EPA Science Inventory

Early Detection Monitoring Approaches for Non-indigenous Species in Vulnerable Great Lakes Coastal Ecosystems

Citation:

TREBITZ, A. S., J. R. KELLY, J. HOFFMAN, G. S. PETERSON, AND C. W. WEST. Early Detection Monitoring Approaches for Non-indigenous Species in Vulnerable Great Lakes Coastal Ecosystems . Presented at International Conference on Great Lakes Research (IAGLR), Duluth, MN, May 30 - June 04, 2011.

Description:

Great Lakes harbors/embayments are vulnerable to introductions of non-indigenous species (NIS). Early detection of new NIS is desirable to allow for a timely management response, raising the question of how to accomplish this in a consistent, cost-effective manner. To that end, we conducted intensive sampling of fish and benthic macroinvertebrates in the Duluth/Superior harbor. This water body is subject to heavy propagule pressure, and our sampling detected a variety of both old and new NIS (e.g., rainbow smelt, tubenose goby, quagga mussel, New Zealand mud snail). Our deliberately oversampled data set provides the basis with which to evaluate strategies. Analyses confirm that early detection using traditional sampling techniques is inherently inefficient; improved detection probability comes at significant sampling cost. Detection probability varied substantially across species depending on abundance, spatial distribution, habitat use, and gear vulnerability. Species acquisition curves and composition patterns differed among sampling designs and gears/habitats, as did the perception of invasion "status." Since the identity, introduction point, and habitat preference of the next NIS cannot be known, monitoring should cover a diversity of taxa and locations. Our analyses suggest that efficient strategies would bias benthos sampling towards shallow vegetated over deep/bare habitats and bias fish sampling towards fyke and electrofish over trawl samples. Other Great Lakes case studies are being planned, with the ultimate goal of defining monitoring designs for a broad detection network.

Purpose/Objective:

We conducted intensive sampling of fish and benthic macroinvertebrates in the Duluth/Superior harbor, to accomplish early detection of new non-indigenous species and to allow for a timely management response.

URLs/Downloads:

5452TREBITZ.PDF   (PDF,NA pp, 22 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PRESENTATION/ABSTRACT)
Start Date: 05/30/2011
Completion Date: 05/30/2011
Record Last Revised: 11/29/2012
Record Created: 02/16/2011
Record Released: 02/16/2011
OMB Category: Other
Record ID: 233331

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

MID-CONTINENT ECOLOGY DIVISION

ECOSYSTEM ASSESSMENT RESEARCH