| ecology |
The scientific study of relationships between organisms and their environment. It is concerned with the life histories, distribution, and behavior of individual species as well as the structure and function of natural systems at the level of populations, communities, and ecosystems.
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| ecological |
The number of species at each trophic level and the number of trophic levels in a community.
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| ecological |
Bronfenbrenner's view of development, involving five environmental systems-microsystem, exosystem, ecosystem, macrosystem, and chronosystem. These emphasize the role of social contexts in development.
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| echo |
In radar, a general term for the appearance, on a radar display, of the radio signal scattered or reflected from a target. The characteristics of a radar echo are determined by 1) the waveform, frequency, and power of the incident wave; 2) the range and velocity of the target with respect to the radar; and 3) the size, shape, and composition of the target. See also target signal, blip.
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| ecosphere |
The atmosphere, oceans, biosphere (plant and animal life), and top portion of the earth's crust, which are involved in complex interactions defining ecology. Namely, this is the mutual relation between organisms and their environment over the spherical surface of the earth.
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