链接海洋变异性,euphausiid热点持久性和加拿大西海岸沿海捕食者分布
Rhian Evans1,2, Stéphane Gauthier1,3, Clifford L K Robinson4
1Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, British Columbia, Canada.
概括
海洋热浪可能会破坏捕食者与猎物的相互作用. 这项研究绘制了加拿大沿海的euphausiids和捕食者的息地热点.
科学领域:
- 海洋生态海洋生态学
- 渔业科学 渔业科学
- 保护生物学 保护生物学
背景情况:
- 了解息地使用和物种聚合是基于生态系统的管理的关键.
- 识别多个物种热点的驱动因素可以为保护战略提供信息.
研究的目的:
- 量化加拿大西海岸的euphausiid和掠食者热点的空间分布和共同发生.
- 为了确定影响这些聚合物生态系统管理的物理驱动因素.
主要方法:
- 使用声学数据 (2007-2018年) 开发了欧类和太平洋鱼的微量时空模型.
- 利用已发表的其他捕食者的物种分布模型.
- 应用 Getis-Ord 统计来定义和分析热点和并发模式.
主要成果:
- 鱼和鱼热点分布每年变化,除了2017年外,几乎没有重叠.
- 2015年的海洋热浪导致了euphausiid和鱼热点之间的空间不匹配.
- 确定了两个不同的捕食者-猎物组合:一个在大陆斜坡 (200-1000m+) 上,另一个在较浅的货架地区.
- 关键聚合区域包括温哥华岛的西海岸,夏洛特女王海峡海谷和海达古瓦伊岛.
结论:
- 种类聚合与深度梯度和海底地形特征有关.
- 已确定为多物种热点的关键区域支持复杂的食物网和商业物种.
- 这些发现为基于生态系统的管理和保护重要的海洋息地提供了关键数据.
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