The cryptophyte Teleaulax amphioxeia is a source of plastids for the ciliate Mesodinium rubrum and both organisms are members of the trophic chain of several species of Dinophysis. It is important to better understand the ecology of organisms at the first trophic levels before assessing the impact of principal factors of global change on Dinophysis spp. Therefore, combined effects of temperature, irradiance, and pH on growth rate, photosynthetic activity, and pigment content of a temperate strain of T. amphioxeia were studied using a full factorial design (central composite design 2³*) in 17 individually controlled bioreactors. The derived model predicted an optimal growth rate of T. amphioxeia at a light intensity of 400 μmol photons · m⁻² · s⁻¹, more acidic pH (7.6) than the current average and a temperature of 17.6°C. An interaction between temperature and irradiance on growth was also found, while pH did not have any significant effect. Subsequently, to investigate potential impacts of prey quality and quantity on the physiology of the predator, M. rubrum was fed two separate prey: predator ratios with cultures of T. amphioxeia previously acclimated at two different light intensities (100 and 400 μmol photons · m⁻² s⁻¹). M. rubrum growth appeared to be significantly dependent on prey quantity while effect of prey quality was not observed. This multi‐parametric study indicated a high potential for a significant increase of T. amphioxeia in future climate conditions but to what extent this would lead to increased occurrences of Mesodinium spp. and Dinophysis spp. should be further investigated.

中文翻译：

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温度，辐照度和pH值对天竺葵（Cryptophyceae）捕食性中性红球菌（Ciliophora）的生理和摄食率的综合影响1。

所述cryptophyte Teleaulax amphioxeia是质体为纤毛虫的源缢虫和两种生物体是几个物种的营养链成员鳍藻。重要的是，在评估全球变化的主要因素对Dinophysis spp的影响之前，更好地了解生物在第一营养级的生态。因此，在17个独立控制的生物反应器中，使用全因子设计（中央复合设计2 ³ *）研究了温度，辐照度和pH值对两栖拟南芥温带菌株的生长速率，光合活性和色素含量的综合影响。导出的模型预测最佳增长率为在400μmol光子·m ^-2 ·s ^-1的光强度下，两栖拟南芥（T. amphioxeia）比目前的平均水平更酸性（7.6），温度为17.6°C。还发现温度和辐照度之间对生长有相互作用，而pH值没有任何显着影响。随后，为了调查猎物质量和数量对捕食者生理的潜在影响，M。癣菌送入两个单独的猎物：捕食比例与培养物T. amphioxeia之前在两个不同的光强度驯化（100和400个微摩尔光子·米^-2小号^-1）。中号。风疹增长似乎很大程度上取决于猎物数量，而没有观察到猎物质量的影响。这种多参数研究表明对的显著增长的高潜力T. amphioxeia在未来的气候条件，但到什么程度，这将导致出现增加红豆中缢属。和Dinophysis spp。应该进一步调查。