Results 121 to 130 of about 960 (153)

Carotenoids of the Florida red tide dinoflagellate Karenia brevis

Biochemical Systematics and Ecology, 2003
The red tide dinoflagellate Karenia brevis, formerly Gymnodinium breve, contained fucoxanthin, 19′-butanoyloxyfucoxanthin and 19’-hexanoyloxyfucoxanthin as carotenoid chemotaxonomic markers. In addition to β,e-carotene, β,β-carotene, diatoxanthin, diadinoxanthin and 19-hexanoyloxyparacentrone 3-acetate, the diester of gyroxanthin was also present ...
Terje Bjørnland, Francis T. Haxo, Synnøve Liaaen-Jensen   +2 more
openaire   +1 more source

Prevention and control of Karenia brevis blooms

Harmful Algae, 2009
With the recurrent and potentially severe impacts of Karenia brevis blooms in the Gulf of Mexico, new management approaches have been examined to potentially prevent and control these blooms. This paper summarizes past and present research and strategies for the prevention and control of K. brevis blooms.
openaire   +1 more source

Diel vertical migration thresholds of Karenia brevis (Dinophyceae)

Harmful Algae, 2009
Abstract Light and nutrient availability change throughout dinoflagellate diel vertical migration (DVM) and/or with sub-population location in the water column along the west Florida shelf. Typically, the vertical depth of the shelf is greater than the distance a sub-population can vertically migrate during a diel cycle, limiting the ability of a sub-
Blake A. Schaeffer, Daniel Kamykowski, Geoff Sinclair, Laurie McKay, Edward J. Milligan   +4 more
openaire   +1 more source

Fate of four phthalate esters with presence of Karenia brevis: Uptake and biodegradation

Aquatic Toxicology, 2019
Phthalate esters (PAEs), one class of the most frequently detected endocrine-disrupting chemicals (EDCs) in marine environment, have aroused wide public concerns because of their carcinogenicity, teratogenicity, and mutagenicity. However, the environmental fate of PAEs in the occurrence of harmful algal blooms remains unclear.
Cuizhu Sun, Ge Zhang, Hao Zheng, Ning Liu, Mei Shi, Xianxiang Luo, Lingyun Chen, Fengmin Li, Shugang Hu   +8 more
openaire   +2 more sources

Optical Detection and Assessment of the Harmful Alga, Karenia brevis

2003
Abstract : Our overall hypothesis is that populations of the red tide species Karenia brevis give rise to distinct and identifiable optical signatures in inherent optical properties and remote sensing reflectance. Accordingly, the primary objective of this project is to refine and evaluate optical approaches to detect and assess bloom events of K ...
Oscar M. Schofield, Steven E. Lohrenz
openaire   +1 more source

Inhibitory effects and oxidative target site of dibutyl phthalate on Karenia brevis

Chemosphere, 2015
The inhibitory action and possible damage mechanism of dibutyl phthalate (DBP) on the red tide algae Karenia brevis were investigated. The results showed that the algae experienced oxidative stress after exposure to 5mgL(-1) DBP. Malondialdehyde (MDA) peaked after 72h, with a value approximately 2.3 times higher than that observed for untreated cells ...
Feng-min, Li, Miao, Wu, Yuan, Yao, Xiang, Zheng, Jian, Zhao, Zhen-yu, Wang, Bao-shan, Xing   +6 more
openaire   +2 more sources

A handheld NASBA analyzer for the field detection and quantification of Karenia brevis

Harmful Algae, 2007
Blooms of Karenia brevis, the red tide forming dinoflagellate in the Gulf of Mexico, cause a myriad of ecological and economic problems for coastal communities, including massive fish and mammal mortalities, and damage to tourism and fisheries/shellfish harvesting industries. There is a need for accurate detection and prediction of K.
Erica T. Casper, Stacey S. Patterson, Pragnesh Bhanushali, Andrew Farmer, Matthew Smith, David P. Fries, John H. Paul   +6 more
openaire   +1 more source

THE IMPACT OF SEVERE WEATHER PHENOMENA ON KARENIA BREVIS

2010
The impact of 1995 Hurricane Erin on Karenia brevis, a red tide dinoflagellate, was studied from seawater samples collected from nine stations in Sarasota Bay, Florida. Comparison was made between samples collected before and after the passing of the storm. Data suggests that the hurricane may have had a positive impact on K. brevis growth.
openaire   +1 more source

On the remote monitoring of Karenia brevis blooms of the west Florida shelf

Continental Shelf Research, 2008
Abstract In situ surveys (1997–2002) of Karenia brevis distribution on the west Florida shelf were used to explain spectral remote sensing reflectance, chlorophyll- a concentration, and backscattering coefficient estimates derived using SeaWiFS satellite data. Two existing approaches were tested in an attempt to differentiate K.
Hu, Chuanmin, Luerssen, Remy, Muller-Karger, Frank E., Carder, Kendall L., Heil, Cynthia A.   +4 more
openaire   +2 more sources

Nutrient availability in support of Karenia brevis blooms on the central West Florida Shelf: What keeps Karenia blooming?

Continental Shelf Research, 2008
Abstract Identifying nutrient sources, primarily nitrogen (N) and phosphorus (P), sufficient to support high biomass blooms of the red tide dinoflagellate, Karenia brevis, has remained problematic. The West Florida Shelf is oligotrophic, yet populations >106 cells L−1 frequently occur and blooms can persist for months.
Gabriel A. Vargo, Cynthia A. Heil, Kent A. Fanning, L. Kellie Dixon, Merrie Beth Neely, Kristen Lester, Danylle Ault, Susan Murasko, Julie Havens, John Walsh, Steven Bell   +10 more
openaire   +1 more source