基础物种的频繁干扰会破坏巨型海藻森林中消费者介导的营养循环
Joseph R Peters1, Daniel C Reed1, June Shrestha2
1Marine Science Institute, University of California, Santa Barbara, California, USA.
Ecology
|March 11, 2025
概括
扰乱巨型海藻森林减少了消费者的营养循环. 虽然海藻的丧失减少了营养需求,但它促进了地下藻类的生长,整体营养供应受到息地丧失的影响.
科学领域:
- 海洋生态海洋生态学
- 生态系统动力学 生态系统动力学
- 基金会物种研究研究基金会物种研究
背景情况:
- 基础物种,如巨型海藻,提供了关键的息地,并由消费者介导的营养动力学 (CND) 支持.
- 基础物种和消费者之间的相互反是至关重要的,但受到干扰的威胁,需要进行长期研究.
- 了解这些动态对于海藻森林的健康至关重要,尤其是在营养有限的时期.
研究的目的:
- 通过实验评估巨型海藻干扰对相关动物群体中CND的影响.
- 评估海藻干扰如何影响营养反,在低酸盐条件下维持初级生产.
- 量化氨排泄的变化,需求,以及排泄满足需求的比例.
主要方法:
- 在四个地点每年移除10年巨型海藻,以模拟频繁的波浪干扰.
- 监测海藻森林社区在采摘和控制场地的变化.
- 估计特定类别的氨排泄率 (鱼类,无脊椎动物) 和需求 (,大藻类).
主要成果:
- 巨型藻类的干扰使的整体分泌量减少了66%,主要是由于鱼类的数量减少.
- 的需求减少了56%,而地下大藻的需求增加了147%,这是由于丰富度增加.
- 干扰对消费者排泄所满足的宏藻需求总比重的影响很小.
结论:
- 消费者介导的营养动态为海藻森林提供了重要的贡献.
- 频繁的干扰减少了的重要息地,导致营养投入减少.
- 相互反易受干扰,影响树林生态系统的稳定性.
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