Modalities and Trends of Variability of Plankton Concentrations Recorded During a Digital Holographic Experiment In Situ

The measurements of plankton concentration performed on various-scale registration systems are quite different from each other. This work shows that these differences are caused by the spatiotemporal structure of plankton biocenosis, as well as the features of data processing methods that take into account the scale of measurements of the corresponding methods and registration tools. Hence, this leads to the modality and periodicity of the measured plankton concentration time series, whose parameters are consistent with environmental factors. Such modality and periodicity are studied in this work by analyzing the data obtained through a natural digital holographic experiment. The paper suggests the metrics of modality and periodicity of digital holographic data characterizing their informational value. It also shows the role of the segmentation of monitoring time series at the bioindication station. The proposed approach makes it possible to link the time scales of observations with the spatial scales of the studied plankton groups. Thus, we are able to determine the spatiotemporal frameworks of bioindication estimates, reasonably plan the measurement experiments, and correctly compare the data obtained using different tools.