当食物网架构无法适应海洋变化时,食物金字塔会重新组织
Ivan Nagelkerken1, Silvan U Goldenberg2,3, Camilo M Ferreira2
1Southern Seas Ecology Laboratories, School of Biological Sciences and The Environment Institute, DX 650 418, The University of Adelaide, Adelaide, SA 5005, Australia. ivan.nagelkerken@adelaide.edu.au.
Science (New York, N.Y.)
|August 15, 2020
概括
生态系统难以适应气候变化. 它们的食物网变得不灵活,无法从物种损失或增加中恢复,导致退化.
科学领域:
- 海洋生态
- 气候变化生物学
- 生态系统动态
背景情况:
- 人类活动正在加剧,
- 海洋变暖和酸化是影响海洋生态系统的全球变化压力因素.
研究的目的:
- 在预计的海洋变暖和酸化下调查沿海底层食物网架构的灵活性.
- 确定关键的生态稳定过程是否可以弥补环境变化.
主要方法:
- 使用多种地沿海社区进行了中宇宙实验.
- 这项研究分析了模拟未来气候条件下的食物网结构和功能.
主要成果:
- 食物网架构表现出不灵活,无法弥补种类的下降或扩散.
- 功能冗余,食物补偿和物种替代等关键稳定过程缺失.
- 一个独特的食物金字塔结构出现了,生物质在底部和顶部扩张,但在中心收缩.
结论:
- 不灵活的食物网架构削弱了生态系统适应全球变化的能力.
- 观察到的食物金字塔可能表明生态系统崩之前的过渡状态.
- 持续的非生物压力会导致简化,沉重的底部食物网和生态系统退化.
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