Periphyton: Microscopic underwater plants and animals that are firmly attached to solid surfaces such as rocks, logs, and pilings.
Permeability: The rate at which liquids pass through soil or other materials in a specified direction.
Periphyton: organisms that live attached to underwater substrates
Petals: floral parts interior to the sepals and exterior to the pistil and anthers
Petiole: the stalk portion of a leaf that attaches the leaf blade to the stem at the node ...
periphyton Microscopic plants and animals that are attached firmly to solid surfaces under water, such as rocks, logs, pilings, and other structures.
peritrichous Having the entire surface of the cell covered with flagella.
Periphyton: Plants, usually algae, attached to rocks or other instream objects.
pH: Measure of acidity. Stands for Òthe negative logarithm of free hydrogen ionsÓ in water. Water of low pH is acidic; high pH is basic, or alkaline.
periphyton the biota attached to submersed surfaces; community of sessile organisms on lake and stream substrata
permafrost. permanently frozen soil.
pH. a measure of hydrogen ion concentration or acidity.
Eutrophication - Eutrophication is a process whereby water bodies, such as lakes, estuaries, or slow-moving streams receive excess nutrients that stimulate excessive plant growth (algae, periphyton attached algae, and nuisance plants weeds).
Examples of artificial substrates are basket samplers (made of wire cages filled with clean streamside rocks) and multiplate samplers (made of hardboard) for benthic organism collection, and plexiglass strips for periphyton collection.
 See also: Organism, Concentration, Soil, Water, Algae
  
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