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Attached Fauna (Biotic Subclass)

Component: Biotic

Unique Identifier: 425

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Attached Fauna
Biotic Group Attached Anemones
Barnacles
Attached Bryozoans
Attached Corals
Attached Crinoids
Diverse Colonizers
Attached Hydroids
Attached Mussels
Attached Oysters
Attached Sponges
Attached Tunicates
Vent/Seep Communities
Mineral Boring Fauna
Wood Boring Fauna
Attached Basket Stars
Attached Brachiopods
Brittle Stars on Hard or Mixed Substrates
Mobile Crustaceans on Hard or Mixed Substrates
Mobile Mollusks on Hard or Mixed Substrates
Sessile Gastropods
Attached Holothurians
Attached Starfish
Attached Sea Urchins
Attached Tube-Building Fauna
Chitons


Description
Definition Areas characterized by rock substrates, gravel substrates, other hard substrates, or mixed substrates that are dominated by fauna which maintain contact with the substrate surface, including firmly attached, crawling, resting, interstitial, or clinging fauna. Fauna may be found on, between, or under rocks or other hard substrates or substrate mixes. These fauna use pedal discs, cement, byssal threads, feet, claws, appendages, spines, suction, negative density, or other means to stay in contact with the (generally) hard substrate, and may or may not be capable of slow movement over the substrate. However, these fauna are not able to achieve speeds sufficient to move beyond the unit boundary within one day. Many attached fauna are suspension feeders and feed from the water column. Other attached fauna are benthic feeders, including herbivores, predators, detritivores, and omnivores. Within Attached Fauna, the Biotic Group is identified as the biota making up the greatest percent cover on the hard attachment surface within the classified area. Biota present at lesser percent cover values within the classified area may be identified as Co-occurring Elements (See Section 10.6.2) or (if not a CMECS Biotic Group) Associated Taxa (See Section 10.3.1).