保护偏见掩盖了逐渐的奥尔多维纪珊瑚礁演变
Juwan Jeon1,2, Qi-Jian Li3,4, Jeong-Hyun Lee5
1Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea.
概括
大奥尔多维纪生物多样化事件 (GOBE) 由于海平面下降而突然出现,抹去了化石记录. 这种分层结构的不完整性创造了一个幻觉,掩盖了珊瑚礁建造者的更渐进的进化轨迹.
科学领域:
- 古生物学的古生物学
- 在平流体学上,平流体学是平流体学.
- 进化生物学 进化生物学
背景情况:
- 大奥尔多维纪生物多样化事件 (GOBE) 传统上被视为珊瑚礁构建元动物的突然多样化.
- 这种明显的爆发挑战了渐进的进化模型.
- GOBE的时间,大约4.6亿年前,表明一个快速的进化事件.
研究的目的:
- 调查保护偏差在GOBE的突然感知中的作用.
- 重新评估早期珊瑚礁建造者的进化轨迹.
- 了解地层学不完整性对解释重大进化事件的影响.
主要方法:
- 集成地层学数据与化石发生记录.
- 在中期奥尔多维纪时期对不一致性和海平面波动的分析.
- 碳酸盐沉积,保存和珊瑚礁构建事件之间的相关性.
主要成果:
- 显而易见的GOBE爆发在很大程度上是全球海平面下降 (约475至460万年前) 的产物.
- 在此期间,广泛的不一致性和侵蚀消除了早期珊瑚礁建造者的化石记录.
- 在大平纪 (471469万年前) 期间,碳酸盐的最小沉积和化石的出现突显了保存偏差.
结论:
- GOBE不是一个离散的进化事件,而是由海平面波动影响的连续轨迹.
- Stratigraphic不完整,被称为"Sppil-Rongis效应",扭曲了对GOBE在珊瑚礁生态系统中的理解.
- 早期的珊瑚礁建造者可能比以前想象的更早地实现了多样化,他们的记录被地质过程所掩盖.
更多相关视频
10:39Multimodal Optical Microscopy Methods Reveal Polyp Tissue Morphology and Structure in Caribbean Reef Building Corals
Published on: September 5, 2014
12.4K
05:58Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations
Published on: July 21, 2023
2.1K
相关概念视频
The Fossil Record
25.7K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
25.7K
Speciation Rates
21.4K
Overview
21.4K
What is Evolutionary History?
40.1K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
40.1K
Diversity of Protists III
139
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
139
Diversity of Protists IV
133
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
133
Diversity of Protists II
149
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
149
