快速热带化证据显示,沿沿海岸过渡区的海藻聚集在潮下
Jonas de Azevedo1,2,3, João N Franco1,3, Cândida G Vale1
1CIIMAR - Centro Interdisciplinar de Investigação Marinha e Ambiental, Terminal de Cruzeiros do Porto de Leixões, University of Porto, Matosinhos, Portugal.
Scientific reports
|July 20, 2023
概括
气候变化正在导致葡萄牙沿海沿岸海洋物种分布的快速变化. 海水温度上升正在增加温暖亲和物种,并改变海藻群落,表明"快速热带化".
科学领域:
- 海洋生态海洋生态学
- 气候变化生物学
- 海洋学 海洋学 海洋学
背景情况:
- 人为气候变化,特别是海水变暖,预计将导致海洋物种分布的快速变化.
- 生物地理过渡区特别容易受到这些分布转移的影响.
- 葡萄牙大陆海岸,尽管规模较小,但由于伊比利亚上游而具有强烈的物理梯度,为北极和卢西塔尼亚-地中海起源的海藻物种创造了一个过渡区.
研究的目的:
- 评估葡萄牙沿海的潮下海藻群体最近的变化.
- 评估海水温度上升对物种分布和社区结构的影响.
- 调查气候变化对沿海海洋群体影响的证据.
主要方法:
- 利用了2012年现有的丰度数据.
- 2018年在同一地区进行了新的抽样计划.
- 分析了宏藻群,物种丰富,多样性,生物质和社区温度指数 (CTI) 的变化.
主要成果:
- 在宏藻群中证实了度梯度.
- 在六年内观察到海藻社区的显著结构和功能变化.
- 记录了温暖亲和物种 (如草藻类) 的区域性增加,以及物种丰富度,多样性,生物量和CTI的增加.
结论:
- 葡萄牙海岸的低潮海藻群体在短时间内发生了重大变化.
- 观察到的变化,包括温暖亲和物种的增加,提供了强有力的证据,表明由于人类气候变化的"快速热带化".
- 沿海海洋群体受到海水温度上升和气候变化影响的重大影响.
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