2002 Natural Resources Management

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should allow native plants a better opportunity to establish here. Less common members of the shrub layer include boxelder, green ash, black raspberry, gooseberry and red - berried elder. The ground layer composition reflects a recent, and relatively fast transition from a semi -open area to almost closed canopy. The prevalence of nonnative shrubs, along with the recent increase in shadiness and absence of natural disturbances such as fire have all likely been a factor in delaying the establishment of woodland flowers and graminoids. The ground layer also indicates a history of moderate to intense long -term grazing because of the amount of thorny species. Community Activity Priority Estimated Cost Comments RW -U7 Cut Buckthorn High $2,000 per acre, Cut and treat all stumps with 25- and other or about 40 -60 50% solution of Roundup or Garlon. nonnative shrubs hours volunteer Stack brush away from oak crowns labor per acre and burn in winter. Cut before burning in any particular area. Re- plant with native seed /plants where bare soil exists. RW -U7 Reintroduce High $500 — 500+ Reintroduce appropriate local origin appropriate depending on plant materials through planting of native species number of plugs or seed, particularly where species, plants, bare ground is left from brush seed. Allow 20- clearing. Along with burning, this 30 volunteer will be an important step in long - hours to plant term control of buckthorn and nonnative shrubs. RW -U7 Correct Erosion Medium $2,000 -5,000 for Erosion occurs in several locations Areas each area on hillsides. Corrective action such as bioengineering should be used to manage these RW -U7 Apply Medium $1,000 - 200 Burning will help keep nonnative Prescribed Fire per event shrubs in -check and allow desirable native graminoids and forbs to better establish City of Roseville 130 Parks Natural Resource Management