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Clam Bed (Biotic Group)

Component: Biotic

Unique Identifier: 524

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Soft Sediment Fauna
Biotic Group Clam Bed
Biotic Community Arctica Bed
Donax Bed
Macoma Bed
Mercenaria Bed
Mulinia Bed
Mya Bed
Nucula Bed
Rangia Bed
Spisula Bed
Venus Bed
Yoldia Bed

Definition Areas where either: (a) living clams, siphons, or siphon holes are the dominant surface feature, or; (b) clams dominate the faunal biomass. Siphons or shells may (or may not) be visible from above the sediment surface. The Clam Bed biotic group includes clams of all sizes; clam size can be specified using the Invertebrate Community Organism Size Modifiers: Meiofauna (dominants < 0.5 millimeter), Small Macrofauna (dominants > 0.5 millimeter to 2 millimeters), Large Macrofauna (dominants > 2 millimeters to 1 centimeter), Megafauna (dominants > 1 centimeter to 3 centimeters), Large Megafauna (dominants > 3 centimeters), with all measurements in the smallest dimension (e.g., the smallest shell width for most clams).