Across
- 2. increase in population due to births
- 6. decrease in population due to deaths
- 9. in order to estimate a population size, population _______ is done
- 12. the ____ rate of r-selection species is usually quite high
- 14. the population of K-selection species is usually ____ over time
- 17. in an ideal, unlimited environment, this kind of population increase can occur
- 21. the body size of K-selection species is typically ____
- 23. increase in population due to organisms moving into the environment
- 25. decrease in population due to organisms moving out of an environment
- 27. the maximum population of a species that an environment can sustainably support (2 words)
- 28. in bottom-up population control, resources are limited to ____ trophic levels which limits the energy available to other trophic levels
- 30. this country has the highest population in 2023
Down
- 1. using the capture-mark-release-recapture method, population can be estimated using this calculation (2 words)
- 3. the amount of a resource that can be taken from an ecosystem without affecting the long-term population is known as the sustainable ____
- 4. as wastes accumulate in a closed population of yeast, the mortality rate increases in the ____ phase of the population curve
- 5. in the ____ phase of population growth, the rate slows as resources start to become limited
- 7. K-selection species typically invest a lot of time, energy, and resources into their ____
- 8. an organism that eats fish
- 9. the body size of r-selection species is typically ____
- 10. the capacity for an ecosystem to remain productive and diverse indefinitely
- 11. in the ____ phase of population growth, the population remains steady at or near the carrying capacity
- 13. in ____ population control, higher trophic levels are used to control population dynamics (2 words)
- 15. in the plateau phase of population growth, (natality + immigration) and (mortality + emigration) are ____
- 16. if (emigration + mortality) is greater than (immigration + natality) the population will ____
- 18. sometimes fish cannot be kept within a certain size range so that they can be allowed to ____
- 19. this type of population growth occurs when environmental pressures limit the rate of growth
- 20. one reason yeast is useful for population studies is that it reproduces very ____
- 22. density ________ factors that limit population growth are related to the size of the population
- 24. population growth factors such as weather and climate and natural disasters are known as density _______ factors
- 26. if natality is greater than mortality, the population will ____
- 29. early in a population history, the growth rate is very slow in a period known as the ____ (2 words)