Consequences of acclimation to <i>Microcystis</i> on the selective feeding behavior of the calanoid copepod <i>Eudiaptomus gracilis</i>

Ger, Kemal Ali; Panosso, Renata; Lürling, Miquel

doi:10.4319/lo.2011.56.6.2103

Cited by 45 publications

(45 citation statements)

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“…, 2010). In addition, in warmer climates, copepods typically dominate the crustacean zooplankton year‐round and may indirectly facilitate cyanobacteria by grazing on competing phytoplankton (Ger, Panosso & Lürling, 2011).…”

Section: Discussionmentioning

confidence: 99%

Comparison of cyanobacterial and green algal growth rates at different temperatures

et al. 2012

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Summary 1. The hypothesis that cyanobacteria have higher optimum growth temperatures and higher growth rates at the optimum as compared to chlorophytes was tested by running a controlled experiment with eight cyanobacteria species and eight chlorophyte species at six different temperatures (20–35 °C) and by performing a literature survey. 2. In the experiment, all organisms except the chlorophyte Monoraphidium minutum grew well up to 35 °C. The chlorophyte Chlamydomonas reinhardtii was the fastest‐growing organism over the entire temperature range (20–35 °C). 3. Mean optimum growth temperatures were similar for cyanobacteria (29.2 °C) and chlorophytes (29.2 °C). These results are concordant with published data, yielding slightly higher mean optimum growth temperatures for cyanobacteria (27.2 °C) than for chlorophytes (26.3 °C). 4. Mean growth rates of cyanobacteria at 20 °C (0.42 day−1) were significantly lower than those of chlorophytes at 20 °C (0.62 day−1). However, at all other temperatures, there were no differences between mean growth rates of cyanobacteria and chlorophytes. 5. Mean growth rates at the optimum temperature were similar for cyanobacteria (0.92 day−1) and chlorophytes (0.96 day−1). However, analysis of published data revealed that growth rates of cyanobacteria (0.65 day−1) were significantly lower than those of chlorophytes (0.93 day−1) at their optimum temperatures. 6. Although climate warming will probably lead to an intensification of cyanobacterial blooms, our results indicate that this might not be as a result of higher growth rates of cyanobacteria compared with their chlorophyte competitors. The competitive advantage of cyanobacteria can more likely be attributed to their ability to migrate vertically and prevent sedimentation in warmer and more strongly stratified waters and to their resistance to grazing, especially when warming reduces zooplankton body size.

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Section: Discussionmentioning

confidence: 99%

Comparison of cyanobacterial and green algal growth rates at different temperatures

et al. 2012

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“…Copepods show a high degree of feeding selection by maximising the ingestion of the most nutritious food from a mixture of particles using chemosensory detection to differentiate the size, nutrition and digestibility of encountered particles (DeMott, 1989;Kleppel, 1993;Tackx et al, 2003;Tirelli & Mayzaud, 2005). When cyanobacteria are encountered, copepods use different cyanobacterial secondary metabolites (such as microcystin, lipopolysaccharides and unidentified lipophylic compounds) as detection cues to avoid ingestion (Kurmayer & Juttner, 1999;Engstrom et al, 2000;Ger, Panosso & Lurling, 2011). Consequently, selective feeding usually allows copepods uninhibited feeding on alternative food in the presence of toxic cyanobacteria, resulting in the grazer coexisting with blooms (Bouvy et al, 2000;Koski et al, 2002).…”

Section: Macroevolutionary Adaptations To Cyanobacteria (Interspecifimentioning

confidence: 99%

“…Another study showed how a 5-day exposure to cyanobacteria enhanced the feeding selectivity for 'good food' in the calanoid copepod Eudiaptomus gracilis (Ger et al, 2011). Clearly, induced responses to short-term cyanobacteria exposure can improve the tolerance traits of individual zooplankton and may be common in nature.…”

Section: Induced Physiological or Behavioural Adaptations (Phenotypicmentioning

confidence: 99%

Understanding cyanobacteria‐zooplankton interactions in a more eutrophic world

2014

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SUMMARY1. We review and update recent observations of cyanobacteria-zooplankton interactions, identify theoretical and methodological limitations and evaluate approaches necessary for understanding the effects of increasing cyanobacterial blooms on plankton dynamics. 2. The emphasis on oversimplified studies using large-bodied Daphnia species, not previously exposed to cyanobacteria, has limited our understanding of how the plankton responds to proliferating blooms. This overlooks the great diversity in zooplankton traits, and the adaptability of planktonic grazers, that enables them to deal with toxic prey. 3. Under increasing temperature and nutrient loading, the zooplankton will be subjected to increasingly intense selection pressure to tolerate cyanobacteria. Short zooplankton generation times suggest that increased blooms may select for the rapid evolution of behavioural and physiological traits that improve tolerance. 4. As eutrophication intensifies, should we expect physiologically tolerant zooplankton that may be able to control blooms, or be concerned with the effects of selective grazers in stabilising blooms? 5. We conclude that the increasing frequency, duration and intensity of blooms will select for better adapted zooplankton that coexist with, rather than control, cyanobacteria. Future evaluations of cyanobacteria-zooplankton interactions should consider that increasing exposure to blooms induces phenotypic and genotypic traits improving zooplankton tolerance. Equally important will be studies of the ecophysiology of zooplankton species that coexist with prolonged blooms, rather than those of a few large-bodied generalist cladocerans. 6. Since cyanobacteria produce more than one toxic or inhibitory metabolite, the unsystematic designation of toxicity based on single well-identified compounds (e.g. microcystin) should be revised. 7. Overall, the coevolutionary interaction between cyanobacterial defences and zooplankton grazer responses emerges as a critical but understudied regulator of bloom dynamics.

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“…The δ Pace & Carman 1996, Buffan-Dubau & Carman 2000. Furthermore, when feeding conditions are unfavorable, harpacticoids can adjust their feeding rate (Montagna et al 1995), may shift to alternative food sources as observed for planktonic copepods (Ger et al 2011), or survive on their lipid reserves (Weiss et al 1996). The copepod's fatty acid (FA) profile, and in particular their high levels of the highly unsaturated FAs (PUFA) 20:5ω3 (eicosapentaenoic acid; EPA) and 22:6ω3 (docosahexaenoic acid; DHA) contribute to the nutritional value of copepods for fish (Nanton & Castell 1998, Bell et al 2003.…”

Section: Introductionmentioning

confidence: 99%

Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

Cnudde

Moens

Werbrouck

et al. 2015

Mar. Ecol. Prog. Ser.

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Consequences of acclimation to Microcystis on the selective feeding behavior of the calanoid copepod Eudiaptomus gracilis

Cited by 45 publications

References 45 publications

Comparison of cyanobacterial and green algal growth rates at different temperatures

Comparison of cyanobacterial and green algal growth rates at different temperatures

Understanding cyanobacteria‐zooplankton interactions in a more eutrophic world

Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

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