Lipophilic marine toxins in sediments from Arrábida marine protected area, Portugal (NE Atlantic).
Mar Pollut Bull
; 208: 117096, 2024 Oct 07.
Article
in En
| MEDLINE
| ID: mdl-39378546
ABSTRACT
During the development and senescence of harmful algal blooms (HAB), most of the algae cells not ingested by grazers or filter-feeding organisms sink to the bottom, making sediments important reservoirs of algae toxins. In this study, lipophilic marine toxins were determined in the sediments collected from depths ranging from 5 to 145 m depth in the marine protected area of Arrábida (southwest Portuguese coast). Sediments were characterized in terms of granulometry, water and organic matter content. The toxins were determined by liquid chromatography with tandem mass spectrometry. Okadaic acid (OA), dinophysistoxin-2 (DTX2), and azaspiracid-2 (AZA2), reaching concentrations up to 3.4, 1.3, and 0.13 ng/g, respectively, were found. A trend in the occurrence of DTX2 and AZA2 with sediment water and organic matter content was observed, as well as with AZA2 and depth. This study highlights the need to further investigate sediment deposition of toxins and their availability for bottom-dwelling organisms and its contamination.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Mar Pollut Bull
/
Mar. pollut. bull
/
Marine pollution bulletin
Year:
2024
Document type:
Article
Affiliation country:
Portugal
Country of publication:
United kingdom