在十年的海洋变暖中,整个大陆的浅礁生命减少
Graham J Edgar1,2, Rick D Stuart-Smith3,4, Freddie J Heather3
1Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia. g.edgar@utas.edu.au.
Nature
|March 23, 2023
概括
海洋物种种群正在减少, 尤其是在温带地区, 对于受威胁的物种和生态系统来说,紧急保护和扩大监测至关重要.
科学领域:
- 海洋生态
- 保护生物学
- 人口动态
背景情况:
- 人类社会依赖于自然生态系统,但如果没有系统的物种种群监测,它们的稳定性是不确定的.
- 尤其缺乏了解海洋物种的波动.
- 珊瑚礁生态系统面临着气候变化和其他人为压力带来的威胁.
研究的目的:
- 评估澳大利亚十多个浅礁物种的种群趋势.
- 为了确定人口变化与环境因素如热浪的关系.
- 评估脆弱海洋物种的灭绝风险.
主要方法:
- 对1057种常见的浅礁物种的种群趋势分析.
- 在过去的10年中从澳大利亚的1636个地点收集数据.
- 人口变化与当地水温和热浪事件的相关性.
主要成果:
- 大多数研究的种群减少,包括热带鱼类,温带无脊椎动物和大藻类.
- 珊瑚的数量相对稳定.
- 在热浪年之后,水温往往下降 (水温高于2008年的0.5°C).
- 种类的丰度发生了变化,在温暖的地区边缘下降,在凉爽的地区边缘上增加.
- 在凉爽的度地区,超过30%的浅无脊椎动物因海洋变暖和极地迁徙的障碍而面临高度的灭绝风险.
结论:
- 温带海洋生态系统面临着不成比例的威胁,
- 扩大对物种种群趋势的监测对于适应环境变化至关重要.
- 需要采取紧急行动来保护海洋生物多样性和生态系统服务.
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