长期数据显示,在美国主要的河口食物网中,存在广泛的现象变化
Robert J Fournier1, Denise D Colombano1,2, Robert J Latour3
1Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, California, USA.
Ecology letters
|December 31, 2024
概括
气候变化改变了生物的时间,可能导致食物网不匹配. 我们的研究揭示了河口中广泛的现象学变化,物种间的速度不同,破坏了生态平衡.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 河口生态学 河口生态学
背景情况:
- 气候变化正在改变许多物种生命历史事件的时间.
- 如果相互作用的物种以不同的速度作出反应,现象变化可能会导致热量不匹配.
- 以前的研究往往侧重于单一的营养水平,忽视了整个社区的影响.
研究的目的:
- 调查美国三个主要河口的多个营养水平 (植物浮游生物,动物浮游生物,鱼类) 的现象变化.
- 确定种群如何跟踪环境变化的程度,并识别不同的现象反应.
- 评估河口食物网中气候驱动的食物不匹配的可能性.
主要方法:
- 分析了2000多个长期,每月的丰度或生物质数据时间序列.
- 从旧金山湾,切萨皮克湾和马萨诸塞湾收集的数据.
- 统计分析以确定现象学趋势及其与环境变化之间的关系.
主要成果:
- 在所有三个河口的分析时间序列中,28%的现象学变化被观察到.
- 显著比例的种群 (29-68%) 没有表现出跟踪环境变化的现象学趋势.
- 浮游生物的种群通常具有先进的现象学,而鱼类则表现出先进的和延迟的峰值丰度时间.
结论:
- 由于气候变化,河口生态系统正在发生广泛的现象变化.
- 热带水平之间的异异现象反应表明,气候驱动的热带不匹配的可能性很高.
- 这些干扰可能会影响河口食物网的稳定性和功能,即使是局部气候变化标志.
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