The Case of the Salmon Famine

An Ecological Mystery

Objective (Collapse)

Objective (Expand)

The learner will use evidence of interdependence to predict how changes in a community may affect other organisms in the community.

Next Generation Science Standards (Collapse)

Next Generation Science Standards (Expand)

Disclaimer (Collapse)

Disclaimer (Expand)

This form and all associated materials constitute a work of fiction produced for educational purposes by Heather Cole. Places, photos and names are used fictitiously and any similarity to actual persons, places and events is coincidental. I claim no copyright over the photographs and written materials which are used here for educational purposes in accordance with "fair use." If you wish to use these materials for purposes which go beyond fair use, you will need to ask permission of the copyright owner.

Directions

Solving these riddles correctly will earn you more clues on your map to help solve the case of the salmon famine! The answers to the riddles themselves are clues in their own way! Stay alert and look closely.

Click "City Hall" on the map below to begin.

LEVEL 1:

Great Job! You've unlocked new locations on your map!

Although producers don't eat, they do make food for everyone else!
Keep this in mind as you're sleuthing: Each riddle's solution is a hint for the overall mystery.

Tree with falling leaves by a stream
Photo credit: James Wheeler (Pexels)


LEVEL 2:

Dead rose
Photo credit: Monicore (Monica Stawowy), Pexel

Nice Work! You've unlocked new locations on your map!

Decomposers help return nutrients to the soil so that plants can use them again to build their bodies.
Keep this in mind as you're examining the evidence!

Fungi help decompose!
Photo credit: Egor Kamelev (Pexels)


LEVEL 3:

Deep Ocean Volcanic Vent Community
Photo credit: NOAA Okeanos Explorer Program, Galapagos Rift Expedition 2011

Right On! You've unlocked new locations on your map!

The energy in most ecosystems comes from the sun and must be captured by plants. An organism uses most of that energy, which then ends up as heat in the environment. Around 10% that isn't used (and turned into heat) is stored in the organism's body and passes on up the food chain until there's no stored energy left.
Keep this in mind as you're examining the evidence!

Energy from the sun must be captured by plants
Photo Credit: Pixabay


LEVEL 4:

Now that we know you solve riddles so well,
Find an omnivore that competes with a gazelle!

A savannah food web. Arrows show the direction that energy transfers in the community. 
            In the food web, read from left to right and bottom to top,
            star grass provides energy to beetle and zebra. Oat grass provides
            energy to beetle, rat, zebra and gazelle. Acacia tree provides energy
            to giraffe. Beetle provides energy to rat and mongoose. Rat provides energy
            to mongoose. Zebra provides energy to cheetah and lion. Gazelle provides
            energy to lion. Giraffe provides energy to lion. Mongoose provides energy 
            to cheetah.

Well Done! You've unlocked new locations on your map!

If two species compete over a third (food species), all three populations will be affected by a change in any one of them...
Keep this in mind as you're examining the evidence!

Competition
Photo Credit: Pixabay


LEVEL 5:

Way to Go! You've unlocked TWO new locations on your map!!

Salmon can't run, but they can hide!

Actually, a salmon run--the migration of salmon up a river from the ocean so that they can spawn--is all about giving the next generation the best chance of hiding from predators. Alevin or "sac fry" (newly hatched salmon) hide in the stream gravel for protection, feeding off the remainder of their yolk until they can fend for themselves.

Be sure to watch how energy and matter move as you're examining the evidence!

Life Cycle of Pacific Salmon
Image Credit: Prepared by U.S. Goverment Employee, Author Unknown


LEVEL 6:

On treasure maps I mark the spot,
On tests, I mark what's wrong.
In this food web, I'm doing both:
Which arrows don't belong??

A forest food web with many crossing arrows. Which numbered arrow 
            is incorrect: Arrow 1 goes from flowers to grasshopper.
            Arrow 2 goes from grasshopper to bird. 
            Arrow 3 goes from bird to caterpillar.
            Arrow 4 goes from rat to mosquito.

That's It! You've unlocked new locations on your map!

Those arrows didn't show the correct direction of energy transfer.
Be sure to watch how energy and matter move as you're examining the evidence!



LEVEL 7:


Optional: Mouse over below to draw on the image.

Food web of the Pacific Northwest containing 8 organisms. Type the top
            predators in alphabetical order. 
            An arrow goes from phytoplankton to plankton.
            Another arrow goes from plankton to krill.
            Another goes from krill to salmon.
            Another from salmon to bear.
            Another from salmon to dolphin.
            From salmon to hawk.
            From dolphin to shark.
            From salmon to shark. In alphabetical order,
            the organisms are: bear, dolphin, hawk, krill, phytoplankton, plankton, 
            salmon, shark

Click the button below to erase marker and start over.

Wonderful! You've unlocked new locations on your map!

Keep the food web in mind as you're examining the evidence.
(Also, someone with W in their name is partially responsible for the Salmon Famine...!)



LEVEL 8:

Optional: Click below to mark on the food web.

A food web containing 11 organisms and 17 energy relationships,
            described from bottom to top and left to right. 
            An arrow goes from climbing vine to vole.
            Another arrow goes from climbing vine to locust.
            Another goes from mulberry to locust.
            Another from mulberry to hare.
            Another from mulberry to squirrel.
            From locust to vole.
            From locust to frog.
            From locust to robin.
            From squirrel to eagle. 
            From vole to fox.
            From frog to heron.
            From frog to snake.
            From hare to fox.
            From hare to snake.
            From robin to eagle.
            From snake to heron.
            From snake to eagle.

Click the button below to erase marks and start over.

Amazing! You've unlocked new locations on your map!

Climate--which involves temperature and precipitation--is just one non-living (environmental) factor that could affect the salmon's survival.
Be sure to keep environmental factors in mind as you're working through the evidence!

Environmental factors affect organisms

Here's how we solved the case!

Video not loading? Navigate here to watch the video on Youtube.

Solving the Mystery...

Click Here to Send Results to Mrs. C!
Whose actions are primarily responsible for causing the Salmon Famine?
(There are two best answers.)













Congratulations!

You solved the case of the Salmon Famine!

"You helped us see that humans rely on fish, which rely on trees, which rely on bears, which rely on fish," Mayor Blackston says. "We'd like to build a monument in your honor! Here's what it will look like!"

The Bear Tree Fish statue to be built in your honor!

Here's how we solved the case!

Video not loading? Navigate here to watch the video on Youtube.

MAP: