Ecology

2. a term that describes a living or once-living organism in an ecosystem
7. a series of predictable and orderly changes within an ecosystem over time
9. a system composed of organisms and nonliving components of an environment
12. the total surrounding of an organism or a group of organisms
13. a term that describe a nonliving factor in an ecosystem
14. a complex arrangement of interrelated food chains illustrating the flow of energy between interdependent organisms
15. a term that describes an organism associated with a land environment
16. the study of the relationships between organism and their interactions with the environment
18. when individuals or groups of organisms compete for similar resources such as territory, mates, water and food in the same environment
19. a term that describes an organism associated with a water environment
20. a group of individuals of the same species living in a specific geographical area and reproducing
22. the position of an organism in relation to the flow of energy and inorganic nutrients through an ecosystem (producer, consumer, decomposer)
23. the lowest taxonomic level of biological classification consisting of organisms capable of reproduction that results in fertile offspring
25. an organism that uses a primary energy source to conduct photosynthesis or chemosynthesis

1. a simplified path illustrating the passing of potential chemical energy (food) from one organism to another organism
3. an organism that obtains energy by feeding on other organisms or their remains
4. different populations of organisms interacting in a shared environment
5. an organism that obtains nutrients by consuming dead and decaying organic matter which allows nutrients to be accessible to other organisms
6. a species that is found in its originating location and is generally restricted to that geographic area
8. a species normally living outside a distribution range that has been introduced through either deliberate of accidental human activity; also can be know as introduced, invasive, alien, nonindigenous, or exotic
10. a relationship between two organisms (mutualism, in which both species benefit; parasitism , in which one organism benefits and the other organism is harmed; and commensalism, in which one organism benefits and the other organism does not benefit or is not harmed
11. a large area or geographical region with distinct plant and animal groups adapted to that environment
17. an area that provides an organism with its basic needs for survival
21. the zone of life on Earth; sum total of all ecosystems on Earth
24. a set of interacting or interdependent components, real or abstract, that form an integrated whole. An open system is able to interact with its environment. A closed system is isolated from its environment.