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<br />proposed functional classification of macroinvertebrates should include <br /> <br />indicator and keystone species; (13) a substrate index shoudl be used as long <br /> <br />.. <br /> <br />as it does not obscure the primary data; and (14) the present IFG Incremental <br /> <br />Methodology should be modified to incorporate variables of stream biology and <br /> <br />~ <br /> <br />the state of the stream ecosystems as criteria for fish habitat, <br /> <br />To meet the need for understanding relationships between stream flow and <br /> <br /> <br />recreation, the work by Anas, et al" 19791 on behavioral demand assessment <br /> <br />was referenced by the instream recreation module. Key concepts extracted from <br /> <br />the work includes: (1) recreation behavior is complex, voluntary, and <br /> <br />discretionary, which suggests that it may be quite sensitive in sometimes <br />unexpected ways to environmental change; (2) response of recreationists to <br /> <br />stream flow may vary by activity and by market segment; (3) some impacts may <br /> <br />be more important than others depending upon the market setments and <br /> <br />phychological outcomes affected; (4) impact on psychological outcomes may <br /> <br />occur without obvious changes in manifest behavior; and (5) the <br /> <br />state-of-the-art of explaining relationships between environmental conditions <br /> <br />and recreation behavior and benefit is primitive, While hydraulic measurement <br /> <br />and simulation may be well developed in terms of proven theories and standard <br /> <br />methods and measures, this is not so for prediction of recreation behavior. <br /> <br />The workshop raised several questions and criticism of the incremental <br /> <br />methodology. . The criticisms are: (1) the attempt to assess the impact of <br /> <br />hydraulic characteristics of stream flow on certain instream recreation <br /> <br />activities is, at present, too narrow in scope; (2) the methodology has been <br />inadequate in examining the structur of recreation, i.e., the likelihood that <br /> <br />. <br /> <br />..J <br /> <br />1 / See reference of Module IV--The Relationships Between Recreatioh and <br />Instream Flow of this report. <br /> <br />21 <br />