Aquation has developed a fluorescence-based pH monitoring device suitable for measuring seawater carbonate chemistry in marine and estuarine waters. It measures seawater pH, electrical conductivity (salinity) and temperature. The device is fully autonomous and is designed for deployment for weeks to months, depending on measurement frequency. Advantages of this device include: pressure insensitive optical measuring…
Read MoreWith the International Coral Reef Symposium meeting in Honolulu later this year, we thought it is a good time to illustrate how Aquation Shutter Fluorometers can be used to measure coral health. As you can see in the images, the Shutter Fluorometer is positioned adjacent to, or over, a coral. Most of the time the…
Read MoreThe Aquation Submersible Respirometer system was deployed at 14 m under the sea-ice at O’Brien Bay, East Antarctica (near Casey Station, Windmill Islands). The substrate at this location comprises many small rocks and boulders interspersed with irregular shallow patches of soft sediment, typically one to three meters across. previous studies have identified diatoms as the…
Read MoreThe Australian Antarctic Division is coordinating a field-based ocean acidification experiment in Antarctic waters near Casey Station, Windmill Islands, East Antarctica ( 66°17′ S 110°31′ E) this austral summer 2014-15. This antFOCE (antarctic Free Ocean Carbon Dioxide Enrichment) experiment will expose a range of benthic marine animals and algae to a constant supply of CO2-enriched…
Read MoreNew paper describing the use of the Aquation White light-emitting Reflectance-Absorptance-Transmittance meter or (White-RAT). The earlier Blue-RAT and later version White-RAT enable the direct convenient measurement of leaf absorptance by measuring the proportion of light transmitted through a leaf and that reflected off the leaf. Absorptance is then calculated and displayed on the meter. The…
Read MoreSatellite Workshop for the 10th International Temperate Reef Symposium Dr John Runcie (Aquation Pty Ltd) and Dr Jeff Cosgrove (Murdoch University) On Monday 20th and Tuesday 21st January 2014, Dr Runcie and Dr Cosgrove convened a two day workshop following the 10th ITRS at the University of Western Australia. The workshop provided a forum for…
Read MoreRaymond J. Ritchie and John W. Runcie Research paper in Photochemistry and Photobiology, doi: 10.1111/j.1751-1097.2012.01241.x. “Photosynthetic Electron Transport in an Anoxygenic Photosynthetic Bacterium Afifella (Rhodopseudomonas) marina Measured Using PAM Fluorometry.” This paper describes the use of the Blue-RAT in determining values of photosynthetic absorptance, a requirement for the calculation of Electron Transport Rate (ETR). As…
Read MoreGraeme F. Clark, Jonathan S. Stark, Emma L. Johnston, John W. Runcie, Paul M. Goldsworthy, Ben Raymond, Martin J. Riddle Research paper in: Global Change Biology, DOI: 10.1111/gcb.12337 The paper discusses applications and analysis of data obtained from autonomous monitoring of photosynthetic capacity and electron transport of selected Antarctic marine macroalgae. Prototype fluorometers and irradiance sensors were used that were…
Read MoreMazzuca et al. 2013, “Establishing research strategies, methodologies and technologies to link genomics and proteomics to seagrass productivity, community metabolism, and ecosystem carbon fluxes”. This paper describes work conducted during a seagrass workshop held in Corsica, France in 2011, as part of the COST Action “Seagrass productivity: from genes to ecosystem management”. Aquation fluorometers were…
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