Distribution of the Amphipod Diporeia in Lake Superior: The Ring of Fire

► Elevated Diporeia densities occur at sites with depths of 30-125 m in Lake Superior ► This habitat, termed the Ring of Fire, occurs as a band around the lake ► The Ring of Fire, covering only 1/4 of the bottom area, hosts 2/3 of the Diporeia ► The Ring of Fire, covering only 1/4 of the bottom area, hosts 2/3 of the Diporeia ► Forms in depositional environments proximate to a source of primary production ► Significant habitat overlap with the upper food web occurs in the Ring of Fire