Download A Natural History of California (California Natural History by Allan A. Schoenherr PDF

By Allan A. Schoenherr

During this complete and abundantly illustrated booklet, Allan Schoenherr describes a kingdom with a better diversity of landforms, a greater diversity of habitats, and extra varieties of crops and animals than any zone of an identical dimension in all of North the United States. A normal heritage of California will familiarize the reader with the weather, rocks, soil, crops and animals in every one special zone of the country.

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Storms develop as low-pressure areas over the ocean. Air rises, carrying with it evaporated water. Wind on the surface of the earth therefore blows toward a low-pressure cell. In the northern hemisphere, air moving across the surface to replace the rising air of a low-pressure cell must turn to the right, which gives the mass a counterclockwise spin. This spinning mass is similar to a spinning top. It moves randomly unless other forces give it a direction. Prevailing winds provide this direction.

The overall effect is that along the Atlantic coast some form of measurable precipitation occurs every month of the year. There is no true dry season. The center of the North American continent tends to be dry because it is a long way from the ocean, the main source of water. Pacific storms, during summer, are deflected over the Midwest by the southern belt of high pressure. In winter, strong storm systems carry precipitation all the way to the interior (fig. 7A). Furthermore, during summer, thunderstorms from the southern storm belt carry northward across the Gulf of Mexico all the way to the plains states (fig.

2 Transfer of energy in ecosystems. (Animal illustrations by Ellen Blonder, from J. Verner and A. S. Boss. California Wildlife and Their Habitats: Western Sierra Nevada, Gen. Tech. Rep. PSW-37, Berkeley: Pacific Southwest Range Exp. , Forest Service, USDA, 1980. ) < previous page page_22 If you like this book, buy it! next page > < previous page page_23 next page > Page 23 Food Pyramids A food chain is the sequence by which energy is transferred from sunlight, to green plant, to herbivore, to carnivore.

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