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  • 1
    Electronic Resource
    Electronic Resource
    The influence of the frequency of periodic disturbances on the maintenance of phytoplankton diversity (1986)
    Springer
    Oecologia 71 (1986), S. 25-28 
    Details
    ISSN: 1432-1939
    Keywords: Diversity ; Disturbances ; Nutrient pulses ; Population reductions ; Varying frequency and intensity ; Growth strategies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of periodic disturbances of various frequency on the maintenance of the phytoplankton diversity was studied by semicontinuous competition experiments. Disturbances consisted of dilution events, which meant both addition of fresh nutrients and elimination of organisms. The intervals between dilution events varied from 1 to 14 days. Diversity was found to increase with increasing intervals between disturbances. coexisting species belonged to different strategy types: (a) species with rapid growth under enriched conditions, (b) species with good competitive abilities under impoverished conditions, (c) species with the ability to build up storage pools of the limiting nutrient. An increase of the number of coexisting species over the number that would have coexisted in steady state was only found when the interval exceeded one generation time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377315
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrate- and silicate-competition among antarctic phytoplankton (1986)
    Springer
    Marine biology 91 (1986), S. 345-351 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Natural phytoplankton from antarctic waters in the Drake Passage were used for competition experiments in semicontinuous cultures. The outcome of interspecific competition for silicate and nitrate was studied at a range of Si:N ratios (from 2.6:1 to 425:1) and at three different dilution rates. For five species Monod kinetics of silicate-and nitrate-limited growth has been established. Comparison between theoretical predictions derived from Monod kinetics and the outcome of competition experiments showed only minor deviations. Contrary to literature data, considerable depletion of nitrate was found in antarctic seawater. Both the concentrations of soluble silicate and of nitrate were too low to support maximum growth rates of some of the diatom species under investigation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428628
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Hutchinson's heritage: the diversity-disturbance relationship in phytoplankton (1993)
    Springer
    Hydrobiologia 249 (1993), S. 1-7 
    Details
    ISSN: 1573-5117
    Keywords: the paradox of plankton ; Intermediate Disturbance Hypothesis ; diversity ; general ecology ; community changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper introduces a collection of contributions presented at the 8th Workshop of the International Association of Phytoplankton Taxonomy and Ecology. It compares the substance of with what to limnologists is the more familiar ‘paradox of the plankton’ posed by G. E. Hutchinson. The utility of Connell's Intermediate Disturbance Hypothesis in plankton ecology is, potentially, more instructive but inherent difficulties in relating response to stimulus have to be overcome. A copy of the brief distributed to contributors before the workshop is appended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008837
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Intermediate disturbance in the ecology of phytoplankton and the maintenance of species diversity: a synthesis (1993)
    Springer
    Hydrobiologia 249 (1993), S. 183-188 
    Details
    ISSN: 1573-5117
    Keywords: disturbance ; quiescence ; environmental variability ; temporal scales ; diversity ; species richness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper concludes a collection of contributions presented at the 8th Workshop of the International Association of Phytoplankton Taxonomy and Ecology. It derives a consensus as to the virtues and strengths of J. H. Connell's Intermediate Disturbance Hypothesis (IDH), its applicability to phytoplankton ecology and its theoretical and practical weaknesses. The view is expressed that the IDH is too useful a concept to reject and that, as a word model, it provides a powerful link between diversity and disturbance. The more robust investigations that are necessary to consolidate the tenancy of IDH need to concentrate upon the separation and quantification of the stimulus- and response-components of disturbance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008853
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    Paper (German National Licenses)
    Fulltext
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