食者修改了毒素生产和细胞生长之间的恐龙鞭状关系
Gihong Park1, Lydia Norton1, David Avery2
1Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, CT 06340, USA.
Harmful algae
|June 8, 2023
概括
食者相互作用显著影响有毒植物浮游生物的开花. 足动物可以诱导亚历山大虫的毒素产生,但这对细胞生长有代价,揭示了防御-增长的权衡.
科学领域:
- 海洋生物学 海洋生物学
- 物理学的生理学
- 生态毒理学 生态毒理学
背景情况:
- 毒性浮游植物的繁殖动态通常是使用非生物因素建模的.
- 新出现的证据表明,放牧动物在调节毒素产生的过程中起着至关重要的作用.
研究的目的:
- 为了研究牧草控制对亚历山大花在模拟开花期间产生毒素和细胞生长率的影响.
- 要区分牧草动物对毒素诱导的直接和间接影响.
主要方法:
- 在实验室中模拟了亚历山大 (Alexandrium catenella) 的开花.
- 暴露于直接的copepod放牧者,copepod线索,和一个控制 (没有copepods).
- 测量细胞毒素含量和整个开花阶段 (指数式,静止式,下降式) 的净生长率.
主要成果:
- 细胞中毒素含量增加,在花开后达到峰值.
- 观察到生长速度和毒素产生之间的正相关性,特别是在指数阶段.
- 食诱导的毒素产生显著,特别是在直接暴露时,在指数阶段是最高的.
- 在牧草动物的存在下,发现了毒素生产和细胞生长率之间的负相关性,这表明了权衡.
结论:
- 草的存在改变了毒素生产和细胞生长之间的关系,突出了防御-生长的权衡.
- 了解植物浮游生物的繁荣动态需要结合构成性和牧草者诱导的毒素生产机制.
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