Many drinking water utilities drawing from waters susceptible to harmful algal blooms (HABs) are implementing monitoring tools that can alert them the onset of blooms. Some have invested in fluorescence-based online probes measure phycocyanin, a pigment found cyanobacteria, but it is not clear how best use data generated. Previous studies focused on correlating phycocyanin fluorescence and cyan...

Recently, there has been a rise in freshwater harmful algal blooms (HABs) globally, as well as increasing aquaculture practices. HABs can produce cyanotoxins, many of which are hepatotoxins. An ultra-performance liquid chromatography tandem mass spectrometry method was developed and validated for nine cyanotoxins across three classes including six microcystins, nodularin, cylindrospermopsin and...

An observational study was performed in the central Southern California Bight in Spring 2010 to understand the relationship between seasonal spring phytoplankton blooms and coastal processes that included nutrient input from upwelling, wastewater effluent plumes, and other processes. Multi-month Webb Slocum glider deployments combined with MBARI environmental sample processors (ESPs), weekly pi...

The frequency and intensity of harmful algal blooms (HABs) and phytoplankton community shifts toward toxic species have increased worldwide. Although most research has focused on eutrophication as the cause of this trend, many other globaland regional-scale anthropogenic influences may also play a role. Ocean acidification (high pCO2/low pH), greenhouse warming, shifts in nutrient availability,...

In this study, we explore the potential contributions of a risk perception framework in understanding public perceptions of unstable ecosystems. In doing so, we characterize one type of common ecological risk- harmful algal blooms (HABs)-in four of the most seriously eutrophicated freshwater lakes in China. These lakes include Chaohu, Dianchi, Hongze, and Taihu, where a total of 2000 residents ...

In British Columbia (BC), harmful algal blooms (HABs) regularly cause severe economic losses through finfish mortalities and shellfish harvest closures due to toxin accumulation, gill damage, or hypoxia. As there is no routine governmental monitoring of HAB phenomena in BC, variability, its potential links environmental drivers are not well understood. Here we present results from a well-manage...

We study the design, implementation, performance, and scalability of concurrent objects on multicore systems. In the first part we analyze the apparent trade-off between adherence to concurrent data structure semantics and scalability based on a concurrent FIFO queue as running example. We quantitatively relax the sequential specification of a FIFO queue to a k-FIFO queue, which can be understo...

We present a study of the distribution of [O III] λ5007 and [O II] λ3727 emission in the Narrow Line Region (NLR) of the Seyfert 1 galaxy NGC 4151. While the NLR of NGC 4151 exhibits an overall structure consistent with the unified model of Seyfert galaxies, narrow-band [O III] and [O II] images obtained with the Wide Field and Planetary Camera 2 aboard the Hubble Space Telescope (HST) reveal s...