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In 2011, Lake Erie experienced the largest harmful algal bloom in its recorded history, with a peak intensity over three times greater than any previously observed bloom. Here we show that long-term trends in agricultural practices are consistent with increasing phosphorus loading to the western basin of the lake, and that these trends, coupled with(More)
Hypoxic conditions, defined as dissolved oxygen (DO) concentrations below 2 mg/L, are a regular summertime occurrence in Lake Erie, but the spatial extent has been poorly understood due to sparse sampling. We use geostatistical kriging and conditional realizations to provide quantitative estimates of the extent of hypoxia in the central basin of Lake Erie(More)
The Alliance for Coastal Technologies (ACT) has been established to support innovation and to provide the information required to select the most appropriate tools for studying and monitoring coastal and ocean environments. ACT is a consortium of nationally prominent ocean science and technology institutions and experts who provide credible performance data(More)
TECHNOLOGY TYPE: Coupled conductivity and temperature sensors with instrument based algorithms for estimation of salinity APPLICATION: In situ estimates of salinity for coastal moored and profiled deployments NOTICE: ACT verifications are based on an evaluation of technology performance under specific, agreed-upon protocols, criteria, and quality assurance(More)
We propose the use of Bayesian hierarchical/multilevel ratio approach to estimate the annual riverine phosphorus loads in the Saginaw River, Michigan, from 1968 to 2008. The ratio estimator is known to be an unbiased, precise approach for differing flow-concentration relationships and sampling schemes. A Bayesian model can explicitly address the uncertainty(More)
Direct measurement of pCO 2 in natural water using gas equilibration and infrared detection of the gas stream APPLICATION: In-situ measurements of pCO 2 for coastal mooring. NOTICE: ACT Demonstration Projects are evaluations of technology performance under specific protocols, criteria, and quality assurance procedures that are established by mutual(More)
Human activities are causing a global proliferation of cyanobacterial harmful algal blooms (CHABs), yet we have limited understanding of how these events affect freshwater bacterial communities. Using weekly data from western Lake Erie in 2014, we investigated how the cyanobacterial community varied over space and time, and whether the bloom affected(More)
Oligotyping is a computational method used to increase the resolution of marker gene microbiome studies. Although oligotyping can distinguish highly similar sequence variants, the resulting units are not necessarily phylogenetically and ecologically informative due to limitations of the selected marker gene. In this perspective, we examine how oligotyping(More)
APPLICATION: In-situ measurements of pCO 2 for coastal mooring. NOTICE: ACT Demonstration Projects are evaluations of technology performance under specific protocols, criteria, and quality assurance procedures that are established by mutual agreement of the ACT technical committee, technical staff and participating vendors. ACT and its Partner Institutions(More)
Annual cyanobacterial blooms dominated by Microcystis have occurred in western Lake Erie (U.S./Canada) during summer months since 1995. The production of toxins by bloom-forming cyanobacteria can lead to drinking water crises, such as the one experienced by the city of Toledo in August of 2014, when the city was rendered without drinking water for >2 days.(More)