多种压力因素的累积影响影响了临灭绝的海草种群和鱼群
Matthew J Rees1, Nathan A Knott1, Karen L Astles2
1New South Wales Department of Primary Industries, Marine Ecosystems, Fisheries Research, 4 Woollamia Road, Huskisson, NSW, 2540, Australia.
The Science of the total environment
|September 2, 2023
概括
累积效应评估显示,多种压力因素对危的海草 (Posidonia australis) 造成伤害. 减少这些影响对于海草健康,鱼类生物多样性和渔业生产至关重要.
科学领域:
- 海洋生态海洋生态学
- 环境管理环境管理
- 保护生物学 保护生物学
背景情况:
- 沿海生态系统面临着来自人类活动的越来越多的威胁.
- 累积影响评估 (CEA) 用于评估多种压力因素,但它们与生态系统健康的联系往往不清楚.
- 危的海草Posidonia australis容易受到各种人类造成的压力.
研究的目的:
- 在澳大利亚新南威尔士州皮特沃特向澳大利亚南方波西多尼亚 (Posidonia australis) 申请CEA.
- 为了将CEA分数与P. australis范围的变化相关联.
- 评估海草减少对鱼群的级联影响.
主要方法:
- 利用了关于压力因素的空间数据:岸边开发,水质,船只流量和渔业.
- 分析了高分辨率的空中图像 (2005-2019) 来追踪P. australis范围.
- 雇员用诱将远程水下视频用于调查鱼群.
主要成果:
- 在累积效应得分和P. australis范围之间发现了负相关性 (R2 = 22%).
- 已经确定了累积效应的门,超过这个门后,P. australis的损失会加速.
- 海草和非植被地区之间的鱼群不同,稀少的丰富程度与海草的接近有关.
结论:
- 多种压力因素对P. australis产生重大影响,影响鱼类的生物多样性和渔业.
- 首席执行官可以通过确定关键压力因素值来告知管理层.
- 减少累积影响对于保护海草生态系统及其相关的生态和经济效益至关重要.
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