California

California is a state located on the west coast of the United States. It is the most populous state in the U.S., as well as physically the most diverse, with the highest and the lowest points in the lower 48 states located within 150 miles of each other. If California were an independent nation, it would have the fifth largest economy in the world (see economy of California). The state's official nickname is "The Golden State" in reference to California's 1849 Gold Rush. {{ref|origin_of_nickname}} California's U.S. postal abbreviation is CA, and its Associated Press abbreviation is Calif.

Ecology

Ecologically, California is one of the richest and most diverse parts of the world, and includes some of the most endangered ecological communities. California's diverse geography, geology, soils and climate have generated a tremendous diversity of plant and animal life. The State of California is part of the Nearctic ecozone, and spans a number of terrestrial ecoregions, and is perhaps the most ecologically diverse state in the United States.

Related Topics:
Nearctic - Ecozone - Terrestrial ecoregions

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California has a rather high percentage of endemic species. California endemics include relict species that have died out elsewhere, including the redwoods and the Catalina Ironwood (Lyonothamnus floribundus). Many other endemics originated through differentiation or adaptive radiation, whereby multiple species develop from a common ancestor to take advantage of diverse ecological conditions. California's great abundance of species of California lilac (Ceanothus) is an example of adaptive radiation. Many California endemics have become endangered, as urbanization, logging, overgrazing, and the introduction of exotic species have encroached on their habitat. Furthermore, California is home to the largest trees in the world, the Giant Sequoias.

Related Topics:
Endemic - Adaptive radiation - Ceanothus

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California's native grasses were perennials, which stayed green year-round in most of the state's subclimates{{ref|native_grasses}}. After European contact, these were generally replaced by invasive species of European annual grasses; and, in modern times, California's hills turn a characteristic golden brown in summer and fall. California's nickname The Golden State is in reference to the California Gold Rush, and not to the golden brown summer hillsides as is sometimes stated.{{ref|origin_of_nickname}}

Related Topics:
Perennials - Invasive species - Gold Rush

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