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'n was recently (1988) designated <br /> The San Joaquin Valley Air base Y <br /> hs a nonattainment area for ozone, particulates and carbon <br /> monoxide. <br /> Community Type: Urban. <br /> Major Economic Activities: Commercial and "clean" industrial <br /> activities. <br /> Housing Type and Mix: Approximately 72% single-family dwellings , <br /> 8% duplex or triplex units , with the remainder evenly split <br /> between multiple-family dwellings and mobile homes (City of <br /> Manteca, only) . <br /> Present Population, Manteca plus Raymus Village: 40 ,914 (1990) <br /> Lathrop: 5 ,600 (1988 , San Joaquin County records) . <br /> Major Botanical Features of: <br /> a. Service Area: Riparian shrubland and woodland along <br /> streams and drainage canals ; agricultural fields around the <br /> urban zone; urban landscaping. <br /> b. Facilities Site: Mostly agricultural fields <br /> in vicinity. <br /> c. Disposal/Irrigation Site: Same as for facilities site. <br /> Riparian shrublands and woodlands are water-dependent habitats <br /> that occur along the levees and banks of waterways. These <br /> habitats are frequently thin strips of vegetation between the <br /> waterways and the adjacent upland habitats. Riparian shrubland <br /> is subject to more frequent flooding than is riparian woodland. <br /> If left undisturbed, most riparian shrubland would eventually <br /> develop into riparian woodland. Cottonwoods , sycamores , white <br /> alder, valley oaks, willows , and Oregon ash are common trees in <br /> riparian zones of this area. Riparian shrubland is frequently <br /> dominated by smaller willows , blackberries , buttonbush, wild <br /> rose, and wild grapes. <br /> Riparian woodland supports a high diversity of wildlife, <br /> reflecting the great habitat diversity provided by trees , dead <br /> snaps , shrubby understory, and varied ground cover adjacent to <br /> open waters and marshland. The multilayered woodland provides <br /> many different places , or niches , for nesting, feeding, and cover <br /> for different wildlife species. The valley elderberry longhorn <br /> beetle , a threatened species , is endemic to moist valley oak <br /> woodlands along the margins of rivers and streams in the lower <br /> Sacramento and upper San Joaquin Valley of California, where <br /> elderberry, its foodplant, grows. During the past 150 years over <br /> 90 percent of the riparian habitat in California has been <br /> destroyed by agriculture and urban development. <br /> 2 <br />