Light and temperature acclimation of Rhodomonas salina (Cryptophyceae): photosynthetic performance

Hammer, Astrid; Schumann, Rhena; Schubert, Hendrik

doi:10.3354/ame029287

Cited by 68 publications

(51 citation statements)

References 69 publications

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“…Significant peaks of Cryptophyceae were also described for the cascade of reservoirs in the Iguaçu River, in the southern State of Paraná (Silva et al, 2005). The hypothesis of an alternative heterotrophic strategy of Cryptophyceae (Hammer et al, 2002) was not verified, since there was no correlation with dissolved organic carbon concentration.…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

et al. 2010

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The phytoplankton assemblages from eight reservoirs of the Paranapanema River were studied during two consecutive years. Chlorophyceae and Bacillaryophyceae dominated in richness. The observed high number of taxa, 234, reflects the extensive sampling programme and evidences the necessity of considering the whole hydrograph basin to assess the biodiversity status of inland water ecosystems. The dams had a negative effect on phytoplankton richness, with higher number of taxa associate to riverine (non-regulated) stretches. The tributary rivers also exhibited high species richness, showing the importance of considering the lateral dimension, in addition to the longitudinal one, for aquatic biota inventories in large river basins/reservoirs. Richness and diversity were also positively influenced by the connectivity with lateral wetlands (macrophyte-dominated lakes) due to the periphyton influence. The phytoplankton abundance/ biomass was not influenced by higher water retention time. Higher values occurred in the middle basin stretches (riverpassage reservoirs) due to the increase in the trophic conditions. There was a positive correlation with phosphorus. Poorer light conditions in the cascade do not limit the phytoplankton biomass, with assemblages dominated by species tolerant to turbulent conditions and high mineral turbidity. Bacillariophyceae and Cryptophyceae dominated numerically. The first group (unicellular forms) was prominent in the large and oligotrophic upstream reservoirs. The second was highly abundant in the river-passage (low retention time), and more eutrophic, reservoirs. Cyanophyceae growth is probably controlled by advection processes (wash-out effect). The zooplankton does not control the phytoplankton biomass and the diversity of both groups is positively associated in the cascade. The structure of the phytoplankton assemblages showed to be a good indicator of the operationally distinct reservoirs of the Paranapanema cascade and also reflected the changes in the trophic conditions along the basin.Keywords: Paranapanema River, Chlorophyceae, Bacillaryophyceae, Cryptophyceae, reservoir limnology.Assembleias fitoplanctônicas de reservatórios em cascata de um rio tropicalsubtropical de grande porte (SE, Brasil) ResumoAs assembleias fitoplanctônicas de oito reservatórios do rio Paranapanema foram estudadas durante dois anos consecutivos. Chlorophyceae e Bacillaryophyceae foram os grupos dominantes em riqueza. O elevado número de táxons observado, 234, reflete o extensivo programa de amostragem e evidencia a necessidade de se considerar a bacia hidrográfica como um todo em programas de avaliação da biodiversidade de ecossistemas aquáticos interiores. As barragens tiveram um efeito negativo sobre a riqueza do fitoplâncton, sendo o maior número de táxons associado aos trechos fluviais (não regulados). Os rios tributários também exibiram um elevado número de espécies, mostrando a importância de se considerar a dimensão lateral, além do gradiente longitudinal, para os inventários da biota aquát...

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Section: Discussionmentioning

confidence: 99%

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

et al. 2010

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“…It is likely that the sea ice flagellates supplemented or substituted photosynthesis with mixotrophy or heterotrophy. A species of Rhodomonas (the dominant sea ice cryptophyte genus) has been identified as a likely mixotroph (Hammer et al 2002), and hetero-and mixotrophy is common among dinoflagellates (Arrigo 2003). However, pennate diatoms are also nutritionally diverse (e.g.…”

Section: Discussionmentioning

confidence: 99%

Microalgal composition and primary production in Arctic sea ice: a seasonal study from Kobbefjord (Kangerluarsunnguaq), West Greenland

Mikkelsen¹,

Rysgaard²,

Glud³

2008

Mar. Ecol. Prog. Ser.

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“…grew faster at 26°C than in the control. R. salina is known to show increased growth rates at higher temperatures (Hammer et al, 2002). Chlamydomonas spp.…”

Section: Resistance and Resilience To Heat Wavesmentioning

confidence: 99%

Stability of marine phytoplankton communities facing stress related to global change: Interactive effects of heat waves and turbidity

Remy

Hillebrand

Flöder

2017

Journal of Experimental Marine Biology and Ecology

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A B S T R A C TAccording to climate models, coastal ecosystems will face an increased frequency of heat waves and increased turbidity due to terrestrial sediment run-off induced by increasing precipitation. Several studies have examined the effects of heat waves and turbidity separately, whereas this study analysed the individual effects of both stressors as well as their interaction, because stressors affect communities differently when acting in combination. Using a factorial experimental design, we simulated heat waves (22°C and 26°C compared to an 18°C control) and turbidity (sediment addition). The response of the phytoplankton community was analysed for the aggregate parameters biovolume and diversity index (H′), as well as for community composition. Heat waves had a significant negative effect on biovolume, whereas turbidity tended to affect biovolume positively. Repeated measures ANOVA revealed significant interactions of heat waves and turbidity for H′ and community composition. Strong heat waves (26°C) alleviated the otherwise positive effect of turbidity on H′, i.e. highest diversity remained in the turbid control. Diatoms gained dominance in the control and the 22°C heat wave treatment with Cylindrotheca closterium being the successful competitor. At 26°C this species was lost and small flagellates dominated the experimental communities. Future increases in heat wave intensity and frequency may thus induce major changes in phytoplankton community structure whereas algae might profit from increased turbidity as an additional source of nutrients.

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Light and temperature acclimation of Rhodomonas salina (Cryptophyceae): photosynthetic performance

Cited by 68 publications

References 69 publications

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

Microalgal composition and primary production in Arctic sea ice: a seasonal study from Kobbefjord (Kangerluarsunnguaq), West Greenland

Stability of marine phytoplankton communities facing stress related to global change: Interactive effects of heat waves and turbidity

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