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Stream Science Crossword

Across
Study of relations btw organisms and their environment
Migration from salt water to fresh water to spawn
Spineless organisms that salmon eat
Inorganic compounds that organisms need for metabolism and growth
Down
Class of tree that loses its leaves each year and dominates the riparian vegetation
The area or "zone" bordering a stream
The natural environment of an organism
The measure of the health of a stream
The rock size salmon need to build their redd
5 native species to Washington streams