In situ primary production, biomass and light regime in the Wolderwijd, the most stableOscillatoria agardhiilake in The Netherlands

✍ Scribed by C. Berger

• Book ID: 104616658
• Publisher: Springer
• Year: 1989
• Tongue: English
• Weight: 744 KB
• Volume: 185
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00036611

✦ Synopsis

During the entire period of research from 1971 to 1982 Oscillatoria agardhii Gomont was overwhelmingly present in the Wolderwijd . Six years of measurements of primary production has pointed out that the gross production per day firstly is related to temperature and secondly to irradiation . However, the production per year is neither related to temperature nor to irradiation . In a cold summer gross production is as high as in a warm summer due to higher production in the lower part of the euphotic zone .

In the discussion attention is focused on production characteristics and light climate in relation to the morphometry of the lake . Up to an average depth of 2 .5 m blooming of O . agardhii occurs easily, whilst light saturated production achieves its maximum between 2 .0 and 2 .5 m depth . Increasing depth leads to photo-inhibition in the upper layers followed by lowering of light saturated production . Only special circumstances such as days with microstratification allow growth, resulting then in a monoculture of the alga .