and/or enhancement could make up the balance of the mitigation measures. Preservation is usually looked at as a recommended avoidance measure, but preservation and protection of significant wetlands can be part of the entire project's measures to be considered. Instances involving lower-quality habitat impacts may be mitigated by nonnative exotic plant removal.

Freshwater marsh restores more successfully than a multilayered willow riparian community, which may have a significant temporal loss component in its mitigation requirements.

Temporary impacts should preferably be restored on-site and should account for mitigation for the temporal loss.

The above ratios consider acreage of impact. Individual tree ratios/ requirements can be incorporated as part of the plan to ensure sufficient mitigation. Also, guidelines for impacts to individual mature oak and sycamore trees are mitigated based on the size of tree impacted, at appropriate planting centers and with appropriate native understory. This may require the applicant to obtain additional land beyond that required for the habitat acreage requirement as described above.

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