Community Vocabulary #1

Bottleneck Effect

• A phenomenon that increases genetic diversity in a population.

• A reduction in the genetic diversity of a population caused by a reduction in its size.

• An effect that occurs when a population expands rapidly.

• A genetic mutation that enhances survival in a population.

Competition

• Causes population growth to change, usually as a result of limited resources.

• Increases the availability of resources for all species.

• Eliminates all species that cannot compete effectively.

• Has no impact on population dynamics.

Species abundance

• The total number of species in a community.

• The number of individuals of each species in a community.

• The variety of different species in a community.

• The distribution of species across different habitats.

Keystone species

• A species that exerts a large amount of control on community diversity.

• A species that is the most abundant in a community.

• A species that has no impact on its ecosystem.

• A species that is at the top of the food chain.

Species Richness

• The total number of organisms in an area.

• The number of different species in a given area.

• The variety of ecosystems in a region.

• The abundance of a single species in an area.

Habitat

• The place where an organism lives.

• A type of food an organism consumes.

• The climate conditions of an area.

• The physical characteristics of an organism.

Intraspecific competition

• Competition between members of different species for the same limited resource.

• Competition between members of the same species for the same limited resource.

• Competition between individuals of the same age group for resources.

• Competition between organisms for resources in a shared habitat.

Interspecific Competition

• Competition between members of the same species for the same limited resource.

• Competition between members of different species for the same limited resource.

• Competition between different populations of the same species for resources.

• Competition between organisms for resources in a specific habitat.

Community

• A group of interdependent organisms inhabiting the same region and interacting with each other.

• A collection of unrelated species living in isolation.

• A single species living in a specific habitat.

• A random assortment of organisms without interaction.

Niche

• An organism's particular role in an ecosystem, or how it makes its living (its job).

• The physical environment where an organism lives.

• The genetic makeup of an organism.

• The total number of species in a given area.