当地的人类影响破坏了热带珊瑚礁鱼群的深度依赖区分
Laura E Richardson1, Adel Heenan2, Adam J Delargy2,3
1School of Ocean Sciences, Bangor University, Menai Bridge, UK. l.richardson@bangor.ac.uk.
Nature ecology & evolution
|September 25, 2023
概括
热带珊瑚鱼类生物量显示,在无人居住的地区有可预测的深度划分,而人类的影响在人口密的岛屿上改变了这些模式. 这凸显了在全球变化面前需要重新考虑历史生态模型的必要性.
科学领域:
- 海洋生态海洋生态学
- 鱼类学 鱼类学 鱼类学
- 海洋学 海洋学 海洋学
背景情况:
- 热带珊瑚礁社区的生态组织受到深度梯度 (光,营养素,浮游生物) 的影响.
- 历史生态范式需要重新评估,以解释人类引起的全球变化.
- 关于深度区分的先前研究在广泛的地理区域仍然未经测试.
研究的目的:
- 评估深度梯度是否一致预测整个太平洋的珊瑚礁鱼生物质变化.
- 为了研究水度度对鱼类生物质模式的影响.
- 为了比较人口密与人口密的珊瑚礁位置的生态组织.
主要方法:
- 分析了超过5500个水中珊瑚礁鱼类调查.
- 在0至30米深度的珊瑚礁斜坡上进行的调查.
- 研究地点包括太平洋的35个岛屿.
主要成果:
- 在无人居住的地方观察到可预测的生态组织:浮游动物和鱼类动物生物量增加,主要消费者生物量随着深度的增加而减少.
- 度度显著影响了浮游生物群,这表明与水力动力学和海补贴有关.
- 人类的影响改变或掩盖了人口密地区与深度相关的鱼类生物质模式,可能是由于基线枯竭.
结论:
- 深度区分原则广泛适用,但人类的影响限制了它们在当代生态系统中的预测能力.
- 研究结果强调,需要将人类影响纳入热带珊瑚礁的生态模型.
- 珊瑚礁鱼群体结构是自然梯度和人为压力的敏感指标.
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