By Allan A. Schoenherr

ISBN-10: 0520069226

ISBN-13: 9780520069220

During this entire and abundantly illustrated e-book, Allan Schoenherr describes a kingdom with a better diversity of landforms, a wider variety of habitats, and extra forms of crops and animals than any zone of similar measurement in all of North the USA. A traditional heritage of California will familiarize the reader with the weather, rocks, soil, vegetation and animals in each one detailed zone of the kingdom.

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These sorts of population fluctuations have a minor effect on the ecosystem when there are many kinds of animals on each trophic level, but they tend to have extreme effects in simple ecosystems. Humans have a tendency to cause simplification of ecosystems and thus produce unstable ecosystems. Agriculture, for example, creates a simple ecosystem that is not < previous page page_24 If you like this book, buy it! next page > < previous page page_25 next page > Page 25 only energetically inefficient because of the laws of thermodynamics, but unstable as well.

The sun has moved northward so that it shines straight down on the Tropic of Cancer. That is where the belt of rising air generates tropical storms. Because the rising air is farther north at this time, so is the descending air, that keeps southern California dry in the summer. During late August or September occasional tropical storms move into southern California from the south. These storms are usually carried westward toward Hawaii, but some of them move into the belt of descending air where there is no surface wind to give them a westward push.

As one moves from north to south, the land warms faster than the water because air changes temperature more rapidly. During summer, when the land in southern California is considerably warmer than the water, the storm fizzles because water vapor won't condense. During winter, storm after storm makes its way down the coast. Some of the storms cause precipitation in southern California, but more rain falls in northern California. This is the basic reason that the northern half of the state gets two-thirds of California's precipitation.

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A Natural History of California (California Natural History Guides) by Allan A. Schoenherr


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