在北极开花期间的气循环:从化学转化到同化
Rafael Laso-Pérez1,2, Juan Rivas-Santisteban2, Nuria Fernandez-Gonzalez2,3
1Biogeochemistry and Microbial Ecology Department, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain.
mBio
|May 12, 2025
概括
北极微生物群落在春季植物浮游植物开花期间从以为基础的化学转变为化学有机,适应获取策略. 这突显了气候变化对北极生物地质化学循环的影响.
科学领域:
- 海洋微生物学 海洋微生物学
- 生物地质化学生物地质化学
- 北极的生态学 北极的生态学
背景情况:
- 北极浮游植物的开花是季节性的,气有限.
- 微生物群落驱动了北极地区的营养循环.
研究的目的:
- 调查北极微生物社区在植物浮游生物繁荣期间的变化.
- 通过使用omics方法,专注于循环.
主要方法:
- 从Dease海峡 (2014年3月至7月) 的样本进行了元基因组和元转录组分析.
- 176个元基因组组装基因组的重建.
- 与循环相关的基因表达的分析.
主要成果:
- 春季初:古生物 (Nitrososphaeria) 表达了氨氧化基因;一种细菌 (Nitrospinota) 氧化了酸盐.
- 植物浮游生物的开花 (五月以后): 化学性有机菌繁殖,利用不同的有机和无机源.
- 夏季:化学基质营养生物减少,转向基于碳水化合物的新陈代谢.
结论:
- 北极微生物群落在开花期间从以为基础的化学甲基向化学有机转型.
- 不同的微生物群体专注于各种源.
- 为了解气候变化对北极气循环的影响提供了基线.
更多相关视频
14:38Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
Published on: April 20, 2012
11.4K
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
6.1K
相关概念视频
01:49The Nitrogen Cycle
51.8K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
51.8K
01:20Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
01:46The Calvin Benson Cycle
4.5K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.5K
00:54What are Biogeochemical Cycles?
31.3K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
31.3K
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
01:06Primary Production
23.6K
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.
23.6K