Effects of <i>Cylindrospermopsis raciborskii</i> (cyanobacteria) on the swimming behavior of <i>Daphnia</i> (cladocera)

Ferrão-Filho, Aloysio da Silva; Soares, Maria Carolina S.; Lima, Ramon S.; Magalhães, Valéria Freitas de

doi:10.1002/etc.2420

Cited by 32 publications

(15 citation statements)

References 41 publications

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“…The paralysis effect observed in D. similis and M. micrura in the acute assays with single exposures to the CYRF strain is in agreement with previous studies using the same cladoceran species and has been attributed to the presence of saxitoxins in this strain . Nevertheless, by using living cells and not pure toxins, effects of compounds other than microcystins and saxitoxins cannot be ruled out.…”

Section: Discussionsupporting

confidence: 91%

“…Contrary to the studies of Ferrão-Filho et al [10,11], Soares et al [20] attributed these effects not to toxicity, but to low nutritional value and interference with feeding, leading to energy limitations. In the present study, we did find positive clearance rates in all diets, although they were lower in cyanobacteria than in green algae in both single and mixture treatments.…”

Section: Cyrfmentioning

confidence: 87%

“…The aim of the present study was to test the single and combined effects of 2 strains of cyanobacteria (producing microcystins and saxitoxins) isolated from the Funil Reservoir on the fitness and antioxidant enzymes of 3 cladoceran species. Previous studies on the same cyanobacterial strains showed effects of single exposures to only one strain separately . In the present study, we used both single and combined cyanobacteria exposures to evaluate the effects on clearance rate, mobility, survivorship, fecundity, population increase rate ( r ), and antioxidant enzymes of 2 native cladoceran species ( Daphnia laevis and M. micrura ), and one laboratory clone of temperate origin ( D. similis ).…”

Section: Introductionmentioning

confidence: 99%

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Single and combined effects of microcystin‐ and saxitoxin‐producing cyanobacteria on the fitness and antioxidant defenses of cladocerans

Ferrão-Filho

Silva

Oliveira

et al. 2017

Enviro Toxic and Chemistry

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Cyanobacteria produce different toxic compounds that affect animal life, among them hepatotoxins and neurotoxins. Because cyanobacteria are able to produce a variety of toxic compounds at the same time, organisms may be, generally, subjected to their combined action. In the present study, we demonstrate the single and combined effects on cladocerans of cyanobacteria that produce microcystins (hepatotoxins) and saxitoxins (neurotoxins). Animals were exposed (either singly or combined) to 2 strains of cyanobacteria isolated from the same environment (Funil Reservoir, Rio de Janeiro, Brazil). The effects on clearance rate, mobility, survivorship, fecundity, population increase rate (r), and the antioxidant enzymes glutathione-S-transferase (GST) and catalase (CAT) were measured. Cladoceran species showed a variety of responses to cyanobacterial exposures, going from no effect to impairment of swimming movement, lower survivorship, fecundity, and general fitness (r). Animals ingested cyanobacteria in all treatments, although at lower rates than good food (green algae). Antioxidant defense responses were in accordance with fitness responses, suggesting that oxidative stress may be related to such effects. The present study emphasizes the need for testing combined actions of different classes of toxins, because this is often, and most likely, the scenario in a more eutrophic world with global climatic changes. Environ Toxicol Chem 2017;36:2689-2697. © 2017 SETAC.

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Section: Discussionsupporting

confidence: 91%

Section: Cyrfmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Single and combined effects of microcystin‐ and saxitoxin‐producing cyanobacteria on the fitness and antioxidant defenses of cladocerans

Ferrão-Filho

Silva

Oliveira

et al. 2017

Enviro Toxic and Chemistry

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“…Previous reports identified that a concentration of 1.37 ng L −1 STX caused a 50% reduction in the motility of D. similis after a 2-h exposure (Ferrão-Filho et al 2014). Even smaller concentrations (0.24 ng L −1 ) inhibited natatory movements of D. pulex (Costa et al 2013).…”

Section: Resultsmentioning

confidence: 86%

Evaluation of the Ecotoxicological Effects of Microcystis aeruginosa and Cylindrospermopsis raciborskii on Ceriodaphnia dubia Before and After Treatment with Ultrasound

Lira

Moreira

Tonello

et al. 2017

Water Air Soil Pollut

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Bodies of water contaminated by cyanobacteria and their neuro-and hepatotoxins have caused environmental and public health issues all over the world. Therefore, determining safe concentrations in water for multiple uses to protect aquatic biota and identify forms of remediation are of broad interest. In this study, we isolated strains of the cyanobacteria Microcystis aeruginosa and Cylindrospermopsis raciborskii, which produce microcystin (MC) and saxitoxin (STX), respectively. Ecotoxicological tests using suspensions of lysed lyophilizated cells with concentrations of toxins equivalent to those permitted by legislation for potability (1 μg L −1 for MC and 3 μg L −1 for STX) did not result in significant mortality of the model organism, Ceriodaphnia dubia, where as concentrations five times greater resulted in decreased survival for both toxins. However, reproduction was significantly reduced even in the lower concentrations, indicating that the currently permitted standards are not safe for environmental protection. When cyanotoxins were treated with ultrasound, mortalities were no longer significant, independent of concentrations. Although reproduction was still lower in relation to the control, it was significantly higher when compared to the results obtained before ultrasound. Ultrasound has been previously applied to cyanobacteria cell lysis, but this is the first study to investigate the ecotoxicological effects of ultrasound on cyanotoxins. Using new test organisms and different times and potency of sonication will permit the development of more efficient techniques for the remediation of these toxins and the development of more adequate parameters for the protection of aquatic life.

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“…Vilar, personal communication). This cyanobacterium is considered potentially toxic to zooplankton, especially to cladocerans (Ferrão-Filho et al 2014). The presence of these potentially toxic cyanobacteria is a common feature in Brazilian Northeast Reservoirs (Dantas et al 2011, Almeida et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Can nearby eutrophic reservoirs sustain a differentiated biodiversity of planktonic microcrustaceans in a tropical semiarid basin?

Diniz

Júnior

2017

An. Acad. Bras. Ciênc.

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This paper aims to compare alpha and beta diversities of planktonic microcrustaceans from three reservoirs located nearby in a tropical semiarid basin. Our hypothesis was that alpha and beta diversities of the community are different, although the ecosystems are located close to each other. We carried out two sampling campaigns: dry and rainy seasons. The sampling of microcrustaceans and environmental variables (dissolved oxygen, chlorophyll a and nutrient) was performed at twelve stations and were distributed throughout the three zones (river, transition, and lacustrine), using a plankton net (45 µm). The reservoirs showed different uses and types of nitrogen predominance: Cachoeira (supply/nitrate), Borborema (sewage/ammonia) and Saco (aquaculture/ammonia). Seventeen species were recorded whose richness was assessed as particularly specific to each one of the studied reservoirs. Seasonally, both reservoirs with high anthropogenic alteration showed greater richness in the dry season. The three reservoirs located in a same basin showed different richness and composition, but the diversity did not differ between the zones of the reservoirs. Although communities are close to each other, their composition and richness were found to be distinct for each reservoir. This may be in response to the peculiar particularities, such as nitrogen sources and the different uses.

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Effects of Cylindrospermopsis raciborskii (cyanobacteria) on the swimming behavior of Daphnia (cladocera)

Cited by 32 publications

References 41 publications

Single and combined effects of microcystin‐ and saxitoxin‐producing cyanobacteria on the fitness and antioxidant defenses of cladocerans

Single and combined effects of microcystin‐ and saxitoxin‐producing cyanobacteria on the fitness and antioxidant defenses of cladocerans

Evaluation of the Ecotoxicological Effects of Microcystis aeruginosa and Cylindrospermopsis raciborskii on Ceriodaphnia dubia Before and After Treatment with Ultrasound

Can nearby eutrophic reservoirs sustain a differentiated biodiversity of planktonic microcrustaceans in a tropical semiarid basin?

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