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  • 1
    Publication Date: 1973-03-01
    Print ISSN: 1438-387X
    Electronic ISSN: 1438-3888
    Topics: Biology
    Published by BioMed Central
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Helgoland marine research 24 (1973), S. 78-81 
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. Rates of net photosynthesis and respiration were determined in situ forTridacna and coral species and their contained zooxanthellae at depths from 9 to 18 m. 2. Integrated daily total net photosynthesis to respiration ratios (P/R ratio) were calculated from these data to obtain the potential contribution of algal photosynthesis to the energy budget of the coral-algal symbiotic association. 3. The integrated daily P/R ratios varied between 0.79 and .89. Maximum ratios of photosynthesis to respiration rates ranged from 1.15 forMussa arrgulosa to 2.91 forManicina areolata. 4. Similar measurements were made on mixed benthic communities off southeastern Florida (USA) in a clean, unpolluted area and in an area influenced by the effluent of Biscayne Bay (USA). Very significant differences were found.
    Notes: Kurzfassung Im Rahmen mehrerer amerikanischer Unterwasser-Forschungsprogramme wurden Stoffwechseluntersuchungen in verschiedenen Korallenriffen an Benthostieren durchgeführt, die in symbiotischer Partnerschaft mit Zooxanthellen leben. An Korallen- undTridacna-Arten wurden in situ die Beziehungen zwischen Nettophotosynthese und Sauerstoffverbrauch (P/R-Verhältnis) gemessen. Als Maximalwert wurde beiManicina areolata ein P/R-Verhältnis von 2,9 ermittelt. Die auf einen Zeitraum von 24 Stunden bezogenen Durchschnittswerte lagen zwischen 0,79 und 0,89. Es wurde festgestellt, daß die photosynthetische Aktivität der Korallen in verunreinigten Riffgebieten stark absinkt.
    Type of Medium: Electronic Resource
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