Siliceous Rhizaria (polycystine radiolarians and phaeodarians) are significant contributors to carbon silicon biogeochemical cycles. Considering their broad taxonomic diversity wide size range (from a few micrometres up several millimetres), comprehensive evaluation of the entire community cycles is challenging. Here, we assess contribution silicified global biogenic silica stocks in upper 500 ...

Abstract The increasing use of image-based observing systems in marine ecosystems allows for more quantitative analysis the ecological zonation zooplankton. Developing methods that take advantage these can provide an increasingly nuanced understanding how morphometric characteristics (especially size) are related to distribution, abundance and ecosystem function via a wider application allometr...

Toxic cyanobacterial blooms generate negative environmental, economic and health impacts. We carried out an analysis of historical limnological data (1989-2020, n = 423) we performed a nutrient enrichment experiment to study the cyanobacteria Río Negro, largest internal river Uruguay. defined four hazard levels exposure toxic based on quantitative indicators (biovolume abundance cells visual ob...

Lakes and ponds are dominant components of Arctic landscapes provide food water for northern communities. In the Greiner Lake watershed, in Cambridge Bay (Nunavut, Canada), bodies small (84% <5 ha) shallow (99% <4 m deep). Such characteristics make them vulnerable to eutrophication as temperatures rise nutrient concentrations from greening landscape increase. Here, we investigated compare...

The progress of nanotechnology has prompted the development novel marine antifouling coatings. In this study, influence a pristine graphene nanoplatelet (GNP)-modified surface in cyanobacterial biofilm formation was evaluated over long-term assay using an vitro platform which mimics hydrodynamic conditions that prevail real environments. Surface characterization by Optical Profilometry and Scan...

Diatoms contribute to a substantial portion of primary production in the oceans and many lakes. Owing to their relatively heavy cell walls and high nutrient requirements, planktonic diatoms are expected to decrease with climate warming because of reduced nutrient redistribution and increasing sinking velocities. Using a historical dataset, this study shows that diatoms were able to maintain the...

Glass ionomer cements (GIC) are dental restorative materials that are suitable for modification to help prevent dental plaque (biofilm) formation. The aim of this study was to determine the effects of incorporating casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) into a GIC on the colonisation and establishment of Streptococcus mutans biofilms and the effects of aqueous CPP-ACP on es...

We measured primary production during spring– summer 2006–2007 to determine the carbon supply to the low-salinity pelagic food web of the San Francisco Estuary (SFE). Weekly or biweekly samples were taken at three stations of fixed salinity for size-fractionated primary production and biomass, both as chlorophyll and from biovolume based on counts. Error variance in productivity estimates arose...

Effects of chronic concentrations of linuron (0, 0.5, 5, 15, 50, and 150 micrograms/L) were studied in indoor, macrophyte dominated, freshwater microcosms. The concentrations were kept at a constant level for 4 weeks. This paper is the first in a series of two and summarizes the course of the linuron concentrations in time and its effects on macrophytes, periphyton, and phytoplankton. These end...