Distribution Characteristics and Environmental Control Factors of Lipophilic Marine Algal Toxins in Changjiang Estuary and the Adjacent East China Sea

Marine algal toxins, highly toxic secondary metabolites, have significant influences on coastal ecosystem health and mariculture safety. The occurrence and environmental control factors of lipophilic marine algal toxins (LMATs) in the surface seawater of the Changjiang estuary (CJE) and the adjacent...

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Bibliographic Details
Published in:Toxins 2019-10, Vol.11 (10), p.596
Main Authors: He, Xiuping, Chen, Junhui, Wu, Danni, Sun, Ping, Ma, Xin, Wang, Jiuming, Liu, Lijun, Chen, Kan, Wang, Baodong
Format: Article
Language:English
Subjects:
Algae
Algal toxins
Aquaculture
changjiang estuary
Chemical analysis
Chromatography
Climate effects
Coastal ecosystems
Dinophysis
Dissolved oxygen
east china sea
Environmental control
Estuaries
Eutrophication
Hydrology
large river estuary
Lipophilic
Lipophilicity
marine algae toxins
Marine aquaculture
Mass spectrometry
Metabolites
Microorganisms
Nutrients
Nutritional status
Okadaic acid
phytoplankton
Salinity
Scientific imaging
Seawater
Secondary metabolites
Shellfish
Toxins
Water analysis
Water quality
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Summary:Marine algal toxins, highly toxic secondary metabolites, have significant influences on coastal ecosystem health and mariculture safety. The occurrence and environmental control factors of lipophilic marine algal toxins (LMATs) in the surface seawater of the Changjiang estuary (CJE) and the adjacent East China Sea (ECS) were investigated. Pectenotoxin-2 (PTX2), okadaic acid (OA), dinophysistoxin-1(DTX1), and gymnodimine (GYM) were detected in the CJE surface seawater in summer, with concentration ranges of not detected (ND)-105.54 ng/L, ND-13.24 ng/L, ND-5.48 ng/L, and ND-12.95 ng/L, respectively. DTX1 (ND-316.15 ng/L), OA (ND-16.13 ng/L), and PTX2 (ND-4.97 ng/L) were detected in the ECS during spring. LMATs formed a unique low-concentration band in the Changjiang diluted water (CJDW) coverage area in the typical large river estuary. PTX2, OA, and DTX1 in seawater were mainly derived from and , while GYM was suspected to be from . Correlation analyses showed that LMAT levels in seawater were positively correlated with dissolved oxygen and salinity, but negatively correlated with temperature and nutrients, indicating that the hydrological condition and nutritional status of seawater and climatic factors exert significant effects on the distribution of LMATs.
ISSN:2072-6651
2072-6651
DOI:10.3390/toxins11100596