冰下浮游生物和脂质动态在一个亚北极湖
Erwin Kers1, Eva Leu2, Per-Arne Amundsen1
1Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Framstredet 39, Tromsø 9037, Norway.
Journal of plankton research
|June 3, 2024
概括
气候变暖影响亚北极湖泊. 这项研究揭示了过冬的copepods,Cyclops scutifer和Eudiaptomus graciloides,利用储存的脂质,E. graciloides也在冰下繁殖.
科学领域:
- 临界技术 临界技术
- 北极生态学 北极生态学
- 动物浮游生物生态生态学
背景情况:
- 亚北极湖泊面临较短的冬季由于气候变暖,改变冰和雪覆盖.
- 了解冰下生态系统的运作对于预测生态变化至关重要.
研究的目的:
- 研究脂质动力学和冬季在亚北极湖泊过冬的copepods的生命历史.
- 在冰盖下比较Cyclops scutifer和Eudiaptomus graciloides的过冬策略.
主要方法:
- 在整个冰覆盖季节监测浮游生物群落.
- 分析copepods的脂质含量和脂肪酸概况.
- 评估C. scutifer和E. graciloides的生命史特征 (发育阶段,繁殖).
主要成果:
- 这两种copepod物种在冰上之前都积累了大量的脂质,在冬季观察到的显著下降.
- 在冰下繁殖的Eudiaptomus graciloides,显示脂质含量和稳酸的快速下降 (18:4n-3).
- 旋在后期发育阶段过冬,脂质积累持续到1月份,而E. graciloides利用冰下初级生产.
结论:
- 脂质的积累和利用对于活跃地过冬的足动物至关重要,无论生殖时间如何.
- 不同的养策略影响脂质动态和冬季成功在亚北极copepods.
- 冰下初级生产可以在冬季支持某些动物浮游生物物种的繁殖.
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