A5087418977- Marine and coastal ecosystems
- Marine Toxins and Detection Methods
- Analytical chemistry methods development
- Chemical Thermodynamics and Molecular Structure
- Marine Biology and Ecology Research
- Spectroscopy and Laser Applications
- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Microbial Community Ecology and Physiology
- Analytical Chemistry and Chromatography
- Mass Spectrometry Techniques and Applications
- Laser-induced spectroscopy and plasma
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Scientific Measurement and Uncertainty Evaluation
- Various Chemistry Research Topics
- Protist diversity and phylogeny
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fire dynamics and safety research
- Space Exploration and Technology
- Plasma Diagnostics and Applications
- Advanced Chemical Sensor Technologies
- Atmospheric Ozone and Climate
Florida Gulf Coast University
2014-2024
University of Saskatchewan
1966-2024
Louisiana State University
2006-2014
Louisiana Universities Marine Consortium
1999-2013
University of Hawaii at Hilo
1999-2008
University of Cambridge
2005
University of Glasgow
2005
Arizona State University
1978-1989
Motorola (United States)
1987-1989
Los Alamos National Laboratory
1987-1988
Pseudo‐nitzschia H. Peragallo, a marine planktonic diatom genus containing some species capable of producing the neurotoxin domoic acid, is often documented in extremely high concentrations northern Gulf Mexico plume Mississippi River, especially when river flow and nutrient inputs are high. Limited historical data suggest that abundance has increased since 1950s. Five sediment cores were collected analyzed to test whether increases coincided with increasing thereby suggesting cause‐effect...
We examined a suite of paleoindicators in 210 Pb‐dated sediment cores to determine the historical course primary production, eutrophication, and oxygen stress coastal ocean adjacent plumes Mississippi Atchafalaya rivers. The assumption that hypoxia is natural feature ecosystem northern Gulf Mexico influenced by discharge River system not supported accumulated sediments. There propensity for develop because high physical dynamics on continental shelf support stratification. However,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 146:249-264 (1997) - doi:10.3354/meps146249 Abundance and vertical flux of Pseudo-nitzschia in northern Gulf Mexico Dortch Q, Robichaux R, Pool S, Milsted D, Mire G, Rabalais NN, Soniat TM, Fryxell GA, Turner RE, Parsons ML Many species ubiquitous pennate diatom genus have recently been discovered produce...
Salinity varies widely in coastal areas that often have a high abundance of Pseudo‐nitzschia H. Peragallo. is abundant Louisiana waters, and cellular domoic acid has been observed natural samples but no human illness reported. To assess the threat amnesic shellfish poisoning (ASP), we examined effect salinity on occurrence field growth laboratory with special emphasis range where oysters are harvested (10–20 psu). In spp. occurred over 1 to >35 psu, they more frequently at higher rather...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of a Continuous Source in Flame Fluorescence Spectrometry.Claude. Veillon, J. M. Mansfield, L. Parsons, and D. WinefordnerCite this: Anal. Chem. 1966, 38, 2, 204–208Publication Date (Print):February 1, 1966Publication History Published online1 May 2002Published inissue 1 February 1966https://pubs.acs.org/doi/10.1021/ac60234a014https://doi.org/10.1021/ac60234a014research-articleACS PublicationsRequest reuse permissionsArticle...
A literature review demonstrates that crude oil spills can affect phytoplankton, favoring the growth of some while inhibiting others. Subsequently, phytoplankton assemblage change as a result exposure to oil. Studies responses Macondo (Deepwater Horizon) spill indicate may have been stimulated by spill, although presence low-salinity water in region makes it difficult discount importance riverine-borne nutrients factor. few studies suggest was toxic species, whereas others degree tolerance...
Benthic dinoflagellates in the genus Gambierdiscus produce ciguatoxin precursors responsible for occurrence of ciguatera toxicity. The prevalence toxins fish has been linked to presence and distribution toxin-producing species coral reef ecosystems, which is largely determined by suitable benthic habitat environmental conditions favorable growth. Here using single factor experiments, we examined effects salinity, irradiance, temperature on growth 17 strains representing eight...
We measured the temporal and spatial trajectory of oiling from April, 2010, Deepwater Horizon oil spill in water Louisiana's continental shelf, estuarine waters Barataria Bay, coastal marsh sediments. The concentrations 28 target alkanes 43 polycyclic aromatic hydrocarbons were determined samples collected on 10 offshore cruises, 19 monthly one km at 13 inshore stations 2010 2013, 16-60 surficial sediment each 26 trips. concentration total aromatics peaked late summer, 100 times above May,...
A multi‐platform sampling strategy was used to investigate carbon cycling in a cold‐core eddy that formed the lee of Hawaii during September 2000. Microheterotroph biomass and 234 Th‐derived export rates within were 2 3 times higher than those observed for adjacent waters. If this is representative other cyclonic eddies are frequently Hawaii, then activity may significantly enhance areal efficiency biological pump facilitate transfer organic organisms inhabiting mesopelagic abyssal‐benthic...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 220:83-92 (2001) - doi:10.3354/meps220083 Pseudo-nitzschia sp. cf. pseudodelicatissima ‹ a confirmed producer of domoic acid from northern Gulf Mexico Youlian Pan1,3,**, Michael L. Parsons2,**, Mark Busman1, Peter D. R. Moeller1, Quay Dortch2, Christine Powell2, Gregory J. Doucette1,3,* 1Marine Biotoxins...
An 18‐month field survey of the Pseudo‐nitzschia population present in Louisiana coastal waters was conducted comparing species abundance estimates by novel fluorescent molecular probes (16S large subunit rDNA oligonucleotide sequences) with traditional electron and differential‐interference light microscopy. While probe microscopic analyses agreed on presence or absence four common ( P. multiseries (Hasle) Hasle, pseudodelicatissima delicatissima (P.T. Cleve) Heiden, pungens (Grunow) Hasle...
A Fortran program was written to calculate the approximate total half-intensity linewidths of several spectral lines for a number atoms in some common analytical flames. By means this program, any atomic line can be calculated if sufficient and flame compositional data are available. Calculations have been made 136 60 elements, tabulated.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDerivation of expressions for calculation limiting detectable atomic concentration in fluorescence flame spectrometryJames D. Winefordner, Michael L. Parsons, Joseph M. Mansfield, and William J. McCarthyCite this: Anal. Chem. 1967, 39, 4, 436–442Publication Date (Print):April 1, 1967Publication History Published online1 May 2002Published inissue 1 April...