Across
- 2. land next to the stream, starting at the top of the bank and containing vegetation on either side.
- 5. the plant community next to the stream, starting at the water’s edge and extending up the bank and beyond on either side of the stream.
- 6. the act of actively seeking after and using an environmental resource (such as food) in limited supply by two or more plants or animals or kinds of plants or animals.
- 9. a large stream.
- 10. an organism that is able to produce its own food from non-living materials, and which serves as a food source for other organisms in a food chain; green plants, algae, and chemosynthetic organisms.
- 12. animals that kill and eat other animals.
- 15. many interconnected food chains within an ecological community.
- 16. newly hatched fish.
- 18. an animal that eats plants; an herbivore.
- 21. a group of plants and animals living and interacting with one another in a particular place.
- 23. a chemical that an organism needs to live and grow that is taken from the environment; it can be an organic or inorganic compound.
- 25. a person who fishes using a rod, reel, hook, and line.
- 26. a body of standing water small enough that sunlight can reach the bottom across the entire diameter.
- 28. an animal that eats plants.
- 30. a group of individuals of the same species occupying a specific area.
- 31. an ecosystem’s resource limit; the maximum number of individuals in a population that the ecosystem can support.
- 32. loose material that results from natural breakdown; material in the early stages of decay.
Down
- 1. any animal without a spinal column; for example, insects, worms, mollusks and crustaceans.
- 3. the natural process in which those organisms best adapted to the conditions under which they live survive and poorly adapted forms are eliminated.
- 4. a group of organisms that occupy the same position in a food chain; each step of an energy pyramid.
- 7. a graphical representation designed to show the relationship between energy and trophic levels of a given ecosystem.
- 8. not derived from living organisms; inorganic.
- 11. the seminal fluid containing sperm of male fish and aquatic mollusks that reproduce by releasing this fluid onto nests containing eggs or into water containing eggs.
- 13. the shoulder-like sides of the stream channel from the water’s edge to the higher ground nearby.
- 14. algae and plant plankton, including single-celled protozoans and bacteria.
- 15. a series of plants and animals linked by their feeding relationships and showing the transfer of food energy from one organism to another.
- 17. animals that eat the organic material of dead plants and animals.
- 19. a mollusk that attach to objects or to each other, often in dense clusters, and has two shells that close on each other, similar to a clam.
- 20. of or having to do with life or living organisms; organic.
- 22. a body of flowing water.
- 24. a species that has been introduced by human action to a location where it did not previously occur naturally, and has become capable of establishing a breeding population in the new location without further intervention by humans and has spread widely throughout the new location and competes with native species.
- 27. animals that eat both plants and animals.
- 29. the function, position or role of a species within an ecosystem.
- 30. an organism that lives on or in the living body of another species, known as the host, from which it obtains nutrients.