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ecologymickelsen

Flashcards

QuestionAnswer
Ecology The scientific study of interactions among organism and their enviornments, or surroundings.
Biosphere Contains the combined portions of the planet in which all life exists
Species A group of organisms so similar to one another that they can breed fertile offspring
Population Groups of individuals that belong to the same species and live in the same area
Communities Assemblages of different populations that live together in a defined area
Ecosystem A collection of all the organisms that live in a particualr place with their nonliving enviornment
Autotroph Organisms that can create their own food from sunlight or chemicals
Heterotroph Organisms that rely on other organisms for food and energy
Food Web A web linking all the ecosystems together
Trophic Level Each step in the food web
Biomass The total amount of living tissue in a given trophic level
Biogeochemical Cycles The cycle of elements, componds, and other forms of matter from organism to organism and from one part of the biosphere to the next
Limiting Nutrient The limitation of an ecosystem to a single nutrient that cycles very slowly
Weather Day to day condition of Eath's atmosphere at a particular time and place
Climate The average yearly condition of weather in a particular region
Greenhouse Effect The natural trapping of heat by greenhouse gases
Biotic Factor The biological influences of an organism in it's ecosystem
Abiotic Factor Physical or nonliving factors that change or shape ecosystems
Niche The full range of physical or biological conditions in which an organism lives
Logistic Growth When a population's growth stops or declines
Carrying Capacity The largest number of individualsthat a given enviornment can support
Demography The scientific study of the human population
Demographic Transition A dramatic change of birth and death rates
Green Revolution The introduction of Modern Agriculture techniques
Renewable Rescources Replenishable rescources that renew from biochemical cycles
Pollutant Harmful material that can enter the biosphere
Biodiversity The sum of total genetically based variety of all organisms in the biosphere
Biological Magnifacation Concentrations of a harmful substance increase in organisms at a higher trophic level
Created by: cmickelsen1
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