Occurrence of epibenthic dinoflagellates in relation to biotic substrates and to environmental factors in Southern Mediterranean (Bizerte Bay and Lagoon, Tunisia): An emphasis on the harmful Ostreopsis spp., Prorocentrum lima and Coolia monotis

Gharbia, Héla Ben; Laabir, Mohamed; Mhamed, Abdelouahed Ben; Gueroun, Sonia K. M.; Yahia, Mohamed Néjib Daly; Nouri, Habiba; M’Rabet, Charaf; Shili, Abdessalem; Yahia, Ons Kéfi–Daly

doi:10.1016/j.hal.2019.101704

Cited by 19 publications

(13 citation statements)

References 105 publications

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“…Tester et al (2014) first used artificial substrates (fiberglass screen) to investigate the abundance of benthic dinoflagellates, which attaches great importance to the use of cells (100 cm 2 ) -1 in filed studies. However, this method is not applicable to some studies that explore the relationships (e.g., substrate preferences) between benthic cells and hosts (Boisnoir et al, 2019;Gharbia et al, 2019). In the present study, a field method was established to quantify the densities of epipelic dinoflagellates.…”

Section: Quantitative Methodology For Benthic Dinoflagellatesmentioning

confidence: 99%

“…Considering the threat of toxic benthic Prorocentrum to marine benthos and humans, ecological studies related to blooms, including the spatial-temporal dynamics of their distribution and relationships with environmental parameters, should be clarified. Significant spatial and temporal distributions of benthic Prorocentrum have been observed, and these distributions are often related to environmental factors including temperature, nutrients, and depth (Glibert et al, 2012;Hachani et al, 2018;Gharbia et al, 2019). Distinct seasonal distribution characteristics are also observed in benthic Prorocentrum (mainly P. concavum and P. lima), with a high abundance in the wet season (Tindall and Morton, 1998).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Benthic dinoflagellates can live and/or attach to the surface of seagrass, macroalgae, and sediment based on their flagellates or mucus (García-Portela et al, 2016), and they can also swim in the water column (Gharbia et al, 2019;Zou et al, 2020). Many previous studies have revealed substrate preferences of benthic Prorocentrum (Boisnoir et al, 2019;Gharbia et al, 2019). However, a number of reports found that the three-dimensional architecture of hosts can affect the attachment of benthic dinoflagellates, and those substrates with flexible and complex structures are most suitable (Accoroni and Totti, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Spatial-Temporal Distribution of Prorocentrum concavum Population in Relation to Environmental Factors in Xincun Bay, a Tropical Coastal Lagoon in China

et al. 2022

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A harmful benthic Prorocentrum concavum bloom was recorded in August 2018 in Xincun Bay, China, which is the location of a national seagrass nature reserve. Annual ecological surveys have been conducted to study the population dynamics of P. concavum in the benthic community and water column. Seasonal variations in benthic P. concavum abundance were found and the abundances on seagrass and macroalgae in the wet season were 2.5 and 2.82 times higher, respectively, than those in the dry season, although the differences were not statistically significant. The abundance of P. concavum in the water column differed significantly between seasons. The maximum abundances of benthic and planktonic P. concavum were (1.7 ± 0.59) × 106 cells (100 cm2)−1 on Thalassia hemperichii in July and 2.0 × 104 ± 4.7 × 103 cells L−1 in June, respectively. High spatial heterogeneity in P. concavum abundance was observed among five sampling sites. Abundances were significantly higher in seagrass beds than those in macroalgae beds, mangroves, and coral reefs. The abundance of P. concavum at site A (in a seagrass bed and close to a cage-culture area) was 5.6 times higher than that at site D (seagrass bed and distant from the cage-culture area). Planktonic P. concavum showed a similar spatial distribution and presented a maximum density at site A. Moreover, the abundance of benthic P. concavum also showed heterogeneity on host substrates, and the abundance on T. hemperichii was significantly higher than that on sediment. Based on a Spearman’s test, temperature, dissolved organic phosphorus, and dissolved organic nitrogen were the three important factors driving the spatiotemporal distribution of benthic P. concavum in Xincun Bay. Planktonic P. concavum were derived from cells on the substrates and were influenced by concentrations of dissolved oxygen. In conclusion, seagrass beds may be a reservoir of harmful benthic algal blooms in Xincun Bay and the dense cage-culture area provides sufficient organic nutrients for the growth and reproduction of benthic dinoflagellates.

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Section: Quantitative Methodology For Benthic Dinoflagellatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial-Temporal Distribution of Prorocentrum concavum Population in Relation to Environmental Factors in Xincun Bay, a Tropical Coastal Lagoon in China

et al. 2022

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“…However, in the last 20 years, harmful events associated with epiphytic/benthic dinoflagellates (BHABs) have been increasingly reported in different parts of the Mediterranean Sea (Ben Gharbia et al, 2019). A number of studies Aligizaki & Nikolaidis, 2006;Ben Gharbia et al, 2016;Masó & Garcés, 2006) demonstrated that the benthic genera Coolia, Prorocentrum, and Ostreopsis contain species which can produce different toxins with multiple contamination pathways.…”

Section: Introductionmentioning

confidence: 99%

Multiannual trends of toxic and potentially toxic microalgae (Ostreopsis cf. ovata, Prorocentrum lima, and Coolia monotis) in Sfax coasts (North of Gabes Gulf, Tunisia)

et al. 2021

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During the last decades, microalgae communities have presented significant changes in their structure and taxa composition along the Mediterranean littoral shallow waters. Despite numerous studies conducted to characterize these changes at various levels, it has always been very difficult to disentangle the effects of physicochemical factors from the meteorological ones. The main purpose of this work was to evaluate possible changes, over a 17-year scale (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013), in diversity and abundance of three toxic and potentially toxic microalgae related to changes in environmental parameters on Sfax coasts, a pole of shellfish production in Tunisia. In this 17-year span, a chronological series of data showed that a clear disparity from one year to another was observed in the abundance of studied species. The distribution of these species has been subjected to a seasonal cycle. The studied microalgae, especially Prorocentrum lima, seem to have significant relationships with many physicochemical and meteorological parameters.

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Biodiversity and distribution of benthic dinoflagellates in tropical Zhongsha Islands, South China Sea

et al. 2022

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Occurrence of epibenthic dinoflagellates in relation to biotic substrates and to environmental factors in Southern Mediterranean (Bizerte Bay and Lagoon, Tunisia): An emphasis on the harmful Ostreopsis spp., Prorocentrum lima and Coolia monotis

Cited by 19 publications

References 105 publications

Spatial-Temporal Distribution of Prorocentrum concavum Population in Relation to Environmental Factors in Xincun Bay, a Tropical Coastal Lagoon in China

Spatial-Temporal Distribution of Prorocentrum concavum Population in Relation to Environmental Factors in Xincun Bay, a Tropical Coastal Lagoon in China

Multiannual trends of toxic and potentially toxic microalgae (Ostreopsis cf. ovata, Prorocentrum lima, and Coolia monotis) in Sfax coasts (North of Gabes Gulf, Tunisia)

Biodiversity and distribution of benthic dinoflagellates in tropical Zhongsha Islands, South China Sea

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