Chapter One Vocabulary

1. Describes the interactions between the biotic and abiotic factors in an area
4. Two different speceis interact where both organisms benefit
5. The first organisms to move into a specific habitat
8. Two different species interact, where one organisms is harmed and the other is helped
10. An abiotic factor that provides energy for photosynthesis
12. The total number of populations interacting ina specific area
13. One specific type of individual species
14. A population count where every individual of one species is counted
16. An environmental factor that causes a population to decrease
19. The number of organisms that a specific area can support
20. The organisms that a parasite lives on or in
23. The places where organisms find what they need to survive
24. A group of individuals with similar characteristics, they can reproduce and their offspring can also reproduce
25. The living parts of an ecosystem
26. A group of the same species living within a specific area

2. The interaction between two species that benefits at least one without harming the other
3. A stage of ecological development within an area
5. The number of a species within a specific area
6. A population count where only a small part of the organisms are counted and then total is estimated
7. The study of the interactions between biotic and abiotic factors
9. One organisms
10. The series of changes that occur in an area where the ecosystem has been distrubed, but where soil and organisms still exist
11. Describes organisms taht are moving out of an area
15. The never been alive parts of an ecosystem
17. A population that is entering a specific area
18. A behavior or physical charateristic that allows an organism to live successfully in its environment
21. The struggle between organisms to survive as they attempt to use the same limited resources
22. An organism that benefits by living on or in a host and harms the host