an extremely localized, small-scale environment, as a tree stump or a dead animal.

1930–35; micro- + habitat

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World English Dictionary
microhabitat (ˌmaɪkrəʊˈhæbɪtæt)
ecology the smallest part of the environment that supports a distinct flora and fauna, such as a fallen log in a forest

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American Heritage
Science Dictionary
microhabitat   (mī'krō-hāb'ĭ-tāt')  Pronunciation Key 
See microenvironment.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Microhabitat measurements and occupancy data were recorded for each tag.
Microhabitat variables described the vegetative structure, tended to vary within a stand, and required measurements in the field.
Habitat suitability criteria for fish were developed from detailed fish-community sampling and microhabitat observations.
Typical adult microhabitat consists of deep, nearshore pools adjacent to swifter riffles and runs.
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