侵袭性鱼类和海驱动了地中海东部大形成大的地位
Athanasios Nikolaou1, Konstantinos Tsirintanis1, Gil Rilov2,3
1Department of Marine Sciences, University of the Aegean, 81100 Mytilene, Greece.
Biology
|June 28, 2023
概括
像Cystoseira这样的地中海树冠藻类正在减少,影响了珊瑚礁的生物多样性. 迫切需要进行保护,以保护这些重要的沿海息地免受入侵物种和过度放牧的影响.
科学领域:
- 海洋生态海洋生态学
- 沿海息地恢复 沿海息地恢复
- 地中海生物多样性 地中海的生物多样性
背景情况:
- 树冠形成的大藻类,如Cystoseira sensu lato,对于岩石礁的复杂性,生物多样性和生产力至关重要.
- 地中海沿海生态系统面临着人类造成的压力带来的重大威胁,导致大藻类的消失.
- 近几十年来,这些重要息地的生态状况一直在下降.
研究的目的:
- 评估爱琴海和Levantine海中的鱼类生物量,海密度和宏观藻类社区结构.
- 调查Cystoseira sensu lato森林的生态状况以及影响它们分布的因素.
- 为了确定树冠藻存在,食草鱼和入侵物种之间的相关性.
主要方法:
- 在爱琴海和Levantine海域进行实地调查,收集关于鱼类生物质,海密度和大藻分布的数据.
- 在不同深度的宏藻群体的生态状况评估.
- 使用通用线性混合模型 (GLMMs) 进行统计分析,以确定关键的生态驱动因素.
主要成果:
- 与北爱琴海相比,在南爱琴海和Levantine海域,食草鱼鱼类生物量更高.
- 海的密度非常低,这表明在南爱琴海和Levantine地区潜在的当地种群崩.
- 南爱琴海和Levantine地区的宏观藻类群体表现出低或非常低的生态状况,在2米以下的深度基本上没有树冠藻类.
- 树冠藻的存在与入侵性Siganus spp.生物量有负相关性. 还有海.
结论:
- 在Cystoseira s.l.的衰落. 地中海的森林是一个关键问题,威胁到沿海生态系统的健康.
- 侵入性的食草鱼和海,以及其他压力,导致这些重要的息地丧失.
- 需要采取紧急的保护措施来保护和恢复地中海大藻林及其相关的生物多样性.
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