由于温带珊瑚礁的热带化,碳酸盐预算的分歧
Océane Attlan1, Thomas Wernberg1,2, Georgina Wood1,3
1UWA Oceans Institute & School of Biological Sciences, The University of Western Australia, Perth, Western Australia6009, Australia.
Proceedings. Biological sciences
|January 15, 2026
概括
温带树林的热带化改变了碳酸盐的生产. 珊瑚草礁的碳酸盐产量很高,而海藻礁的产量非常低,影响沿海生态系统.
科学领域:
- 海洋生态海洋生态学
- 气候变化生物学 气候变化生物学
- 生物地质化学生物地质化学
背景情况:
- 气候变化正在推动海洋物种分布的转变,导致温带生态系统的"热带化".
- 生息地形成的物种变化,比如海藻森林被草藻类和珊瑚所取代,影响生态系统功能.
- 化生物对于沉积物生成和通过碳酸生产的碳循环至关重要.
研究的目的:
- 量化碳酸盐生产和侵蚀在温带海藻森林和热带珊瑚礁国家.
- 评估息地转移对化生物及其在碳循环中的作用的影响.
- 了解热带化如何影响沿海珊瑚礁生态系统中无机碳的可用性.
主要方法:
- 在四个不同的珊瑚礁状态中对碳酸盐预算进行比较研究:温带海藻森林,海藻-草皮混合物,更温暖的亲属性海藻和珊瑚-草皮优势.
- 总碳酸盐产量和生物侵蚀率的量化.
- 在每个息地中确定主导的化物种和生物侵蚀剂.
主要成果:
- 碳酸盐总产量有显著的差异:在珊瑚草礁 (1.85公斤 m-2 yr-1) 中最高,在海藻森林 (0.60公斤 m-2 yr-1) 中中间,在更温暖的亲属性海藻礁 (0.04公斤 m-2 yr-1) 中最低.
- 生产的差异与珊瑚和化藻类的丰富程度有关.
- 生物侵蚀速度有所不同,热带珊瑚礁的鱼的贡献大大超过温带珊瑚礁的.
结论:
- 热带化对碳酸盐可用性的影响是可变的,取决于占主导地位的息地形成物种.
- 息地结构的变化可以显著改变无机碳循环和珊瑚礁完整性.
- 了解这些变化对于预测气候变化下的沿海珊瑚礁生态系统的未来至关重要.
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