Abstract
In virtually all measurements of phytoplankton productivity, the environment sampled is typical of the bulk or homogeneous water column and not reflective of localized discontinuities which exist in situ. This is particularly true in hypertrophic environments. Establishment of microenvironmental regions adjacent to actively growing microbial cells are shown in this study to impose significant growth rate constraints which are not suggested by bulk water sampling and ambient nutrient level.
Establishment of microlayers surrounding phytoplankton cells is shown as a function of fluid shear, rates of uptake, excretion and applicable chemical interconversion reactions. An analysis of basic aspects of molecular diffusion is presented for simple diffusion, diffusion of interactive ionic species and enzyme mediated transport.
Comparison of growth responses of competing algal organisms is presented. It appears that the blue-green alga Anabaena flos-aquae is less sensitive by a factor of three to decreases in fluid shear than is Selenastrum capricornutum. Evidence is presented for the role of microlayer establishment and associated enzyme transport systems as important factors in the initiation and reinforcement of blue-green algal blooms.
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© 1980 Dr. W. Junk b.v. Publishers-The Hague, The Netherlands
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Olofsson, J.A. (1980). The Role of Microlayers in Controlling Phytoplankton Productivity. In: Barica, J., Mur, L.R. (eds) Hypertrophic Ecosystems. Developments in Hydrobiology, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9203-0_10
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DOI: https://doi.org/10.1007/978-94-009-9203-0_10
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