The Bay of Quinte, a Z-shaped embayment at the northeastern end of Lake Ontario, has a long history of eutrophication problems primarily manifested as spatially extensive algal blooms and predominance of toxic cyanobacteria. The purpose of this study was to identify the structural changes of the phytoplankton community induced by two environmental alterations: point-source phosphorus (P) loadin...

Biofilm formation by the pathogen Listeria monocytogenes is a major concern in food industries. The aim of this work was to elucidate the effect of nutrient limitation on both biofilm architecture and on the viability of the bacteria in microfluidic growth conditions. Biofilm formation by two L. monocytogenes strains was performed in a rich medium (BHI) and in a 10-fold diluted BHI (BHI/10) at ...

Helcom scenario modelling suggests that the Baltic Sea, one of the largest brackish-water bodies in the world, could expect increased precipitation (decreased salinity) and increased concentration of atmospheric CO2 over the next 100 years. These changes are expected to affect the microplanktonic food web, and thereby nutrient and carbon cycling, in a complex and possibly synergistic manner. In...

Phytoplankton stoichiometry and cell size could result from both phenology environmental change. Zooplankton graze on primary producers, this drives the balance of ecosystem biogeochemical cycles. In study, we performed incubations with copepods coccolithophores including different prey sizes particulate carbon contents by considering phytoplankton biovolume concentration instead chlorophyll a ...

The aim of this study was to evaluate the possibility using simple screening methods determine zooplankton biomass in ponds. Among applicable methods, we selected sedimentation determination wet and dry determination. Of 369 samples analysed, median volumetric 0.012 ml.l-1 weight 0.44 mg.l-1. There a relatively close relationship between determination, allowing only one these be used. Due varia...

light is never being distributed homogeneously and it forms a gradient over biomass. the unidirectional nature of light gives rise to a vertical gradient of light intensity as a function of depth. the maximum depth of the light zone suitable for phytoplankton photosynthesis is designated as the euphotic depth. this study was designed to test the hypothesis of mixing depth of phytoplankton and i...