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17 Cards in this Set

  • Front
  • Back
What is ecology?
Ecology is the study of how the individuals of a species interact with themselves, other species, and their environment.
What is the basic unit of ecology?
What is a population?
A population is a group of individuals of the same species that inhabit the same area.
What is a population density?
Population density is the number of individuals in a population that inhabit a given area.
What factors have ecologists investigated to affect density?
Infectious disease
What is the most common spatial distribution pattern of individuals?
Clumped dispersal is the most common spatial distribution pattern of individuals.
What does clumped dispersal indicate about a species?
Clumped dispersal:

Cooperation improves reproduction and hunting.

Pathogen and parasite transmission among "groups" are reduced.

Each discrete habitat has sufficient abiotic conditions and food.
What is uniform dispersal?
Uniform (regular) dispersal relates to resource limitations (limited food, breeding sites, etc.)

Each individual aggressively maintains its space.

Animals show territorial behavior.

Plants show allelopathy.
What is random dispersal?
Random dispersal is due to the absence of strong attractions or repulsions among individuals.

Similar resource availability (food, water, minerals, soil quality, etc) exists throughout the entire habitat.
Cooperative behavior relates to __________ ________.
clumped dispersal
What is demograhy?
Demography is the study of the vital statistics (birth and death rate) of a population and how they vary over time.
Aggressive behavior relates to _________ __________.
uniform dispersal
Absence of attractions among individuals relates to _________ ___________.
random dispersal
Species-specific behaviors and resource availability relates to _________ _________.
spatial dispersal
What is "life history"?
"Life history" describes the reproductive pattern (strategy) of a species.
What is semelparity?
Semelparity (big-bang reproduction) is a single, massive reproductive event followed by death.
What is iteroparity?
Iteroparity (repeated reproduction) occurs when offspring are produced once or more per year.