深度和温度变化的重要性作为珊瑚共生体组成的驱动因素,尽管发生了大规模漂白事件
Mariana Rocha de Souza1, Carlo Caruso2, Lupita Ruiz-Jones3
1Hawai'i Institute of Marine Biology, School of Ocean and Earth Science and Technology, University of Hawai'i at Mānoa, Kāne'ohe, HI, 96744, USA. mrds@hawaii.edu.
Scientific reports
|June 2, 2023
概括
珊瑚漂白事件可以转移珊瑚中的藻类共生群体,有利于耐热类型,如Durusdinium. 然而,长期的环境条件可能会限制珊瑚礁的共生体组成的整体变化.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
背景情况:
- 珊瑚礁面临着气候变化带来的重大威胁,特别是破坏珊瑚-藻类共生的热应激,导致珊瑚漂白.
- 珊瑚漂白涉及珊瑚组织内共生藻类 (Symbiodiniaceae) 的丧失,导致颜色丧失和潜在的珊瑚死亡.
研究的目的:
- 调查海共生体社区组成的细度动力学在蒙蒂波拉大头之前和之后,在Kane'ohe湾,夏威夷的一个主要的珊瑚漂白事件.
- 为了确定环境因素的影响,如深度和温度变化,与珊瑚漂白有关的Symbiodiniaceae社区组成.
主要方法:
- 重复采样600个单独标记的Montipora capitata殖民地,以比较藻类共生体组成.
- 分析了对2019年漂白事件和环境参数的反应对共生动物社区组成的变化.
主要成果:
- 在白化事件发生后,观察到耐热共生体Durusdinium的相对比例普遍增加.
- 尽管Durusdinium的丰富度发生了变化,但藻类共生体社区的整体组成在水力动力学定义的区域内基本保持不变.
- 深度和温度的变化解释了Symbiodiniaceae社区组成在不同地点的差异约21%.
结论:
- 珊瑚共生体组成表现出一些可塑性,在漂白后耐热共生体的增加.
- 这项研究表明,长期的环境条件可能会限制珊瑚全生物体的适应潜力,而不管个体的漂白反应如何.
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