SCHEDULE

1
SCHEDULE
2
From Last Week Example

• In this project, the source cells are the last
  segments of the roads leading to the mill
  Roads223 Roads256
• What is the skidding cost in /mbf/ft if the
  average skidding cost is 30/mbf for a setting
  with an average skidding distance of 500
• Map skidding costs using this single cost
  everywhere across the landscape (no roads).
• Add roads with an appropriate truck haul cost,
  and rerun.
• Recalculate skidding costs assuming skidding
  costs increase linearally from 30/mbf for flat
  topography to 60/mbf for 40 slopes. Rerun haul.

3
From Last Week (continued)

• Revise cost grid to prohibit skidding (but not
  truck haul) across streams.
• Soil erosion increases with soil disturbance. For
  each cell, calculate its traffic volume (number
  of cells that are accessed by skidding/driving
  over that cell). Which non-road cells get the
  most traffic? Should we add a road there?
• We might want to eliminate some of our road
  density. Identify and eliminate the road segments
  that carry the least traffic. By how much does
  this increase transport costs, averaged over the
  planning area?

4
MIDTERM 2

• In class, 1/3 pictures, 2/3 short answer
• Field trip attendees, makeup on Friday.
• Take home, due Tuesday (five days!).
• Perhaps, write report as you work.
• Study group 3pm Tuesday, Spit lab.
• Exams do not include new stuff from todays
  lecture.

5
OUTLINE

• Habitat Delineation
• Total Habitat Areas
• Habitat Blocks
• Edges
• Interiors
• Migration Paths
• Foraging Distance

6
HABITAT DELINEATION

• Define species specific habitat
• stand age
• species
• stream proximity
• road aversion
• elevation

7
Example

• We might classify stands by age
• 1. Stand initiation (say, 0-10 years)
• 2. Stem Exclusion (say, 10-40 years)
• 3. Understory reinitiation (40-100 years)
• 4. Old Growth (say, gt100 years)
• Reclassify the gridded HJ Andrews stand cover

8
TOTAL AREAS

• How much is there of each habitat?
• (value.ZonalStats(GRID_STATYPE_MEAN, zone,
  Prj.MakeNull, zone.GetVTab.FindField("Value"),
  FALSE))
• EXAMPLE
• Identify total areas of each stand class.
• Identify fraction of the total area in each stand
  class.

9
BLOCKS

• The size of contiguous habitat blocks can be
  important. Unconnected blocks of the same kind
  can be identified separately
• aGrid.RegionGroup(noDiagNbrs, crossClass,
  excludedValue)
• EXAMPLE
• Identify the size of each contiguous block of
  equal stand age class.

10
EDGES

• Edges can be areas of high diversity
• aGrid.FocalStats (aGridStaTypeEnum, aNbrHood,
  noData)
• EXAMPLE
• Identify the distance from the center of each
  cell to the nearest block edge.

11
INTERIORS

• Interior areas can also be important to species
  that are averse to the other stand type.
• EXAMPLE
• Identify interior spaces as those at least 150
  from the nearest block edge.

12
MIGRATION PATHS

• Migration paths can be identified by
• 1. Cost distance function
• 2. Weighting by issues
• 3. Source one edge
• EXAMPLE
• What is the cost for animals to move from the
  north edge, assuming a cost proportional to
  slope.
• Add an cost of 1000 per age 1 or 2 cell

13
FORAGING DISTANCE

• Instead of moving across the map, we can apply
  the same techniques to consider the cost of
  moving between nesting and foraging areas.
• Identify old growth areas gt150 from an edge as
  nesting areas.
• Use an equal weighted cost grid.
• Identify age class 12 as foraging area and