DISTINGUISHING BETWEEN WATERSHEDS AND ECOREGIONS 1

: In an effort to adopt more holistic ecosystem approaches to resource assessment and management, many state and federal agencies have begun using watershed or ecoregion frameworks. Although few would question the need to make this move from dealing with problems and issues on a case by case or point-type basis to broader regional contexts, misunderstanding of each of the frameworks has resulted in inconsistency in their use and ultimate effectiveness. The focus of this paper is on the clarification of both frameworks. We stress that the issue is not whether to use watersheds (or basins or hydrologic units) or ecoregions for needs such as developing ecosystem management and non-point source pollution strategies or structuring water quality regulatory programs, but how to correctly use the frameworks together. Definitions, uses, and misuses of each of the frameworks are discussed as well as ways watersheds and ecoregions can be and have been used together effectively to meet resource management needs.

[1]  J. Lyons.  Correspondence Between the Distribution of Fish Assemblages in Wisconsin Streams and Omernik's Ecoregions , 1989 .

[2]  J. Giese,et al.  Evaluation of an Aquatic Ecoregion Classification of Streams in Arkansas , 1987 .

[3]  Robert G. Bailey,et al.  Ecosystem Geography , 1996, Springer New York.

[4]  Gene E. Likens,et al.  Humans as components of ecosystems : the ecology of subtle human effects and populated areas , 1993 .

[5]  S. Mather,et al.  UNITED STATES DEPARTMENT OF THE INTERIOR , 1997 .

[6]  J. J. Parsons.  ON “BIOREGIONALISM”AND “WATERSHED CONSCIOUSNESS”∗ , 1985 .

[7]  N. LeRoy Poff,et al.  Implications of Streamflow Variability and Predictability for Lotic Community Structure: A Regional Analysis of Streamflow Patterns , 1989 .

[8]  F. P. Kapinos,et al.  Hydrologic unit maps , 1987 .

[9]  R. Bailey.  Design of Ecological Networks for Monitoring Global Change , 1991, Environmental Conservation.

[10]  James J. Kay,et al.  ------------------------------------------------------------------------Embracing Complexity : The Challenge of the Ecosystem Approach , 1994 .

[11]  David P. Larsen,et al.  Regional reference sites: a method for assessing stream potentials , 1986 .

[12]  Total Alkalinity of Surface Waters—A National Map , 1983 .

[13]  Robert G. Bailey,et al.  Testing and ecosystem regionalization , 1984 .

[14]  J. Allan,et al.  Functional Organization of Stream Fish Assemblages in Relation to Hydrological Variability , 1995 .

[15]  J. R. Maxwell,et al.  A hierarchical framework of aquatic ecological units in North America , 1995 .

[16]  A. Fitzsimmons.  Sound policy or smoke and mirrors : Does ecosystem management make sense ? , 1996 .

[17]  J. Omernik,et al.  Correspondence between spatial patterns in fish assemblages in ohio streams and aquatic ecoregions , 1986 .

[18]  R. Hughes,et al.  Correspondence Between Ecoregions and Spatial Patterns in Stream Ecosystems in Oregon , 1988 .

[19]  J. Omernik,et al.  Regional Patterns of Total Phosphorus in Lakes of the Northeastern United States , 1995 .

[20]  Steward T. A. Pickett,et al.  Humans as Components of Ecosystems , 1993, Springer New York.

[21]  J. Omernik,et al.  Stream nutrient levels and proximity of agricultural and forest land to streams: Some relationships , 1981 .

[22]  M. Beattie.  An Ecosystem Approach to Fish and Wildlife Conservation , 1996 .

[23]  Jerry F. Franklin,et al.  Contributions of the Long-Term Ecological Research Program , 1990 .

[24]  P. Maitland.  Restoration of aquatic ecosystems: Science, technology, and public policy , 1993 .

[25]  J. Omernik.  Nonpoint source -- stream nutrient level relationships: a nationwide study , 1977 .

[26]  Summer total phosphorus in lakes: A map of Minnesota, Wisconsin, and Michigan, USA , 1988 .

[27]  R. E. Grumbine.  What Is Ecosystem Management , 1994 .

[28]  J. Karr.  Biological Integrity: A Long-Neglected Aspect of Water Resource Management. , 1991, Ecological applications : a publication of the Ecological Society of America.

[29]  W. Langbein,et al.  Water facts for the nation's future : uses and benefits of hydrologic data programs , 1959 .

[30]  Gordon E. Grant,et al.  WATERSHED ANALYSIS AS A FRAMEWORK FOR IMPLEMENTING ECOSYSTEM MANAGEMENT , 1995 .

[31]  S. Rowe.  Home Place: Essays on Ecology , 1990 .

[32]  J. Omernik,et al.  Ecological regions versus hydrologic units: Frameworks for managing water quality , 1991 .

[33]  R. Hughes,et al.  A regional approach for assessing attainable surface water quality: An Ohio case study , 1988 .

[34]  Jerry F. Franklin,et al.  Perspectives on Ecosystem Management , 1996 .

[35]  William C. Sonzogni,et al.  Integrated environmental management: strengthening the conceptualization , 1995 .

[36]  F. B. Lotspeich,et al.  Watersheds as the Basic Ecosystem: this Conceptual Framework Provides a Basis for a Natural Classification System , 1980 .

[37]  J. Biesecker,et al.  Water quality of hydrologic bench marks; an indicator of water quality in the natural environment , 1974 .

[38]  J. W. Thomas,et al.  Forest ecosystem management : an ecological, economic, and social assessment. Report of the forest ecosystem management assessment team , 1993 .

[39]  Derek Armitage,et al.  An integrative methodological framework for sustainable environmental planning and management , 1995 .

[40]  N. Benson.  A Century of fisheries in North America , 1971 .

[41]  R. Hughes,et al.  The relationship of aquatic ecoregions, river basins and physiographic provinces to the ichthyogeographic regions of Oregon , 1987 .