海洋中的度图案C:N:P反映了浮游植物的适应和宏分子组成
Justin D Liefer1, Angelicque E White2, Zoe V Finkel3
1Department of Biology, Mount Allison University, Sackville, NB E4L 1G7, Canada.
概括
海洋中的颗粒物
科学领域:
- 海洋生物地质化学海洋生物地质化学
- 大洋碳循环的海洋碳循环
- 浮游生物生态 浮游生物生态
背景情况:
- 有机颗粒物的元素比率 (C:N:P) 与海洋中的红场比率有所不同.
- 在海洋C:N:P中存在度模式,但其驱动因素尚不清楚.
- 了解这些模式对于全球碳储存和深海运输至关重要.
研究的目的:
- 研究北太平洋地表水域度C:N:P模式的驱动因素.
- 确定宏分子组成在解释观察到的C:N:P变化的作用.
- 阐明生理和社区结构变化对这些模式的贡献.
主要方法:
- 收集了关于粒子C:N:P,宏分子组成,环境条件和浮游生物群体结构的高分辨率数据.
- 在横跨北太平洋过渡区的横断线上分析数据.
- 将现场数据与培养实验和基于分配的模型进行比较.
主要成果:
- 颗粒的宏分子组成直接解释了观察到的C:N:P模式.
- 从亚热带到亚极地区的C:N颗粒物减少与相对于碳水化合物和脂质的蛋白质增加有关.
- C:P和N:P的变化与蛋白质与核酸和聚酸相比的变化有关.
结论:
- 植物浮游生物对不断变化的营养供应的生理适应是度C:N趋势的最可能原因.
- 大分子组成为大规模的C:N:P变化提供了机械和生化基础.
- 这项研究提供了关于海洋中碳,和的生态化学循环的见解.
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