Variability of dinoflagellates and their associated toxins in relation with environmental drivers in Ambon Bay, eastern Indonesia

Likumahua, Sem; Boer, M. Karin de; Krock, Bernd; Hehakaya, Salomy; Imu, La; Müller, A. Hermann; Max, Thomas; Buma, Anita G. J.

doi:10.1016/j.marpolbul.2019.110778

Cited by 11 publications

(5 citation statements)

References 62 publications

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“…Among the DSTs, only PTXs were detected and quantified at all sampling stations. PTX-2 was the major toxin, reaching levels much higher (up to 206 ng NT −1 in the 20–50 µm size fraction and up to 426 ng NT −1 in the 50–200 µm size fraction) than previously reported in plankton samples from the Bulgarian coast (0.862 ng PTX-2 NT −1 ) [ 24 ], and also from other basins (26 ng NT −1 in Ambon Bay, Indonesia [ 63 ]; 43 ng NT −1 in Southeastern Pacific fjords [ 64 ]). PTX-2 and PTX-2sa also dominated in farmed mussels from Russian waters, with a corresponding presence of D. caudata and P. rotundatum , while okadaic acid (OA) and the related congener (DTX-1) were below the level of quantification [ 28 ].…”

Section: Discussionmentioning

confidence: 91%

“…Nevertheless, DSTs are so potent that they may cause harm even at low cell densities [ 80 ]. Globally, Dinophysis bloom initiation and toxin production were associated with various environmental parameters, e.g., stratification, temperature, salinity, irradiance, upwelling, nutrients, or dissolved oxygen [ 63 , 81 , 82 , 83 , 84 ]. Vershinin and Kamnev [ 27 ] suggested a positive correlation between water temperature and Dinophysis development and consequent DSP cases in the Black Sea.…”

Section: Discussionmentioning

confidence: 99%

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New Knowledge on Distribution and Abundance of Toxic Microalgal Species and Related Toxins in the Northwestern Black Sea

Dzhembekova

Moncheva

Slabakova

et al. 2022

Toxins

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Numerous potentially toxic plankton species commonly occur in the Black Sea, and phycotoxins have been reported. However, the taxonomy, phycotoxin profiles, and distribution of harmful microalgae in the basin are still understudied. An integrated microscopic (light microscopy) and molecular (18S rRNA gene metabarcoding and qPCR) approach complemented with toxin analysis was applied at 41 stations in the northwestern part of the Black Sea for better taxonomic coverage and toxin profiling in natural populations. The combined dataset included 20 potentially toxic species, some of which (Dinophysis acuminata, Dinophysis acuta, Gonyaulax spinifera, and Karlodinium veneficum) were detected in over 95% of the stations. In parallel, pectenotoxins (PTX-2 as a major toxin) were registered in all samples, and yessotoxins were present at most of the sampling points. PTX-1 and PTX-13, as well as some YTX variants, were recorded for the first time in the basin. A positive correlation was found between the cell abundance of Dinophysis acuta and pectenotoxins, and between Lingulodinium polyedra and Protoceratium reticulatum and yessotoxins. Toxic microalgae and toxin variant abundance and spatial distribution was associated with environmental parameters. Despite the low levels of the identified phycotoxins and their low oral toxicity, chronic toxic exposure could represent an ecosystem and human health hazard.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

New Knowledge on Distribution and Abundance of Toxic Microalgal Species and Related Toxins in the Northwestern Black Sea

Dzhembekova

Moncheva

Slabakova

et al. 2022

Toxins

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“…Some of these Dinophysiales and Prorocentrales produce toxins which cause harm to human and animals. The major vectors for these toxins are shellfish (Costa 2016, Likumahua et al, 2020. The shellfish consumption when contaminated elicit five different types of syndromes namely, Paralytic Shellfish Poisoning (PSP), Diarrhoetic Shellfish Poisoning (DSP), Neurotoxic Shellfish Poisoning (NSP), Amnesic Shellfish Poisoning (ASP), and Azaspiracid Shellfish Poisoning (AZP).…”

Section: Introductionmentioning

confidence: 99%

“…DSP results from the proliferation of Gymnodinium spp. They produce diarrhetic shellfish toxins (DSTs) such as okadaic acid (OA) and dinophysistoxins (DTXs) as well as pectenotoxins (PTXs) as secondary metabolites, which accumulate in filter feeders, resulting in human poisoning and symptoms of nausea, vomiting, diarrhea, chills and abdominal pain (Li et al, 2014, Hu et al, 2017, Likumahua et al , 2020 ). DSP symptoms include nausea, vomiting, diarrhea, chills and abdominal pain (James et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

study of Dinophysiales and Prorocentrales of Atlantic Ocean, Gulf of Guinea, Nigeria

M.O,

J.U

2023

IJRIAS

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This study examined the taxonomy, spatial and seasonal occurrences of the Orders Dinophysiales and Prorocentrales in the Atlantic Ocean, from the Bight of Benin to the Bight of Bonny in Gulf of Guinea Nigeria. Samples were collected from Oceanic stations in ten (10) locations drawn from the eight (8) coastal states of Nigeria. Six (6) species of Dinophysiales and 11 species of Prorocentrales were found. Whereas the Prorocentrales comprised exclusively of Prorocentrum species, Dinophysiales consisted of species of Dinophysis (2), Ornitocercus (2), Plalacroma (1) and Ceratocorys (1). The species exhibited differential spatial and temporal variations. Spatially, the distribution of Dinophysiales was generally relatively scanty, with most widely distributed being D. caudata, while D. rotundata and Amphisolenia schauinslandii were rare, while Prorocentrales had a wider distribution with Prorocentrum gracile and Prorocentrum micans as cosmopolitan species and Prorocentrum aporum, P. balticum, P.compressum P. obtusum, P. scutellum and P. rhathymum as restricted species. In terms of seasonal occurrence, D. caudata (Dinophysiales), P. gracile, P. triestinum and P. micans (Prorocentrales) were found at all seasons- dry-wet, wet, wet-dry and dry while D. rotundatum occurred only in the wet season. P. balticum and P. compressum, occurred only in the wet, dry-wet and dry season respectively. Species that were extremely sparse, both spatially and seasonally, were Phalacroma hastatum, Prorocentrum aporum, P. balticum, P. lima and P. compressum. Global distribution of the identified species is also presented. A total of 47.6% of the collection of species identified in this study are known to be toxic and harmful such as Dinophysis caudata, D. rotundata Prorocentrum micans, P. emaginatum, P. lima. P.redfieldii, P.reticulatum and P. rhathymum.

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“…12 m; see Figure 1a) [1,2,3,4]. Due to its unique geomorphologic-topographic aspect, Ambon Bay has been of great general interest to oceanographic studies [1,2,3,4,5,6,7,8]. In particular to the sill of Ambon Bay, the location has attracted many researchers regarding its narrow, shallow aspect, behaving as a constriction of IAB and thus, the sill can create energetic hydrodynamics [6,9] and a two-layer circulation system, called estuarine circulation similarly found in partly-mixed estuaries [1,10,11].…”

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confidence: 99%

Secondary estuarine circulation and the related vertical mixing at the sill of Ambon Bay, eastern Indonesia

Giliant Salamena

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Secondary estuarine circulation at the sill of Ambon Bay during wet season (July 2019) was investigated to add important insights into the existing knowledge on primary estuarine circulation done by a recent study. The datasets from the previous study were employed to calculate tidal-mean vertical advection as secondary estuarine circulation at the sill. Vertical mixing at the sill was also quantified using the continuity equation. The vertical profiles of vertical advection at the sill of Ambon Bay formed bow-like shapes with zero value at the surface that increased to reach maximum at the mid-depth of the sill (∼6 m depth), subsequently decreasing to zero at the seabed. Vertical advection at the sill was found to be larger during spring tide (∼2.5 × 10−3 m/s) than during neap tide (∼1 × 10−3 m/s). Vertical diffusivity, indicating the magnitude of vertical mixing at the sill of Ambon Bay, showed similar characteristics to vertical advection in terms of vertical profiles (bow-like shapes) and spring/neap tidal variation (spring tide value: 8.5 × 10−3 m2/s; neap tide value: ∼5 × 10−3 m2/s). The intense vertical mixing at the sill of Ambon Bay has the potential to create turbid water linked to resuspension of seabed sediment in the location.

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Variability of dinoflagellates and their associated toxins in relation with environmental drivers in Ambon Bay, eastern Indonesia

Cited by 11 publications

References 62 publications

New Knowledge on Distribution and Abundance of Toxic Microalgal Species and Related Toxins in the Northwestern Black Sea

New Knowledge on Distribution and Abundance of Toxic Microalgal Species and Related Toxins in the Northwestern Black Sea

study of Dinophysiales and Prorocentrales of Atlantic Ocean, Gulf of Guinea, Nigeria

Secondary estuarine circulation and the related vertical mixing at the sill of Ambon Bay, eastern Indonesia

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