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468 results for “Daphnia”
Lake water chemistry and local adaptation shape NaCl toxicity in Daphnia ambigua
<p>The increasing application of road deicing agents (e.g., NaCl) has caused widespread salinization of freshwater environments. Chronic exposure to toxic NaCl levels can impact freshwater biota at genome to ecosystem scales, yet the degree of harm caused by road salt pollution is likely to vary among habitats and populations. The background water chemistry may strongly impact NaCl toxicity, with greater harm occurring in ion-poor freshwater environments. In addition, populations exposed to salinization may evolve increased NaCl tolerance. We examined the potential for these two factors, genetics and environmental context, to interact in shaping NaCl toxicity in natural populations of the water flea <em>Daphnia</em> <em>ambigua</em>. We performed a reciprocal transplant toxicity trial using <em>Daphnia</em> clones from three lakes varying in ion availability. NaCl toxicity greatly increased in calcium-poor (1.7 mg/L) lake water compared with a high-calcium (7.2 mg/L) environment, especially for <em>Daphnia</em> from the high-calcium lake. Meanwhile, <em>Daphnia</em> from an ion-rich lake showed evidence of adaptation to NaCl exposure, especially in their natal lake water. Our findings that the lake water environment, adaptation to that environment, and adaptation to a contaminant of interest may interact to shape toxicity demonstrate the importance of considering environmental and genetic complexity in mitigating pollution impacts.</p>
The effect of microplastics on Daphnia fitness – systematic review and meta-analysis.
<p>Systematic review on studies on micro/nanoplastic effect on <em>Daphnia</em> published up to 27 April 2022, including a meta-analysis on the effect of micro/nanoplastics on <em>Daphnia</em> reproduction.</p>
Induction of daytime downward migration in a field-derived Daphnia population by the fish kairomone CPS – a mesocosm approach
<p>The fish-borne bile salt 5α-cyprinol sulfate (CPS) has been identified as a kairomone inducing the predator avoidance behavior "diel vertical migration" (DVM) in <em>Daphnia</em> <em>magna</em> in response to fish. Conclusions about the ecological significance of CPS have been derived from laboratory experiments only. Using a mesocosm approach, we investigate whether the role of CPS as a kairomone can be confirmed in the field. We demonstrate that CPS induces downward migration during daytime in a field-derived <em>Daphnia</em> community consisting of <em>D. longispina </em>and<em> D. cucullata </em>and<em> in D. longispina</em> in particular. In the study lake, <em>D. longispina</em> shows a similar pattern of DVM. Quantification of CPS by HPLC-MS confirms that CPS in situ concentrations in the lake are sufficiently high for induction of daytime downward migration of <em>D. longispina</em> in this oligo-mesotrophic lake. Conclusively, we provide evidence for the significance of CPS as a kairomone in freshwater systems.</p>
Data for: Differential genotype response to increased resource abundance helps explain parallel evolution of Daphnia populations in the wild
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Persisting effects in Daphnia magna following an acute exposure to flowback and produced waters from the Montney Formation
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The maternal effects of dietary restriction on Dnmt expression and reproduction in two clones of Daphnia pulex
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Data: Rapid evolution of unimodal but not of linear thermal performance curves in Daphnia magna
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Influence of melatonin on the successful infection of Daphnia dentifera by Metschnikowia bicuspidata
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Ancestral environment determines the current reaction to ultraviolet radiation in Daphnia magna
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Combined toxicity of perfluorinated compounds and microplastics on the sentinel species Daphnia magna: Implications for freshwater ecosystems
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Data from: Eco-evolutionary dynamics in the wild: clonal turnover and stability in Daphnia populations
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Can short-term data accurately model long-term environmental exposures? Investigating the multigenerational adaptation potential of Daphnia magna to environmental concentrations of organic ultraviolet filters
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Dataset for dopamine manipulated daphnia
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Different photoperiodic responses in diapause induction can promote the maintenance of genetic diversity via the storage effect in Daphnia pulex
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Acclimation capacity and rate change through life in the zooplankton Daphnia
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Data for: Are UV filters better together? A comparison of the toxicity of individual ultraviolet filters and off-the-shelf sunscreens to Daphnia magna
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Plasticity in Daphnia eye size is determined by intra-generational environmental conditions
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Lake water chemistry and local adaptation shape NaCl toxicity in Daphnia ambigua
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The morphological and life-history data of two Daphnia species under different fish kairomone concentrations
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Data from: Resurrected “ancient” Daphnia genotypes show reduced thermal stress tolerance compared to modern descendants
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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