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Effects of phosphorus loading on interactions of algae and bacteria: reinvestigation of the 'phytoplankton–bacteria paradox' in a continuous cultivation system

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    SYSNO ASEP0025990
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleEffects of phosphorus loading on interactions of algae and bacteria: reinvestigation of the 'phytoplankton–bacteria paradox' in a continuous cultivation system
    TitleVlivy různého zatížení fosforem na interakce řas a bakterií: přezkoumání “paradoxu fytoplankton–bakterie” v systému kontinuální kultivace
    Author(s) Mindl, B. (AT)
    Sonntag, B. (AT)
    Pernthaler, J. (DE)
    Vrba, Jaroslav (HBU-Z)
    Psenner, R. (AT)
    Posch, T. (AT)
    Source TitleAquatic Microbial Ecology. - : Inter-Research - ISSN 0948-3055
    Roč. 38, č. 3 (2005), s. 203-213
    Number of pages11 s.
    ActionASLO Summer Meeting
    Event date19.06.2005-24.06.2005
    VEvent locationSantiago de Compostela
    CountryES - Spain
    Event typeWRD
    Languageeng - English
    CountryDE - Germany
    Keywordsalgae–bacteria interaction ; Cryptomonas phaseolus ; phosphorus
    Subject RIVEH - Ecology, Behaviour
    CEZAV0Z6017912 - HBU-Z, BC-A
    AnnotationThe effect of different phosphorus loads (LP) on the phosphorus (P) and carbon (C) content of algae and bacteria was assessed in continuous culture. We tested if a mixed microbial assemblage co-cultured with Cryptomonas phaseolus would comply with the ‘phytoplankton–bacteria paradox’. At the level of a mixed microbial assemblage it is characterised by the following aspects: (1) bacteria profit from their high affinity to P and are better competitors at lower LP; (2) although algae compete with bacteria for P, P-limited algae release extracellular C that stimulates growth of their bacterial competitors; (3) when bacteria depend on algae as their sole source of organic C, this provides a feedback mechanism by which algae limit the abundance of their competitors at higher LP; (4) large oscillations in the bacteria–algae ratios at the lowest LP point to a greater instability of this interaction with stronger P competition.
    WorkplaceInstitute of Hydrobiology (until 2005)
    ContactVáclava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889
    Year of Publishing2006
Number of the records: 1  

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