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N 0 V 41986- sooK 66 � a x.1318 - requirement for preservation may not be aceomplishincl anything at all. As an example, the 25% preservation requirement, applied to a 10,000 square foot single-family lot, will not provide meaningful wildlife habitat for larger mammals. Likewise, it is questionable if water consumption will be materially reduced on small single-family lots where a small percentage of native landscaping is surrounded by non-native species needing greater quantities. Alternative #4: Percentage Requirement Combined With A Native Landscaping Requirement Based Upon Land Use & Size This alternative would provide various preservation criteria based upon parcel size and land use. The concepts envisioned in this alternative are: -61 1) Exempt single family residential lots from the preservation requirements; however, require that new landscape material installed (except lawn areas) be native or drought tolerant vegetation. 2) Base the percentage of native vegetation preservation on the size and use of a parcel of land which is not designated for single family use. - 3) Require that new development proposals requiring site plan approval provide the specified percentage of native vegetation for landscape purposes on sites that do not contain sufficient vegetation to meet the percentage requirement after development. Also require that new landscape material installed be native or drought tolerant vegetation. The principal advantage -of this scenerio is that a balance between natural resource preservation and use of properties can be obtained by including native landscaping in already disturbed areas. In contrast, disadvantages include: 1) A disproportionate burden for native preservation/land- scaping on large developments; 2) Areas on the barrier island comprised of small, single- family lots will not have the same degree of preservation of water conservation as large, multiple -family land tracts. RECOMMENDATION: While staff foresees inherent deficiencies with each alterna- tive presented, it recommends Alternative #4 - Percen- tage/Landscape Requirement Based Upon Land Use & Size because this scenerio will offer the greatest.degree of flexibility in achieving the stated objectives of water conservation and habitat preservation while minimizing infringement of property rights. Staff further recommends that the Board of County Commissioners direct staff to conduct public workshops for input based upon Alternative #4, prepare an ordinance and advertise the proposed ordinance for the necessary public hearings 36 M