Abstract
The error inin vivo 14C incubator measurements of primary production in the Eastern Scheldt when neutral density filters were used and the error obtained when no account was taken of the spectral changes in submarine irradiance that occur with increasing depth, were evaluated theoretically. By multiplying the photosynthetic action spectra of two marine algae by calculated irradiance in the euphotic layer using Kd and Kd(λ) respectively, the gross primary production P[Ed(400–700)] and P[Ed(λ)] was computed. In the green-brown waters of the Eastern Scheldt estuary the use of neutral density filters was sufficient to simulate the underwater light conditions. In clear waters it can cause an overestimation of the gross production.
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Stronkhorst, J. The influence of the spectral composition of irradiance on primary production in the Eastern Scheldt (The Netherlands). Hydrobiological Bulletin 22, 127–134 (1988). https://doi.org/10.1007/BF02256816
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DOI: https://doi.org/10.1007/BF02256816