AI Article Synopsis
- - The study analyzed the presence of lipophilic phycotoxins (LPTs) and domoic acid (DA) in Antarctic and nearby ocean waters, detecting seven specific toxins including pectenotoxin-2 (PTX2), which was the most prevalent.
- - PTX2 was found to be widely distributed in Antarctic seawater, with total LPT concentrations ranging from 0.10 to 13.57 ng/L, averaging 2.20 ng/L, and higher levels were observed in the eastern regions compared to the western areas.
- - The research indicated that PTX2 concentrations were notably higher in the epipelagic zone (surface water) compared to deeper waters, and suggested that the
Article Abstract
Lipophilic phycotoxins (LPTs) and domoic acid (DA) in Antarctic seawater, as well as parts of the South Pacific and the Southern Indian Oceans were systematically investigated. DA and six LPTs, namely pectenotoxin-2 (PTX2), okadaic acid (OA), yessotoxin (YTX), homo-yessotoxin (h-YTX), 13-desmethyl spirolide C (SPX1), and gymnodimine (GYM), were detected. PTX2, as the dominant LPTs, was widely distributed in seawater surrounding Antarctica, whereas OA, YTX, and h-YTX were irregularly distributed across the region. The total concentration of LPTs in surface seawater ranged from 0.10 to 13.57 ng/L (mean = 2.20 ng/L). ∑LPT levels were relatively higher in the eastern sea areas of Antarctica than in the western sea areas. PTX2 was the main LPT in the vertical profiles, and the PTX2 concentration was significantly higher in the epipelagic zone than water depths below 200 m. The predominant sources of PTX2 and OA in Antarctic sea areas are likely to be Dinophysis.
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| http://dx.doi.org/10.1016/j.marpolbul.2024.116250 | DOI Listing |
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