恐龙状动物的垂直迁移引发了强烈的红潮
Bofu Zheng1, Andrew J Lucas1,2, Peter J S Franks1
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093.
概括
有害的藻类繁殖 (HABs) 是由恐龙状藻类的垂直迁移驱动的,这使它们能够获得深层营养. 这种行为为高生物质提供燃料,影响海洋生态系统和生物地球化学.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 生态生态学 生态生态学
背景情况:
- 在全球范围内,有害藻类繁殖 (HAB) 正在增加,对海洋生态系统,人类健康和经济构成重大风险.
- 驱动某些HAB的异常高生物质的机制,特别是恐龙体的开花,尚未完全理解.
- 一个长期存在的假设表明, involving diel垂直迁移, dinoflagellate 流动性,使他们能够通过访问光和深度营养素来超越非运动性浮游植物.
研究的目的:
- 测试该假设,dinoflagellate垂直迁移是营养获取和生物质积累在HABs期间的关键机制.
- 为了研究恐龙虫垂直迁移模式和海洋中营养物质的可用性之间的关系.
- 评估HAB诱导的垂直迁移对沿海海洋生物地质化学的影响.
主要方法:
- 利用自主,海洋波驱动的垂直分析系统进行现场数据收集.
- 在2020年红潮事件期间监测了恐龙 *Lingulodinium polyedra* 的垂直迁移.
- 分析了与迁移深度相关的酸盐度,浮游植物叶绿素和悬浮颗粒负载.
主要成果:
- 证明Lingulodinium polyedra*的垂直迁移导致红潮期间深酸盐的显著耗尽.
- 观察到向下迁移的深度与当地酸盐的可用性相关.
- 发现垂直迁移,深层酸盐吸收和植物浮游生物和颗粒负载增加之间存在直接联系.
结论:
- 证实,恐龙状动物的垂直迁移是获取和同化深海营养的关键策略,推动了高繁荣的生物质.
- 通过垂直迁移,HAB可以暂时改变沿海海洋生物地质化学和生态系统结构.
- 强调了解恐龙体的行为和生理学的重要性,以改善HAB预测和缓解策略.
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