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Ch. 19 Population and Community Ecology Vocabulary

Across
RELATIVE SPECIES ____- the absolute population size of a particular species relative to the population size of other species within the community
____ GROWTH- the leveling off of exponential growth due to limiting resources
The number of individuals in a population is the population ____.
____ SUCCESSION- succession on land that previously has had no life
DENSITY-____ REGULATION- the regulation of population in which the death rate is independent of the population size
ENVIRONMENTAL ____- A change in the environment caused by natural disasters or human activities
_____ RATE- The number of deaths within a population at a specific time
_______ COMPETITION- The competition among members of the same species
A symbiotic relationship between two species where both species benefit
_______ CAPACITY- The maximum number of individuals of a population that can be supported by the limited number of resources of a habitat
SPECIES ____- The number of different species in a community
_____SPECIES DISTRIBUTION- often done by plants when their seeds fall into favorable environments
POPULATION ___- the number of population members divided by the area being measured
Down
_____ SPECIES- a species which often forms the major structural portion of the habitat
____ STRUCTURE- The distribution of the proportion of population members in each age class
____ GROWTH- an accelerating growth pattern seen in populations where resources are not limiting
An organism a parasite lives on
____ SPECIES DISTRIBUTION- often done by territorial animals
a symbiotic relationship in which one member benefits while the other member is not affected
_____ SPECIES DISTRIBUTION- often done by herds or schools of fish
DENSITY-_____ REGULATION- the regulation of population in which birth and death rates are dependent on population size
____ SUCCESSION- succession in response to environmental disturbances that move a community away from its equilibrium
An adaptation to which an organism looks like another organism that is dangerous, toxic, or distasteful to its predators
____ SPECIES- a species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community's structure
____ RATE- The number of births within a population at a specific point in time
An organism that uses resources from another species: the host