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Chapter 19 Vocabulary

Across
a table showing the life expectancy of a population member based on its age
the statistical study of changes in populations over time
a species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community’s structure
an organism a parasite lives on
the maximum number of individuals of a population that can be supported by the limited resources of a habitat
an adaptation in which an organism looks like another organism that is dangerous, toxic, or distasteful to its predators
the study of life on island chains and how their geography interacts with the diversity of species found there
the first species to appear in primary and secondary succession
the steady population size where birth rates and death rates are equal
the competition among members of the same species
the shape of a logistic growth curve
the number of different species in a community
the succession on land that previously has had no life
the number of births within a population at a specific point in time
an accelerating growth pattern seen in populations where resources are not limiting
Down
a symbiotic relationship between two species where both species benefit
a square within which a count of individuals is made that is combined with other such counts to determine population size and density in slow moving or stationary organisms
the leveling off of exponential growth due to limiting resources
a species which often forms the major structural portion of the habitat
the succession in response to environmental disturbances that move a community away from its equilibrium
a method used to determine population size in mobile organisms
the distribution of the proportion of population members in each age class
an organism that uses resources from another species: the host
the number of deaths within a population at a specific point in time