A5063664644- Marine and coastal ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine Toxins and Detection Methods
- Fish Ecology and Management Studies
- Ocean Acidification Effects and Responses
- Water Quality Monitoring and Analysis
- Soil and Water Nutrient Dynamics
- Microbial Community Ecology and Physiology
- Protist diversity and phylogeny
- Hydrology and Watershed Management Studies
- Biocrusts and Microbial Ecology
- Marine Bivalve and Aquaculture Studies
- Atmospheric and Environmental Gas Dynamics
- Marine Biology and Ecology Research
- Water Quality Monitoring Technologies
- Environmental Chemistry and Analysis
- Calcium Carbonate Crystallization and Inhibition
- Aquatic Invertebrate Ecology and Behavior
- Aquatic Ecosystems and Biodiversity
- Air Quality Monitoring and Forecasting
- Algal biology and biofuel production
- Coastal and Marine Management
- Remote Sensing in Agriculture
- Coral and Marine Ecosystems Studies
NOAA Great Lakes Environmental Research Laboratory
2021-2024
National Oceanic and Atmospheric Administration
2020-2024
Louisiana State University Agricultural Center
2021
Louisiana State University
2018
Texas A&M University
2007-2014
Abstract The development of algorithms for remote sensing water quality (RSWQ) requires a large amount in situ data to account the bio-geo-optical diversity inland and coastal waters. GLObal Reflectance community dataset Imaging optical Aquatic environments (GLORIA) includes 7,572 curated hyperspectral reflectance measurements at 1 nm intervals within 350 900 wavelength range. In addition, least one co-located measurement chlorophyll , total suspended solids, absorption by dissolved...
Retrieval of aquatic biogeochemical variables, such as the near-surface concentration chlorophyll-a (Chl a ) in inland and coastal waters via remote observations, has long been regarded challenging task. This manuscript applies Mixture Density Networks (MDN) that use visible spectral bands available by Operational Land Imager (OLI) aboard Landsat-8 to estimate Chl . We utilize database co-located situ radiometric measurements (N = 4,354), referred Type A data, train test an MDN model (MDN )....
The growth rate, stationary cell concentration, and toxicity of Prymnesium parvum N. Carter were measured using a strain isolated from Texas inland waters. We used multifactor experimental approach with multiple regression analysis to determine the importance environmental factors, including temperature, light, salinity these algal measurements. Exponential rate was unimodal in relation salinity, irradiance, an estimated maximal 0.94 d −1 occurring at 27°C, 22 practical units (psu), 275 μmol...
Abstract. The western basin of Lake Erie has a history recurrent cyanobacterial harmful algal blooms (HABs) despite decades efforts by the United States and Canada to limit phosphorus loading, major driver blooms. In response, National Oceanic Atmospheric Administration (NOAA) Great Lakes Environmental Research Laboratory (GLERL) Cooperative Institute for (CIGLR) created an annual sampling program detect, monitor, assess, predict HABs in (WLE). Here we describe data collected from this...
Abstract Toxic harmful algal blooms produce public health hazards in freshwater systems around the world. There is a need for forecast that can mitigate risk of exposure to toxins. We improved an approach predict spatially and temporally resolved probability microcystins (MCs) exceeding threshold level (6 μg L −1 ) western Lake Erie. This combines 5‐day chlorophyll‐a model, weekly updated regression model predicting MCs from chlorophyll‐a, empirical relationship between predicted observed...
With the increase in frequency of harmful algal blooms (HABs) worldwide, a better understanding mechanisms that influence toxin production is needed. Karenia brevis , major HAB dinoflagellate Gulf Mexico, produces potent neurotoxins, known as brevetoxins. Human health directly impacted by K. through consumption shellfish contaminated accumulated brevetoxins (neurotoxic poisoning) or from aerosolized sea spray (reduced respiratory function); however, reason for brevetoxin has remained...
Biomolecular analyses are used to investigate the dynamics of cyanobacterial harmful algal blooms (cyanoHABs), with samples collected during monitoring often analyzed by qPCR and sometimes amplicon metagenomic sequencing. However, cyanoHAB research programs face operational constraints due reliance on human resources for sample collections. To address this impediment, a third-generation Environmental Sample Processor (3G ESP) integrated long-range autonomous underwater vehicle (LRAUV) was...
Abstract Cyanobacterial harmful algal blooms (CyanoHABs) in the Great Lakes pose risks to residential drinking water use, fisheries, and recreation. Active mitigation of these requires rapid detection CyanoHABs quantification toxins they produce. Here, we present a method using long‐range autonomous underwater vehicle (LRAUV) equipped with 3 rd ‐generation Environmental Sample Processor (3G‐ESP) search for adaptively sample areas high chlorophyll potentially representative CyanoHAB biomass....
Abstract Freshwater cyanobacterial harmful algal blooms (CHABs) are a well‐known global public health threat. Monitoring and early detection of CHAB toxins currently accomplished using labor‐intensive sampling techniques subsequent shore‐based analyses, with results typically reported 24–48 h after sample collection. We have developed implemented an uncrewed, autonomous mobile sampler‐analytical system capable conducting targeted in situ toxin measurements < 2 h. A surface plasmon...
Roelke, Daniel L., Leslie Schwierzke, Bryan W. Brooks, James P. Grover, Reagan M. Errera, Theodore Valenti, Jr., and L. Pinckney, 2010. Factors Influencing Prymnesium parvum Population Dynamics During Bloom Initiation: Results from In‐Lake Mesocosm Experiments. Journal of the American Water Resources Association (JAWRA) 46(1):76‐91. DOI: 10.1111/j.1752‐1688.2009.00392.x Abstract: The alga forms large fish‐killing blooms in many Texas lakes. In some these lakes, however, occurs but does not...
Cyanobacterial harmful algal blooms are an increasing threat to coastal and inland waters. These can be detected using optical radiometers due the presence of phycocyanin (PC) pigments. The spectral resolution best-available multispectral sensors limits their ability diagnostically detect PC in other photosynthetic To assess role determination PC, a large ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$N...
A new planktonic species of Prorocentrum is described from the Gulf Mexico. First observed with Imaging FlowCytobot, texanum sp. nov. was characterized using LM, SEM, and TEM along sequencing SSU, LSU, ITS ribosomal regions mitochondrial cob cox1 regions. P. a round to oval bivalvate dinoflagellate, prominent anterior, serrated solid flange on periflagellar platelet an opposing short, flat h platelet. The area consists 10 platelets. Both left right valves have shallow depressions two-sized...
Biomineralization is the complex process by organisms produce protective and supportive structures. Employed mollusks, biomineralization enables creation of external shells for protection against environmental stressors. The shell deposition mechanism initiated in early stages development dependent upon concentration availability calcium carbonate ions. Changes concentrations critical ions required formation can result malformation shells. As pCO2 atmosphere continue to increase, oceans are...
Harmful algal blooms (HABs) are increasing globally in frequency, persistence, and geographic extent, posing a threat to ecosystem human health. To date, no occurrences of marine phycotoxins have been recorded Mozambique, which may be due absence monitoring program general awareness potential threats. This study is the first documentation neurotoxin, domoic acid (DA), produced by diatom Pseudo-nitzschia along east coast Africa. Coastal Inhambane Province biodiversity hotspot where year-round...
ABSTRACT Here, we report on the raw and coassembled metatranscriptomes of 39 Lake Erie surface (1.0 m) water samples collected over a 2-day diel period encompassing episodic weather bloom events. Preliminary taxonomic annotations read mappings revealed that Microcystis spp. accounted for up to ~47% transcriptionally active community.