Several marine and freshwater diatoms produce polyunsaturated aldehydes (PUA) in wound-activated processes. These metabolites are also released by intact diatom cells during algal blooms. Due to their activity in laboratory experiments, PUA are considered as potential mediators of diatom-bacteria interactions. Here, we tested the hypothesis that PUA mediate such processes in a close-to-field me...

We examined the influence of macronutrient (nitrate and phosphate) additions on Ni uptake by phytoplankton (Prorocentrum donghaiense and Skeletonema costatum) and its subsequent transfer to marine copepods (Calanus sinicus and Labidocera euchaeta). Ni uptake by phytoplankton after 24h of exposure was markedly dependent on nutrient conditions, with a higher nutrient quota facilitating Ni accumul...

A taxonomic study of diatoms was carried out in a tropical coastal lagoon. Material for this study consists of water samples obtained from February-March 1992 to November-December 2000. Qualitative and quantitative analyses showed the presence of 373 taxa of which the families Bacillariaceae (67 species) and Chaetocerotaceae (37 species) were the most abundant groups. The species Skeletonema co...

Undisturbed records of resting stages produced in the past and stored in coastal sediments are very valuable to science, because they may provide unique insights into past evolutionary and ecological trajectories. Within marine phytoplankton, multidecadal time series of monoclonal strains germinated from resting stages have been established for diatoms (Skeletonema marinoi) and dinoflagellates ...

antimicrobial activity of different culture extract of oudemansiella sp grown on liquid medium (mygp) were tested. different fungi (c. albicans, c. lipolytica, saccharomyces cervisiea, cladosporium herbarum, and aspergillus niger) and bacteria (microccocus luteus, e. coli, staphylococcus aureus, and staphylococcus epidermidis) were used as test organisms. various antimicrobial assay methods inc...

Changes in nutrient concentrations can be caused by anthropogenic activities coastal and marine waters. This affects the abundance of phytoplankton. The waters experiencing it are Kassikebo Pangkep, South Sulawesi, Indonesia. For this reason, research has been carried out to analyze structure phytoplankton communities these waters, from January July 2022. To identify phytoplankton, 100 L seawat...