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在气候变化下,鱼在关键生命阶段易受每月温度变化的影响
Noémie Coulon1, Stanislas Pilet1, Anne Lizé2
1Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) MNHN, CNRS, IRD, SU, UCN, UA, Station Marine de Dinard, Dinard, France.
Marine environmental research
|May 2, 2024
概括
变暖和酸化严重影响小斑点鱼胚胎,在预计的2100气候场景下大幅减少化成功. 胚胎在生长和部发育方面扎,突出显示了气候变化的脆弱性.
科学领域:
- 海洋生物学 海洋生物学
- 气候变化 生态学 生态学
- 鱼类生理学 鱼类生理学
背景情况:
- 海洋变暖和酸化对海洋生态系统构成重大威胁.
- 了解特定物种对气候变化的反应对于保护至关重要.
- 小斑点鱼 (Scyliorhinus canicula) 是温带海洋环境中的一个关键标志物种.
研究的目的:
- 评估预计的海洋变暖和酸化对小斑点鱼生命早期阶段的综合影响.
- 区分个人和团体对气候变化情景的反应.
- 评估胚胎和新出的鱼对未来气候条件的脆弱性.
主要方法:
- 一项为期10个月的实验研究,将鱼胚胎暴露在控制,SSP2-4.5和SSP5-8.5气候场景中.
- 监测化成功,个体生长轨迹,黄体消耗和部发育.
- 分析季节性温度波动及其对胚胎发育的影响.
主要成果:
- 在SSP5-8.5情景下,与对照和SSP2-4.5 (82%) 相比,化成功率急剧下降 (11%).
- 胚胎死亡率与减少黄黄的消费,较低的生长率和对内部的转变受损有关.
- 在治疗过程中,观察到显著的个体间生长和发育变化.
- 在6个月的观察期内,由于温度降低,没有观察到化后的死亡率.
结论:
- 鱼胚胎非常容易受到未来气候变化情景中预测的夏季气温升高的影响,特别是高排放的SSP5-8.5.5.
- 损伤的生理过程,包括能量同化和部发育,是胚胎失败的关键因素.
- 个体的变异性在气候变化弹性方面发挥着作用,但恶劣的条件可能会压倒适应能力.
- 虽然在本研究中,化后的生存没有受到较低温度的影响,但胚胎阶段在气候变化下代表了这一物种的关键瓶.
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