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Diegan Coastal Terraces

Ecoregion in CA

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The Diegan Coastal Terraces ecoregion inlcudes nearly level to gently sloping dissected marine terraces, and a narrow strip of beach and dune sand along the coast from Newport Beach south into Mexico’s Baja California. The ecoregion is modified greatly by oceanic influence. Soil temperatures are thermic and soil moisture regime is xeric. Vegetation is mostly coastal sage scrub, with maritime succulent, Diegan coastal sage scrub, and chaparral communities. California sagebrush, California buckwheat, black sage, ceanothus, coast live oak, and annual grasslands occur. A few vernal pools remain, as well as a small coastal stand of rare Torrey pines. Runoff is rapid except from undissected terraces with vernal pools. Urban and suburban land cover is widespread.

— EPA

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