PERMFILE71783

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 3/13/1992
• Doc Name: Miscellaneous
• Section_Exhibit Name: Appendix W 1991 Report Section 7.0
• Media Type: D
• Archive: No

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`r1 SECTION 7.0
7.l Vegetation Monitoring for Seeding Exclusion in 1989 Derringer Pit Topsoil Area
(1991 Sampling Year)
As required by the Division (TR-06), Trapper is submitting yearty vegetation sampling measurements for
the no seed topsoil plot (56 ac) established in Derringer Pit in 1989. The attached table 7-I provides a list of
the plant species encountered, herbaceous canopy cover, herbaceous primary production and woody stem
densities. Vegetation sampling was conducted in the same manner on the exclusion pots as on other
reclaimed areas.
Methods
Herbaceous plant canopy cover, annual primary production, and woody stem densities were measured in
1991 on non-seeded plots (Derringer Pit) and seeded aaeages in Derringer and Enfield pits (1981-1989
reclamation). Three permanent 100-meter trattsects spaced 10 m apart were established in each reclaim
year in each pit in range sites A, B, and C. Herbaceous plant canopy cover and percent mulch cover were
estimated by species using the point-hi[ technique (Optical Point Bar). Each 100-meter permanent line
vansec[ was estimated at each site and ]0 observations recorded along each line transact at 10-meter
interval (total 100 contacts/transact).
Miscel{aneous
Doc Date:12/1112001
• Annual herbaceous primary production was estimated by clipping plots (20 m interval) in each reclaim area
(both range site A, B and C) by year. One-quarter-meter plots were clipped (total), weighed with a spring
scale, placed into a labeled paper sack, and brought to the laboratory for drying and weighing. Oven drying
was performed at 50 degrees centigrade fora 24-hour period.
Woody stem density was calculated using the point-center-quarter (PCQ) method. Five PCQ's were
conducted on~ach line transact at 20-m spacing. Distances from the center of each PCQ to the nearest live
stem in each quarter was recorded and the plant species identified.
Results
As expected, vegetation response during the second growing season on the seeding exclusion plot is
dominated by annuaWiannual plant species (Table 7-1). The herbaceous canopy cover provided by all
plants was approximately 65 percent. Perennial plants represented 31 percent of the total herbaceous cover.
Litter cover was approximatey 12 percent. Primary herbaceous production in 1991 was 1484 #/ac.
Five woody plants (Saskatoon Serviceberry, Big Sagebrush, Common Chokecherry, Antelope Bitterbrush
and Mountain Snowberry) are represented in the 1991 woody stem density inventory. The approximate
woody stem density for the seeding exclusion area (RSA and RSB) is 37 sterns per acre. As predicted, the
woody plant density decreased from that reported in 1990, Trapper will continue to evaluate woody plant
response during future sampling years.
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