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Particle aggregation during a diatom bloom. 1. Physical aspects
Riebesell, U. (1991). Particle aggregation during a diatom bloom. 1. Physical aspects. Mar. Ecol. Prog. Ser. 69(3): 273-280
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630, more
Peer reviewed article  

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Keywords
    Algal blooms; Biogenic material; Organic matter; Organism aggregations; Physical properties; Bacillariophyceae [WoRMS]; ANE, North Sea [Marine Regions]; Marine

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  • Riebesell, U.

Abstract
    Aggregate size and abundance were monitored in situ at a fixed station in the southern North Sea during a 6 wk investigation which covered the phytoplankton spring bloom and the pre- and post-bloom periods. Particle aggregates were abundant during the entire period of study. Biologically derived material, such as algal cells, played a central role in aggregate formation. Maximum total aggregate volume coincided with the peak of the bloom. Maximum aggregate size did not correlate with either phytoplankton biomass or total suspended matter. Despite a distinct increase in the amount of aggregated material during the development of the bloom, maximum aggregate size remained at about 1 mm diameter during most of the investigation. The formation of large, marine-snow-sized aggregates up to 5 cm in longest dimension, which was restricted to a short period following the decline of the phytoplankton bloom, coincided with comparatively low shear rates.

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