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Southern Channel Islands

Ecoregion in CA

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The Southern Channel Islands ecoregion consists of the San Nicolas, Santa Barbara, Santa Catalina, and San Clemente Islands. These northwest-trending islands have some similarities to the Northern Channel Islands ecoregion (85i), although there are some warmer ocean currents, higher average air temperatures, slightly less precipitation, less woodland, and more open xeric scrub vegetation. Ecoregion 85j has larger distances between islands and a more diverse flora than Ecoregion 85i, with more xeric components. Steep mountains and hills and dissected marine terraces occur, with a high elevation of 2,123 feet on Santa Catalina Island. The maritime climate is frost-free, soil temperature regimes are mostly thermic, and soil moisture regimes are ustic and xeric.

— EPA

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Ecoregion