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发育温度,而不是长期进化,定义了河口足的热耐受性
Lauren Ashlock1, Chelsea Darwin1, Jessica Crooker1
1Department of Biology University of Vermont Burlington Vermont USA.
海洋变暖增加了copepods的热耐受性,但盐度的变化可以减少这种弹性. 塑性在这些海洋生物如何应对气候变化压力因素方面发挥着关键作用.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
背景情况:
- 海洋温度上升和盐度波动影响海洋生态系统,特别是在河口.
- 生物体对温度和盐度等多重压力因素的弹性对于人口的生存至关重要.
- 了解短期可塑性和长期适应气候变化的相互作用至关重要.
研究的目的:
- 为了研究温度升高对脚动物*Acartia tonsa*急性耐受温度和盐度变化的影响.
- 确定不同持续时间的温度适应 (一,三,和>40代) 对热量和盐度耐受性的影响.
- 评估温度和盐度压力的互动影响对copepod弹性.
主要方法:
- 使用复制的,长期适应温度的*Acartia tonsa* (环境和海洋变暖条件) 线条.
- 暴露于相互温度处理的一,三,和>40代的copepods.
- 在所有治疗组中评估了对温度和盐度变化的急性耐受性.
主要成果:
- 对海洋变暖 (OW) 的发育暴露和长期适应 (>40代) 显著增加了热耐受性.
- 即使是一代人暴露在OW中,也会导致与较长的适应期相比的热耐受性.
- 低盐度耐受性不受OW适应的影响,但先前的盐度降低降低了热耐受性.
结论:
- 塑性是Acartia tonsa*对气候变化反应的一个关键因素.
- 温度升高提高了耐热性,但由于先前的盐度压力,这种耐热性可能会受到损害.
- 盐度的变化可能会降低类对随后的变暖事件的抵抗力,影响河口食物网.
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