Dammed Rivers of the World: Symposium Rationale

  • Jack A. Stanford
  • James V. Ward


H. B. N. Hynes (1970, 1975) has eloquently established stream ecology as a fundamental subdiscipline of limnology. In general terms he describes a river as an expression of the valley through which it flows; production of carbon in lotic habitats is greatly influenced by input of allochthonous nutrients and detritus from the drainage basin. The degree of heterotrophy and/or autotrophy in stream communities is a function of this allochthonous input and the extent of canopy development, which influences the amount of solar energy reaching primary producer biomass in the water. A natural river system may be conceptually perceived as an ecological continuum in which the P/R ratio (i.e., the relationship between community production and respiration) changes from much less than unity in heavily canopied reaches of small headwater tributaries to slightly greater than unity in the slow, meandering areas of the river near its mouth. This idea is being developed in collaborative, holistic studies in very different geographical areas for the purpose of defining more satisfactory methods of quantifying ecological processes and providing ultimate comparative data on lotic ecosystems (Cummins, 1975; this volume).


Leaf Pack River Ecology Lotic Ecosystem Lotic Environment Lotic Habitat 


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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • Jack A. Stanford
    • 1
    • 2
  • James V. Ward
    • 1
    • 2
  1. 1.Department of Biological SciencesNorth Texas State UniversityDentonUSA
  2. 2.Department of Zoology and EntomologyColorado State UniversityFort CollinsUSA

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