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

Carvalho, Melissa; Gianesella, Sônia Maria Flores; Saldanha-Corrêa, Flávia Marisa Prado

doi:10.1590/s1679-87592008000400006

Cited by 24 publications

(19 citation statements)

References 20 publications

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“…In contrast, during the JC32 cruise, significant Trichodesmium populations and associated community N 2 fixation rates were observed within the core of the Brazil current, adjacent to the continental shelf on the far western edge of the SASG. On‐shelf blooms of Trichodesmium have also been reported in this region [ Carvalho et al , ]. Moreover, enhanced rates of community N 2 fixation were directly observed in the upper water column during the north‐southwest crossing of the western side of the SASG during AMT21 (Figure d).…”

Section: Resultssupporting

confidence: 56%

Environmental controls on the biogeography of diazotrophy and Trichodesmium in the Atlantic Ocean

Snow

Schlösser

Woodward

et al. 2015

Global Biogeochemical Cycles

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The cyanobacterium Trichodesmium is responsible for a significant proportion of the annual "new" nitrogen introduced into the global ocean. Despite being arguably the best studied marine diazotroph, the factors controlling the distribution and growth of Trichodesmium remain a subject of debate, with sea surface temperature, the partial pressure of CO 2 , and nutrients including iron (Fe) and phosphorus (P), all suggested to be important. Synthesizing data from seven cruises collectively spanning large temporal and spatial scales across the Atlantic Ocean, including two previously unreported studies crossing the largely undersampled South Atlantic gyre, we assessed the relationship between proposed environmental drivers and both community N 2 fixation rates and the distribution of Trichodesmium. Simple linear regression analysis would suggest no relationship between any of the sampled environmental variables and N 2 fixation rates. However, considering the concentrations of iron and phosphorus together within a simplified resource-ratio framework, illustrated using an idealized numerical model, indicates the combined effects these nutrients have on Trichodesmium and broader diazotroph biogeography, alongside the reciprocal maintenance of different biogeographic provinces of the (sub)tropical Atlantic in states of Fe or P oligotrophy by diazotrophy. The qualitative principles of the resource-ratio framework are argued to be consistent with both the previously described North-South Atlantic contrast in Trichodesmium abundance and the presence and consequence of a substantial non-Trichodesmium diazotrophic community in the western South Atlantic subtropical gyre. A comprehensive, observation-based explanation of the interactions between Trichodesmium and the wider diazotrophic community with iron and phosphorus in the Atlantic Ocean is thus revealed.

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Section: Resultssupporting

confidence: 56%

Environmental controls on the biogeography of diazotrophy and Trichodesmium in the Atlantic Ocean

Snow

Schlösser

Woodward

et al. 2015

Global Biogeochemical Cycles

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“…A amônia é usualmente o produto de muitos processos biológicos e a sua adição é devido a entrada no estuário através dos rios tributários e descargas de efluentes domésticos (MATEUS et al, 2008) Os teores de amônia estiveram maiores principalmente, no Ponto 2 onde foram considerados altos para as águas da plataforma continental, onde se esperaria concentrações bem mais baixas como observado por Carvalho et al (2008) na Baía de Santos e Plataforma adjacente com concentrações a baixo 1,00 μmol.L-¹. Já na Baía de Todos os Santos, Mafalda Jr. et al (2003), encontraram concentrações semelhantes a da área estudada enquanto Schettiini et al (2005) nas águas da Plataforma sob influência do rio Itajaí-Açu-SC e Azevedo et al (2008) no Golfão Maranhense, encontram concentrações bem mais elevadas.…”

Section: Cordeiro Isisunclassified

Distribuição sazonal e espacial da clorofila a e variáveis ambientais na plataforma continental de Pernambuco (Porto do Recife), Brasil

Cordeiro¹,

Feitosa²,

Montes³

et al. 2014

TropOcean

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O estudo foi desenvolvido na Plataforma Continental de Pernambuco (Porto do Recife) objetivando avaliar a influência da pluma do rio Capibaribe na distribuição sazonal e espacial da clorofila a e variáveis ambientais. As coletas de água foram realizadas na superfície em baixa-mar, com garrafa de Niskin, em 4 pontos fixos, no período de estiagem (nov/10, fev e set/11) e chuvoso (mar, mai e jul/11). As variáveis ambientais analisadas foram pluviosidade, profundidade, transparência, temperatura, salinidade, oxigênio dissolvido e taxa de saturação, DBO, MPS, pH, amônia, nitrito, nitrato, fosfato, silicato e clorofila a. A pluviosidade variou de 23,5 a 755,7 mm, a transparência de 0,6 a 6 m; a temperatura de 26 a 30 ºC; a salinidade 12,65 a 36,36; DO de 2,99 a 5,02 ml/L-¹; MPS de ,4 mg.L-¹ a 55,6 mg.L-¹; pH de 7,31 a 8,45; a amônia de 0 a 8,97 μmol.L-¹; o nitrito de 0 a 4,47 μmol.L-¹; o nitrato de 0 a 15,82 μmol.L-¹; o fosfato 0,1 a 6,36 μmol.L-¹; o silicato de 1 a 113,6 μmol.L-¹; e a clorofila a de 0,24 a 19,29 mg.m-³. De acordo com a ACP a pluviosidade foi a forçante física que mais interferiu no sistema mostrando alta correlação direta com nitrito, nitrato e silicato e inversa com a transparência, temperatura, salinidade, OD, DBO, MPS e pH. A clorofila a esteve diretamente correlacionada com a amônia, o fosfato e a profundidade. A pluma do rio Capibaribe teve capacidade de influenciar toda área estudada nos meses de maior pluviosidade. Palavras chave: Fitoplâncton; Biomassa; Zona costeira; Hidrologia.

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

Cited by 24 publications

References 20 publications

Environmental controls on the biogeography of diazotrophy and Trichodesmium in the Atlantic Ocean

Environmental controls on the biogeography of diazotrophy and Trichodesmium in the Atlantic Ocean

Distribuição sazonal e espacial da clorofila a e variáveis ambientais na plataforma continental de Pernambuco (Porto do Recife), Brasil

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

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