Diatoms in Oland, Sweden

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A by-product of our research was phenological information. Hensen , Apstein , and Driver found relatively high Ceratium abundances still in February and March which were remnants of the preceding autumn bloom. The historical spring blooms in Kiel Bay started later in March than is currently the case now frequently in February , reaching peaks only in May. Thus, the historical spring period may have ranged from March to May whereas spring in the Belt Sea has more recently begun in February and ended in April.

However, recent monitoring data have revealed a sudden decrease, especially between and The decrease in the proportion of diatoms and the increase in that of dinoflagellates may have consequences for the food web. Summarizing the phenological results, we may conclude at least from Kiel Bay that the spring bloom period shifted from March-May in the early twentieth century to February-April in recent times. NW collected the historical data from literature and recent data from contributions of co-authors to the related paper Wasmund et al.

The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. My colleague Jan Donath produced Figure 1. Table S1. Compilation of historical phytoplankton data from the Baltic Sea.

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The references, given in the last column and numbered from 1 to 23, relate to the numbering in Figure 1. The combined data from each spring season and sea area are shown in separate lines. Abshagen, G.

Öland by the sea

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Annual cycles of nutrients in a shallow inshore area, Kiel Bight. Ophelia 26, 91— Brandes, C.

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    Catalog Record: Freshwater diatoms in Sri Lanka (Ceylon) | HathiTrust Digital Library

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