About This Chapter
Microorganisms and the Environment - Chapter Summary and Learning Objectives
Lessons in this chapter can introduce you to the diversity of the singular and multicellular organisms found in our soil, air and water. Instructors explain the roles microorganisms play in regulating our environment and show you how some bacteria contribute to the production of proteins in plants and animals. After completing this chapter, you should be able to identify:
- Types of bacteria found in anaerobic environments and deepwater ecosystems
- The role of bacteria in the nitrogen cycle
- The impact of environmental imbalances in nitrogen-fixing bacteria
- Sources of drinking water contamination
|The Nitrogen Cycle, Acid Rain and Fossil Fuels||Discusses nitrification and denitrification as well as the causes and effects of acid rain and the eutrophication of bodies of water|
|Nitrogen Fixation: Significance to Plants and Humans||Explains how different types of bacteria, such as Rhizobium and cyanobacteria, turn atmospheric nitrogen into a usable form|
|Types of Bacteria Found in Anaerobic Environments||Identifies the types of bacteria found in anaerobic environments, such as methanogens and acetogens|
|Bacteria that Live in Deepwater Vent Ecosystems||Describes the energy sources used by bacteria living in deepwater vent ecosystems|
|Thermus Aquaticus and Other Thermophiles: Definition & Examples||Discusses Thermus Aquaticus and thermophiles in general as well as how this organism was used to isolate Taq (thermostable DNA polymerase), which led to widespread use of PCR|
|Microbial Contamination in Drinking Water: Sources & Control||Outlines different types of microbial drinking water contamination, both bacterial and protozoan, and describes how it is tested|
1. Nitrogen Fixation: Significance to Plants and Humans
Almost 80% of our atmosphere is nitrogen, but we can't use it. We will look at how this unusable nitrogen is converted into a form we can use and why nitrogen is important to plants and humans.
2. The Nitrogen Cycle, Acid Rain and Fossil Fuels
Do you know the difference between nitrite and nitrate? Do you have any clue how all the nitrogen in the atmosphere becomes usable? If you can't answer these questions, then you need to watch this lesson on the nitrogen cycle.
3. Types of Bacteria Found in Anaerobic Environments
This lesson will focus in on the world of anaerobes. We'll discuss the different types of anaerobes that abound on this planet, including obligate, facultative and aerotolerant anaerobes.
4. Bacteria that Live in Deepwater Vent Ecosystems
In this lesson, we will talk about hydrothermal vents, what they are, and what they release. We'll also look into why the substances they release are important for bacteria and higher life forms such as crabs and tubeworms.
5. Thermus Aquaticus and Other Thermophiles: Definition & Examples
This lesson will go into some very interesting creatures known as thermophiles. We will discuss exotic sounding names such as Strain 121 and Thermus aquaticus and how they revolutionized our thought process and technology.
6. Microbial Contamination in Drinking Water: Sources & Control
This lesson will discuss what microbes may contaminate drinking water, what problems they may cause you, how we can test for them, and how we can control them. Find out as we look into coliform bacteria, giardia, and noroviruses.
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Other chapters within the UExcel Microbiology: Study Guide & Test Prep course
- Biology Review
- Microbiology Basics
- Bacterial Biology
- Microbiology Laboratory Techniques
- The Disease Process
- Protozoan Diseases
- Introduction to Viruses
- DNA Viruses
- RNA Viruses
- Fungal Infections
- Foodborne Illnesses and Bacterial Infections of the Gastrointestinal Tract
- Sexually Transmitted Bacterial Diseases
- Blood-borne Bacterial Diseases
- Bacterial Diseases of the Respiratory Tract
- Bacterial Skin and Wound Infections
- Immunology And the Body's Defenses Against Pathogens
- Antimicrobial Drugs
- Food and Industrial Microbiology
- Sterilization and Antiseptic Techniques