海洋温度变化的代际影响:早期生活的好处是短暂的,在三脊杆背脊
Helen Clare Spence-Jones1, Carla M Pein1, Lisa N S Shama1
1Coastal Ecology Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, List, Germany.
PloS one
|August 2, 2024
概括
父母暴露于温度变化给后代带来了有限的好处,在环境变化增加的情况下,一些早期生长优势在增加的环境变化下丧失. 在这项研究中,没有清楚地观察到投注对冲策略.
科学领域:
- 进化生物学是进化的生物学.
- 环境科学环境科学
- 遗传学 遗传学 是一个
背景情况:
- 气候变化模型预测温度变化增加和极端天气事件.
- 生物必须适应不断变化的环境条件.
- 非遗传遗传,或代际可塑性,可以影响后代的适应.
研究的目的:
- 为了研究环境变化的代际影响,对三脊 (Gasterosteus aculeatus).
- 为了确定家长是否在应对增加的环境变化时使用投注对冲策略.
- 评估适应性响应环境平均值和变化的变化.
主要方法:
- 一个全因数的,分离离合实验是使用三条脊柱的stickleback进行的.
- 父母和后代被暴露在三个温度模式下:恒定,自然变化和增加的变化.
- 分析了后代的生长,形态,卵子大小和离合体大小.
主要成果:
- 增加的温度变化会在一代内减少后代的生长.
- 父母暴露在自然温度变化中,为后代提供了一些早期生长的好处.
- 这些代际影响并没有持续到生命的后期阶段.
- 没有发现母亲塑性改变后代表型变异 (蛋/离合体大小) 的证据.
- 幼鱼形态的较低变异表明在自然种群中可能存在保守的投注对冲.
结论:
- 父母暴露于温度变化对后代的健康相关特征的影响有限.
- 自然环境的变化促进了早期发育中的适应性代际反应.
- 在环境变化增加的情况下,这种适应效应会消失.
- 在这个实验设置中,针对温度变化的塑料投注对冲策略的证据有限.
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