海洋酸化和温度升高改变了南极鱼类的行为
María E Lattuca1, María E Barrantes1, Eloísa M Giménez1
1Laboratorio de Ecología, Fisiología y Evolución de Organismos Acuáticos, Centro Austral de Investigaciones Científicas (CADIC-CONICET), Bernardo Houssay 200, V9410BFD Ushuaia, Argentina.
Marine pollution bulletin
|May 10, 2025
概括
气候变化的压力因素,如海洋酸化和温度影响亚南极鱼的行为. 虽然温度会影响活动,但增加的二氧化碳水平会增加Eleginops maclovinus的胆量.
科学领域:
- 海洋生物学 海洋生物学
- 气候变化科学 气候变化科学
- 鱼的行为 鱼的行为
背景情况:
- 海洋鱼的行为受到多种气候变化压力因素的影响.
- 关于这些对高度物种影响的知识缺口存在.
- 亚南极鱼类,如Eleginops maclovinus,面临着独特的环境挑战.
研究的目的:
- 研究海洋酸化和温度对亚南极鱼类 (Eleginops maclovinus) 活动和大胆性的综合影响.
- 了解预测的气候变化场景如何影响这个生态和商业重要物种的关键行为.
主要方法:
- 年轻的Eleginops maclovinus在一个完全的因数设计中被适应到两个温度 (4°C和10°C) 和两个pCO2水平 (∼500和∼1800μatm).
- 行为测试包括一个开放的实地测试,以测量活动水平和游泳速度.
- 一个避难所出现测试评估了鱼的胆量.
主要成果:
- 温度显著影响了活动水平,鱼在10°C时比4°C时活跃1.63倍.
- 海洋酸化 (pCO2) 并没有显著影响整体活动或游泳速度.
- 在pCO2水平升高的情况下,鱼类表现出更大的胆量,在两个测试温度下,它们更快地从避难所出来.
结论:
- 升高的pCO2水平可以增加Eleginops maclovinus的胆量,可能会影响食和捕食者-猎物动态.
- 温度会影响活动水平,但与酸化结合的效应需要对亚南极生态系统进行进一步的研究.
- 由于气候变化的压力因素,这些行为转变可能对亚南极鱼群产生不利影响.
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