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Across 4. The number of individuals of a species in a given area 5. a population broken into sets of subpopulations held together by dispersal or movements of individuals among them 6. age-specific account of mortality 9. competition in which access to a resource is limited by the presence of a competitor 10. When individuals move out of a subpopulation 12. a defended area 13. round trip movement 14. the number of individuals per unit area 15. Progressive decline in density of plants associated with the increasing size of individuals 17. arrangement of organisms within an area 18. the maximum sustainable population side for the prevailing environment 19. when individuals use a common resource that is in short supply relative to the number seeking it

Down 1. chart of growth of a population developed by calculating the births and and mortality of each age group over time 2. an increase in population size and a decrease in risk of extinction brought about by an increase of immigration into a population 3. Maximum sustainable population size for the prevailing environment 7. the area that an animal normally uses during a year 8. being unaffected by population density 9. When individuals move from another location into a subpopulation 11. the decline in either reproduction or survival under conditions of low postulation density 16. Group of individuals born in the same period of time