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在海洋浮游生物群落中保持高碳的食物网结构

Hee Chang Kang¹, Hae Jin Jeong¹, Jin Hee Ok¹

¹School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, South Korea.

Science advances

|December 15, 2023

概括

底部有浮游植物的海洋食物网 (底部重型金字塔) 保留了更多的碳生物质. 这种结构具有弹性,在掠食或迁移的暂时干扰后恢复正常.

科学领域:

海洋生态海洋生态学
海洋学海洋学海洋学
生物地质化学生物地质化学

背景情况:

海洋和陆地生态系统具有相似的净初级产量.
捕食大大减少了海洋浮游植物生物质,将其转化为二氧化碳.
了解浮游生物的食物网结构是海洋碳保留的关键.

研究的目的:

为了确定哪种浮游生物食物网结构最好地保留全球海洋中的碳生物质.
研究不同食物网结构在掠食和迁移压力下的稳定性.

主要方法:

分析了6954个含有植物浮游生物,原生浮游生物和超生浮游生物的全球海洋样本.
在植物浮游生物主导 (底部重),原生浮游生物主导 (中部重) 和元生浮游生物主导 (顶部重) 的食物网结构中,碳生物质的比较.

主要成果:

植物浮游生物占主导地位,底部繁重的食物网表现出更高的碳生物质.
原生浮游生物和超生浮游生物垂直迁移的掠食导致临时转移到中重或顶重结构.
这些改变的结构始终恢复到底部重型金字塔.

结论:

在海洋浮游生物群落中,以浮游生物为基础的,底部沉重的食物网对于维持高碳生物质至关重要.
这些结构表现出性和干扰后自我纠正的能力.
这些发现对了解海洋碳循环和碳储存具有重大意义.

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