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ecology junior

flash cards about ecology

QuestionAnswer
Ecology The study of interactions among organisms and between organisms and their environment, or surroundings.
Biome A group of ecosystems that have the same climate and similar dominant communities.
Chemosynthesis When organisms use chemical energy to produce carbohydrates.
Detritivores Feed on plant and animal remains and other dead matter, collectively called detritus
Trophic level Each step in a food chain or food web.
Biomass The total amount of living tissue.
Denitrification Process that releases nitrogen into the atmosphere once again.
Primary Productivity The rate at which organic matter is created by producers.
Limting Nutrient When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly.
Biotic Factors The biological influences on organisms within an ecosystem.
Niche The full range of phisical and biological conditions in which an organism lives and the way in which the organism uses those conditions
Competitive Exclusion Principle No two species can occupy the same niche in the same habitat at the same time.
Pioneer Species The first species to populate the area.
Microclimate The climate in a small area that differs from the climate around it.
Permafrost A layer of permanently frozen subsoil.
Plankton A general term for the tiny, free-floating oranisms that live in both freshwater and saltwater environments.
Phytoplankton Unicellular algae.
Zooplankton Planktonic animals that feed on the phytoplankton.
Exponential Growth Occurs when the individuals in a population reproduce at a constant rate.
Biosphere Contains the combined portions of the planet in which all of life exists including land, water and air, or atmosphere.
Autotrophs Also called producers.
Logistic Growth Occurs when a population's slows or stops following a period of exponential growth.
Carrying Capacity The largest number of individuals that a given environment can support.
Limiting Factor A factor that causes population growth to decrease.
Density-dependent limiting factor A limiting factor that depends on population size.
Demography The study of human population.
Demographic Transition A dramatic change in birth and death rates.
Age-structure diagrams Population profiles.
Created by: juniorjohnson99
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