Micro. 23 - Chapter 23 Microorganisms in the Environment and Effects on Human Health Microbial Ecology Populations \u2022 Formed by individual

Micro. 23 - Chapter 23 Microorganisms in the...

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Chapter 23 Microorganisms in the Environment and Effects on Human Health Microbial Ecology Populations - Formed by individual organisms, growth, and reproduction Guilds - Populations that perform linked metabolic activities Communities - Sets of guilds, usually heterogeneous Microhabitats - Specific small niches: Optimal conditions for survival Habitats - Physical locations where organisms are found - Consist of groups of microhabitats Ecosystems - Consist of organisms, their abiotic environment, and relationship between them Biospheres - Regions of the Earth populated by living organisms Biogeochemical Cycles and Microbes : ( this essential is to make all the organic compo unds food available for all living things ( This is a pathway through which organic compounds for chemical element is changed from one chemical state to another by moving through both the BOTIC (living organism ( ABIOTIC — all the nonliving things components - air , water, soil, sunlight that from parts of the ecosystem . This chemical transformation is called — BIOGEOCHEMISTRY .
Carbon cycle - Sixth most abundant element in the universe - Essential backbone of all organic molecules - Primary biogeochemical cycle Nitrogen cycle - Most abundant gas in the Earth s atmosphere - Nitrogen is necessary for all living organisms Synthesis of proteins, nucleic acids, other nitrogen-containing compounds Biogeochemical Cycles and Microbes (Cont (. Sulfur cycle - Tenth most abundant element in the universe - Similar to nitrogen cycle - Includes both atmospheric and terrestrial processes like weathering of rocks, resul ting in the release of stored sulfur into the air Phosphorus cycle - Essential nutrient for plants, animals, and microorganisms - Cannot be found in atmosphere in the gaseous state - Changes to phosphorus from insoluble to soluble forms Soil Microbiology Moisture - Essential for survival of microorganisms Oxygen - Moist soils are lower in oxygen content than dry soils
- Waterlogged soil: Decline in microbial diversity; anaerobic organisms will dominate pH -

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