Offshore distribution patterns of the cyanobacterium Trichodesmium erythraeum ehrenberg and associated phyto- and bacterioplankton in the southern Atlantic coast (Paraná, Brazil)

Siqueira, Adriana; Kolm, Hedda Elisabeth; Brandini, Frederico Pereira

doi:10.1590/s1516-89132006000300018

Cited by 22 publications

(14 citation statements)

References 15 publications

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“…Otherwise, the increase in the reports of T. erithraeum blooms off the Brazilian southeastern coast is noteworthy: Moraes (1986), Gianesella-Galvão et al (1995), Fonseca et al (2002, unpublished), CETESB (2005, unpublished), Siqueira et al (2006), as also in this paper.…”

supporting

confidence: 70%

“…Several authors affirm that atmospheric and calm sea conditions are essential for the development of Trichodesmium blooms (LEWIS et al, 1988;GIANESELLA-GALVÃO et al, 1995;SARANGI et al, 2004, SIQUEIRA et al, 2006. The calm weather observed during the bloom and the absence of winds corroborate Bryceson and Fay´s (1981) and Carpenter´s (1983) hypothesis regarding bloom formation.…”

mentioning

confidence: 72%

“…When T. erythraeum bundles were observed an estimate of the number of filaments per bundle was made. According to Smayda (1997), the definition of a bloom is subjective. Thus the following criterion was applied: when the relative frequency of T. erythraeum filaments represented more than 50% of the total cell number present in the sample, the sampling station was considered to be inside the bloom.…”

mentioning

confidence: 99%

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Trichodesmium erythraeum Bloom on the Continental Shelf off Santos, Southeast Brazil

2008

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supporting

confidence: 70%

mentioning

confidence: 72%

mentioning

confidence: 99%

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Trichodesmium erythraeum Bloom on the Continental Shelf off Santos, Southeast Brazil

2008

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“…Bloom events by Trichodesmium are often associated with highly stratified waters (Gianesella-Galvao et al 1995;Siqueira et al 2006) and low inorganic nutrient availability (Capone and Carpenter 1982), conditions that were mimicked in our laboratory study. The pattern and rate in the buildup of biomass (Fig.…”

Section: Discussionmentioning

confidence: 55%

Calcium carbonate precipitation induced by the growth of the marine cyanobacteria Trichodesmium

Kranz

Wolf-Gladrow

Nehrke

et al. 2010

Limnology & Oceanography

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In this laboratory study, we monitored the buildup of biomass and concomitant shift in seawater carbonate chemistry over the course of a Trichodesmium bloom under different phosphorus (P) availability. During exponential growth, dissolved inorganic carbon (DIC) decreased, while pH increased until maximum cell densities were reached. Once P became depleted, DIC decreased even further and total alkalinity (TA) dropped, accompanied by precipitation of aragonite. Under P-replete conditions, DIC increased and TA remained constant in the postbloom phase. A diffusion-reaction model was employed to estimate changes in carbonate chemistry of the diffusive boundary layer. This study demonstrates that Trichodesmium can induce precipitation of aragonite from seawater and further provides possible explanations about underlying mechanisms.

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“…It occurs along the coast of Rio Grande do Sul, Santa Catarina (4), Paraná (7,8) and São Paulo (9)(10)(11). The study by Satô, Paranaguá and Eskinazi (5) is one of the most frequently cited papers on this topic and reports blooms off the coastal area of Recife, in northeastern Brazil.…”

Section: Introductionmentioning

confidence: 99%

Screening the toxicity and toxin content of blooms of the cyanobacterium Trichodesmium erythraeum (Ehrenberg) in northeast Brasil

Proença¹,

Tamanaha²,

Fonseca³

2009

J. Venom. Anim. Toxins incl. Trop. Dis

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ABSTRACT:Blooms of the cyanobacterium Trichodesmium occur in massive colored patches over large areas of tropical and subtropical oceans. Recently, the interest in such events has increased given their role in major nitrogen and carbon dioxide oceanic fluxes. Trichodesmium occurs all along the Brazilian coast and patches frequently migrate towards the coast. In this paper we screen the toxicity and toxin content of Trichodesmium blooms off the coast of Bahia state. Four samples, collected from February to April 2007, were analyzed. Organisms were identified and assessed for toxicity by means of several methods. Analogues of microcystins, cylindrospermopsins and saxitoxins were analyzed using HPLC. Microcystins were also assayed through ELISA. Results showed dominance of T. erythraeum, which makes up as much as 99% of cell counts. Other organisms found in smaller quantities include the dinoflagellates Prorocentrum minimum and P. rhathymum. Extracts from all samples delayed or interrupted sea urchin larval development, but presented no acute toxicity during a mouse bioassay. Saxitoxin congeners and microcystins were present at low concentrations in all samples, occurrences that had not previously been reported in the literature. Despite our finding of saxitoxin analogues and microcystins in Trichodesmium blooms, these toxins do not represent a potential harm to human health by primary contact. We conclude, based on our results and those reported in the recent literature, which differ from results published in 1963, that although toxins are present, there is no evidence that T. erythraeum blooms represent a threat to humans.

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Offshore distribution patterns of the cyanobacterium Trichodesmium erythraeum ehrenberg and associated phyto- and bacterioplankton in the southern Atlantic coast (Paraná, Brazil)

Abstract: Studies were carried out on Thrichodesmium erythraeum occurring on the inner shelf in the state of Paraná,Brazil. Temperature, salinity, rainfall, wind velocity, total bacteria, bacterial biomass, chlorophyll-a, phytoplankton

Cited by 22 publications

References 15 publications

Trichodesmium erythraeum Bloom on the Continental Shelf off Santos, Southeast Brazil

Trichodesmium erythraeum Bloom on the Continental Shelf off Santos, Southeast Brazil

Calcium carbonate precipitation induced by the growth of the marine cyanobacteria Trichodesmium

Screening the toxicity and toxin content of blooms of the cyanobacterium Trichodesmium erythraeum (Ehrenberg) in northeast Brasil

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