifteen if suitable and available • Mark direction for height with painted dot

  24. Top Height Tree • Largest dbh tree in a 0.01ha plot (Centre sector “C”) Measurement specific • Suitability • Crown class 1 or 2 (not suppressed or residual) • No major defects (healthy) • Within 5% of original height (no major top damage) • No substitution!

  25. Site Trees • Largest dbh tree per 0.01ha plot (software will select from site sectors) • Collect for the first two leading major species Measurement specific • Suitability • Crown class 1 or 2 (not suppressed or residual) • No major defects (healthy) • Within 5% of original height (no major top damage) • No substitution!

  26. Leaning Trees b = c x cos A cos A 2 0.999390 4 0.997564 6 0.994521 8 0.990268 10 0.984807 11 0.981627 12 0.978148 14 0.970296 16 0.961262 18 0.951057 A c c b A B C a c\A 2 4 6 8 10 11 12 14 16 18 ****** <2 % ****** **2>% - <5% ** 5.0m 5.0 5.0 5.0 5.0 4.9 4.9 4.9 4.9 4.8 4.8 10.0m 10.0 10.0 9.9 9.9 9.8 9.8 9.8 9.7 9.6 9.5 15.0m 15.0 15.0 14.9 14.8 14.8 14.7 14.7 14.6 14.4 14.3 20.0m 20.0 20.0 19.9 19.8 19.7 19.6 19.6 19.4 19.2 19.0 25.0m 25.0 24.9 24.9 24.8 24.6 24.5 24.5 24.3 24.0 23.8 30.0m 30.0 29.9 29.8 29.7 29.5 29.4 29.3 29.1 28.8 28.5 35.0m 35.0 34.9 34.8 34.7 34.5 34.4 34.2 34.0 33.6 33.3 40.0m 40.0 39.9 39.8 39.6 39.4 39.3 39.1 38.8 38.4 38.0 45.0m 45.0 44.9 44.8 44.6 44.3 44.2 44.0 43.7 43.3 42.8 50.0m50.0 49.9 49.7 49.5 49.2 49.1 48.9 48.5 48.1 47.6

  27. Heights on Leaning Trees

  28. Heights – Optimum Distances Height = 27.0 meters Allowable error ( + 2%) = >26.5 - < 27.5 meters True height 1x 2x 3x • Within the allowable error Within 3% Over twice the allowable error 1 x ht 1.1 x ht 1.15 x ht 1.2 x ht 1.3 x ht 1.4 x ht 1.45 x ht 1.5 x ht 2 x ht 3 x ht 27x 96=25.9 27x 97=26.229x90=26.1 31x84=26.0 33x79=26.1 35x74=25.9 37x70=25.9 27x 98=26.529x91=26.4 31x85=26.4 33x80=26.4 35x75=26.3 37x71=26.339x67=26.1 40x65=26.0 54x48=25.9 81x32=25.9 27x 99=26.7 29x92=26.7 31x86=26.7 33x81=26.7 35x76=26.6 37x72=26.6 39x68=26.540x66=26.454x49=26.5 81x33=26.7 27x100=27.0 29x93=27.0 31x87=27.033x82=27.135x77=27.0 37x73=27.039x69=26.940x67=26.8 54x50=27.0 81x34=27.5 27x101=27.3 29x94=27.3 31x88=27.3 33x83=27.4 35x78=27.3 37x74=27.4 39x70=27.3 40x68=27.2 54x51=27.581x35=28.4 27x102=27.529x95=27.6 31x89=27.6 33x84=27.7 35x79=27.7 37x75=27.839x71=27.7 40x69=27.654x52=28.1 27x103=27.8 29x96=27.831x90=27.9 33x85=28.1 35x80=28.0 37x76=28.1 39x72=28.1 40x70=28.0 27x104=28.1 29x97=28.2

  29. Age Sample Trees • ‘Top height tree’ from centre plot • Site Trees • In complex stands - two more from younger trees • Confirm veteran age • Save cores in labelled straw (sample + tree number) • Want 2 cores per species to have pith • Measure 5, 10, 20 radial increment • Assess for suppression • Estimate age for rotten cores • Count/confirm ages in office with magnification

  30. Standards for Live Trees • Species (genus) [2] no error • Missed Plot Trees [2] no error within plot+ 0.5% of plot/sub-plot radius • Breast Height [1] + 5.0cm of true height • DBH [2] + 0.1cm or 1% • Height [2] + 20 cm or 2% • Age [1] + 2 years or 2% If sample error [ ] exceeds 4 points the sample is rejected

  31. Standards for Dead Trees • Species (genus) [1/2] no error* • Missed Trees [1/2] no error within plot+ 0.5% of plot radius • Breast Height [1/2] + 5.0cm of true height • DBH [1/2] + 0.2cm or 2% • Wildlife Tree [1/2] + 1 class * Applies to species certainty “1” and “2” only Additional standards & error weighting are in Appendix 1 & 2

  32. Before You Go… • Run verification to ensure sample is complete • Ensure non-verifiable sample data is completed • Remove all string and garbage • Complete tie line flagging and paint • Confirm access, tie point and tie line information

  33. Contact Information For more information on the Inventory Growth & Yield Program visit our website @ http://www.for.gov.bc.ca/hts/vri/ip/index.html Or our sharepoint @ https://sharepoint.forests.gov.bc.ca/GYP/default.aspx • Contacts include; • Kevin Hardy, Coastal Forest Region • Bob Macdonald, Southern Interior Forest Region • Ron Planden, Forest Analysis & Inventory Branch

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