Congratulations to Joseph Wasswa who was awarded a travel stipend for his presentation “Assessing the potential of fluorescence spectroscopy to track the presence of contaminants in water reuse systems” at the 253rd ACS National Meeting & Exposition featuring our C3 Submersible Fluorometer.

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California State Lands Commission (CSLC) recently completed a validation exercise of three indicative sampling tools while developing their draft compliance assessment protocols. They evaluated the sampling tools with three different ballast water treatment systems – one UV system and two Electrochlorination systems. In all three assessments, the Ballast-Check 2 results were very similar to the microscopy and flow cytometry results (mean results over three replicates showed a maximum difference of 3 cells/mL, always matching the risk of exceedance level). Chris Brown, Senior Environmental Scientist with the Commission’s Marine Invasive Species Program, presented the results of their validation at the March 16, 2017 ICES/IMO Ballast Water Workgroup meeting. He detailed the planned compliance assessment protocols, if adopted, would be multi-tiered – 1) paperwork, calibration, & functionality; 2) indicative sampling; and 3) full scale testing.  Indicative tools such as the Ballast-Check 2 would be employed when the second tier of indicative sampling is deemed necessary.

>>Learn more about Ballast-Check 2

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Turbidity Plus with Integrated Wiper

Turbidity measurements are often made in shallow waters and keeping the instrument optical face clear is particularly important.  Turner Designs is excited to introduce a new turbidity sensor addressing this issue with a simple solution.  Turbidity Plus is an accurate single-channel turbidity sensor including an integrated wiper which is triggered by the user.  It is designed for integration with multiparameter systems and dataloggers from which it receives power and the wiper trigger. Turbidity Plus delivers a voltage output proportional to the turbidity of the sample which can be correlated to nephelometric turbidity unit (NTU) values by calibrating with a standard of known concentration.  Deployable to 200m, Turbidity Plus is available with or without a plastic housing for simplified integration.  >>Learn More

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Effective April 1, 2017, Cyclops-7F replaces Cyclops-7 Submersible Sensors. Cyclops-7F requires only 1 second after power up before taking measurements. As the Cyclops-7 required 5 seconds, this is a significant reduction in power required, especially if repeatedly power cycling the sensor. All other specifications remain the same.

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Early identification of Harmful Algal Blooms (HABs) is key to mitigating their effects and protecting public health. Turner Designs’ CyanoFluor is a new handheld fluorometer equipped with optics for detecting chlorophyll (CHL) and phycocyanin (PC) responses from natural water samples. CyanoFluor uses these responses to calculate and report a PC to CHL ratio for estimating the relative abundance of cyanobacteria within a phytoplankton population. By monitoring PC to CHL ratios over time, users can tell whether environmental conditions are changing, favoring cyanobacterial production which typically leads to the formation of HABs. CyanoFluor also provides raw fluorescence readings, which can be used to estimate chlorophyll concentrations.

CyanoFluor is factory-calibrated; no calibration standards or tools are required. Solid state optoelectronics ensure long term instrument stability. Results are displayed in less than 30 seconds and logged for future downloading. CyanoFluor is a perfect field instrument for HAB monitoring efforts – small, lightweight, battery-powered, waterproof and easy to use.

>> Product Overview
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Congratulations to Matthew Gray who was awarded a Travel Stipend for his poster presentation at ASLO 2017 featuring our C-sense pCO2 Sensor.

::Presentation Overview::
The Sustainable Ecological Aquaculture Network (SEANET) seeks to expand and enhance aquaculture production in Maine to meet domestic demand and bolster this emerging industry. With >3,000 miles of coastline, identifying suitable habitat for aquaculture in Maine is a daunting but potentially lucrative and necessary task to optimize production and profitability of farms.

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Congratulations to Jayme Smith who was awarded a Travel Stipend for her poster presentation at ASLO 2017 featuring our Trilogy Laboratory Fluorometer.

::Study Questions::
•  Will the diverted Hyperion effluent cause a phytoplankton
bloom in Santa Monica Bay?

•  If phytoplankton do respond, what groups responded and
what was the magnitude of the response?

•  If phytoplankton do not respond, what inhibited the
response?

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Congratulations to Alice Lie who was awarded a Travel Stipend for her poster presentation at ASLO 2017 featuring our Trilogy Laboratory Fluorometer.

::Presentation Overview::

  • Phagotrophic phytoflagellates are mixotrophic algae that can obtain carbon and energy through both photosynthesis and phagotrophy (bacterivory).
  • There is a spectrum of mixotrophic strategies ranging from predominantly phototrophic to predominantly phagotrophic.
  • Knowledge of different nutritional strategies and metabolism of mixotrophs will enable a better understanding of the functional roles of mixotrophs in communities.
  • Ochromonas is a genus of mixotrophic chrysophytes. Many species are predominantly bacterivores, but Ochromonas sp. strain CCMP1393 is obligately phototrophic.
  • This study investigates the gene expression of Ochromonas sp. strain CCMP1393 under different light regimes and bacteria availability.

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Last month our Applications Scientist, Lawrence Younan, presented “Fluorometers; Experiences with Autonomous Vehicles” at Oceanology International North America.  Learn more about how our C3 and Cyclops Integrator Submersible Fluorometers integrate with gliders and AUVs by viewing the presentation here.

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Moss Landing Marine Laboratories (MLML), located in central Monterey Bay, is part of the California State University system. With support from the Central and Northern California Ocean Observing System (CeNCOOS), MLML operates a shore station situated at the head of Monterey Canyon. Seawater pumped from an intake directly offshore in 17m of water is used in the labs for research and educational activities. A suite of sensors has been monitoring the physical and chemical properties of seawater at this location since 2010.

To gain a better understanding of regional carbonate chemistry, and to support research on the biological impacts of ocean acidification, MLML installed a Turner C-sense pCO2 sensor at this site. A month of preliminary data, collected during October 2016, shows strong fluctuations in temperature, pCO2, and pH. This site is known to be strongly influenced by large-amplitude internal waves, which are generated offshore by tidal currents flowing over steep topography and are then funneled through the canyon towards Moss Landing. Unlike surface waves, these internal waves are barely detectable at the sea surface, but they do have a strong effect on subsurface water properties, leading to strong fluctuations in pCO2 levels about twice per day. The colder water is characterized by high pCO2 due to microbial respiration below the euphotic zone, especially during times of the year when there is high productivity associated with coastal upwelling.

The data from this station will help MLML researchers better understand the physical and biological processes that influence the chemistry of seawater along the California coast. Monitoring the strong variability in seawater chemistry that occurs due to tidally-driven internal waves will allow for laboratory experiments that investigate a wide range of relevant oceanic conditions.

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