New record of Trichodesmium thiebautii Gomont ex Gomont (Oscillatoriales - Cyanophyta) for the continental shelf of northeastern Brazil

Monteiro, José Juarez Ferreira; Leça, Enide Eskinazi; Koening, Maria Luise; Macêdo, Sílvio José de

doi:10.1590/s0102-33062010000400027

Cited by 6 publications

(6 citation statements)

References 9 publications

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“…Hence, the prevalence of the Cyanobacteria Trichodesmium can be understood. It is a diazotrophic organism that has been well documented both in the marine waters of Brazil (Satô et al 1963, Brandini et al 1997, Carvalho et al 2008, Proença et al 2009, Monteiro et al 2010) and worldwide (Sellner 1997, Janson et al 1999.…”

Section: Discussionmentioning

confidence: 99%

The composition and new records of micro- and mesophytoplankton near the Vitória-Trindade Seamount Chain

Lubiana

Júnior

2016

Biota Neotrop.

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In spite of the length of the Brazilian coastline, studies of marine phytoplankton species in offshore areas have been largely neglected. Regarding phytoplankton species composition, the aim was to assess biodiversity status, species frequency, and the similarities at different sites along the Vitoria-Trindade Seamount Chain. Phytoplankton net samples were analyzed. One hundred and seventy five infrageneric taxa were identified. They represented four phyla, viz., Cyanobacteria, Bacillariophyta, Dinophyta, and Ochrophyta. Dinophyta was the most diverse, and its genus Tripos the largest contributor. This genus also represented more than half of the most common taxa in the sampled area. Thirty-five new infrageneric taxa were recorded, 12 of which are new reports for Brazil. Neritic stations assemblages were markedly different from those of seamounts and deep offshore. The high species diversity, especially among dinoflagellates can be considered typical of tropical oligotrophic waters. The new records demonstrate the gap in knowledge of phytoplankton biodiversity in Brazil.

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Section: Discussionmentioning

confidence: 99%

The composition and new records of micro- and mesophytoplankton near the Vitória-Trindade Seamount Chain

Lubiana

Júnior

2016

Biota Neotrop.

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“…According to Monteiro et al (2010), in Pernambuco's continental shelf, T. thiebautii is a frequent species that occurs in colonies in bunches, or rarely in bundles, with straight, cylindrical trichomes, ranging in length between 110 and 2,110 µm, with square or slightly longer cells, measuring 5-10 μm in width and 3-15 μm in height. According to the authors, more robust colonies, with a greater number of trichomes, up to 100 trichomes/colony, are found during the dry season and in areas furthest from the coast, free of any influence from the continent.…”

Section: Discussionmentioning

confidence: 99%

“…The occurrence of T. thiebautii was reported along the southern coast of Brazil, where there are growths with toxic connotations as seen in bioassays with mollusks (Rörig et al 1998) and, recently, in the northeastern waters of Brazil (Monteiro et al 2010). …”

Section: Introductionmentioning

confidence: 98%

Distribution and annual variation of Trichodesmium thiebautii Gomont ex Gomont (Oscillatoriales - Cyanophyta) in tropical waters of Northeastern Brazil (Western Atlantic)

Monteiro¹,

Eskinazi-Leça²,

Koening³

et al. 2012

TropOcean

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Studies about Trichodesmium thiebautii Gomont ex Gomont and the relations of its spatial and temporal distribution with the hydrological conditions were developed in the continental shelf of the coast of Pernambuco, Brazil. The samples were collected during the rainy (July 2005) and the dry (November 2006) seasons, on the surface and bottom, at six sampling points, distributed along two profiles perpendicular to the coast of Gaibú and Serrambi beaches. The collection points were approximately 5, 10 and 20 miles from the coast, corresponding to the isobaths of 10, 20 and 30 meters. T. thiebautii occurred in bothl periods, with less density in areas closer to the coast and higher further from the coast. The correlation of T. thiebautii was positive with pH and dissolved oxygen during the rainy season and with salinity and dissolved oxygen during the dry season. No correlation was observed with the nutrient salts.

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“…The association between the harpacticoid Macrosetella gracilis and Trichodesmium colonies are thought to benefit the zooplankton, since trichomes were reported containing eggs and larvae attached, and served as food and substrate (Björnberg, 1965;O'Neil et al, 1996). Understanding the microbial community structure surrounding Trichodesmium aggregations is therefore an important key to understand its ecology and species interactions, especially in understudied regions such as the South Atlantic Ocean where the genus is often reported (Gianesella-Galvão, 1995;Rörig et al, 1998;Carvalho et al, 2008;Monteiro et al, 2010Monteiro et al, , 2012. Recent works from our group have identified colonies in the Southwest Atlantic Ocean associated with iron-rich dust particles (Bif and Yunes, 2017) and producing toxins (Detoni et al, 2016a); however, the association of these potentially toxic aggregations with other microbial communities was never assessed.…”

Section: Introductionmentioning

confidence: 99%

Microplankton Community Composition Associated With Toxic Trichodesmium Aggregations in the Southwest Atlantic Ocean

et al. 2019

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The spatial distribution and species identification of Trichodesmium was assessed during two fall cruises along the Southwest Atlantic Ocean shelf break. Organisms from the microplankton >50 µm were collected using a vertical plankton net for quantification and identification of the microplanktonic community associated with the genus. Additional sub-samples were filtered and prepared for quantification and discrimination of phycotoxins from the particulate matter using High Performance Liquid Chromatography. Physical parameters such as temperature, salinity, wind speed, and mixed layer depth were used in order to evaluate the environmental conditions at the time of sampling and correlate with Trichodesmium occurrence. Overall, Trichodesmium abundances were higher in the northernmost stations under wind speeds of <8 knots and shallow mixed layer depths <40 m. Besides frequent reports on the occurrence of T. erythraeum and T. thiebautii for this region, we identified three species as T. clevei, T. hildebrandtii, and T. radians. In the majority of stations where Trichodesmium was not the dominant organism, other microplanktonic groups were present such as centric diatoms and dinoflagellates. The toxin analysis was positive for saxitoxins predominantly when Trichodesmium was at high numbers of trichomes per liter in the stations; however, there was an inverse relationship between abundance of trichomes and toxin concentrations. Using information from the environmental variables and Trichodesmium abundance, we suggest that the toxin production might take place during the aggregation phase of trichomes at surface, and that saxitoxins could be inhibiting the growth of other microplanktonic organisms.

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New record of Trichodesmium thiebautii Gomont ex Gomont (Oscillatoriales - Cyanophyta) for the continental shelf of northeastern Brazil

Cited by 6 publications

References 9 publications

The composition and new records of micro- and mesophytoplankton near the Vitória-Trindade Seamount Chain

The composition and new records of micro- and mesophytoplankton near the Vitória-Trindade Seamount Chain

Distribution and annual variation of Trichodesmium thiebautii Gomont ex Gomont (Oscillatoriales - Cyanophyta) in tropical waters of Northeastern Brazil (Western Atlantic)

Microplankton Community Composition Associated With Toxic Trichodesmium Aggregations in the Southwest Atlantic Ocean

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