Citation:

oceanog.2018.417

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Abstract:

The occurrence of harmful algal blooms (HABs) is a global problem, and particularly in San Jorge Gulf (SJG), Argentina, which supports important fisheries, HABs represent a risk to human health. We studied the diversity and distribution of toxigenic dinoflagellates in the SJG using toxin detection and quantification, and assessed the connections between cell densities, toxins, and oceanographic parameters. Phytoplankton net samples were taken for microscopic and liquid chromatography-tandem mass spectrometry (LC-MSMS) analyses during an expedition aboard R/V Coriolis II in February 2014. Solid phase adsorption toxin tracking (SPATT) devices were also deployed to determine the presence of dissolved lipophilic toxins in seawater. Toxigenic dinoflagellate species and associated toxins showed different distribution patterns in the north and the south SJG. Protoceratium reticulatum and Dinophysis acuminata, together with yessotoxin and pectenotoxins, were predominantly detected in the northern SJG, mainly associated with low-nutrient, warmer waters. By contrast, Alexandrium catenella and paralytic shellfish toxins showed the highest relative abundances in the southern SJG, associated with high-nutrient, low-temperature waters. Cellular toxin content was also differently affected by environmental parameters, highlighting the complexity of HABs in this area. Spirolides were detected by SPATT for the first time in the SJG, suggesting the occurrence of A. ostenfeldii.

Coverage:

Median Latitude: -46.120580 * Median Longitude: -65.823199 * South-bound Latitude: -47.022833 * West-bound Longitude: -66.919717 * North-bound Latitude: -45.165017 * East-bound Longitude: -65.400500

Date/Time Start: 2014-02-05T00:00:00 * Date/Time End: 2014-02-15T00:00:00

Minimum Elevation: -20.0 m * Maximum Elevation: -20.0 m

Event(s):

COR-II_1402_F1 * Latitude: -46.560000 * Longitude: -65.853567 * Date/Time: 2014-02-05T00:00:00 * Elevation: -20.0 m * Campaign: * Basis: * Method/Device: (CTD-RO)

COR-II_1402_F3 * Latitude: -46.598183 * Longitude: -65.736567 * Date/Time: 2014-02-05T00:00:00 * Elevation: -20.0 m * Campaign: * Basis: * Method/Device: (CTD-RO)

COR-II_1402_F5 * Latitude: -46.509083 * Longitude: -65.945167 * Date/Time: 2014-02-14T00:00:00 * Elevation: -20.0 m * Campaign: * Basis: * Method/Device: (CTD-RO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Event label	Event		Krock, Bernd
2	Date/Time of event	Date/Time		Krock, Bernd
3	Latitude of event	Latitude		Krock, Bernd
4	Longitude of event	Longitude		Krock, Bernd
5	Elevation of event	Elevation	m	Krock, Bernd
6	Station label	Station		Krock, Bernd
7	Pectenotoxin 2 per net tow	PTX-2	ng/NT	Krock, Bernd	Tandem mass spectrometry
8	Pectenotoxin 2sa per net tow	PTX-2sa	ng/NT	Krock, Bernd	Tandem mass spectrometry
9	Yessotoxin per net tow	YTX	ng/NT	Krock, Bernd	Tandem mass spectrometry
10	Paralytic shellfish poisoning toxins per net tow	PSP	ng/NT	Krock, Bernd	Tandem mass spectrometry
11	Dinophysis acuminata, per net tow	D. acuminata	10³ #/NT	Krock, Bernd
12	Protoceratium reticulatum, per net tow	P. reticulatum	10⁶ #/NT	Krock, Bernd
13	Gonyaulax spinifera, per net tow	G. spinifera	10⁶ #/NT	Krock, Bernd
14	Alexandrium catenella, per net tow	A. catenella	10⁶ #/NT	Krock, Bernd

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

240 data points

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