Kinne, O.; Aurich, H. (Ed.) (1967). Vorträge und Diskussionen. Erstes Europäisches Symposion über Meeresbiologie = Papers and discussions. First European Symposium on Marine Biology = Rapports et discussions. Premier symposium européen sur biologie marine. European Marine Biology Symposia, 1. Helgoländer Wissenschaftliche Meeresuntersuchungen, 15(1-4). 669 pp., more
Communities based on seaweeds are characterized by considerable fluctuations of several hydrographical factors, richness of plant and animal species, and great amounts of biomass. In the present paper, biomass values of algal populations are compared with those of communities from other regions in the sea. Because of the prevailing plant component, seaweed communities differ in their average chemical composition from the zoocoenoses of other regions. The densest populations of seaweeds are developed in temperate and cold seas in small depths of the mediolittoral and sublittoral zones. Since these populations show the highest mean values of biomass per surface unit, it is concluded that these concentrations of organic substance are of the greatest importance for studies concerned with the bioproductivity of the sea.
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