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Chapter 3 - Natural Resources - Marine Corps Base Camp Pendleton

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Integrated <strong>Natural</strong> <strong>Resources</strong> Management Plan [March 2012 - Update]<br />

MCBCP Status<br />

The arroyo toad receives programmatic protection from training and other <strong>Base</strong> activities<br />

within the riparian component of its habitat through programmatic instructions provided to<br />

users and residents of the <strong>Base</strong> as part of the Riparian Ecosystem Conservation Plan<br />

(Appendix C) and <strong>Base</strong> Order P3500.1M (Range and Training Regulations). The <strong>Base</strong> is<br />

currently in consultation with USFWS regarding Upland habitat basewide including habitat<br />

occupied by the arroyo toad. Management details, survey information, etc., for the arroyo<br />

toad are located in Appendix F, Section F.1.<br />

DISTRIBUTION<br />

Global<br />

Endemic to southern California, arroyo toads were found historically in coastal and some<br />

desert drainages from Monterey County, California south to San Quintin, Baja California,<br />

Mexico (Sweet 1993). Arroyo toad populations in California persist in headwater areas of<br />

streams in Santa Barbara, Ventura, Los Angeles, Riverside, and San Diego counties. The<br />

majority of the remaining populations in Santa Barbara and Ventura counties are in Los<br />

Padres National Forest (five viable populations); Sespe Creek in Ventura County has the<br />

largest known population; and other populations occur in the Sisquoc, Santa Ynez, and<br />

upper and lower Piru drainages (USFWS 1994e).<br />

Regional<br />

Arroyo toads occur in San Diego<br />

County along the Santa Margarita<br />

River, San Onofre Creek, San<br />

Mateo Creek, Sweetwater River,<br />

Vallecitos Creek, San Luis Rey<br />

River, San Dieguito River/Santa<br />

Ysabel Creek, Tijuana<br />

River/Cottonwood Creek, San<br />

Diego River, Otay River, and San<br />

Felipe Creek drainage basins.<br />

Arroyo toads are present in<br />

Orange County along the Santa<br />

Ana River, San Juan Creek, and<br />

San Mateo Creek drainage basins.<br />

Arroyo toads are found in<br />

Riverside County along the<br />

Whitewater River, Santa Ana<br />

River, San Juan Creek, San<br />

Mateo Creek, and Santa<br />

Margarita River drainage basins.<br />

The species is also found in San<br />

Bernardino County in the Mojave<br />

River drainage basin, and in<br />

Imperial County in the Pinto Wash<br />

drainage basin (USFWS 1999a).<br />

FIGURE 3-31.<br />

ARROYO TOAD LOCATIONS<br />

<strong>Chapter</strong> 3 – <strong>Natural</strong> <strong>Resources</strong> 3-65

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