Marine Science Vocabulary: Chapter 12

2. The maximum population size that can be sustained by the available resources in a given environment.
4. The type of symbiosis in which one partner, the parasite, derives benefit from the other, the host.
7. Natural selection that acts against individuals with extreme expression of a trait.
10. When changes in the abundance of an organism result in changes at other trophic levels of the food chain.
12. Population growth that is constrained by biotic or abiotic factors such as competition or nutrients.
13. A living component of an environment.
15. The interaction that results when a resource is in short supply and one organism uses the resource at the expense of another.
16. The elimination of one species by another as a result of competition.
17. The type of symbiosis in which both partners benefit from the relationship.
18. The process in which one species evolves in response to another.
19. The full range of ecological characteristics of a species, like its feeding habits, specific habitat, and reproductive strategy.
20. The genetic adaptation of a population to its environment through evolution.
21. The entry of young individuals into a population or, in fisheries biology, into a fished stock.

1. Unrestricted population growth where the population grows at a faster rate with each successive generation.
3. Natural selection that favors extreme expression of a trait.
5. A non-living (physical or chemical) component of the environment.
6. The study of the interactions between organisms and their environment.
8. Defense mechanisms that an organism uses only in response to predators.
9. The type of symbiosis in which one species obtains shelter, food, or other benefits without affecting the other, or host.
11. An essential factor whose short supply limits the growth of a population.
14. The sharing of resources by specialization.