By Allan A. Schoenherr
During this finished and abundantly illustrated e-book, Allan Schoenherr describes a nation with a better diversity of landforms, a wider variety of habitats, and extra forms of crops and animals than any zone of an identical measurement in all of North the US. A average heritage of California will familiarize the reader with the weather, rocks, soil, vegetation and animals in every one special quarter of the nation.
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Additional resources for A Natural History of California (California Natural History Guides)
Summary Ecosystems are composed of living and nonliving components. The living components include producers (green plants), consumers (animals), and decomposers (micro-organisms). The nonliving components include light, heat, air, water, and soil (minerals). The source of all energy in ecosystems is sunlight. Energy flows through ecosystems in one direction. Its transfer is not very efficient, as dictated by the first and second laws of thermodynamics. Matter and materials cycle through the ecosystem.
In other words, the process of photosynthesis converts solar radiation to the energy locked up in food molecules. This step may be symbolized in this way: More specifically, the chlorophyll in green plants absorbs light energy and uses it to rearrange molecules of carbon dioxide gas from the air and water from the soil to form energy-rich carbohydrate molecules. The chemical notation for carbohydrate < previous page page_20 If you like this book, buy it! next page > < previous page page_21 next page > Page 21 is CH2O, which indicates that it is composed of carbon and water.
Proteins have three uses in living organisms: (1) to form structures (skin, hair, muscle), (2) to provide energy (4 Cal/g), and (3) to act as enzymes that regulate chemical reactions. The conversion of nitrogen gas to amino acids is known as nitrogen fixation. Unfortunately, most organisms in the ecosystem are unable to carry out this process. To them, nitrogen gas is inert. Some micro-organisms, such as certain soil bacteria and blue-green algae (Cyanobacteria), have the ability to fix atmospheric nitrogen.
A Natural History of California (California Natural History Guides) by Allan A. Schoenherr