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The article discusses a study of the dynamics of soluble extracellular polymeric substances (S-EPS) and transparent exopolymer particle (TEP) pools in coastal ecosystems. In particular, time series of S-EPS and TEP fractions were studied in natural phytoplankton assemblages at the Bay des Veys and Lingreville-sur Mer, two macrotidal sites in the English Channel. The link between TEP production and phytoplankton and nutrient dynamics in spring and summer is suggested. Also noted is the impact of hydrodynamic forcings on TEP concentration variations in autumn and winter. It concludes that the origins of TEP and S-EPS are different as indicated by the different production patterns.

The article discusses the hydroacoustic resolution of small-scale vertical distribution in Baltic cod Gadus morhua in stratified marine ecosystems with dynamic features in salinity, temperature and oxygen concentration to select suitable living conditions. The study aims to present a method to resolve small-scale distribution on an individual level for the behavior-based predicting of habitat choice of vertical thermohaline and oxygen stratification. It resolves the clear influence limitation of cod during the spawning time of echotaking to analyze individual behavior and implications for the population's spatial distribution.