LFRWMP Bird Monitoring Site Selection Methods (4/28/05 Rough draft)
1) Limit watershed areas to less than 120 sq. km. for bird monitoring purposes
2) Purpose: select 10 roadside bird monitoring sites where a road intersects a stream
3) 5 sites along the main stem of stream, 5 sites along tributaries
4) GIS used to randomly select points for monitoring sites
a. Roads intersected with 1:24k hydrology with ARCVIEW extension (themes intersect to points) to create point shapefile with database fields from road and hydrology layers
b. Extraneous points removed or labeled in fields accordingly (e.g., where extra points are near or in the same location, or density of points is too great
c. Field added to shapefile to show which points to display and a field for a random number
d. Random # function used to assign random numbers to field (0-10,000).
e. Rows sorted in ascending order of random number field, and then added ranking from 1 to last point with “add unique value” from Alaska_Pak AV-extension, which automatically adds another field with the ranking, and saves the file.
5) Labeled the potential bird monitoring sites based on the randomly-assigned numbers (sites with high random #’s often not labeled or even shown for clarity)
6) Site Selection Rules:
a. Use order of random #’s to select main stem and tributary sites starting with #1.
b. Select 5 main stem sites, then 5 tributary sites
c. If a site is too close (within 800 meters or ˝ mile of an already selected point), then choose the next highest random #. This same rule applies if a site is too noisy, or there is another reason not to use the location.