相关实验视频

Updated: Jun 12, 2025

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Measurement 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

土壤的多样性和活动 N₂O-减少城市化形成的细菌

Le-Yang Yang^1,2,3, Shun Li^1,3, Hua-Yuan Shangguan^1,2,3

¹Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.

Environmental science & technology

|September 18, 2024

概括

城市化影响氧化 (N₂O) 减少细菌群落. 非典型的nosZII细菌对环境变化更敏感,更好地适应城市干扰,可能减轻N2O排放.

科学领域:

环境微生物学环境微生物学
土壤生态学土壤生态学
温室气体减排温室气体减排

背景情况:

氧化 (N₂O) 是一种具有重要的人为来源的强有力的温室气体.
由nosZI和nosZII基因编码的N₂O减少酶 (N₂OR) 酶对于N₂O减少至关重要,作为主要的沉降器.
不同基层的分布和生态作用,特别是在城市化下,尚未得到充分理解.

研究的目的:

调查城市化梯度上的nosZI和nosZII集群的分布和社区聚集.
为了确定环境因素 (如pH值) 对N₂O-减少细菌群体的影响.
了解城市环境中N₂O减排细菌的适应策略,特别是非典型的N_{ZII,以减轻N₂O排放.}

主要方法:

从中国东部八个省份的森林,公园和农田采集土壤样本.
高通量测序以区分和量化NOSZ I和NOSZ II细菌群体.
包括结构方程建模 (SEM) 和相关性分析在内的统计分析,以确定关键的环境驱动因素.

主要成果:

社区的集合主要是由决定性的过程驱动的,特别是同质的选择.
两种群体对同质和异质选择都表现出敏感性,这表明它们对环境波动有更大的适应能力.
土壤pH被确定为影响NOSZ I和NOSZ II群体社区组成的重要因素.

结论:

城市化创造了多样化的利基,有利于N₂O-减少细菌的适应,特别是更敏感的NOSZII类.
这项研究强调了非典型脱剂 (nosZII) 在城市土壤生态系统中的关键作用.
了解这些微生物群落对于制定减轻城市土壤N₂O排放的战略至关重要.

关键词:

减轻N2O污染的方法减少N2O的细菌可以减少N2O.我们的鼻子ZIZI 我们的鼻子.土壤息地土壤息地城市生态系统的城市生态系统

更多相关视频

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Published on: December 6, 2018

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

相关概念视频

Overview of Nitrogen Metabolism

Overview of Nitrogen Metabolism

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 Roles of Bacteria and Fungi in Plant Nutrition

The Roles of Bacteria and Fungi in Plant Nutrition

Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.

The Nitrogen Cycle

The Nitrogen Cycle

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...

Bioremediation

Bioremediation

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.

The Soil Ecosystem

The Soil Ecosystem

Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components: