Benthic diel氧的变化和压力是新新生代 - 旧生代动物多样化的潜在驱动因素
Emma U Hammarlund1, Anuraag Bukkuri2,3,4, Magnus D Norling5
1Tissue Development and Evolution (TiDE) Group, Department of Experimental Medical Science, Lund University, Lund, Sweden. emma.hammarlund@med.lu.se.
Nature communications
|March 22, 2025
概括
温暖的温度在古代海洋中造成了压力较大的氧气转移,有利于能够适应这些波动的动物. 这可能解释了动物在坎布里亚爆炸之前的延迟起源.
科学领域:
- 古生物学的古生物学
- 生物地质化学生物地质化学
- 进化生物学 进化生物学
背景情况:
- 动物在新新生态时期的起源早于他们在坎布里亚时期的显著多样化,这个时期的标志是海洋架子面积增加和温室条件.
- 这些环境条件对早期动物生理学和生态学的直接影响仍然不太清楚.
研究的目的:
- 研究环境条件对早期动物进化的影响.
- 在不同温度下的昼夜周期期间,量化沉积物-水界面上的氧气动态.
- 模拟生理特征在应对环境压力的适应性优势.
主要方法:
- 利用生物地球化学模型模拟沉积物-水界面上的氧气动态.
- 采用人口和表型模型来评估生物体对氧气波动的适应性.
- 在温暖和寒冷的温度条件下比较氧气动态.
主要成果:
- 温暖的温度诱导了在富含营养的架子上的沉积物-水界面的生理压力较高的日间氧-无氧转移.
- 发现,有效的细胞氧气传感用于应激适应的好处超过了它们的代谢成本.
- 白天盆地氧化还原变异性随着新新生代晚期和古生代早期的大陆洪水而增加.
结论:
- 从日间氧气波动的生理压力,加上丰富的资源,可能驱动了早期动物的适应性辐射.
- 这种环境压力可以解释动物起源和坎布里亚时代的多样化之间的进化滞后.
- 这些发现突出了环境变异性在塑造早期动物进化中的关键作用.
相关概念视频
02:35What is Evolutionary History?
36.0K
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.
36.0K
01:07Speciation Rates
20.9K
Overview
20.9K
02:22The Colonization of Land
34.1K
Changes in the environment of the early Earth drove the evolution of organisms. As prokaryotic organisms in the oceans began to photosynthesize, they produced oxygen. Eventually, oxygen saturated the oceans and entered the air, resulting in an increase in atmospheric oxygen concentration, known as the oxygen revolution approximately 2.3 billion years ago. Therefore, organisms that could use oxygen for cellular respiration had an advantage. More than 1.5 years ago, eukaryotic cells and...
34.1K
02:56The Fossil Record
24.8K
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...
24.8K
01:06Primary Production
23.5K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.5K
02:55The Evidence for Evolution
42.2K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
42.2K