INTERACTIONS BETWEEN ORGANISMS . AND …

INTERACTIONS BETWEEN ORGANISMS . AND ENVIRONMENT 2 1 FUNCTIONAL RELATIONSHIPS An understanding of the relationships BETWEEN an organism and its environment can be attained only when the environmental factors that can be experienced by the organism are considered. This is difficult because it is first necessary for the ecologist to have some knowledge of the neurological and physiological detection abilities of the organism. Sound, for example, should be measured with an instrument that responds to sound energy in the same way that the organism being studied does. Snow depths should be measured in a manner that reflects their effect on the animal.

Color vision, for example, is characteristic of man, monkeys, apes, most birds, some domesticated animals, squirrels, and, undoubtedly, others. Deer and other wild ungulates probably detect only shades of grey. Until definite data are ob­ tained on the nature of color vision in an animal, any measurement based on

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  Organisms, Between, Deer, Interactions, Color, Vision, Color vision, Interactions between organisms

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