EPA Science Inventory

Status of the amphipod Diporeia ssp. in coastal waters of the Laurentian Great Lakes

Citation:

Scharold, J., W. Bartsch, AND T. Corry. Status of the amphipod Diporeia ssp. in coastal waters of the Laurentian Great Lakes. Association for Sciences of Limnology and Oceanography, Santa Fe, NM, June 05 - 10, 2016.

Description:

Diporeia has historically been the dominant benthic macroinvertebrate in deeper waters of the Laurentian Great Lakes, and its abundance has been proposed as an indicator of ecological condition. In 2010, the USEPA incorporated the Great Lakes into the National Coastal Condition Assessment, a probability-based survey of US coastal waters. The Great Lakes survey comprised US nearshore waters (<30 m depth and within 5 km from shore) and included bays as a distinct class. Benthic macroinvertebrates were collected at 311 sites distributed across all five lakes. Diporeia was found only in Lake Superior, consistent with population declines in the lower Great Lakes over the last two decades. In Lake Superior, Diporeia was present at 43 of 73 sampled sites, with a weighted mean density of 454 + 80 (SE) m-2. Density in bays (120 + 34 m-2) was lower than in the nearshore zone (485 + 91 m-2). Analysis of relationships between Diporeia density and associated environmental parameters will facilitate its use as an indicator of ecological condition for the shallow nearshore zone of Lake Superior.

Purpose/Objective:

not applicable

Record Details:

Record Type: DOCUMENT (PRESENTATION/POSTER)
Completion Date: 06/10/2016
Record Last Revised: 06/20/2016
Record Created: 06/20/2016
Record Released: 06/20/2016
OMB Category: Other
Record ID: 319585

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

MID-CONTINENT ECOLOGY DIVISION