相关实验视频
Updated: May 11, 2025
06:58
High-Throughput Assays of Critical Thermal Limits in Insects
Published on: June 15, 2020
5.1K
突发干旱的发育时间影响了野外后代的生存率
Ayley L Shortridge1, Morgan A Clark2, Paulette Gutierrez2
1Ecology, Evolution, & Behavior Program, Department of Integrative Biology, W. K. Kellogg Biological Station, Michigan State University, Hickory Corners, MI, USA. ayley.shortridge@gmail.com.
Oecologia
|April 17, 2025
概括
胚胎发育期间的突然干旱会伤害普通的鱼. 晚期干旱暴露显著降低了野外化幼的生存率,表明气候变化增加了死亡风险.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 发育生物学 发展生物学
背景情况:
- 由于人为气候变化,极端气候事件,如突然干旱,正在增加.
- 虽然已知对植物和无脊椎动物的影响,但对脊椎动物的生态后果,特别是在胚胎发育期间,理解程度较低.
- 在发育过程中,急性水力压力会影响后代的特征和随后的生存,但这还没有得到充分的研究.
研究的目的:
- 研究模拟暴干事件对普通鱼 (Chelydra serpentina) 的胚胎发育和化后生存的影响.
- 确定在发育过程中突然干旱暴露的时间如何影响后代的生长,表型和现场生存.
- 评估脊椎动物早期生命阶段对极端气候事件的脆弱性.
主要方法:
- 结合实验室实验与大规模现场试验,使用普通的鱼作为模型卵性脊椎动物.
- 卵子在不同的胚胎发育阶段被暴露在模拟的快速干旱条件下.
- 在化后迁移期间测量了后代的生长,表型和生存率.
主要成果:
- 在胚胎发育中期到晚期的突然干旱导致卵子质量,化时间和化体型的减少.
- 在胚胎发育晚期暴露于突然干旱显著降低了在野外化后的生存率.
- 水性应激的发育时间极大地影响后代的生存能力.
结论:
- 在脊椎动物胚胎发育期间出现的突然干旱会对后代的生存造成严重后果.
- 晚期胚胎暴露于干旱条件对野外生存尤其有害.
- 快速干旱的频率和强度增加对脊椎动物种群构成重大威胁,特别是在生命早期阶段,需要在气候变化影响评估中考虑发展背景.
相关概念视频
02:41Responses to Drought and Flooding
10.5K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.5K
01:57Adaptations that Reduce Water Loss
25.0K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.0K
02:45Responses to Heat and Cold Stress
13.2K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.2K