取决于性别的现象对气候的反应在物种范围之间有所不同
Yingying Xie1,2,3, Hanna T Thammavong1, Lily G Berry4
1Department of Biological Sciences, Purdue University, West Lafayette, IN 47907.
概括
气候变化改变了植物的开花时间. 男性棉花树的花开得更早,比雌性花对变暖更敏感,影响繁殖.
科学领域:
- 生态生态学 生态生态学
- 植物科学 植物科学
- 气候变化生物学 气候变化生物学
背景情况:
- 人为气候变化正在全球范围内改变植物现象学,影响繁殖和物种相互作用.
- 以前关于现象变化的研究主要集中在动物授粉物种上,使得风授粉物种受到研究不足.
- 在经济和生态上都很重要的风传粉双胞胎物种,在两性之间对气候的现象反应中表现出尚未探索的变化.
研究的目的:
- 为了研究风传粉棉木 (Populus) 种类的现象变异和气候敏感性.
- 检查花现象学在物种,地理范围,性别和不同现象阶段之间如何变化.
- 预测未来的现象变化及其在气候变化情景下对繁殖的影响.
主要方法:
- 利用草药馆的标本和志愿者对棉木物种的观察.
- 分析了与气候变量,特别是春季温度相关的开花和叶子发芽时间.
- 跨物种,性别和地理范围的相对现象敏感性.
主要成果:
- 在木物种内部和物种之间观察到花期和气候敏感性的显著变化.
- 男性的开花较早发生,与女性开花相比,对变暖的敏感性更大.
- 开花的开始对温度更敏感,而不是叶子出来;未来的气候场景预测男性和女性开花之间的时间差距增加.
结论:
- 在风传粉物种中表现出显著的表态和气候反应的特异性和特异性差异.
- 在棉木中观察到现象定时和温度敏感度的性别特异性差异.
- 预测的现象变化可能会影响性繁殖和基因流动,需要考虑生态和进化影响评估.
相关概念视频
02:27Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
02:45Biological Clocks and Seasonal Responses
34.7K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.7K
01:50Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
02:45Responses to Heat and Cold Stress
13.5K
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.
13.5K
01:07Speciation Rates
21.2K
Overview
21.2K
01:17What is a Species?
44.1K
Overview
44.1K