Considerations regarding the dominance of Cylindrospermopsis raciborskii under low light availability in a low phosphorus lake

Tonetta, Denise; Hennemann, Mariana Coutinho; Brentano, Débora Monteiro; Petrucio, Maurício Mello

doi:10.1590/0102-33062015abb0039

Cited by 11 publications

(4 citation statements)

References 40 publications

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“…This suggests that C. raciborskii is opportunistic with respect to dissolved inorganic phosphorus (Isvánovics et al, 2000). Both inorganic phosphorus and total phosphorus concentrations vary widely in aquatic environments dominated by C. raciborskii (Burford & Davis, 2011;Wu et al, 2012;Wojciechowski, 2013;Burford et al, 2016), and this ability can be important for the formation of akinetes (Antunes et al, 2015;Tonetta et al, 2015). Padisák (1997), Bai et al 2014and Antunes et al (2015) have observed that C. raciborskii, under conditions of limited environmental phosphate, displays high affinity absorption and an ability to store different sources of organic phosphorus in the cytoplasm in the form of polyphosphates to support their growth.…”

Section: Phosphorus Concentrationsmentioning

confidence: 99%

Autecology of Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju

2020

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Aim Cylindrospermopsis raciborskii (Woloszynska) Seenayya and Subba Raju, also called Raphidiopsis raciborskii, is a diazotrophic and filamentous cyanobacterium with terminal heterocytes, belonging to the order Nostocales. It has been the focus of several studies due to its toxicity and wide geographic distribution. Methods To understand its autecology and to identify the key factors that control its dominance, the present review discusses, based on recent publications, whether the expansion of this species is a result of a high metabolic plasticity or the existence of distinct ecotypes. Results Among the factors influencing C. raciborskii growth are its ability to survive in wide temperature, light intensity and pH ranges; to dominate in both stratified and mixed environments; to tolerate oligohaline conditions; to produce and secrete allelopathic substances; suffer little herbivore pressure; and although associated with a eutrophic environment, to tolerate low concentration of phosphorus and nitrogen with a high affinity for ammonia. Conclusions Due to these differences in the environmental conditions of growth and development found in various studies, we suggest the existence of different ecotypes that will predominate under specific environmental conditions as the most appropriate hypothesis.

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Section: Phosphorus Concentrationsmentioning

confidence: 99%

Autecology of Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju

2020

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“…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). 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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“…Island, Brazil) has also reported that cyanobacteria can dominate even in low nutrient conditions for long periods (Tonetta et al, 2015). This can be due to other factors such as light conditions and morphology of lakes (Dokulil and Teubner, 2000).…”

Section: Limnological Characteristics and Their Controlling Factorsmentioning

confidence: 97%

Limnological characteristics and planktonic diversity of five tropical upland lakes from Brazilian Amazon

Sahoo

Guimarães

Souza-Filho

et al. 2017

Ann. Limnol. - Int. J. Lim.

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A limnological investigation involving physical, chemical and biological aspects was undertaken in five tropical upland lakes (Violão À Vl, Amendoim À Am, and Três Irmãs À TI1, TI2 and TI3) from Serra dos Carajás, Brazil. Results show that these lakes are shallow, weakly stratified, and of polymictic type. These characteristics may have caused vertical mixing of limnological parameters. Seasonal changes were minor for most parameters, except for chlorophyll-a (Chl-a) and cyanobacteria, which also showed considerable variation between lakes. In general, waters of these lakes were mostly acidic in nature (avg. pH 4.9-5.9), with high total Fe (up to 1.52 mg/L) and low electrolytic conductivity (avg. 8.13-14 mS/cm) and total phosphorus (TP) (avg. 10-35.5 mg/L). Although the water bodies have good quality and classified as class I and II types according to CONAMA Resolution No. 357/05, trophic state index (TSI) varies from ultra-oligotrophic to eutrophic state, with higher trophic state observed for Vl, TI1 and TI2. Limnological characteristics of these lakes is highly influenced by lithological and morphological parameters. Principal component analysis (PCA) reveals that Chl-a and cyanobacteria are not solely influenced by TP and lower concentrations of all these parameters in Am lake are probably due to specificities of its catchment lithology. Phytoplankton taxa in the lakes are characterized by small chroococcales groups and desmids together with filamentous algae, more commonly observed in the dry season. The zooplankton community in the lakes is mainly dominated by rotifers, followed by cladocerans and copepods. Regarding species richness, zooplankton was highest in Vl, while phytoplankton is highest in TI1, and this aspect is most likely related to lake water levels.

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Considerations regarding the dominance of Cylindrospermopsis raciborskii under low light availability in a low phosphorus lake

Cited by 11 publications

References 40 publications

Autecology of Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju

Autecology of Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju

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

Limnological characteristics and planktonic diversity of five tropical upland lakes from Brazilian Amazon

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