The phytoplankton in coastal regions are responding to constant environmental changes, thus the use of proxies derived from situ frequent time-series observations and validated traditional microscopic or pigment methods can be a solution for detecting rapid responses community dynamics succession. In this study, we combined high-frequency (every 30 min May September 2017) optical hydrographic d...

It is shown that the dormancy of predators induces mixed-mode oscillations and chaos in the population dynamics of a prey-predator system under certain conditions. The mixed-mode oscillations and chaos are shown to bifurcate from a coexisting equilibrium by means of the theory of fast-slow systems. These results may help to find experimental conditions under which one can demonstrate chaotic po...

The biogeochemistry of waters is an essential regulator phytoplankton dynamics, determining the level species bloom and change in dominants. This paper investigated seasonal dynamics nutrient concentrations their ratios northeastern Black Sea 2017–2021. Two taxonomic groups, diatoms coccolithophores, determine significantly contribute to total biomass. Coccolithophores formed blooms early June ...

Efforts this year focused on testing our model of the effects of episodic increases in current shear on the dynamics and impacts of thin layers of phytoplankton and zooplankton. Thin layers are plankton patches that range in thickness from a few tens of centimeters to a few meters, yet can be sufficiently intense to affect biological rate processes and the performance of current and planned Nav...

The crown-of-thorns starfish, Acanthaster planci, is a predator of corals that is a major management issue on coral reefs [1]. It occurs throughout the Indo–Pacific and shows boom–bust population dynamics with low background densities and intermittent outbreaks. Three waves of population outbreaks have affected Australia’s Great Barrier Reef (GBR) since the 1960s. The waves of outbreaks appear ...