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Lesson 42

Relationships Between Organisms

QuestionAnswer
Population dynamics the study of changes in populations and the factors that influence growth and decline in each population within a specified area
Niche how an organism interacts with its surroundings
Habitat where an organism or species lives
Extinction complete and permanent disappearance of a species
Competition involves two organisms competing for the same limited resources
Predation a type of relationship that is beneficial to the predator, but fatal to the organism that is prey
Competitive exclusion condition when a species disappears due to the competition with another species
Competitive release condition that occurs when a competing species disappears, removing one of the limits on population
Mutualism symbiotic relationship that is beneficial to both organisms
Commensalism symbiotic relationship in which one organism benefits and the other is neither harmed or benefited
Parasitism when a predator lives off of a prey organism (host), but does not kill it
Scavengers organisms that feed off of dead or decaying material
Gross primary productivity total amount of energy produced by producers in a community
Food chain path of energy consumption, producers, primary consumers, secondary consumers, tertiary consumers, etc
Primary consumers herbivores, consumers that feed directly on the producers
Secondary consumers consumers that feed on primary consumers and may feed on producers as well
Tertiary consumers consumers that feed on primary and/ or secondary consumers and may feed on producers as well
Grazer food chain food chain starting with photosynthetic autotrophs and ending with carnivores
Decomposer food chain food chain consisting of water and decomposers- bacteria, fungi, and decomposing invertebrates
Food chain an interconnected series of food chains
Created by: ecotteacher
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