Ecology Crossword Puzzle

3. an animal that generates heat through a metabolic process
8. a close relationship between two organisms
9. a symbiotic relationship in which one organism benefits and the other is unaffected
11. a community in which several related food chains exist
12. the first species to inhabit an environment during a succession
14. a representation of the flow of energy in a community
16. an organism that PRODUCES its own food
21. cooperative behavior done by birds
23. species that enter and harm new ecosystems
24. describes plants who complete a cycle in two growing cycles
25. a species that, when removed, causes the entire ecosystem to collapse
26. an organism that produces its own food (umbrella term).
27. a behavior based on experience in the environment
28. maximum population size a habitat can support
29. describes organisms who capture energy from sunlight
30. a series of steps in which energy is transferred

1. an increase in population density of urban areas
2. an animal whose temperature varies with the environment
4. a symbiotic relationship in which both organisms benefit
5. the variety of life in a particular habitat or environment
6. an organism’s specific role in an ecosystem
7. an organism that gets energy from other organisms; a consumer
10. a behavior that does not depend on the environment
13. activation of sympathetic nervous system that allows for an animal to fight off threats or run away
15. a symbiotic relationship in which one organism benefits and the other is harmed
17. describes organism who gains energy from inorganic molecules
18. increases the fitness of the poulation and the individual
19. the business of cutting down and transporting logs to sawmills
20. predator at the top of a food chain
22. extreme devotion to the group that increases the survival of a unit