Dense strands of algal growth that cover the water surface between the emergant aquatic plants. Spirogyra is commonly responsible for this growth.

tiny organisms like algae and diatoms that cling to the underwater roots of aquatic plants.

Microscopic algae, bacteria, and fungi that grows on the bottom substrate (e.g., rocks, logs) of a stream or river. Does not include macroscopic algae, such as Cladophora, Spirogyra, Chara, and Vauche [..]

biology - sessile organisms covering surfaces in freshwater aquatic environments

Microscopic plants and animals that are firmly attached to solid surfaces under water such as rocks, logs, pilings and other structures.

Microscopic underwater plants and animals that are firmly attached to solid surfaces such as rocks, logs, and pilings.

Microscopic underwater plants and animals that are firmly attached to solid surfaces such as rocks, logs, and pilings.

Organisms, such as algae and small crustaceans, that live attached to surfaces projecting from the bottom of a freshwater aquatic environment.

algae growing on any surface within a body of water (lake or stream)

Microscopic plants and animals that are firmly attached to solid surfaces under water, such as rocks, logs, pilings, and other structures.

Plants, usually algae, attached to rocks or other instream objects.

Any organism in a water body, for example a micro alga or diatom, which attaches itself to the bottom (benthic) or to a stem or leaves of a plant either individually or together with others forming a mat.They may be attached or may float free in the water column. The biological community of microscopic plants and animals attached to surfaces in aqu [..]

(ecology) A mixture of algae, cyanobacteria, heterotrophic microbes, and detritus that is attached to submerged surfaces in most aquatic ecosystems. * 2009|January 30|R. S. Oremland et al.||Science [..]

A complex mixture of algae, cyanobacteria, microbes and detritus that’s attached to submerged surfaces (such as rocks) in most aquatic ecosystems. Periphyton plays an important role by being a food so [..]