Effect of crude extracts of Dolichospermum planctonicum on the demography of Plationus patulus (Rotifera) and Ceriodaphnia cornuta (Cladocera)

Zamora-Barrios, Cesar Alejandro; Nandini, S.; Sarma, S. S. S.

doi:10.1007/s10646-014-1358-8

Cited by 28 publications

(15 citation statements)

References 35 publications

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“…planktonicum observed in our experiment is of particular concern for water quality in that many species of Dolichospermum are known to produce neurotoxins (Li, Dreher, & Li, ), and D. planktonicum also produces a microcystin‐like liver toxin (Bruno, Barbini, Pierdominici, Serse, & Ioppolo, ). Extracts of D. planktonicum have strong inhibitory effects on the growth and reproduction of rotifers and cladocerans (Barrios, Nandini, & Sarma, ), two zooplankton groups in the food web of permafrost thaw lakes (Abramova et al., ; Bégin & Vincent, ). The stimulation of picocyanobacteria by P enrichment would likely compound the stresses imposed on the zooplankton, given that subarctic picoplankton appear to be a poor quality food source for cladocerans in these thaw lakes (Przytulska, Bartosiewicz, Rautio, Dufresne, & Vincent, ).…”

Section: Discussionmentioning

confidence: 99%

Increased risk of cyanobacterial blooms in northern high‐latitude lakes through climate warming and phosphorus enrichment

2017

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Harmful cyanobacterial blooms are an increasing problem at many locations throughout the world but are rarely reported in aquatic habitats at high latitudes. Shallow lakes are a major feature of northern permafrost landscapes and are likely to experience large‐scale changes in their limnological properties in the future as a consequence of climate warming. In the present study, we addressed the question of what preconditions would be necessary to stimulate the growth and dominance of bloom‐forming cyanobacteria in northern fresh waters. We analysed the summer phytoplankton of 18 lakes on eroding permafrost (thaw lakes) and on glacier‐scoured rock (rock basin lakes) in subarctic Quebec, Canada, to determine their phytoplankton community structure and the biomass contribution of cyanobacteria. This survey was complemented with an incubation experiment to evaluate the direct warming and indirect phosphorus (P) enrichment effects of climate change on cyanobacterial bloom development. All lakes contained diverse phytoplankton communities, often dominated by chrysophytes, dinoflagellates and chlorophytes. Cyanobacteria were present in all waterbodies, but their contribution to the total community biovolume was highly variable (mean of 8.7%, range 0.1%–47%). Cyanobacterial community biovolumes correlated positively with surface water temperatures, and negatively with dissolved organic carbon, soluble reactive phosphorus, iron and manganese concentrations in the surface waters. Phosphorus enrichment of water from a thaw lake resulted in a fourfold increase of chlorophyll a (Chl‐a) and an increase in the cyanobacterial pigments echinenone and zeaxanthin. The phytoplankton counts showed that there was a sharp decrease in diversity (expressed as decline of the Shannon–Wiener index from 1.69 to 0.16), accompanied by a shift to cyanobacterial dominance, notably by the heterocystous, potentially toxic species Dolichospermum cf. planctonicum. Increased temperature led to an initial doubling of cyanobacterial biovolume, followed by the development of a chrysophyte bloom. Combined warming and P enrichment led to reduced phytoplankton biodiversity, with a community composed of cyanobacteria and chrysophytes. There was also a pronounced response by the picophytoplankton community; picocyanobacteria were strongly stimulated by P enrichment, while picoeukaryotes increased in response to warming. The current inoculum levels of cyanobacteria in subarctic lakes and their responsiveness to temperature and phosphorus indicate the potential for an abrupt increase in their abundance, accompanied by a decrease in phytoplankton diversity. Ongoing climate change will increase the risk of noxious cyanobacterial blooms in northern lakes and ponds, with potentially negative consequences for higher trophic levels.

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Section: Discussionmentioning

confidence: 99%

Increased risk of cyanobacterial blooms in northern high‐latitude lakes through climate warming and phosphorus enrichment

2017

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“…When using lower microcystin concentrations (0.41 to 0.44 μg L −1 ), Barrios et al (2015) observed a reduction in the reproduction and survival of Ceriodaphnia cornuta. Conversely, Dao et al (2010) did not find negative impacts in chronic assays with D. magna using MC-LR (5 μg L −1 ), and Okumura et al (2007) also did not find interference to their production or survival of C. silvestrii using concentrations of MC varying from 60 to 480 μg g −1 obtained from lyophilized cultures of M. aeruginosa.…”

Section: Resultsmentioning

confidence: 89%

“…Most assays using ultrasound and cyanobacteria have often been verifications for this method in cell lysis (Pietsch et al 2001;Okumura et al 2007;Zagatto et al 2012;Barrios et al 2015;Herrera et al 2015). Zagatto et al (2012) is the only report for performing ecotoxicological tests after cell lysis and found increased levels of toxicity in the test organism Ceriodaphnia dubia, possibly due to released cyanotoxins.…”

Section: Introductionmentioning

confidence: 99%

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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“…One-way ANOVA followed by Leastsignificant difference (LSD) was performed to compare the hatching rates and population growth rates among different experimental treatments (NP-NP; NP-P; P-NP, and P-P). Population growth curves were profiled using OriginPro version 9.0 and were compared with repeated measures ANOVA (Barrios et al, 2015). If given the results of the Mauchly's test on sphericity (W < 0.001, P < 0.001), the df and P value of repeated measures ANOVA were corrected using the Greenhouse-Geisser correction.…”

Section: Statistical Datamentioning

confidence: 99%

Maternal Effects Via Resting eggs in Predator Defense of the Rotifer Brachionus calyciflorus

Niu

2018

Zoological Science

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Maternal effects play important evolutionary and ecological roles. Amictic female mothers of monogonont rotifer Brachionus calyciflorus can transmit predatory information of Asplanchna brightwellii in their environment to their offspring by changing the offspring's defensive morphology to increase their fitness. However, it remains unclear whether such maternal effects also exist during sexual reproduction of a mictic mother. This study explored the maternal effect in mictic mothers using the B. calyciflorus and A. brightwellii as a prey-predator model. We collected resting eggs from two groups of mictic mothers that previously experienced environments with (P environment) or without (NP environment) Asplanchna kairomones. Stem females from the resting eggs of each maternal group were also hatched and reared in P and NP environments. The population growth rate of offspring who experienced the same environment as their mictic mothers was significantly higher than those that experienced a different environment. When exposed to a gradient of predator kairomone levels, the posterolateral spine of the offspring elongated with increasing kairomone concentration. Offspring from the P mictic mother showed significantly shorter posterolateral spines than those from the NP mictic mother at each predator kairomone level. Offspring originating from NP mictic mothers clearly elongated their posterolateral spines at low concentrations of predator kairomones, while those from P mothers elongated their posterolateral spines only at the highest levels of predator kairomone. Our findings highlight the existence of anticipatory maternal effects during the sexual process via resting eggs of B. calyciflorus in response to predator kairomone.

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Effect of crude extracts of Dolichospermum planctonicum on the demography of Plationus patulus (Rotifera) and Ceriodaphnia cornuta (Cladocera)

Cited by 28 publications

References 35 publications

Increased risk of cyanobacterial blooms in northern high‐latitude lakes through climate warming and phosphorus enrichment

Increased risk of cyanobacterial blooms in northern high‐latitude lakes through climate warming and phosphorus enrichment

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

Maternal Effects Via Resting eggs in Predator Defense of the Rotifer Brachionus calyciflorus

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