在北极湖的冬季浮游生物动态:社区结构,垂直分布和在冰下繁殖
Jean-Simon Boulianne1,2,3, E Henriikka Kivilä1,2,3, Beatrix E Beisner2,4
1Département des Sciences Fondamentales, Université du Québec à Chicoutimi, 555 Boulevard de l'Université, Chicoutimi, Québec G7H 2B1, Canada.
Journal of plankton research
|August 19, 2025
概括
冬季的湖泊生态系统是生物活跃的,微生物循环全年统治能量路径. 动物浮游生物群落在冰下壮成长,表现出由分层和光线影响的季节性变化.
科学领域:
- 临界技术 临界技术
- 水生生态学 水生生态学
- 微生物生态学 微生物生态学
背景情况:
- 湖泊生态系统在被冰覆盖的时期没有得到充分的研究,尽管正在进行物理,水力学和生物过程.
- 冰盖显著改变湖泊条件,影响热分层,太阳辐射,并支持独特的生物和食物网.
研究的目的:
- 为了研究生物质的季节性变化和微生物和动物浮游生物在冬季北极湖的垂直分布.
- 了解浮游生物群落,岩石学特征和冰盖下的水力动力学之间的关系.
主要方法:
- 从2020年11月到2021年4月的六个日期,在五个深度对北极西蒙库什湖进行采样.
- 分析温度,溶解氧气,甲和浮游生物 (异质型细菌,皮可自otrophs,纳米鞭,动物浮游生物).
主要成果:
- 低叶绿素-a和高的异质与自质生物质比率表明冰下存在主导的异质能量通路.
- 在明亮的翻转期中,异构型微生物也占主导地位,突出显示了微生物循环的一致作用.
- 动物浮游生物的丰富性在冰下仍然很高,一些物种喜欢更深,更温暖的层,一些物种在冬天保持卵产量.
结论:
- 冬季浮游生物群体表现出强烈的垂直和季节性异质,受分层,光线和资源的影响.
- 这项研究支持这样一个观点,即冬季是湖泊生物动态的时期,对下一个开放水域季节有影响.
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