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  • 1
    Electronic Resource
    Electronic Resource
    In situ measurements of net primary production in a Colorado mountain stream (1979)
    Springer
    Hydrobiologia 66 (1979), S. 227-235 
    Details
    ISSN: 1573-5117
    Keywords: primary productivity ; mountain stream productivity ; stream metabolism ; stream heterotrophy-autotrophy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Six stations were established on a Colorado mountain stream, and net primary productivity was measured in situ during all seasons. For 24-hour periods the dissolved oxygen and temperature of the water were electronically monitored over an undisturbed 1 x 1 m section of rubble bottom enclosed by a large plastic dome tightly fitted to the substrate. A submerged pump maintained a current within the dome, and the whole apparatus was submerged below the stream level. The bottom community net metabolism varied between heterotrophy and autotrophy with no correlations with altitude, season, light, water chemistry, and temperature. Readings were all very low and ranged from -27.38 to 35.59 grams of carbon fixed per square meter per year. There were no correlations between biomass of the bottom fauna and net community productivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020904
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fresh-water invertebrates of the United States (1955)
    Springer
    Hydrobiologia 7 (1955), S. 126-126 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189804
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Toward a classification of lotic habitats (1971)
    Springer
    Hydrobiologia 38 (1971), S. 321-334 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A world-wide system for classifying brooks, streams, and small rivers is proposed, using the following criteria: width, flow, current speed, substrate, summer temperatures, winter temperatures, turbidity, total dissolved organic matter, total dissolved inorganic matter, water hardness, dissolved oxygen, rooted aquatic plants, streamside vegetation. Some of these criteria have much greater biological implications than others. It is contended that widely separated lotic habitats that are similar in the above features have biotas consisting of ecologically similar and parallel clusters of species. There are, nevertheless, many kinds of “atypical” polluted and unpolluted lotic habitats that cannot be classified with respect to these criteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036842
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    An experimental study of oxygen absorption in some damselfly naiadsContribution no. 7, Limnological Laboratory, Biology Department, University of Colorado. (1944)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 23 (1944), S. 1-10 
    Details
    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1030230102
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    Paper (German National Licenses)
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