在现场减少与北极气候变化相关的罗多石生长
Sebastian Teichert1, Carl J Reddin1,2, Max Wisshak3
1Lehrstuhl für Paläoumwelt, GeoZentrum Nordbayern, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.
Global change biology
|May 13, 2024
概括
由于海洋温度的上升,北极珊瑚藻 (CCA) 的生长正在下降. 90多年来观察到的这种气候变化影响减少了息地复杂性,并威胁到全球的海洋生态系统.
科学领域:
- 海洋生物学 海洋生物学
- 气候变化科学 气候变化科学
- 生态系统生态学生态学
背景情况:
- 罗多石是由状珊瑚藻 (CCA) 构建的,是北极光区的重要生态系统工程师,创造了复杂的息地.
- 与珊瑚礁不同,罗多石的生长速度极为缓慢 (每年微米).
- 已知气候变化对CCA石骨的影响,但长期现场生长数据很少.
研究的目的:
- 为了研究海洋温度上升对北极罗多石在十年时间尺度上的生长的影响.
- 量化温度升高与罗多石生长率之间的关系.
- 评估气候变化因素对罗多石的潜在协同效应.
主要方法:
- 开发和应用一个时间显式模型.
- 在北极不同深度 (11,27,46米) 的罗多石生长数据的分析.
- 统计分析了近100年来与海水温度波动相关的增长率.
主要成果:
- 在夏季海水温度上升和罗多石生长之间发现了显著的负相关性.
- 每升高1°C的温度都会使生长率平均降低8.9微米/年.
- 在11米和27米深处观察到增长减少,但在46米深处没有显著的增长,因为数据系列较短.
结论:
- 人为气候变化,特别是海洋温度上升,正在破坏北极罗多石的生长.
- 观察到的温度升高可能已经超过了这些CCA的热最佳值,或者其他因素,如海洋酸化和度发挥协同作用.
- 减少罗多石的生长有助于息地丧失,影响全球海洋生物多样性和生态系统功能.
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