人类通过黎凡特从非洲分散出去
Mahmoud Abbas1, Zhongping Lai1, John D Jansen2
1Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou 515063, China.
Science advances
|October 4, 2023
概括
早期人类从非洲迁移的原因在于,在最后一次冰河间期间,南方Levant的湿地更加湿. 来自湿地沉积物和文物的证据支持这条进入西亚的关键传播路线.
科学领域:
- 古人类学古人类学.
- 四年纪地质学四年纪地质学
- 考古学的考古学
背景情况:
- 智人从非洲迁移到欧亚大陆发生了多次在中期和晚期普莱斯托纪时代.
- 非洲东北部到黎凡特的路线是早期人类分散的潜在陆地走廊.
- 南方Levant的过去的环境条件在间冰期可能支持迁移.
研究的目的:
- 为了调查在最后的间冰期期间南方Levant的环境条件.
- 为水分的可用性及其在早期人类迁徙路线中的作用提供证据.
- 迄今为止,该地区的湿地沉积物和相关的考古发现.
主要方法:
- 瓦迪加兰达尔湿地沉积物的沉积物学分析.
- 光学刺激发光 (OSL) 测定沉积物的年代.
- 莱瓦洛瓦文物考古文献. 莱瓦洛瓦文物.
主要成果:
- 在瓦迪·加兰达尔 (Wadi Gharandal) 的湿地沉积物的约会结果是84千年前的年龄,这与最后的间冰期有关.
- 在南方的Levant记录了长时间存在水分的证据.
- 在这些已过时的湿地沉积物中发现了Levallois文物.
结论:
- 约旦裂谷在最后的间冰期很可能是受水的,作为人类迁徙的关键道.
- 这些发现支持了Homo sapiens向西亚和阿拉伯传播的可行陆地途径的假设.
- 这项研究强调了古环境重建对于了解早期人类分散模式的重要性.
相关概念视频
00:53Migration
7.9K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
7.9K
02:39Gene Flow
35.2K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
35.2K
02:16Genetics of Speciation
19.3K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.3K
02:29Hybrid Zones
17.1K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
17.1K
01:07Speciation Rates
21.2K
Overview
21.2K
03:33Genetic Drift
39.8K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.8K