鱼幼虫面临的气候挑战:交互式多重压力效应损害了大西洋幼虫的适应潜力
Andrea Franke1, Till Bayer2, Catriona Clemmesen2
1Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Im Technologiepark 5, 26129 Oldenburg, Germany; Alfred-Wegener-Institute, Helmholtz-Centre for Polar and Marine Research (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany.
The Science of the total environment
|August 24, 2024
概括
气候变化的压力因素,如热浪和细菌,会伤害大西洋鱼幼虫. 综合作用会损害基因反应并改变肠道微生物,威胁生存并导致人口减少.
科学领域:
- 海洋生物学 海洋生物学
- 气候变化影响气候变化的影响.
- 鱼类发展生物学 鱼类发展生物学
背景情况:
- 鱼类的早期生命阶段对环境变化非常敏感.
- 气候变化压力因素对鱼幼虫的综合影响尚不清楚.
- 温度上升可能会增加细菌的毒性,对水生生物构成威胁.
研究的目的:
- 调查春季热浪和细菌暴露对大西洋鱼 (Clupea harengus) 幼虫的相互作用影响.
- 评估对基因表达,microRNA概况,微生物群组成,生长和生存的影响.
- 了解对西波罗的海地区春季产鱼招募的影响.
主要方法:
- 大西洋鱼蛋和幼虫在正常和高温坡道下养.
- 幼虫被暴露在Vibrio alginolyticus和Vibrio anguillarum. 这两种病毒中.
- 分析了mRNA和miRNA转录组,微生物群组成,生长和生存.
主要成果:
- 高温和细菌暴露单独降低基因表达的调节,可能阻碍细胞增殖.
- 热量和Vibrio暴露的交互作用导致基因表达的变化最小,这表明适应能力受损.
- 这两种压力因素都改变了miRNA表达,并显著改变了幼虫微生物群的组成,而变暖减少了微生物多样性.
- 高温和细菌暴露对幼虫的生长和生存产生了负面影响.
结论:
- 大西洋鱼幼虫对气候变化相关的压力因素非常敏感.
- 环境因素的互动影响可以超过幼虫的压力值,损害关键的适应反应.
- 这些损害可能导致西波罗的海春季产卵鱼招募的下降.
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