Wildlife Tree Retention - PowerPoint PPT Presentation

Loading...

PPT – Wildlife Tree Retention PowerPoint presentation | free to view - id: 12673f-ZjYxM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Wildlife Tree Retention

Description:

Over 80 species of wildlife are critically dependent on ... Design patches to minimise windthrow. If no valuable trees then choose for long term retention ... – PowerPoint PPT presentation

Number of Views:37
Avg rating:3.0/5.0
Slides: 24
Provided by: ilmbg
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Wildlife Tree Retention


1
  • Wildlife Tree Retention

2
Wildlife tree retention
  • One of most valuable components of stand-level
    biodiversity
  • Over 80 species of wildlife are critically
    dependent on wildlife trees
  • WTR is an important part of forest stewardship
    and ecosystem integrity

3
Wildlife tree retention
  • Legal Definitions
  • Wildlife tree - a tree or a group of trees that
    are identified in an operational plan to provide
    present or future wildlife habitat (OPR sec. 1)
  • Dangerous tree - any tree that is hazardous to
    workers because of location lean, physical
    damage, overhead hazards etc. (WCBR sec 26)

4
Ecological Guiding Principles
  • Choose wildlife trees considering
  • areas with valuable wildlife tree attributes
  • uncommon species (with wildlife value)
  • leaving a range of patch sizes and individual
    retention
  • interpatch distance (500 m)

5
Ecological Considerations
  • Retention is for a minimum of one rotation
  • Design patches to minimise windthrow
  • If no valuable trees then choose for long term
    retention
  • leave downed trees for CWD

6
Salvage
  • THPR Sec. 28 - no salvage in WTP unless approved
    in SP or in writing from DM
  • Salvaged WTPs should be replaced

7
Rocks, swamps marginal areas
  • Max of .25 ha of non-treed area within a patch
  • marginally treed areas count as a of full
    stocking

8
Seed and Shelterwood trees
  • Can count to retention target if left for full
    rotation

9
Stubbing
  • Encouraged as compliment for wildlife tree
    retention
  • Not recommended as contributing towards retention
    target

10
Wildlife tree retention
  • Forest Practices Code Timber Supply Analysis
    document (Feb 96) estimated that wildlife tree
    retention would have a
  • 1.8 Provincial impact on timber supply, or
  • 2.8 Provincial impact in the absence of LU
    objectives for OGMAs

11
Wildlife tree retention
  • Why is WTR being addressed through landscape unit
    planning
  • LU objectives will ensure a sound legal basis
    for WTR management
  • FDP is guided by and must be consistent with the
    HLP objectives

12
Wildlife tree retention
  • What needs to be done?
  • Calculation of WTR
  • Determine total WTR
  • Set THLB cap (default is 50 or 25)
  • Setting WTR objectives

13
Wildlife Tree Retention - Calculation
14
Table A3.1
15
(No Transcript)
16
WTR- Variation in THLB cap
  • main reason for allowing variation is to ensure
    subzones with little non-contributing have
    adequate WTR
  • calculated PRIOR to setting LU objectives
  • result is
  • varies THLB cap
  • overall impact stays constant

17
Wildlife tree retention - calculation
  • Determine the THLB WTR target
  • interior example - maximum 50 of total WTR
    target will be retained from the THLB.
  • Calculate the THLB WTR target hectares by
    multiplying the total WTR percentage by 50 and
    by the crown forested area.
  • 8 x 50 x 58,957 2,358 hectares

18
WTR Spread Sheet
19
Stand level variation
  • LU objective may allow variation at the stand
    level for biological reasons
  • Controlled within each FDP
  • Total WTR objective and THLB cap met over the
    cutblocks within the FDP without exceeding the
    THLB cap

20
Wildlife tree objective
  • Retain 8 of each cutblock within the SBSdk as
    wildlife trees subject to the following
  • All NC with suitable wildlife trees must first be
    used to achieve the overall cutblock target
  • A maximum of 4.8 of each cutblock can be
    retained for wildlife trees located in the THLB
  • It is acceptable to vary from the 8 and/or 4.8
    for biological reasons, provided the average of
    the cutblocks within the SBSdk equal the 8 and
    up to 4.8 when averaged over all cutblocks in
    the SBSdk subzone within the FDP area.

21
Wildlife tree strategy
  • Example Strategy
  • Every block should have some area reserved for
    WTR
  • Where practical, retain wildlife trees in both
    patches and individually

22
Wildlife Tree Retention
  • Tracking
  • SP mapping to .25 ha
  • Forest Cover mapping 2 ha and greater
  • Auditing/Monitoring
  • to be based on aggregate of many SPs
  • developed over next several years

23
Wildlife Habitat Value
About PowerShow.com