Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Metabolism of Chemolithotrophs01:15

Metabolism of Chemolithotrophs

83
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
83
Microbial Nutrition01:28

Microbial Nutrition

171
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
171
Operon Model01:23

Operon Model

72
The operon model represents a fundamental mechanism of gene regulation in prokaryotes, enabling coordinated expression of genes involved in related metabolic or functional pathways. Operons consist of structural genes, a promoter, and an operator, with transcription regulated by repressors, activators, and small effector molecules.Structure and Function of OperonsAn operon is a cluster of structural genes transcribed together under the control of a single promoter. The promoter region...
72
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

120
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
120
Amino Acid Catabolism01:18

Amino Acid Catabolism

104
Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
104
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

54
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
54

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Analysis of acute stroke-like lesions in MELAS: Distribution, potential boundaries and spreading pattern.

Neuroimage. Reports·2026
Same author

Quantum-machine-assisted drug discovery.

npj drug discovery·2026
Same author

Associations of cumulative exposure and two-time-point clustering of the triglyceride-cholesterol-body weight index with incident cardiovascular disease in middle-aged and older Chinese adults: a nationwide cohort study.

BMC public health·2026
Same author

The relationship between workplace violence and turnover intention among psychiatric nurses: the mediating roles of ward atmosphere and social distance.

Frontiers in public health·2026
Same author

Association between Advanced Lung Cancer Inflammation Index and mortality in US adults with obstructive sleep apnea.

Medicine·2026
Same author

An Inorganic Layered Coordination Polymer as High-Performance Solid-State Electrolyte for Stable Lithium Metal Batteries.

Advanced materials (Deerfield Beach, Fla.)·2026

Related Experiment Video

Updated: Aug 15, 2025

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
08:13

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

17.2K

Functional stability correlates with dynamic microbial networks in anammox process.

Tao Ya1, Yan Huang1, Kening Wang1

  • 1Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Bioresource Technology
|January 1, 2023
PubMed
Summary
This summary is machine-generated.

Microbial communities in anammox systems shift over time, with Planctomycetota decreasing and others increasing. This dynamic microbial network succession maintains stable bioreactor function, highlighting key heterotrophic species.

Keywords:
AnammoxFunctional stabilityHeterotrophic bacteriaMicrobial network

More Related Videos

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
11:31

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation

Published on: July 13, 2012

33.9K
Bioreactor Assembly for Continuous Culture of Complex Fecal Communities
09:37

Bioreactor Assembly for Continuous Culture of Complex Fecal Communities

Published on: April 25, 2025

460

Related Experiment Videos

Last Updated: Aug 15, 2025

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
08:13

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

17.2K
Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
11:31

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation

Published on: July 13, 2012

33.9K
Bioreactor Assembly for Continuous Culture of Complex Fecal Communities
09:37

Bioreactor Assembly for Continuous Culture of Complex Fecal Communities

Published on: April 25, 2025

460

Area of Science:

  • Environmental microbiology
  • Bioreactor engineering
  • Microbial ecology

Background:

  • Stable operation of anammox (anaerobic ammonium oxidation) systems relies on understanding microbial community dynamics.
  • Microbial network structure and function are intricately linked to overall system stability.

Purpose of the Study:

  • To investigate the microbial community succession and network dynamics in an anammox reactor over 250 days.
  • To identify the relationship between microbial community changes and the functional stability of the anammox system.

Main Methods:

  • Long-term operation of an anammox reactor under constant conditions.
  • Analysis of microbial community composition and relative abundance.
  • Microbial network analysis to reveal interaction patterns and identify keystone species.

Main Results:

  • A gradual decrease in Planctomycetota abundance, with concurrent increases in Chloroflexi and Proteobacteria.
  • Predominance of stochastic processes in bacterial assembly during reactor operation.
  • Successional dynamics in microbial interaction networks despite stable system performance.
  • Alternating roles of Chloroflexi and Proteobacteria in the microbial network.
  • A negative relationship between anammox bacteria and heterotrophs contributing to functional stability.
  • Identification of heterotrophic keystone species crucial for network structure and function.

Conclusions:

  • Microbial community composition and network structure undergo significant succession in stably operated anammox systems.
  • The interplay between different microbial groups, particularly heterotrophs, is vital for maintaining long-term functional stability.
  • Findings provide valuable insights for managing and optimizing other bioreactor systems.