Bloom of the marine diazotrophic cyanobacterium Trichodesmium erythraeum in the Northwest African Upwelling

Ramos, Antonio G.; Martel, A. Conde; Codd, Geoffrey A.; Soler, Emilio Carlos López; Coca, Josep; Redondo, Alexandre; Morrison, Louise F.; Metcalf, James S.; Ojeda, Antonio A. Ramón; Suárez, Sonia; Petit, M.

doi:10.3354/meps301303

Cited by 69 publications

(41 citation statements)

References 7 publications

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“…In terms of the Cyanobacteria-like sequences that were detected, both Trichodesmium and Lyngbya spp. have been reported to occur in blooms in coastal environments, including in corals, during the warmest seasons (O'Neil and Dennison, 2005;Paul et al, 2005;Ramos et al, 2005;Hewson et al, 2007;O'Neil and Capone, 2008;Paerl and Huisman, 2008). The results reported here highlight the importance of certain diazotroph groups in corals and their proliferation under high-temperature stress conditions.…”

Section: Discussionsupporting

confidence: 55%

Climate change affects key nitrogen-fixing bacterial populations on coral reefs

Santos

Carmo

Duarte³

et al. 2014

The ISME Journal

124

111

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Coral reefs are at serious risk due to events associated with global climate change. Elevated ocean temperatures have unpredictable consequences for the ocean's biogeochemical cycles. The nitrogen cycle is driven by complex microbial transformations, including nitrogen fixation. This study investigated the effects of increased seawater temperature on bacteria able to fix nitrogen (diazotrophs) that live in association with the mussid coral Mussismilia harttii. Consistent increases in diazotroph abundances and diversities were found at increased temperatures. Moreover, gradual shifts in the dominance of particular diazotroph populations occurred as temperature increased, indicating a potential future scenario of climate change. The temperature-sensitive diazotrophs may provide useful bioindicators of the effects of thermal stress on coral reef health, allowing the impact of thermal anomalies to be monitored. In addition, our findings support the development of research on different strategies to improve the fitness of corals during events of thermal stress, such as augmentation with specific diazotrophs.

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Section: Discussionsupporting

confidence: 55%

Climate change affects key nitrogen-fixing bacterial populations on coral reefs

Santos

Carmo

Duarte³

et al. 2014

The ISME Journal

124

111

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“…toxicity are available, related to more than one compound. Ramos et al [16] found 0.1-1 µg g -1 microcystins (MCs) in a bloom of Trichodesmium erythraeum, which was recorded for the first time in 2004 in the Canary Islands Archipelago, during the warmest period recorded since 1912. Samples from a Trichodesmium erythraeum bloom off the Brazilian coast were analyzed for MCs, saxitoxins analogues and cylindrospermopsin [17].…”

Section: Marine Planktonic Cyanobacteriamentioning

confidence: 99%

Emerging health issues of cyanobacterial blooms

Manganelli

Scardala

Stefanelli

et al. 2012

Annali Dell'Istituto Superiore Di Sanità

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Abstract. This paper describes emerging issue related to cyanobacterial dynamics and toxicity and human health risks. Data show an increasing cyanobacteria expansion and dominance in many environments. However there are still few information on the toxic species fitness, or on the effects of specific drivers on toxin production. Open research fields are related to new exposure scenario (cyanotoxins in water used for haemodialysis and in food supplements); to new patterns of co-exposure between cyanotoxins and algal toxins and/or anthropogenic chemicals; to dynamics affecting toxicity and production of different cyanotoxin variants under environmental stress; to the accumulation of cyanotoxins in the food web. In addition, many data gaps exist in the characterization of the toxicological profiles, especially about long term effects.

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“…Nevertheless, highfrequency sampling in the Sainte Marie Bay shows that increase in the T. erythraeum population is often consecutive to dissolved combined nitrogen (NO 3 − ) pulses with a 3-7 day time lag [45]. Accumulations of T. erythraeum are also frequent in the lagoon of the Australian Great Barrier Reef [42] and other coastal regions (i.e, Brazil, [46]; India [47], Canary Island [48]). The population decay can provide readily available organic material for the other phytoplankton components and coral reef.…”

Section: Natural and Anthropogenic Eutrophicationmentioning

confidence: 99%

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

Neveux

Tenório

Jacquet

et al. 2009

International Journal of Oceanography

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Recommended by Robert FrouinSpatio-temporal variations of chlorophylls and phycoerythrins, inferred by spectrofluorometric methods, were studied from April 2002 to June 2003 in the southwest lagoon and oceanic waters of New Caledonia. Trade winds blew 75% of the time and appeared as the main factor influencing surface Tchla (sum of monovinyl-and divinyl-chlorophyll a) variations in the ocean, near the barrier reef. Lagoon and oceanic waters differed in the composition of picoplanktonic cyanobacteria with a relative dominance of Prochlorococcus and high-phycourobilin Synechococcus in the ocean, and a relative dominance of high-phycoerythrobilin Synechococcus in the lagoon. Main pigment variations in the lagoon were associated with cyclone Erica in March 2003 and showed a 5-6 fold Tchla increase around Nouméa. The cyclone stimulated mainly diatom growth as indicated by the high chlorophyll (c 1 + c 2 )/chlorophyll a ratio and by the lowest values for the other pigment ratios. The relative importance of divinyl-chlorophyll a concentration and fluorescence excitation spectra of phycoerythrins appeared as useful tools for characterizing lagoon-ocean exchanges.

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Bloom of the marine diazotrophic cyanobacterium Trichodesmium erythraeum in the Northwest African Upwelling

Cited by 69 publications

References 7 publications

Climate change affects key nitrogen-fixing bacterial populations on coral reefs

Climate change affects key nitrogen-fixing bacterial populations on coral reefs

Emerging health issues of cyanobacterial blooms

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

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