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Biology Vocab

Chapter 14 Vocabulary

TermDefinition
Habitat Combined biotic and abiotic factors found in the area where an organism lives.
Ecological Niche All of the physical, chemical, and biological factors that a species needs to survive, stay healthy, and reproduce in an ecosystem.
Competitive Exclusion Theory that states that no two species can occupy the same niche at the same time.
Ecological Equivalents Organisms that share a similar niche but live in different geographical regions.
Competition Ecological relationship in which two organisms attempt to obtain the same resource.
Predation Process by which one organism hunts and kills another organism for food.
Symbiosis Ecological relationship between members of at least two different species that live in direct contact with one another.
Mutualism Ecological relationship between two species in which each species gets a benefit from the interaction.
Commensalism Ecological relationship in which one species receives a benefit but the other species is not affected one way or another.
Parasitism Ecological relationship in which one organism benefits by harming another organism.
Population Density Measure of individuals living in a defined area.
Population Dispersion Way in which individuals of a population are spread out over an area or volume.
Survivorship Curve Graph showing the surviving members of each age group of a population over time.
Immigration Movement of individuals into a population.
Emigration Movement of individuals out of a population.
Exponential Growth Dramatic increase in population over a short period of time.
Logistic Growth Population growth that is characterized by a period of slow growth, followed by a period of exponential growth, followed by another period of almost no growth.
Carrying Capacity Number of individuals that the resources of an environment can normally and persistently support.
Population Crash Dramatic decline in the size of a population over a short period of time.
Limiting Factor Environment factor that limits the growth and size of population.
Density-Dependent Limiting Factor Environmental resistance that affects a population that has become overly crowded.
Density-Independent Limiting Factor Environmental resistance that affects a population regardless of population density.
Created by: 58knasims