Here we combine new and published measurements of pigmentation composition and inherent optical properties from pure cultures of several algal and cyanobacterial groups, together with environmental spectroscopy data, to identify the pigments generating the optical signals captured by two established algorithms. globosa are synchronous with those of the diatom Pseudo-nitzschia delicatissima, another harmful bloom-forming species with similar pigmentation and optical signature. However, recent experimental evidence suggests that the interpretation of the optical signal and its exclusive association with P. In the last two decades, methods have been developed for the optical detection and quantification of these blooms, with potential applications for autonomous in situ or remote observations. At high biomass concentration, these are considered harmful algal blooms due to their deleterious impact on the local ecosystems and economy, and are considered an indicator for eutrophication. Phaeocystis globosa is a nuisance haptophyte species that forms annual blooms in the southern North Sea and other coastal waters. 4Flanders Marine Institute, Oostende, Belgium.
3National Research Council of Italy, Institute of Marine Sciences, Rome, Italy.2Department of Marine Science, University of Connecticut, Groton, CT, United States.1Protistology and Aquatic Ecology, Ghent University, Ghent, Belgium.Alexandre Castagna 1 *, Heidi Dierssen 2, Emanuele Organelli 3, Margarita Bogorad 1, Jonas Mortelmans 4, Wim Vyverman 1 and Koen Sabbe 1
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