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在大堡礁上,珊瑚石化程度下降
Glenn De'ath1, Janice M Lough, Katharina E Fabricius
1Australian Institute of Marine Science, Townsville, Queensland 4810, Australia. g.death@aims.gov.au
概括
自1990年以来,大堡礁上的珊瑚化显著下降,这是400年来前所未有的趋势. 这项研究表明,海洋温度上升和阿拉贡石和度降低正在影响珊瑚的生长.
科学领域:
- 海洋生物学 海洋生物学
- 气候科学 气候科学
- 地质化学 地质化学
背景情况:
- 造礁珊瑚因气候变化和海洋酸化而面临生理压力.
- 巨大的波里特珊瑚是关键的珊瑚礁建造者,提供了宝贵的骨记录.
研究的目的:
- 调查大堡礁 (GBR) 的珊瑚化率下降情况.
- 分析珊瑚生长与环境因素,如海面温度和阿拉贡石和度之间的关系.
主要方法:
- 检查了来自328个庞大的波里特珊瑚群落的骨记录,遍布69个GBR礁.
- 分析了与历史海面温度和阿拉贡岩和度数据相关的化和延伸率.
主要成果:
- 自1990年以来,GBR的珊瑚化减少了14.2%,线性延伸减少了13.3%.
- 这种衰退至少在过去的400年里是前所未有的.
- 化与大规模海面温度的线性关系,但对年度温度异常的非线性反应.
结论:
- 观察到的珊瑚化严重下降可能与温度压力增加和阿拉贡石和度下降有关.
- 这些因素可能会降低GBR珊瑚沉积碳酸的能力,威胁珊瑚礁结构.
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