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首页> 外文期刊>Harmful Algae >Effect Of Tertiary Sewage Effluent Additions On Prymnesium Parvum Cell Toxicity And Stable Isotope Ratios
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Effect Of Tertiary Sewage Effluent Additions On Prymnesium Parvum Cell Toxicity And Stable Isotope Ratios

机译：添加第三级污水对小Pr的细胞毒性和稳定同位素比的影响

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摘要

We investigated the ability of the ichthyotoxic haptophyte Prymnesium parvum to use sewage-originated nutrients applying stable carbon (C) and nitrogen (N) isotope techniques. P. parvum was cultured under N and phosphorus (P) sufficient and deficient conditions in either sewage effluent-based medium or in a nitrate- and phosphate-based control. Cell densities and toxicities were monitored and stable carbon N isotopes signatures (δ~(13)C and δ~(15)N) of P. parvum and the sewage effluent analysed. Nitrogen and P sufficient cultures achieved the highest biomass followed by P and N deficient cultures, regardless of sewage effluent additions. The P deficient cultures with sewage effluent had higher toxicity, estimated as haemolytic activity (9.4 ± 0 × 10~(-5) mg Saponin equiv. cell~(-1)) compared to the P deficient control and to all N deficient and NP sufficient cultures. Nutrient deficient conditions had no effect on the cell δ~(15)N, but a decreasing effect on δ~(13)C in the inorganic N deficient treatment. Growth in sewage-based media was followed by a substantial increase in the cell δ~(15)N (10.4-16.1 ‰) compared to the control treatments (2.4-4.9‰), showing that P. parvum is capable of direct use of sewage-originated N, inorganic as well as organic. Uptake of terrestrial derived C in the sewage treatments was confirmed by a decrease in cell δ~(13)C, implying that P. parvum is able to utilize organic nutrients in sewage effluent.
机译：我们调查了鱼鳞病触媒植物小球藻（Pyrymnesium parvum）利用稳定碳（C）和氮（N）同位素技术利用污水源养分的能力。小菜蛾在氮和磷（P）充足和不足的条件下，以污水为基础的培养基或以硝酸盐和磷酸盐为基础的对照进行培养。监测了小菜蛾的细胞密度和毒性，并对稳定的碳氮同位素特征（δ〜（13）C和δ〜（15）N）进行了分析，并对污水进行了分析。氮和磷充足的培养物获得了最高的生物量，其次是磷和氮缺乏的培养物，无论添加污水如何。缺乏磷的污水培养物具有较高的毒性，据估计其溶血活性（9.4±0×10〜（-5）mg皂素当量细胞〜（-1））与缺乏磷的对照以及所有缺乏氮和NP的相比足够的文化。营养不足条件对细胞δ〜（15）N无效，但对无机氮不足处理对δ〜（13）C的影响减小。与对照处理（2.4-4.9‰）相比，在污水基培养基中生长后，细胞δ〜（15）N显着增加（10.4-16.1‰），表明小菜蛾能够直接使用源自污水的氮，无论是无机的还是有机的。 δ-（13）C细胞的减少证实了污水处理中地面衍生C的吸收，这表明小菜蛾能够利用污水中的有机养分。

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