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a Remeasurement of “R” Permanent Sample Plots 2008 a PowerPoint Presentation
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a Remeasurement of “R” Permanent Sample Plots 2008 a

a Remeasurement of “R” Permanent Sample Plots 2008 a

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a Remeasurement of “R” Permanent Sample Plots 2008 a

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  1. a Remeasurement of “R” Permanent Sample Plots 2008 a

  2. Tie Point Plaques CENTRE FOR GROWTH Sample No.____ Plot No.____ TIE POINT FOR GROWTH Sample No._12R_ 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 _R_ 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 Use establishment date if plaques replaced

  3. Sample Search If tie line cannot be located then use a search pattern. May use GPS coordinates from map or database for approximate location. Access Notes should describe tie tree and tie line. Searching pattern for tie line (may be blazed, painted and flagged) TP

  4. Sample Configurations “R” one sample = one plot or

  5. Plot Centre Plaque CENTRE FOR GROWTH Sample No._12R_ 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 __R_ 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 Use establishment date if plaques replaced

  6. Plot Centre & Tie to Next Sample CENTRE FOR GROWTH Sample No._12R_ Plot No._1_ TIE POINT FOR GROWTH Sample No._13R_ 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 __R_ INST. NO.___ SAMPLE NO. _12_ PLOT NO._1_ -------------------------------------------- TIE POINT FOR GROWTH SA. TYPE _R_ 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 Use establishment date if plaques replaced

  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 > 4.0 cm. • A subplot centred in the main plot is used to sample approximately 20 commercial trees less than the tagging limit. • You cannot change plot or subplot area.

  8. Sample Maintenance • Centre and corner stakes flagged and cairn renewed. If stake is missing or out of ground triangulate location from plot reference trees. • Replace any dead plot reference trees • Confirm slope corrected plot perimeter • Flag perimeter for tagging sectors • String sample for 0.01 ha site sectors • Pull nails on plaques and tree tags to allow for growth • Confirm plot attributes (crown closure, slope, aspect, elevation, slope position, damage)

  9. Plot Tagging Tagging pattern flows to next sector which aids the measurement flow Do not change tagging sectors N Tags face alternate directions in odd and even sectors Note “near” tree for new or out of sequence numbers

  10. Mismatched tag and site sectors 4 Tagging Sectors from previous measure 8 Site Sectors proportionate to area/0.01ha - do not measure sectors < 0.01 ha)

  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 Tree Measurement • Not previously tagged but >10.0 cm dbh standing and >1.3m in height. Tag, measure DBH and classify dead tree attributes • Previously tagged living at last measure. Measure DBH and classify dead tree attributes • Previously tagged dead at last measure (tree class 3,4)and > 10 cm dbh • Classify dead tree attributes or • (F) if tree not found

  17. Dead Trees 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

  18. 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!

  19. Subplot Measure Subplot is a circular plot centred on plot centre stake Always use previous measure subplot. Some R samples may not have subplots. • Minimum size 0.002 ha (2.52 m) • Maximum size 1/2 smallest plot side

  20. The Subplot • Always use the previous measurement subplot • It was a circular plot centred on the plot centre stake ranging from 0.002 ha (2.52 m radius) to maximum of one half of the smallest plot side. • 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]

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

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

  23. 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

  24. 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 • Favour trees with previously measured heights • Measure in direction of painted height direction dot. • Mark/renew direction of height with a painted dot

  25. 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!

  26. 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!

  27. 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

  28. Heights on Leaning Trees

  29. 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

  30. Age Sample Trees • ‘Top height tree’ from SIBEC centre subplot and from centre plot of three plot samples. • Site Trees • New age not required if tree age previously measured • 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

  31. 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

  32. 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

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

  34. 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