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  • 1
    Book
    Book
    Intermediate disturbance hypothesis in phytoplankton ecology : proceedings of the 8th workshop of the International Association of Phytoplankton Taxonomy and Ecology held in Baja (Hungary), 5 - 15 July 1991 (1993)
    Dordrecht [u.a.] : Kluwer Academic Publishers
    Details Availability
    Keywords: Phytoplankton Congresses Ecology ; Phytoplankton ; Ökologie ; Konferenzschrift
    In: Hydrobiologia ; 249 (1993)
    Type of Medium: Book
    Pages: X, 199 S , Ill., graph. Darst , 27 cm
    ISBN: 0792320972
    Series Statement: Developments in hydrobiology 81
    URL: http://www.loc.gov/catdir/enhancements/fy0822/92041133-d.html
    URL: http://www.loc.gov/catdir/enhancements/fy0822/92041133-t.html
    URL: http://www.gbv.de/dms/bowker/toc/9780792320975.pdf
    DDC: 589.4
    Language: English
    Note: Literaturangaben
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  • 2
    Electronic Resource
    Electronic Resource
    The first decade of oligotrophication of Lake Constance (1993)
    Springer
    Oecologia 93 (1993), S. 276-284 
    Details
    ISSN: 1432-1939
    Keywords: Phytoplankton ; Recovery from eutrophication ; Species composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In Lake Constance, after several decades of cutrophication, a decrease in phosphorus loading over the last decade has lead to a partial recovery from eutrophication. Here we analyse the shift in the taxonomic composition of phytoplankton during the first decade of oligotrophication in Lake Constance. During the 1980s, spring total P concentrations decreased from ca. 130 to less than 50 μ·l−1. This decrease was reflected by an approximately proportional decrease in summer phytoplankton biomass while spring phytoplankton biomass seemed unresponsive. Major taxonomic changes occured during both growth seasons. In spring, the proportion of diatoms, green algae and Chrysophyta increased while the proportion of Cryptophyta decreased. The summer trend was very different: the relative importance of diatoms decreased and Cryptophyta and Chrysophyta increased, while Chlorophyta reached their peak around 1985. These trends are also analysed at the genus level. Comparison with taxonomic trends during the eutrophication period shows the expected reversals in most cases. Comparison with other lakes shows general similarities, with the notable exception that Planktothrix rubescens has never been important in Lake Constance. The increase of diatoms during spring is attributed to their improved competitive performance with increasing Si:P ratios. Their decrease during summer is explained by the increasing silicate removal from the epilimnion by increasing spring populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317682
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Disturbance-diversity relationships in two lakes of similar nutrient chemistry but contrasting disturbance regimes (1993)
    Springer
    Hydrobiologia 249 (1993), S. 59-65 
    Details
    ISSN: 1573-5117
    Keywords: diversity ; disturbance ; phytoplankton ; carrying capacity ; competitive exclusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Phytoplankton diversity was studied in two North German lakes of comparable nutrient chemistry but different exposure to winds. In both lakes, phytoplankton was primarily N-limited but diatoms were Si-limited. Plußsee had a very constant mixing depth during summer, while week-to-week changes of several meters were quite common in the more exposed Behler See. In Plußsee, phytoplankton biomass during summer came closer to the carrying capacity as defined by the available total N. In Plußsee there was a marked decline of diversity during the summer maximum of biomass, while this decline was less pronounced in Behler See. It is concluded that disturbances which prevented phytoplankton from reaching the carrying capacity also maintained a high level of diversity. A negative response of diversity to undisturbed conditions became apparent, after phytoplankton biomass had exceeded about 5% of the carrying capacity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008843
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  • 4
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    Phytoplankton competition in Plußsee: a field test of the resource-ratio hypothesis (1993)
    ASLO (Association for the Sciences of Limnology and Oceanography)
    In:  Limnology and Oceanography, 38 (4). pp. 838-845.
    Details
    Publication Date: 2018-06-25
    Description: During a 10-month study in Plusssee Si, N, and light were found as potentially limiting resources for phytoplankton growth rates. Therefore, three ratios of essential resources (Si : N, Si : light, N : light) and one ratio of substitutable resources (nitrate: ammonium) were compared to changes in species composition to test the hypothesis that the seasonal change of phytoplankton species composition was a response to changing resource ratios. The relationship was analyzed by a rank correlation analysis between the relative contribution of individual species to total biomass and resource ratios. Allowance was made for time lags between changes in resource ratios and changes in relative biomass. Of 16 species, 14 showed a significant response to at least one resource ratio. Time lags ranged from 0 to 6 weeks. Most species seemed to be favored either by minimal or maximal ratios; optimal ratios in the middle of the range were rare.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.4319/lo.1993.38.4.0838
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  • 5
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    The relationships between resource ratios and phytoplankton composition during the spring period in five North German lakes (1993)
    ASLO (Association for the Sciences of Limnology and Oceanography)
    In:  Limnology and Oceanography, 38 . pp. 846-856.
    Details
    Publication Date: 2019-07-29
    Description: Phytoplankton species composition and the availability of potentially limiting resources were investigatcd in five northern German lakes (Suhrer See, Kellersee, Behler See, PluBsee, and Krummsee) during spring 1988. Species composition was related to resource ratios to test Tilman’s resource-ratio hypothesis. The clearest results were obtained for Aulacoseira spp. Both the time-courses within the lakes and the comparison among the lakes suggest a strong tendency of this genus to become dominant at high Si : light ratios. Fragilariaceae occupied the next position on the Si : light gradient. Such conditions permitted them to become important even when Si : P ratios were quite low. With the onset of stratification diatoms were replaced by flagellates.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.4319/lo.1993.38.4.0846
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  • 6
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    Intermediate disturbance in the ecology of phytoplankton and the maintenance of species diversity: a synthesis (1993)
    Springer
    In:  Hydrobiologia, 249 (1-3). pp. 183-188.
    Details
    Publication Date: 2017-01-30
    Description: 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. Connells Intermediate Disturbance Hypothesis (IDH), its applicability to phytoplank- ton 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 dis- turbance. 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 dis- turbance.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00008853
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  • 7
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    Disturbance-diversity relationships in two lakes of similar nutrient chemistry but contrasting disturbance regimes (1993)
    Springer
    In:  Hydrobiologia, 249 (1-3). pp. 59-65.
    Details
    Publication Date: 2017-01-30
    Description: Phytoplankton diversity was studied in two North German lakes of comparable nutrient chemistry but different exposure to winds. In both lakes, phytoplankton was primarily N-limited but diatoms were Si-limited. Plußsee had a very constant mixing depth during summer, while week-to-week changes of several meters were quite common in the more exposed Behler See. In Plußsee, phytoplankton biomass during summer came closer to the carrying capacity as defined by the available total N. In Plußsee there was a marked decline of diversity during the summer maximum of biomass, while this decline was less pronounced in Behler See. It is concluded that disturbances which prevented phytoplankton from reaching the carrying capacity also maintained a high level of diversity. A negative response of diversity to undisturbed conditions became apparent, after phytoplankton biomass had exceeded about 5% of the carrying capacity.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00008843
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  • 8
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    Hutchinson's heritage: the diversity-disturbance relationship in phytoplankton (1993)
    Springer
    In:  Hydrobiologia, 249 (1-3). pp. 1-7.
    Details
    Publication Date: 2017-01-30
    Description: 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 lsquoparadox of the planktonrsquo 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: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00008837
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  • 9
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    The first decade of oligotrophication of Lake Constance (1993)
    Springer
    In:  Oecologia, 93 (2). pp. 276-284.
    Details
    Publication Date: 2017-10-09
    Description: In Lake Constance, after several decades of cutrophication, a decrease in phosphorus loading over the last decade has lead to a partial recovery from eutrophication. Here we analyse the shift in the taxonomic composition of phytoplankton during the first decade of oligotrophication in Lake Constance. During the 1980s, spring total P concentrations decreased from ca. 130 to less than 50 mgr·l–1. This decrease was reflected by an approximately proportional decrease in summer phytoplankton biomass while spring phytoplankton biomass seemed unresponsive. Major taxonomic changes occured during both growth seasons. In spring, the proportion of diatoms, green algae and Chrysophyta increased while the proportion of Cryptophyta decreased. The summer trend was very different: the relative importance of diatoms decreased and Cryptophyta and Chrysophyta increased, while Chlorophyta reached their peak around 1985. These trends are also analysed at the genus level. Comparison with taxonomic trends during the eutrophication period shows the expected reversals in most cases. Comparison with other lakes shows general similarities, with the notable exception that Planktothrix rubescens has never been important in Lake Constance. The increase of diatoms during spring is attributed to their improved competitive performance with increasing Si:P ratios. Their decrease during summer is explained by the increasing silicate removal from the epilimnion by increasing spring populations.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00317682
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  • 10
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    The scientific management of eutrophication management. reconciling basic physiology and empirical biomass models (1993)
    In:  Memorie dell'Istituto Italiano di Idrobiologia, 52 . 89-111A.
    Details
    Publication Date: 2018-09-26
    Type: Article , NonPeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - without review
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