Sigrid D. P. Smith
School of Natural Resources and Environment, University of Michigan
Ann Arbor, MI 48109 USA
E-mail: [email protected]

Peter B. McIntyre
Center for Limnology, University of Wisconsin-Madison
Madison, WI 53706 USA

Benjamin S. Halpern
1: Bren School of Environmental Science and Management, University of California
Santa Barbara, CA 93106 USA
2: Imperial College London, Silwood Park Campus, Buckhurst Road
Ascot SL57PY UK
3: National Center for Ecological Analysis and Synthesis, 735 State St. Suite 300
Santa Barbara, CA, 93101 USA

Roger M. Cooke
Resources for the Future
Washington, DC 20036 USA

Adrienne L. Marino
School of Natural Resources and Environment, University of Michigan
Ann Arbor, MI 48109 USA
Present address: University of Michigan Water Center, Graham Sustainability Institute, University of Michigan, Ann Arbor, MI 48109 USA

Gregory L. Boyer
Great Lakes Research Consortium and College of Environmental Science and Forestry, State University of New York
Syracuse, NY 13210 USA

Andy Buchsbaum
Great Lakes Regional Center, National Wildlife Federation
Ann Arbor, MI 48104 USA

G. A. Burton Jr.
School of Natural Resources and Environment, University of Michigan
Ann Arbor, MI 48019 USA

Linda M. Campbell
School of Environmental Studies and Department of Biology, Queen's University, Kingston, Ontario, K7L 3N6 Canada
Present address: Environmental Science Program, St. Mary's University, Halifax, NS B3H-3C3 Canada

Jan J. H. Ciborowski
Department of Biological Sciences, University of Windsor
Windsor, ON N9B-3P4 Canada

Patrick J. Doran
The Nature Conservancy Great Lakes Project
Lansing, MI 48906 USA

Dana M. Infante
Department of Fisheries and Wildlife, Michigan State University
East Lansing, MI 48824 USA

Lucinda B. Johnson
Natural Resources Research Institute, University of Minnesota
Duluth, MN 55881 USA

Jennifer G. Read
School of Natural Resources and Environment, University of Michigan
Ann Arbor, MI 48109 USA
Present address: University of Michigan Water Center, Graham Sustainability Institute, University of Michigan, Ann Arbor, MI 48109 USA

Joan B. Rose
Department of Fisheries and Wildlife, Michigan State University
East Lansing, MI 48824 USA

Edward S. Rutherford
NOAA, Great Lakes Environmental Research Lab
Ann Arbor, MI 48015 USA

Alan D. Steinman
Annis Water Resources Institute, Grand Valley State University
Muskegon, MI 49441 USA

J. David Allan
School of Natural Resources and Environment, University of Michigan
Ann Arbor, MI 48109 USA

gleam_survey_ms_supp1_score_matrix.csv (MD5: fa3b7c9cbf4efb2dd00d27b78e65a138)     Impact ratings (50 stressors x 30 habitats)

This file contains the potential impact of each of 50 environmental stressors on ecosystem condition in the Laurentian Great Lakes. Data were derived from two parts of an online survey completed by scientific researchers, natural resource managers, and non-governmental organization representatives. In one part (Part III of the survey; Appendix A), respondents ranked 20 hypothetical scenarios to derive weights for 5 components of ecosystem impact (spatial extent, temporal frequency, ecological scope, magnitude of change, and recovery time). In the other part (Part IV; Appendix A), respondents rated the 5 components for each stressor in their chosen focal lake(s) and ecosystem zone(s). A weighted sum was used to derive these 0 (no impact) - 5 (highest impact)range relative ratings.

In the data file, columns are environmental stressors (2 capital letters for category, and 3–4 lower case letters for stressor name); rows are habitats (lake–zone combinations). Abbreviations for lakes, zones, and stressors follow.

Lake-zone abbr	Lake	Zone
ls_zwr	Superior	wetlands and rivermouths
ls_zlh	Superior	littoral, hard substrate
ls_zls	Superior	littoral, soft substrate
ls_zsh	Superior	sublittoral, hard substrate
ls_zss	Superior	sublittoral, soft substrate
ls_zo	Superior	offshore
lm_zwr	Michigan	wetlands and rivermouths
lm_zlh	Michigan	littoral, hard substrate
lm_zls	Michigan	littoral, soft substrate
lm_zsh	Michigan	sublittoral, hard substrate
lm_zss	Michigan	sublittoral, soft substrate
lm_zo	Michigan	offshore
lh_zwr	Huron	wetlands and rivermouths
lh_zlh	Huron	littoral, hard substrate
lh_zls	Huron	littoral, soft substrate
lh_zsh	Huron	sublittoral, hard substrate
lh_zss	Huron	sublittoral, soft substrate
lh_zo	Huron	offshore
le_zwr	Erie	wetlands and rivermouths
le_zlh	Erie	littoral, hard substrate
le_zls	Erie	littoral, soft substrate
le_zsh	Erie	sublittoral, hard substrate
le_zss	Erie	sublittoral, soft substrate
le_zo	Erie	offshore
lo_zwr	Ontario	wetlands and rivermouths
lo_zlh	Ontario	littoral, hard substrate
lo_zls	Ontario	littoral, soft substrate
lo_zsh	Ontario	sublittoral, hard substrate
lo_zss	Ontario	sublittoral, soft substrate
lo_zo	Ontario	offshore
Stressor abbr	Stressor category	Stressor name
AQchan	aquatic habitat alterations	channel dredging
AQhyp	aquatic habitat alterations	hypoxia
AQport	aquatic habitat alterations	industrial ports and harbors
AQlite	aquatic habitat alterations	light pollution
AQboat	aquatic habitat alterations	marinas and recreational boating
AQship	aquatic habitat alterations	shipping lanes
AQext	aquatic habitat alterations	shoreline extensions
AQhard	aquatic habitat alterations	shoreline hardening
AQsubm	aquatic habitat alterations	submerged cables and pipelines
AQdflo	aquatic habitat alterations	tributary dams (altered flow, sediment retention)
AQdfis	aquatic habitat alterations	tributary dams (barriers to fish passage)
CCwatl	climate change	changing water levels
CCice	climate change	decreasing ice cover
CCtemp	climate change	warming water temperatures
CDdev	coastal development	coastal development (residential and commercial)
CDmine	coastal development	coastal mining
CDpowr	coastal development	coastal power plants
CDrec	coastal development	coastal recreational use
CDroad	coastal development	coastal road density
FIcult	fisheries management	aquaculture
FIcomm	fisheries management	commercial fishing
FIdip	fisheries management	Diporeia decline
FInats	fisheries management	native fish stocking
FInns	fisheries management	non-native fish stocking
FIrchr	fisheries management	recreational fishing - charter
FIrnch	fisheries management	recreational fishing - non-charter
INblst	invasive and nuisance species	ballast water invasion risk
INfdis	invasive and nuisance species	emerging fish diseases
INhab	invasive and nuisance species	harmful algal blooms
INsubp	invasive and nuisance species	invasive underwater plants
INplkt	invasive and nuisance species	invasive planktonic species
INfish	invasive and nuisance species	invasive fish
INlamp	invasive and nuisance species	invasive sea lamprey
INwetp	invasive and nuisance species	invasive wetland plants
INmus	invasive and nuisance species	invasive zebra and quagga mussels
INbalg	invasive and nuisance species	nuisance benthic algal blooms
NPcso	nonpoint source pollution	combined sewer overflows
NPnlod	nonpoint source pollution	nitrogen loading
NPphar	nonpoint source pollution	pharmaceutical loading
NPplod	nonpoint source pollution	phosphorus loading
NPsed	nonpoint source pollution	sediment loading
TXaoc	toxic chemical pollution	areas of concern
TXemer	toxic chemical pollution	emerging toxic chemicals
TXmetb	toxic chemical pollution	toxic metals - biomagnifying (mercury)
TXmetn	toxic chemical pollution	toxic metals - non-biomagnifying (copper)
TXorgb	toxic chemical pollution	toxic organic chemicals - biomagnifying (PCBs)
TXorgn	toxic chemical pollution	toxic organic chemicals - non-biomagnifying (PAHs)
TXpest	toxic chemical pollution	toxic pesticides
WDlake	water withdrawals and diversions	water withdrawals and diversions (Great Lakes)
WDinld	water withdrawals and diversions	water withdrawals and diversions (inland and groundwater)