Science Inventory

A CALCIUM-BASED INVASION RISK ASSESSMENT FOR ZEBRA AND QUAGGA MUSSELS (DREISSENA SPP.)

Citation:

WHITTIER, T. R., P. L. RINGOLD, A. T. HERLIHY, AND S. PIERSON. A CALCIUM-BASED INVASION RISK ASSESSMENT FOR ZEBRA AND QUAGGA MUSSELS (DREISSENA SPP.). FRONTIERS IN ECOLOGY AND THE ENVIRONMENT. Ecological Society of America, Ithaca, NY, 6(4):180-184, (2008).

Impact/Purpose:

We used calcium concentration data from over 3000 stream and river sites across the contiguous United States to classify ecoregions relative to their risk for Dreissena species invasion.

Description:

We used calcium concentration data from over 3000 stream and river sites across the contiguous United States to classify ecoregions relative to their risk for Dreissena species invasion. We defined risk based on calcium concentrations as: very low (< 12 mg L−1), low (12–20 mg L−1), moderate (20–28 mg L−1), and high (> 28 mg L−1). Ecoregions comprising 9.4% and 11.3% of land area were classified as very low risk and low risk, respectively. These areas included New England, most of the southeast, and western portions of the Pacific Northwest. High-risk ecoregions comprised 58.9% of land area. Ecoregions with highly variable calcium concentrations comprised 19.8% of land area; none could be classified as moderate risk. The majority of Dreissena occurrences (excluding the Great Lakes) were located in high-risk ecoregions, and most exceptions occurred in highly variable ecoregions. In low-risk ecoregions, mussels occurred in large rivers flowing from high-calcium regions. Our map provides guidance for the allocation of management resources.

URLs/Downloads:

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 05/01/2008
Record Last Revised: 01/26/2009
OMB Category: Other
Record ID: 170826

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY

WESTERN ECOLOGY DIVISION

FRESHWATER ECOLOGY BRANCH