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Terms in this set (38)
are the living parts of a habitat
The place where an organism lives and that provides the things the organism needs
An organism's habitat must provide food, water, and shelter.
The nonliving parts of an ecosystem
algae and plants use the abiotic factors sunlight, carbon dioxide, and water
A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce.
All the different populations that live together in an area.
Made up of the community of organisms that live in a particular area, along with their non-living surroundings.
All the members of one species in a particular area.
The smallest unit of ecological organization.
The study of how things interact with each other and with their environment.
Counting the number of organisms in a small area and multiplying to estimate the number in a larger area.
An approximation of a number, based on reasonable assumptions.
The amount of births in a population in a given amount of time
The number of deaths in a population in a given amount of time.
Moving into a population.
Leaving a Population
Number of individuals in an area of a specific size.
An environmental factor that causes a population to decrease
The largest population that an environment can support.
The process where a characteristic that makes an individual better suited to its environment may eventually become common in that species.
An organism's particular role in its habitat, or how it makes its living
The behaviors and physical characteristics of species that allow them to live successfully in their environment.
The struggle between organisms to survive in a habitat with limited resources.
The organism that is killed by the predator.
An interaction in which one organism kills another for food
An adaption that allows predators to attack and kill their prey.
A close relationship between two species that benefits at least one of the species
A relationship between two species. They are mutualism, commensalism, and parasitism.
A relationship in which both species benefit. For example bacteria in the
A relationship in which one species benefits and the other is neither helped nor harmed. For example a nest in a cactus tree.
Involves one organism living on or inside another organism and harming it.
The organism that benefits in a parasitic relationship.
The organism that a parasite lives on. For example the dog a flea lives on.
The first species to populate an area where primary succession takes place
The series of predictable changes that occur in a community over time
The series of changes that occur in an area where no soil or organisms exist.
The series of changes that occurs after a disturbance in an existing ecosystem.
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