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Ecology

Ch 3 Ecology terms

QuestionAnswer
Ecology Scientific study of interactions amoung organisms and between organisms and their environment.
Biosphere Part of earth in which life exists including land, water, and air or atmosphere.
Species Group of similar organisms that can breed and produce fertile offspring.
Population Group of individuals of the same species that live in the same area.
Community Assemblage of different populations that live together in a defined area.
Ecosystem Collection of all the organisms that live in a particular place, together with their nonliving environment.
Biome Group of ecosystems that have the same climate and dominant communities.
Autotroph Plants that capture energy from sunlight or chemicals and use that energy to produce food.
Producer Make their own food.
Photosynthesis Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high energy carbohydrates such as sugars and starches.
Chemosynthesis Process by which some organisms such as certain bacteria, use chemical energy to produce carbohydrates.
Heterotroph Organism that obtains energy from the food it consumes.
Consumer Organism that relies on other organisms for its energy and food supply.
Herbivore Plant eaters
Carnivore Organism that obtains energy by eating animals.
Omnivore Organism that obtains its energy by eating plants and animals.
Detritivore Organism that feeds on plant and animal remains and other dead matter.
Decomposer Organisms that break down and obtain energy from dead organic matter.
Food Chain Series of steps in an ecosystem in which organism transfers energy by eating and being eaten.
Food Web Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
Trophic level Step in a food chain or web
Ecological Pyramid Diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or web.
Biomass Total amount of living tissue within a given trophic level.
Created by: lowery.tina
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