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Ecoregion / Biocriteria Publications

June 2011


CODE:
PUBLICATIONS:

GR-1-13
Griffith, G.E., J.M. Omernik, C.B. Johnson, and D.S. Turner. In review. Ecoregions of Arizona (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Menlo Park, CA, Scale 1:1,325,000.

GR-2-13
Griffith, G.E., J.M. Omernik, , D.W. Smith, T.D. Cook, E. Tallyn, Moseley, K. and C.B. Johnson. In prep. Ecoregions of California (2 sided color poster with map, descriptive text, and photographs). U.S. Geological Survey, Menlo Park, CA, (map scale 1:1,100,000).

GR-1-11
Wiken, E., F. Jiménez Nava, and G. Griffith. 2011. North American Terrestrial Ecoregions—Level III. Commission for Environmental Cooperation, Montreal, Canada. 149p.

OM-1-11
Omernik, J.M., R.M. Hughes, G.E. Griffith, and G.M. Hellyer. 2011. Common geographic frameworks. In: Landscape and predictive tools: a guide to spatial analysis for environmental assessment. EPA/100/R-11/002. U.S. Environmental Protection Agency, Risk Assessment Forum, Washington, D.C. pp. 5-1 - 5-46

BR-1-10
Bryce, S.A., G.E. Griffith, J.M. Omernik, G. Edinger, S. Indrick, O. Vargas, and D. Carlson. 2010. Ecoregions of New York (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,250,000.

GR-1-09
Griffith, G.E., J.M. Omernik, S.A. Bryce, J. Royte, W.D. Hoar, J.W. Homer, D. Keirstead, K.J. Metzler, and G. Hellyer. 2009. Ecoregions of New England (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,325,000.

BR-1-08
Bryce, S.A., G.A. Lomnicky, P.R. Kaufmann, L.S. McAllister and T.L. Ernst. 2008. Development of biologically based sediment criteria in mountain streams of the western United States. North American Journal of Fisheries Management 28:1714-1724.

GR-1-07
Griffith, G.E., S.B. Bryce, J.M. Omernik, and A. Rogers. 2007. Ecoregions of Texas. Texas Commission on Environmental Quality. Austin, TX. 125p.

WO-1-07
Woods, A.J., J.M. Omernik, and B.C Moran. 2007. Level III and IV Ecoregions of New Jersey. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Western Ecology Division, Corvallis, Oregon. 19p.

BR-1-06
Bryce, S.A. 2006. Development of a bird integrity index: Measuring avian response to disturbance in the Blue Mountains of Oregon, USA. Environmental Management 38(3):470-486.

CH-1-06
Chapman, S.S., G.E. Griffith, J.M. Omernik, A.B. Price, J. Freeouf, and D.L. Schrupp. 2006. Ecoregions of Colorado. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,200,000.

DA-1-06
Daigle, J.J., G.E. Griffith, J.M. Omernik, P.L. Faulkner, R.P. McCulloh, L.R. Handley, L.M. Smith, and S.S. Chapman. 2006. Ecoregions of Louisiana. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,000,000.

GR-1-06
Griffith, G.E., J.M. Omernik, M.M. McGraw, G.Z. Jacobi, C.M. Canavan, T.S. Schrader, D. Mercer, R. Hill, and B.C. Moran. 2006. Ecoregions of New Mexico (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,400,000.

ST-1-06
Stoddard, J.L., D.P. Larsen, C.P. Hawkins, R.K. Johnson, and R.H. Norris. 2006. Setting expectations for the ecological condition of streams: the concept of reference condition. Ecological Applications 16(4):1267-1276.

WO-1-06
Woods, A.J., J.M. Omernik, C.L. Pederson, and B.C Moran. 2006. Level III and IV Ecoregions of Illinois. Corvallis, Oregon, U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Western Ecology Division, U.S. EPA Report, EPA/600/R-06/104, 45 p.

WO-1-05
Woods, A.J., J.M. Omernik, D.R. Butler, J.G. Ford, J.E. Henley, B.W. Hoagland, D.S. Arndt, and B.C. Moran. 2005. Ecoregions of Oklahoma. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,250,000.

CH-1-04
Chapman, S.S., G.E. Griffith, J.M. Omernik, J.A. Comstock, M.C. Beiser, and D. Johnson. 2004. Ecoregions of Mississippi. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,000,000.

CH-2-04
Chapman, S.S., B.A. Kleiss, J.M. Omernik, T.L. Foti, and E.O. Murray. 2004. Ecoregions of the Mississippi Alluvial Plain. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,150,000.

CH-3-04
Chapman, S.S., S.A. Bryce, J.M. Omernik, D.G. Despain, J. ZumBerge, and M. Conrad. 2004. Ecoregions of Wyoming. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,400,000.

GA-1-04
Gallant, A.L., T.R. Loveland, T.L. Sohl, and D.E. Napton. 2004. Using an ecoregion framework to analyze landcover and land-use dynamics. Environmental Management 34(Supplement 1):s89-s110.

GR-1-04
Griffith, G.E., S.A. Bryce, J.M. Omernik, J.A. Comstock, A.C. Rogers, B. Harrison, S.L. Hatch, and D. Bezanson. 2004. Ecoregions of Texas. (2 sided color poster with map, descriptive text, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:2,500,000.

OM-1-04
Omernik, J.M. 2004. Perspectives on the nature and definition of ecological regions. Environmental Management 34(Supplement 1):s27-s38.

ST-1-04
Stoddard, J.L. 2004. Use of ecological regions in aquatic assessments of ecological condition. Environmental Management 34(Supplement 1):s61-s70.

WO-1-04
Woods, A.J., T.L. Foti, Chapman, S.S., J.M. Omernik, J. Wise, E.O. Murray, W.L. Prior, J. Pagan, J.A. Comstock, and M. Radford. 2004. Ecoregions of Arkansas. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,000,000.

BR-1-03
Bryce, S.A., A.J. Woods, J.D. Morefield, J.M. Omernik, T.R. McKay, G.K. Brackley, R.K. Hall, D.K. Higgins, D.C. McMorran, K.E. Vargas, E.B. Petersen, D.C. Zamudio, and J.A. Comstock. 2003. Ecoregions of Nevada. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,350,000.

OM-1-03
Omernik, J.M. 2003. The misuse of hydrologic unit maps for extrapolation, reporting, and ecosystem management. Journal of the American Water Resources Association 39(3): 563-573.

SH-1-03
Shirazi, M.A., C.B. Johnson, J.M. Omernik, D. White, P.K. Haggerty, and G.E. Griffith. 2003. Quantitative soil descriptions for ecoregions of the United States. Journal of Environmental Quality 32:550-561.

TH-1-03
Thorson, T.D., S.A. Bryce, D.A. Lammers, A.J. Woods, J.M. Omernik, J. Kagan, D.E. Pater, and J.A. Comstock. 2003. Ecoregions of Oregon. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000.

BR-1-02
Bryce, S.A., R.M. Hughes, and P.R. Kaufmann. 2002. Development of a bird integrity index: using bird assemblages as indicators of riparian condition. Environmental Management 30(2):294-310.

CH-1-02
Chapman, S.S., J.M. Omernik, G.E. Griffith, W.A. Schroeder, T.A. Nigh, and T.F. Wilton. 2002. Ecoregions of Iowa and Missouri. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,800,000.

GR-1-02
Griffith, G.E., J.M. Omernik, J.A. Comstock, M.P. Shafale, W.H. McNab, D.R. Lenat, J.B. Glover, and V.B. Shelburne. 2002. Ecoregions of North Carolina and South Carolina. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000.

GR-2-02
Griffith, G., J. Omernik, and J. Comstock. 2002. Ecoregions of South Carolina. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 47p.

GR-3-02
Griffith, G., J. Omernik, and J. Comstock. 2002. Ecoregions of North Carolina. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 54p.

MC-1-02
McGrath, C.L., A.J. Woods, J.M. Omernik, S.A. Bryce, M. Edmondson, J.A. Nesser, J. Shelden, R.C. Crawford, J.A. Comstock, and M.D. Plocher. 2002. Ecoregions of Idaho. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,350,000.

RO-1-02
Rohm, C.M., J.M. Omernik, A.J. Woods, and J.L. Stoddard. 2002. Regional characteristics of nutrient concentrations in streams and their application to nutrient criteria development. Journal of the American Water Resources Association 38(1):1-27

WO-1-02
Woods, A.J., J.M. Omernik, W.H. Martin, G.J. Pond, W.M. Andrews, S.M. Call, J.A. Comstock, and D.D. Taylor. 2002. Ecoregions of Kentucky. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,000,000.

CH-1-01
Chapman, S.S., J.M. Omernik, J.A. Freeouf, D.G. Huggins, J.R. McCauley, C.C. Freeman, G. Steinauer, R.T. Angelo, and R.L. Schlepp. 2001. Ecoregions of Nebraska and Kansas. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,950,000.

GR-1-01
Griffith, G.E., J.M. Omernik, J.A. Comstock, S. Lawrence, G. Martin, A. Goddard, V.J. Hulcher, and T. Foster. 2001. Ecoregions of Alabama and Georgia. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,700,000.

GR-2-01
Griffith, G., J. Omernik, T. Foster, and J. Comstock. 2001. Ecoregions of Georgia. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 48p.

MM-1-01
McMahon, G., S.M. Gregonis, S.W. Waltman, J.M. Omernik, T.D. Thorson, J.A. Freeouf, A.H. Rorick, and J.E. Keys. 2001. Developing a spatial framework of common ecological regions for the conterminous United States. Environmental Management 28(3):293-316.

W0-1-01
Woods, A.J., D.A. Lammers, S.A. Bryce, J.M. Omernik, R.L. Denton, M. Domeier, and J.A. Comstock. 2001. Ecoregions of Utah. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,175,000.

OM-1-00
Omernik, J.M., S.S. Chapman, R.A. Lillie, and R.T. Dumke. 2000. Ecoregions of Wisconsin. Transactions of the Wisconsin Academy of Science, Arts and Letters 88(2000):77-103.

BR-1-99
Bryce, S.A., D.P. Larsen, R.M. Hughes, and P.R. Kaufmann. 1999. Assessing relative risks to aquatic ecosystems: a mid-Appalachian case study. Journal of the American Water Resources Association 35(1):23-36.

BR-2-99
Bryce, S.A., J.M. Omernik, and D.P. Larsen. 1999. Ecoregions: a geographic framework to guide risk characterization and ecosystem management. Environmental Practice 1(3):141-155.

GR-1-99
Griffith, G.E., J.M. Omernik, and A.J. Woods. 1999. Ecoregions, watersheds, basins, and HUCs: How state and federal agencies frame water quality. Journal of Soil and Water Conservation 54(4):666-677.

WO-1-99
Woods, A.J., J.M. Omernik, J.A. Nesser, J. Shelden, and S.H. Azevedo. 1999. Ecoregions of Montana. (2 sided, 2 sheet color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000.

BR-1-98
Bryce, S.A., J.M. Omernik, D.E. Pater, M. Ulmer, J. Schaar, J. Freeouf, R. Johnson, P. Kuck, and S.H. Azevedo. 1998. Ecoregions of North Dakota and South Dakota. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000.

GR-1-98
Griffith, G.E., J.M. Omernik, and S.H. Azevedo. 1998. Ecoregions of Tennessee. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:940,000.

PA-1-98
Pater, D.E., S.A. Bryce, T.D. Thorson, J. Kagan, C. Chappell, J.M. Omernik, S.H. Azevedo, and A. J. Woods. 1998. Ecoregions of Western Washington and Oregon (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,350,000.

WO-1-98
Woods, A.J., J.M. Omernik, C.S. Brockman, T.D. Gerber, W.D. Hosteter, and S.H. Azevedo. 1998. Ecoregions of Indiana and Ohio (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:500,000.

CE-1-97
Commission for Environmental Cooperation. 1997. Ecological regions of North America: toward a common perspective. Commission for Environmental Cooperation, Montreal, Quebec, Canada. 71pp.

CL-1-97
Clarke, S.E. and S.A. Bryce. 1997. Hierarchical subdivisions of the Columbia Plateau & Blue Mountains ecoregions, Oregon & Washington. General Technical Report PNW-GTR-395. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR. 114p.

GR-1-97
Griffith, G. E., J. M. Omernik, and S. H. Azevedo. 1997. Ecoregions of Tennessee. EPA/600/R-97/022. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 51p.

GR-2-97
Griffith, G.E., D.E. Canfield, Jr., C.A. Horsburgh, J.M. Omernik. 1997. Lake Regions of Florida. EPA/R-97/127. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 89p.

OM-1-97
Omernik, J.M. and R.G. Bailey 1997. Distinguishing between watersheds and ecoregions. Journal of the American Water Resources Association 33(5):1-15.

BA-1-96
Barbour, M.T., J. Gerritsen, G.E. Griffith, R. Frydenborg, E. McCarron, J.S. White, and M.L. Bastian. 1996. A framework for biological criteria for Florida streams using benthic macroinvertebrates. Journal of the North American Benthological Society 15(2):185-211.

BR-1-96
Bryce, S. A. and S. E. Clarke. 1996. Landscape-level ecological regions: linking state-level ecoregion frameworks with stream habitat classifications. Environmental Management 20(3):297-311.

WO-1-96
Woods, A.J., J.M. Omernik, D.D. Brown, and C.W. Kiilsgaard. 1996. Level III and IV ecoregions of Pennsylvania and the Blue Ridge Mountains, the Ridge and Valley, and Central Appalachians of Virginia, West Virginia, and Maryland. EPA/600/R-96/077. U.S. EPA National Health and Environmental Effects Research Laboratory, Corvallis, OR. 50p.

WO-2-96
Woods, A.J. and J.M. Omernik. 1996. Ecoregions of Pennsylvania. The Pennsylvania Geographer 34(2):2-37.

GA-1-95
Gallant, A.L., E.F. Binnian, J.M. Omernik, and M.B. Shasby. 1995. Ecoregions of Alaska. U.S. Geological Survey Professional Paper 1567. U.S. Government Printing Office, Washington D.C.

HU-1-95
Hughes, R. M. 1995. Defining acceptable biological status by comparing with reference conditions. In: Biological Assessment and Criteria: Tools for Water Resource Planning and Decision Making, W. David and T.P. Simon (eds.). Lewis Publishing, Boca Raton, FL. pp. 31-47.

LI-1-95
Li, H.W., K. Currens, D. Bottom, S. Clarke, J. Dambacher, C. Frissell, P. Harris, R.M. Hughes, D. McCullough, A. McGie, K. Moore, R. Nawa, S. Thiele. 1995. Safe havens: refuges and evolutionarily significant units. American Fisheries Society Symposium 17:371-380.

OM-1-95
Omernik, J.M. 1995. Ecoregions: a spatial framework for environmental management. In: Biological Assessment and Criteria: Tools for Water Resource Planning and Decision Making, W. Davis and T.P. Simon (eds.). Lewis Publishing, Boca Raton, FL. pp.. 49-62.

OM-2-95
Omernik, J. M. 1995. Ecoregions: a framework for managing ecosystems. The George Wright Forum 12(1):35-50.

PE-1-95
Peterson, S.A., R.M. Hughes, D.P. Larsen, S.G. Paulsen, and J.M. Omernik. 1995. Regional lake quality patterns: Their relationship to lake conservation and management decisions. Lakes and Reservoirs: Research and Management 1:163-167.

RO-1-95
Rohm, C.M., J.M. Omernik and C.W. Kiilsgaard. 1995. Regional patterns of total phosphorus in lakes of the northeastern United States. Lake and Reservoir Management 11(1):1-14 (color map).

GR-1-94
Griffith, G.E., J.M. Omernik, S.M. Pierson, and C.W. Kiilsgaard. 1994. Massachusetts ecological regions project. EPA/600/A-94/111. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 58p.

GR-2-94
Griffith, G.E., J.M. Omernik, T.F. Wilton, and S.M. Pierson. 1994. Ecoregions and subregions of Iowa: a framework for water quality assessment and management. The Journal of the Iowa Academy of Science 101(1):5-13.

GR-3-94
Griffith, G.E., J.M. Omernik, C.M. Rohm, and S.M. Pierson. 1994. Florida regionalization project. EPA/600/Q-95/002. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 83p.

HU-1-94
Hughes, R.M. S.A. Heiskary, W.J. Matthews, and C.O. Yoder. 1994. Use of ecoregions in biological monitoring. In: Biological Monitoring of Aquatic Systems. S.L. Loeb and A. Spacie(eds.). Lewis Publishers, Boca Raton, FL. pp.125-151.

HU-1-93
Hughes, R.M. 1993. Stream indicator and design workshop. EPA/60/R-93/138. U.S. EPA, Environmental Research Laboratory, Corvallis, OR.

HU-2-93
Hughes, R.M., C.B. Johnson, S.S. Dixit, A.T. Herlihy, P.R. Kaufmann, W.L. Kinney, D.P. Larsen, P. Lewis, D.M. McMullen, A. Moors, R.J. O'Connor, S.G. Paulsen, R.S. Stemberger, S.A. Thiele, T.R. Whittier, and D. Kugler. 1993. Development of lake condition indicator for EMAP--1991 lake pilot. pp. 7-90. In: EMAP-Surface Waters 1991. Pilot Report. EPA/620/r-93/003. U.S. EPA, Environmental Research Laboratory, Corvallis, OR.

TH-1-93
Thiele, S.A. and J.M. Omernik. 1993. Subregions of the Columbia Plateau ecoregion. U.S. EPA Environmental Research Laboratory, Corvallis, OR. 19p.

HU-1-92
Hughes, R.M. and R.F. Noss. 1992. Biological diversity and biological integrity: current concerns for lakes and streams. Fisheries 7(3):11-19.

HU-2-92
Hughes, R.M, T.R. Whittier, S.A. Thiele, J.E. Pollard, D.V. Peck, S.G. Paulsen, D. McMullen, J. Lazorchak, D.P. Larsen, W.L. Kinney, P.R. Kaufmann, S. Hedtke, S.S. Dixit, G.B. Collins, and J.B. Baker. 1991. Lake and stream indicators for U. S. EPA's Environmental Monitoring and Assessment Program. pp. 305-336. In: Ecological Indicators. D. McKenzie, ed. Elsevier. Barking, England.

OB-1-92
Oberdorff, T., and R.M. Hughes. 1992. Modification of an index of biotic integrity based on fish assemblage to characterize rivers in the Seine Basin, France. Hydrobiologia 228:117-130.

TH-1-92
Thiele, S.A., C.W. Kiilsgaard, and J.M. Omernik. 1992. The subdivision of the Coast Range ecoregion of Oregon and Washington. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 13p.

CL-1-91
Clarke, S.E., D. White, and A.L. Schaedel. 1991. Oregon, USA, ecological regions and subregions for water quality management. Environmental Management 15(6):847-856.

GR-1-91
Griffith, G. E., and J. M. Omernik. 1991. Alabama/Mississippi Project. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 27P.

OM-1-91
Omernik, J.M., C.M. Rohm, R.A. Lillie, and N. Mesner. 1991. The usefulness of natural regions for lake management: an analysis of variation among lakes in northwestern Wisconsin, U. S. A. Environmental Management 15(2):281-293.

OM-2-91
Omernik, J.M. and G.E. Griffith. 1991. Ecological regions vs. hydrologic units: frameworks for managing water quality. Journal of Soil and Water Conservation 46(5):334-340.

US-1-91
U. S. Environmental Protection Agency Science Advisory Board. 1991. Evaluation of the ecoregion concept. Report of the Ecoregions Subcommittee of the Ecological Processes and Effects Committee. EPA-SAB-EPEC-91-003, Washington, DC. 25p.

GA-1-90
Gallant, A L., J.M. Omernik, and R.M. Hughes. 1990. Ecoregions of the Seine River basin, France. A status report. Map. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 10p.

HU-1-90
Hughes, R.M., T.R. Whittier, C.M. Rohm, and D.P. Larsen. 1990. A regional framework for establishing recovery criteria. Environmental Management 14(5):673-683.

OM-1-90
Omernik, J.M. and A.L. Gallant. 1990. Defining regions for evaluating environmental resources. In: Proceedings of the Global Natural Resource Monitoring and Assessment Symposium, Preparing for the 21st. Century; Venice, Italy, September 24-30, 1989. pp.936-947.

US-1-90
U. S. Environmental Protection Agency, Office of Water. 1990. Ohio EPA's use of biological survey information. Monitoring and Data Support Division Report. Washington, DC. 4p.

GA-1-89
Gallant, A.L., T.R. Whittier, D.P. Larsen, J.M. Omernik, and R.M. Hughes. 1989. Regionalization as a tool for managing environmental resources. EPA/600/3-89/060. U.S. EPA, Environmental Research Laboratory, Corvallis, OR, 152p.

HE-1-89
Heiskary, S.A.and B.C. Wilson. 1989. The regional nature of lake quality across Minnesota: an analysis for improving resource management. Journal of the Minnesota Academy of Science 55(1):71-77.

HU-1-89
Hughes, R.M. 1989. What can biological monitoring tell us about the environmental health of aquatic ecosystems? In: Proceedings of an International Symposium; Design of Water Quality Information Systems. R.C. Ward, J.C Loftis and G.B. McBride (eds.). Fort Collins, CO. pp. 447-460.

HU-2-89
Hughes, R.M. 1989. Ecoregional biological criteria. In: Proceedings of an EPA Conference, Water Quality Standards for the 21st Century, Dallas, TX. 4p.

HU-3-89
Hughes, R.M. 1989. The IBI: A quantitative, easily communicated assessment of the health and complexity of entire fish communities. In: Proceedings of the Southeast Stream Ecology Workshop, October 4-5, 1988. U.S. Fish and Wildlife Service Biological Report 90(5):26-28.

PL-1-89
Plafkin, J.L., M.T. Barbour, K.D. Porter, S.K. Gross, R. M. Hughes. 1989. Rapid Bioassessment Protocols for Use in Streams and Rivers: Benthic Macroinvertebrates and Fish. U.S. EPA, Assessment and Watershed Protection Division, Washington D.C., EPA/444/4-89-001. May 1989.

OM-1-89
Omernik, J.M. and A.L. Gallant. 1989. Aggregations of Ecoregions of the Conterminous United States. Map. U.S. EPA, Environmental Research Laboratory, Corvallis, OR.

BO-1-88
Bond, C.E., E. Rexstad, and R.M. Hughes. 1988. Habitat preferences of twenty-five common species of Oregon freshwater fishes. Northwest Science 62(5):223-232.

BR-1-88
Brooks, R.P. and R.M. Hughes. 1988. Guidelines for assessing the biotic communities of freshwater wetlands. In: Proceedings of the National Wetland Symposium: Mitigation of Impacts and Losses. Association of State Wetland Managers, October 1986, New Orleans, LA. pp 276-282.

HE-1-88
Heiskary, S.A. and W.W. Walker, Jr. 1988. Developing phosphorus criteria for Minnesota lakes. Lake and Reservoir Management 4(1):1-9.

HU-1-88
Hughes, R.M. and D.P. Larsen. 1988. Ecoregions: an approach to surface water protection. Journal of the Water Pollution Control Federation 60:486-493.

LA-1-88
Larsen, D.P., D.R. Dudley, and R.M. Hughes. 1988. A regional approach to assess attainable water quality: An Ohio case study. Journal of Soil and Water Conservation 43:171-176.

MI-1-88
Miller, D.L., et. al. 1988. Regional applications of an index of biotic integrity for use in water resource management. Fisheries 13:12-20.

OM-1-88
Omernik, J.M. and A.L. Gallant. 1988. Ecoregions of the Upper Midwest States. EPA/600/3-88/037. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 56p.

OM-2-88
Omernik, J.M., C.M. Rohm, S.E. Clarke, and D.P. Larsen. 1988. Summer total phosphorus in lakes: A map of Minnesota, Wisconsin, and Michigan, U.S.A. Environmental Management 12(6):815-825.

US-1-88
U.S. Environmental Protection Agency, Office of Water. 1988. Water Quality Program Highlights: Minnesota's nonpoint source assessment program. Monitoring and Data Support Division Report, Washington, DC. 2p.

WH-1-88
Whittier, T.R. 1988. Report of the national workshop on instream biological monitoring and criteria. U.S. Environmental Protection Agency. Office of Water Regulations and Standards. Washington, DC. 33p.

WH-2-88
Whittier, T.R., R.M. Hughes, and D.P. Larsen. 1988. Correspondence between ecoregions and spatial patterns in stream ecosystems in Oregon. Canadian Journal of Fisheries and Aquatic Sciences 45:1264-1278.

HE-1-87
Heiskary, S.A., B.C. Wilson, and D.P. Larsen. 1987. Analysis of regional patterns in lake water quality: using ecoregions for lake management in Minnesota. Lake and Reservoir Management 3:337-344.

HU-1-87
Hughes, R.M., E. Rexstad, and C.E. Bond. 1987. The relationship of aquatic ecoregions, river basins, and physiographic provinces to the ichthyogeographic regions of Oregon. Copeia 2:423-432.

HU-2-87
Hughes, R. M. and J. R. Gammon. 1987. Longitudinal changes in fish assemblages and water quality in the Willamette River, Oregon. Transactions of the American Fisheries Society 116:196-209.

OM-1-87
Omernik, J.M. 1987. Ecoregions of the conterminous United States. Annals of the Association of American Geographers 77:118-125.

OM-2-87
Omernik, J.M. 1987. Ecoregions of the Northeast States. Map (scale 1:2,500,000). EPA/600/D-87/313. Environmental Protection Agency, Environmental Research Laboratory, Corvallis, OR.

OM-3-87
Omernik, J.M. and A.L. Gallant. 1987. Ecoregions of the Southwest States. Map (scale 1:2,500,000. EPA/600/D-87/316. U.S. EPA, Environmental Research Laboratory, Corvallis,OR

OM-4-87
Omernik, J.M. and A.L. Gallant. 1987. Ecoregions of the West Central States. Map (scale 1:2,500,000). EPA/600/D-87/317. U.S. EPA, Environmental Research Laboratory, Corvallis, OR.

RO-1-87
Rohm, C.M., J.W. Giese, and C.C. Bennett. 1987. Evaluation of an aquatic ecoregion classification of streams in Arkansas. Journal of Freshwater Ecology 4(1): 127-140.

WH-1-87
Whittier, T.R., D.P. Larsen, R.M. Hughes, C.M. Rohm, A.L. Gallant, and J.M. Omernik. 1987. The Ohio stream regionalization project: a compendium of results. EPA/600/3/-87/025. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 66p.

HU-1-86
Hughes, R.M., D.P. Larsen, and J.M. Omernik. 1986. Regional reference sites: A method for assessing stream potentials. Environmental Management 10:629-635.

LA-1-86
Larsen, D.P., R.M. Hughes, J.M. Omernik, D.R. Dudley, C.M. Rohm, T.R. Whittier, A.J. Kinney, and A.L. Gallant. 1986. Correspondence between spatial patterns in fish assemblages in Ohio streams and aquatic ecoregions. Environmental Management 10:815-828.

OM-1-86
Omernik, J.M. and A.L. Gallant. 1986. Ecoregions of the Pacific Northwest. EPA/600/3-86/033. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 39 p.

OM-2-86
Omernik, J.M. and G.E. Griffith. 1986. Total alkalinity of surface waters: A map of the western region. Journal of Soil and Water Conservation 41(6):374-378.

OM-3-86
Omernik, J.M. and G.E. Griffith. 1986. Total alkalinity of surface waters: Map of the Upper Midwest region of the United States. Environmental Management 10(6):829-839.

US-1-86
U.S. Environmental Protection Agency, Office of Water. 1986. Water Quality Program Highlights: Arkansas' Ecoregion Program Monitoring and Data Support Division Report. Washington, D.C. 2p.

WH-1-86
Whittier T.R., and D.L. Miller. 1986. Stream fish communities revisited: Case of mistaken identity. The American Naturalist 128(3):433-437.

HU-1-85
Hughes, R.M. 1985. Use of watershed characteristics to select control streams for estimating effects of metal mining wastes on extensively disturbed streams. Environmental Management 9:253-262.

HU-1-83
Hughes, R.M. and J.M. Omernik. 1983. An alternative for characterizing stream size. In: Dynamics of Lotic Ecosystems, Ch. 5. T.D.Fontaine, III and S.M. Bartell (eds.). Ann Arbor Science, Ann Arbor, MI. pp. 87-101.

HU-1-82
Hughes, R.M., J.H. Gakstatter, M.A. Shirazi, and J.M. Omernik. 1982. An approach for determining biological integrity in flowing waters. In: In-Place Resource Inventories: Principles and Practices, Proceedings of a National Workshop, August 9-14, 1981, Orono, Maine. T.B. Brann, L.O. House, and H.G. Lund, (eds.). Society of American Foresters, Bethesda, MD. pp. 877-888.

OM-1-82
Omernik, J.M., M.A. Shirazi, and R.M. Hughes. 1982. A synoptic approach for regionalizing aquatic ecosystems. In: In-Place Resource Inventories: Principles and Practices, Proceedings of a National Workshop, August 9-14, 1981, Orono, Maine. T.B. Brann, L.O. House, and H.G. Lund, (eds.). Society of American Foresters, Bethesda, MD.. pp. 199-218.

HU-1-81
Hughes, R.M. and J.M. Omernik. 1981. Use and misuse of the terms watershed and stream order. American Fisheries Society, Warmwater Stream Symposium, Bethesda, MD. pp. 320-326

OM-1-81
Omernik, J.M., M.A. Shirazi, and R.M. Hughes. 1981. A synoptic approach for regionalizing aquatic ecosystems. Paper presented at the Inplace Resource Inventory: Principles & Practices, A National Workshop. University of Maine, Orono, ME, August 9-14, 1981. pp. 199-218.

OM-2-81
Omernik, J.M., A R. Abernathy, and L.M. Male. 1981. Stream nutrient levels and proximity of agricultural and forest land to streams: some relationships. Journal of Soil and Water Conservation 36(4):227-231.

OM-1-77
Omernik, J.M. 1977. Nonpoint Source Stream Nutrient Level Relationships: A Nationwide Study. EPA/600/3-77/105. U.S. EPA, Environmental Research Laboratory, Corvallis, OR. 151p. Map scale 1:7,500,000.






FILE MAPS:

M-1 Level III Ecoregions of the Continental United States (Revised 2005)

M-CEC1 Level I Ecological Regions of North America

M-CEC2 Level II Ecological Regions of North America

M-CEC3 Level III Ecological Regions of North America




Many of the ecoregion maps, publications, and GIS files are available at http://www.epa.gov/wed/pages/ecoregions.htm


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