Effects of light intensity and light quality on growth and circadian rhythm of saxitoxins production in Cylindrospermopsis raciborskii (Cyanobacteria)

Carneiro, Ronaldo Leal; Santos, Maria Elisângela Venâncio dos; Pacheco, Amílcar; Azevedo, Sandra Maria Feliciano de Oliveira e

doi:10.1093/plankt/fbp006

Cited by 59 publications

(47 citation statements)

References 25 publications

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“…Light is required for production of many algal toxins, including PSPs, domoic acid, and DSP toxins (Proctor et al 1975, Bates et al 1991, Pan et al 1996a, Carneiro et al 2009, Tong et al 2011. Parkhill & Cembella (1999) and Etheridge & Roesler (2005) revealed that the highest cellular toxin levels in Alexandrium tamarense and A. fundyense were observed at light intensities between 100 and 150 µmol photons m −2 s −1…”

Section: Solar Irradiancementioning

confidence: 99%

Global change and the future of harmful algal blooms in the ocean

Fu¹,

Tatters²,

Hutchins³

2012

Mar. Ecol. Prog. Ser.

223

133

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The frequency and intensity of harmful algal blooms (HABs) and phytoplankton community shifts toward toxic species have increased worldwide. Although most research has focused on eutrophication as the cause of this trend, many other global-and regional-scale anthropogenic influences may also play a role. Ocean acidification (high pCO 2 /low pH), greenhouse warming, shifts in nutrient availability, ratios, and speciation, changing exposure to solar irradiance, and altered salinity all have the potential to profoundly affect the growth and toxicity of these phytoplankton. Except for ocean acidification, the effects of these individual factors on harmful algae have been studied extensively. In this review, we summarize our understanding of the influence of each of these single factors on the physiological properties of important marine HAB groups. We then examine the much more limited literature on how rising CO 2 together with these other concurrent environmental changes may affect these organisms, including what is possibly the most critical property of many species: toxin production. New work with several diatom and dinoflagellate species suggests that ocean acidification combined with nutrient limitation or temperature changes may dramatically increase the toxicity of some harmful groups. This observation underscores the need for more in-depth consideration of poorly understood interactions between multiple global change variables on HAB physiology and ecology. A key limitation of global change experiments is that they typically span only a few algal generations, making it difficult to predict whether they reflect likely future decadal-or century-scale trends. We conclude by calling for thoughtfully designed experiments and observations that include adequate consideration of complex multivariate interactive effects on the long-term responses of HABs to a rapidly changing future marine environment.

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Section: Solar Irradiancementioning

confidence: 99%

Global change and the future of harmful algal blooms in the ocean

Fu¹,

Tatters²,

Hutchins³

2012

Mar. Ecol. Prog. Ser.

223

133

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“…Dyble et al 2006;Carneiro et al 2009;Mehnert et al 2010;Marinho et al 2013); however, many aspects of this interaction have yet to be further elucidated. For instance, few investigations explored the isolated effects of light on the growth of strains from different latitudes, especially in subtropical and tropical environments (Briand et al 2004;Dyble et al 2006;Carneiro et al 2009;Piccini et al 2011;Bonilla et al 2012). This cyanobacterium is widespread in Brazilian freshwaters (Bouvy et al 2000;Sant'Anna & Azevedo 2000;Tonetta et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…This cyanobacterium is widespread in Brazilian freshwaters (Bouvy et al 2000;Sant'Anna & Azevedo 2000;Tonetta et al 2015). However, only a few Brazilian strains from Pernambuco state (Briand et al 2004;Marinho et al 2013), São Paulo (Carneiro et al 2009) and Minas Gerais were used for light experiments.…”

Section: Introductionmentioning

confidence: 99%

Morpho-physiological responses of a subtropical strain of Cylindrospermopsis raciborskii (Cyanobacteria) to different light intensities

2016

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Th e toxigenic cyanobacterium Cylindrospermopsis raciborskii previously restricted to tropical latitudes, has been increasingly reported in temperate lakes in recent decades. Th e causes of its biogeographical expansion are under investigation, but effi cient physiological adaptation to changes in temperature and light regimes are likely to be involved. Th e present study evaluated the morpho-physiological responses of a strain of C. raciborskii from southern Brazil to nine light intensities, from 9 to 250 μmol photons m -2 s -1 . Blooms of this cyanobacterium are regularly recorded in the region. Morpho-physiological responses were measured based on growth rate and trichome length. Cylindrospermopsis raciborskii showed slow growth at low light intensities, 9 and 20 μmol photons m -2 s -1, and responded morphologically by increasing the length of trichomes. In turn, the strain displayed constant maximum growth rates at light intensities higher than 50 μmol photons m -2 s -1. Th ese results support the hypothesis that C. raciborskii can survive under low light conditions and continue to produce viable trichomes. Moreover, the strain achieved high growth rates under a relatively wide range of light intensities, a physiological adaptation that can potentially be a competitive advantage in the phytoplankton community.

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“…Ha sido reportada en Canadá y Argentina (Kling et al, 1994;Otaño, 2009 kins et al, 1985;Carneiro et al, 2009). Otro caso reportado para C. raciborskii, la isla Palm en Australia, provocando la muerte de ganado bovino y enfermedades hepáticas en humanos, ya que produce espumas superficiales, mal olor y sabor en el agua (Jones y Sauter, 2005).…”

Section: Distribución En El Golfo Deunclassified