污染抵消了自然人群中热耐受性增加的快速演变
Ying Dong1, Marlies Van de Maele1, Luc De Meester2
1Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Debériotstraat 32, B-3000 Leuven, Belgium.
The Science of the total environment
|May 11, 2024
概括
全球变暖推动了水的热耐受性快速演变. 然而,这种适应性受到污染的影响,否定了热生存的好处,并突出了污染污染.
科学领域:
- 环境毒理学环境毒理学
- 进化生物学是进化的生物学.
- 生态生态学 生态生态学
背景情况:
- 全球变暖正在加速自然种群的进化适应.
- 污染是一个重要的,但往往被忽视的环境压力因素.
- 进化救援可能会受到适应变暖和污染之间的权衡的限制.
研究的目的:
- 为了研究大的热耐受性和耐受性之间的进化权衡.
- 为了确定耐热度的快速演变是否会影响对常见金属污染物的耐受性.
- 评估热和暴露对演化热耐受性的综合影响.
主要方法:
- 利用了40年间隔的Daphnia magna的两个亚种群,反映了适应热浪频率增加的情况.
- 评估了与老年人相比,最近的子群体的演化热耐受性.
- 测试了暴露对耐热度和生理参数 (净能源预算,糖含量) 的影响.
主要成果:
- 最近的Daphnia magna亚种群表现出明显演变的更高的耐热性.
- 在最近的亚群中观察到对的敏感性增加,包括减少的净能源预算和耐热性.
- 进化的耐热优势在最近的亚种群中完全被暴露所否定.
结论:
- 耐热性的快速演变可以通过对其他压力因素 (如金属污染) 的耐受性进行权衡来限制.
- 变暖和污染的综合影响可能比单独的变暖对物种生存构成更严重的挑战.
- 目前对全球变化下的进化救援的评估可能高估了物种在污染环境中的适应能力.
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