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2002 Natural Resources Management
Roseville
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2002 Natural Resources Management
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7/13/2012 10:46:09 AM
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7/13/2012 10:41:05 AM
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Community AC -U2 <br />Oak Woodland - brushland <br />Qualitative Rank: D <br />Nonnative Shrub Rank: 21 <br />Large, open -grown white and pin oak averaging over 20 inches in diameter characterize this <br />community that occurs with a disc golf course. The oaks have intermingling crowns in some <br />places, but are separated by some distance in others. The overall canopy cover for the <br />community approaches 100 percent here because the gaps between the large oaks have been <br />filled in by younger, fast - growing trees. Some of the most common of these include quaking <br />aspen, black cherry, green ash, and cottonwood. There are also select locations where trees have <br />been planted, including jack pine and silver maple. <br />The shrub layer is dense to nearly impenetrable in some locations and dominated by the <br />nonnatives glossy and European buckthorn. Nonnatives that were planted here include caragana <br />and maples. Native plants in that occur at least occasionally in the shrub layer include red - <br />berried elder, black raspberry, black cherry, and boxelder. The ground layer is very disturbed <br />here with only a few natives capable of tolerating disturbance, as well as nonnatives present. <br />Natives found here include common milkweed, Canada goldenrod, white avens, and enchanter's <br />nightshade. Nonnatives in the ground layer include deadly nightshade, butter - and -eggs, smooth <br />brome, Kentucky bluegrass, and perennial ryegrass. <br />Although the large oaks are still present here, much of the remainder of the composition and <br />structure of this community has been altered by grazing, encroachment by nonnative brush and <br />trees, and very importantly soil compaction. Also, the amount of foot traffic associated with the <br />disc golf course is causing severe soil compaction, which is slowly killing the oak trees. This <br />compactions is also hindering recovery of the shrub and ground layer in this community. For <br />these reasons, this oak community was given a much lowered rank of "D ". <br />City of Roseville 67 <br />Parks Natural Resource Management <br />
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