Anaerobic Ecosystems
Anaerobic Ecosystems - Related Videos
01:17
What is an Ecosystem?
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2019
Overview An ecosystem is the interaction between all abiotic and biotic factors in an environment and can be classified as terrestrial or aquatic. Terrestrial ecosystems are categorized based on the climate, including annual temperature, rainfall, and seasonality. Aquatic ecosystems are separated further into freshwater and marine, and then by depth, which influences water temperature and the amount of sunlight that penetrates the water. Terrestrial Ecosystems Terrestrial ecosystems are...
11:13
Culturing and Maintaining Clostridium difficile in an Anaerobic Environment
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Cited by 100 •
2013
Clostridium difficile is a pathogenic bacterium that is a strict anaerobe and causes antibiotic associated diarrhea (AAD). Here, methods for isolating, culturing and maintaining C. difficile vegetative cells and spores are described. These techniques necessitate an anaerobic chamber, which requires regular maintenance to ensure proper conditions for optimal C. difficile cultivation.
10:48
Nutrients in Aquatic Ecosystems
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems and both are monitored as a part of water quality testing because in excess amounts they can cause significant water quality problems. Nitrogen in water is measured as the common form nitrate (NO3-) that is dissolved in water and readily absorbed by photosynthesizers such as algae. The common form of phosphorus measured is phosphate...
02:34
Preparing an Anaerobic Sludge Culture under Oxygen-Free Conditions
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2025
Source: Wagner, A. O.,et al., Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions. J. Vis. Exp. (2019)This video demonstrates the preparation and inoculation of anaerobic cultures using oxygen-free sludge under strictly controlled, deoxygenated conditions.
01:27
Anaerobic Digestion of Bioplastics for Biogas Production
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2025
Begin with an anaerobic digester, a sealed, oxygen-free reactor seeded with a synthetic sludge that mimics the settled solids from wastewater.The sludge contains mesophilic anaerobic microbes, a mixed microbial community.These microbes thrive at moderate temperatures and drive the digestion of the sludge’s organic matter.Continuously mix the sludge to sustain the bacterial activity and promote digestion.Later, add bioplastics, which are biodegradable polymers, into the sludge.During incubation,...
FAQs
Anaerobic communities conserve energy by routing metabolism through alternative electron acceptors or fermentation rather than molecular oxygen. These pathways generate different end products, including organic acids, sulfide, carbon dioxide, and methane. The available metabolic route therefore shapes both which organisms can persist and which chemical transformations become prominent in an oxygen-depleted habitat.
Syntrophy links the metabolic activities of different microorganisms, allowing community processes to proceed through coordinated interactions. In these systems, syntrophy can connect organic-matter transformations with methanogenesis, a process associated with methane production. This partnership-based organization helps explain why the behavior of an anaerobic community cannot always be understood by examining one microbial activity in isolation.
Their microbial communities drive transformations within carbon, nitrogen, and sulfur cycles by using alternative metabolic pathways and producing compounds such as organic acids, sulfide, carbon dioxide, and methane. Consequently, the chemical products detected in an oxygen-depleted environment can provide evidence of active microbial cycling and help connect community metabolism with broader ecosystem processes.
Sediments, wetlands, animal intestines, and wastewater systems provide important settings because they support biological communities under oxygen-depleted conditions. Comparing these environments can reveal how microbial interactions and metabolic outputs vary across ecological contexts. Such studies connect local processes, including methane or sulfide production, with the larger biological and environmental functions of the community.
Wastewater systems demonstrate how microbial communities can drive transformations in oxygen-depleted environments. Investigating their metabolic interactions and chemical products helps researchers understand associated carbon, nitrogen, and sulfur cycling. This knowledge supports wastewater treatment by connecting the functioning of anaerobic communities with practical environmental biotechnology applications.
Research on anaerobic ecosystems supports wastewater treatment, renewable bioenergy, agriculture, and environmental biotechnology. It also helps explain greenhouse-gas production, particularly where microbial activity generates methane or carbon dioxide. These applications depend on understanding how community metabolism, chemical products, and interactions operate together in oxygen-depleted environments.