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14 ATTACHMENT 6 - Appendix A - E
City of Pleasanton
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021522
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14 ATTACHMENT 6 - Appendix A - E
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2/10/2022 11:41:35 AM
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CITY CLERK
CITY CLERK - TYPE
AGENDA REPORT
DOCUMENT DATE
2/15/2022
DESTRUCT DATE
15Y
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14 ATTACHMENT 1-5
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14 ATTACHMENT 6 - Appendix F - I
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16 <br />of the site, and three reaches of isolated intermittent drainages (totaling 692 linear feet) that <br />occur in the central portion of the open space area. These channels have been observed to be <br />completely dry during numerous site visits conducted between 2014 and 2017, and are either <br />barren of vegetation or support primarily upland species such as wild oats, soft chess, bull thistle, <br />bindweed, Bermuda grass (Cynodon dactylon), spike rush, Italian rye grass (Festuca perennis), <br />summer mustard, barley, prickly lettuce, bird’s foot trefoil, milk thistle, and clover (Trifolium <br />sp.). Wildlife expected to occur in the adjacent grassland habitats would be expected use this <br />habitat type as well. <br />2.1.3 Seasonal Wetland <br />Four seasonal wetlands occur on the site. Three of these wetlands, totaling 0.85 acres are isolated <br />and occur on slopes within the open space areas of the site, at or above the 25% slope line. Slope <br />stabilization occurring within the open space area will impact one of these wetlands (Wetland 2, <br />totaling 0.02 acre). The fourth wetland (0.45 acres) occurs near the site’s boundary near Alisal <br />Street. <br />Hydrophytic species dominant in these seasonal wetland areas, along with their wetland <br />indicators, included Mediterranean canary grass (Phalaris arundinacea) (FACW) and <br />Mediterranean barley (Hordeum marinum) (FAC). Wetlands of the site have been completely <br />dry during all site visits from 2014 through 2016. Wildlife expected to use the seasonal wetlands <br />of the site would be similar to those described in adjacent habitats. <br />2.2 MOVEMENT CORRIDORS <br />Ecologists and conservation biologists have expended a great deal of energy since the early <br />1980’s advocating the protection and restoration of landscape linkages among suitable habitat <br />patches. Movement corridors or landscape linkages are usually linear habitats that connect two <br />or more habitat patches (Harris and Gallager 1989), providing assumed benefits to the species by <br />reducing inbreeding depression, and increasing the potential for recolonization of habitat <br />patches. Some researchers have even demonstrated that poor quality corridors can still provide <br />some benefit to the species that use them (Beier 1996).
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