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温度,和物种组成都会影响浮游植物的生长和多不和脂肪酸的含量
Marco L Calderini1, Salli Pääkkönen2, Pauliina Salmi2
1Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35 FI-40014, Jyväskylä, Finland.
Journal of plankton research
|July 24, 2023
概括
气候变化变暖和水平对植物浮游生物的生长和多不和脂肪酸的产生在物种之间产生不同的影响. 未来EPA和DHA等必需脂肪酸的可用性取决于浮游植物物种的组成.
科学领域:
- 水生生态学 水生生态学
- 生物地质化学生物地质化学
- 气候变化研究研究 气候变化研究
背景情况:
- 预计气候变化引起的变暖将减少全球湖泊中的多不和脂肪酸 (PUFA).
- 对于湖泊的热带状况,营养动态和变暖如何共同影响PUFA可用性的理解有限.
研究的目的:
- 研究变暖和对浮游植物生长和PUFA生产的相互作用影响.
- 评估不同植物浮游生物群体内物种特异性反应的影响.
主要方法:
- 实验室实验操纵温度 (18-23°C) 和度 (0.65-2.58μM) 的实验.
- 培养了来自六个主要群体的10种植物浮游生物:藻,金色藻类,蓝藻,绿藻,加密植物和恐龙.
- 分析了对植物浮游生物生长和PUFA含量的影响,包括eicosapentaenoic acid (EPA) 和docosahexaenoic acid (DHA).
主要成果:
- 增加的温度和都显著增强了植物浮游生物的生长,显著刺激了蓝藻细菌 (例如,Microcystis sp. ) 的情况.
- 温度和对PUFA的比例产生了相反的影响,与物种特定的变化.
- 在变暖的条件下,合成EPA和DHA的物种并没有始终显示出产量或含量下降.
结论:
- 变暖对湖泊PUFA可用性的影响可能因营养水平和浮游植物群体组成而有所不同.
- 同一个植物浮游生物群中的不同物种可以对变暖表现出截然不同的反应.
- 未来的必需脂肪酸EPA和DHA的生产主要取决于浮游植物物种组成的变化.
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