An assemblage is the set of related organisms that represent a portion of a biological Community (e.g., benthic macroinvertebrates).
Other /More definition:
An Assemblage is an association of interacting populations of organisms in a given waterbody. Examples of Assemblages used for biological assessments include : algae, amphibians, birds, fish, herps (reptiles and amphibians), macroinvertebrates (insects, crayfish, clams, snails, etc.), and vascular plants.

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Aquatic Assemblage ■■■■■■■■■■
An Aquatic Assemblage is an Organism group of interacting populations in a given waterbody, for example, . . . Read More
Community component ■■■■■■■
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Assemblage structure ■■■■■■■
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Vegetation ■■■■■■
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Fishery ■■■■■■
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Biotic Community ■■■■■
A Biotic Community is a naturally occurring assemblage of plants and animals that live in the same environment . . . Read More
Ecological Integrity ■■■■■
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Ecosystem ■■■■■
An ecosystem is an interconnected and symbiotic grouping of animals, plants, fungi, and microorganisms. . . . Read More
Biomass ■■■■■
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Algae ■■■■
An Algae is a simple rootless plant that grow in sunlit waters in proportion to the amount of available . . . Read More