ecosystem services
Natural services or natural capital that support life on the earth and are essential to the quality of human life and the functioning of the world's economies. See natural resources.
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Chapter 4 - Ecosystems: Components, Energy Flow, and Matter Cycling
ecosystem
Community of different species interacting with one another and with the chemical and physical factors making up its nonliving environment.
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ecosphere
See biosphere.
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ecology
Study of the interactions of living organisms with one another and with their nonliving environment of matter and energy; study of the structure and functions of nature.
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ecological efficiency
Percentage of energy transferred from one trophic level to another in a food chain or web.
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ecological diversity
Variety of forests, deserts, grasslands, oceans, streams, lakes, and other biological communities interacting with one another and with their nonliving environment. See biodiversity. Compare functional diversity, genetic diversity, species diversity.
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DNA (deoxyribonucleic acid)
Large molecules in the cells of organisms that carry genetic information in living organisms.
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(DO)
content temperature and pressure, often expressed as a concentration in parts of oxygen per million parts of water. See biological oxygen demand.
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dissolved oxygen
Amount of oxygen gas (O2) dissolved in a given volume of water at a particular
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dew point
Temperature at which condensation occurs for a given amount of water vapor.
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