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Science in Global Issues (SGI) ECOLOGY: Living on Earth p. 1

SGI Ecology Unit

Transparencies and

Student Sheets


The Purple-spotted Flatfish Fishery

The Current State of the Bayside Purple-spotted Flatfish Fishery

The country of Bayside is on the coast of the Atlantic Ocean. It has a total

coastline of 5,150 km (3,200 miles). This is about the length of the coastline of the

state of Maine or North Carolina on the eastern coast of the United States.

Bayside’s total fishing area covers 800,000 km2 (497, 097 miles2) adjacent to the

coast, as shown in the map below.

Bayside’s waters are home to several species of oceanic fish, including Purple-

spotted Flatfish, Green Flying Fish, and Blue-striped Fishlings. The top predators

in the marine ecosystem are Big Gray Sharks and Pink-spotted Seals. The trophic

relationships among these organisms are shown in the food web below.

Ecology Student Sheet 1.1a

©2008 The Regents of the University of California


In the 1970s, the population along Bayside’s coast grew. Economic prosperity in

the 1970s and 80s led to an increase in jobs and public resources, including

schools and health care. People flocked to the coast to work in the fishery.

In the 1980s, Bayside’s economy continued to thrive as the fishery caught,

processed, and sold Purple-spotted Flatfish. Improvements in fishing technology,

such as faster boats and more accurate radar, allowed fishers to bring in big

catches.

While this growth meant increased economic resources for some families, new

housing developments built along the coastline affected the coastal waters.

Building increased the erosion and runoff of contaminants into coastal waters,

which had a negative effect on the nesting grounds of the Purple-spotted

Flatfish.

The Purple-spotted Flatfish Fishery is Closed

A dramatic drop in Purple-spotted Flatfish population numbers, as shown in the

graph below, prompted Bayside to close the Flatfish fishery in 2000 in an attempt

to save the declining Flatfish population.

In its place, local fishers have begun catching the Green Flying Fish to sell for

profit. There is less demand for this fish, and as a result it is sold at a lower price.

Bayside is facing a big challenge. With the closing of the Flatfish fishery,

residents are concerned that the economy may suffer. Bayside has an

opportunity to make a decision that will affect the sustainability of its coastal

communities. Ecology Student Sheet 1.1b



Name ___________________________________________________ Date _________

Writing Frame: Recommended Action for the Fishery

There is a lot of discussion about the issue of________________________________

________________________________________________________________________

My decision is that _______________________________________________________

My decision is based on the following evidence:

First,___________________________________________________________________

________________________________________________________________________

________________________________________________________________________

Second,_________________________________________________________________

________________________________________________________________________

________________________________________________________________________

People who disagree with my decision may say that _________________________

________________________________________________________________________

________________________________________________________________________

Ecology Student Sheet 1.2



Name ___________________________________________________ Date _________

Class Duckweed Population Data

Duckweed Population Size

Week Group

1

Group

2

Group

3

Group

4

Group

5

Group

6

Group

7

Group

8

Total

Populatio

n

0

1

2

3

4

5

6

7

8

Ecology Student Sheet 2.1 ©2008 The Regents of the University of California


Linear Growth Curve

Ecology Transparency 4.1



Exponential Growth: J-Curve




Carrying Capacity: S-Curve




Population Crash




Name ___________________________________________________ Date _________

The Pink-spotted Seal Population

The data below show the population of the Pink-spotted Seal over time. Note that the Pink-spotted Seal is a predator of the Purple-spotted Flatfish.

Population data for the Pink-spotted Seal

Year Initial

Population

# of

Births

# of

Deaths

Final

Population

1980 345 41 14 388

1985 388 52 15 425

1990 425 30 25 430

1995 430 22 52 400

2000 400 24 104 320

2005 320 17 218 120


Organisms in an Freshwater Ecosystem

phytoplankton

turtle

insect

fish

mushroom

trout

bird

frog

plant

SGI Ecology Transparency 6.1 ©2008 The Regents of the University of California


Food Web for a Freshwater Ecosystem

SGI Ecology Transparency 6.2 ©2008 The Regents of the University of California


Kelp Forest Energy Pyramid

SGI Ecology Student Sheet 6.1



Carbon Cycle Model Key

White Chip 10,000,000 Giga tons of carbon Purple Chip 1,000,000 Giga tons of carbon Blue Chip 100,000 Giga tons of carbon Green chip 10,000 Giga tons of carbon Orange chip 1,000 Giga tons of carbon Red chip 100 Giga tons of carbon Yellow chip 10 Giga tons of carbon Black chip 1 Giga ton of carbon




Moving through the Carbon Cycle

Amount of Carbon in Reservoir

Reservoir Start

(Gt of Carbon)

Round

1

(Gt of Carbon)

Round

2

(Gt of Carbon)

Round

3

(Gt of Carbon)

Atmosphere

750

Water

(oceans, lakes, rivers)

39,000

Rocks and soil

80 million

Organisms

(plants, animals, humans)

2,000

Fossil Fuels

4,000

Total carbon

in the system

80,045,750




Name ___________________________________________________ Date _________

The Carbon Cycle

Ecology Student Sheet 7.1 ©2008 The Regents of the University of California


Name ___________________________________________________ Date _________

Photosynthesis and Cellular Respiration Diagram

Living on Earth Student Sheet 8.1



Kelp Forest Food Web

Living on Earth Transparency 8.1 ©2008 The Regents of the University of California


Name ___________________________________________________ Date _________

Double Entry Journal: Photosynthesis

Main Ideas:

What is happening? (complete once per

paragraph)

My Thoughts:

What does this remind me of or make

me wonder? (complete after reading)




KWL: Photosynthesis

What do I Know? What do I Want to know? What have I Learned?

Living on Earth Transparency 10.1 ©2008 The Regents of the University of California


Transmission Electron Microscope Image

Living on Earth: Ecology Transparency 11.1



Name ___________________________________________________ Date _________

Double Entry Journal: Cellular Respiration

Main Ideas:

What is happening? (complete once per

paragraph)

My Thoughts:

What does this remind me of or make

me wonder? (complete after reading)




Name ___________________________________________________ Date _________

Cod-dominated Ecosystem Graph

Ecology: Living on Earth, Student Sheet 16.1



Name ___________________________________________________ Date _________

Tiger Shark-dominated Ecosystem graph




Name ___________________________________________________ Date _________

Orca-dominated Ecosystem graph




Pacific Halibut Population

Ecology: Living on Earth Transparency 16.1



Pacific Halibut Food Web




Pacific Halibut Dominated Ecosystem graph




Name _______________________________________________ Date _________

Tracking Indicators

Strategy: (circle one) Marine Reserve / Open-net pen Aquaculture

Indicator Predicted Outcome Actual Outcome

Fish Protein

Consumption

Percentage

Change in

Bayside’s

Costal

Population

The Purple-

spotted

Flatfish

Population

Ecology Student Sheet 19.1a ©2008 The Regents of the University of California


Name _______________________________________________ Date _________

Tracking Indicators

Strategy: (circle one) Marine Reserve / Open-net pen Aquaculture

Indicator Predicted Outcome Actual Outcome

Purple-

spotted

Flatfish

Critical

Habitats

Water

Transparency

Fishery

Related

Employment

Ecology Student Sheet 19.1b


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