评估有害微藻的全球分布和风险:重点关注三种有毒的亚历山大恐龙
Wenjia Hu1, Shangke Su1, Hala F Mohamed2
1Key Laboratory of Marine Ecological Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China.
The Science of the total environment
|July 14, 2024
概括
来自恐龙虫的有害藻类繁殖 (HAB) 威胁着海洋生态系统. 这项研究绘制了HAB物种息地的地图,确定了关键的环境驱动因素,并评估了全球风险,这对于管理和缓解努力至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 海洋学 海洋学 海洋学
背景情况:
- 有害的恐龙和它们的繁殖对海洋生物和人类健康构成重大风险.
- 全球海洋生物地图往往忽略了关于有害微生物的关键数据,如恐龙虫.
- 有害藻类繁殖 (HAB) 的频率和严重程度不断增加,需要更好地了解它们的分布和驱动因素.
研究的目的:
- 使用分子纠正的发生数据,绘制亚历山大属 (A. catenella,A. minutum,A. pacificum) 中关键HAB物种的息地图.
- 确定影响这些亚历山大物种分布的主要环境驱动因素.
- 开发一种基于息地适宜性的定性方法,用于空间评估有害藻类风险.
主要方法:
- 利用MaxEnt,随机森林和集体建模技术来预测物种分布.
- 修正了现有的物种发生记录,使用分子标准来提高准确性.
- 分析了环境变量,包括距离海岸线的距离,水度,海面温度 (SST) 和溶解氧气.
主要成果:
- 确定了关键的环境驱动因素:距离海岸线的距离,水度,SST和溶解氧.
- A.catenella喜欢低SST和高氧气的寒冷区域;A. pacificum更喜欢温暖的SST和温带北太平洋的低氧气.
- A. minutum表现出对SST和氧气水平的广泛适应性.
- 高息地适宜性与记录的HAB发生相关,作为开花风险指标.
结论:
- 沿海温带海洋 (地中海,西北太平洋,南澳大利亚) 面临更高的HAB风险.
- 有害的藻类具有很高的环境耐受性和适应能力,在气候变化和海洋学变化中构成潜在的未来风险.
- 海洋运输是将有害藻类传播到新生态系统的载体.
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