What do you think a dead zone is? What does it have to do with

oxygen levels in the water?

WARMUP!!!!

So why are DEAD ZONES so Deadly?

GOALS

• Assess the role of nitrate and phosphate in the creation of ecological dead zones

• Predict the location of dead zones based on nitrogen loading data.

CLASS ACTIVITY: Creating a Dead Zone

Tube A-LABEL THIS!!!• Add 50mL’s of salt water• Take Dissolved Oxygen Level

Tube B-LABEL THIS!!• Add 50 mL’s of Salt Water• Take Dissolved Oxygen Level• Add 10 mL’s of Miracle Gro

Dissolved Oxygen Level

(DAY 1)PPT

Dissolved Oxygen Level(DAY 2)

PPT

CHANGE IN DISSOLVED OXYGEN OBSERVATIONS

Beaker A

Beaker B

(in your notebooks)

What separates Beaker A from Beaker B?

YOUR TASK: Map the NitrogenGroups of 2:Part 1: On the Map

-Map the Sewage Treatment Plants and Farmland

Part 2: IN YOUR NOTEBOOKS-Predict where the DEAD zone will appear and why

YOU HAVE 20 MINUTES

USE YOUR NOODLE!!!Plot the location of the major nitrogen polluters into Long Island Sound.

Ridgefield

Shelton

SeymourWallingford

Wilton

Where will the DEAD zones appear? Why?

USE YOUR NOODLE!!The high levels of nitrogen contained within fertilizers

and sewage are a source of nutrition for microscopic organisms called phytoplankton. Predict what might happen to these organisms when large amounts of nitrogen enter the water

http://www.absorblearning.com/media/attachment.action?quick=v3&att=2228

ALGAE BLOOM.

Dead Zone Notes Page 8:STEP 1: EUTROPHICATION

STEP 2: PHYTOPLANKTON BLOOM

STEP 3: HYPOXIA

O2

USE YOUR NOODLE!!!When phytoplankton die, they consume a large amount of oxygen. Explain how this might lead to dead zones.

Dead Zone Notes Page 22:STEP 1: EUTROPHICATION

STEP 2: PHYTOPLANKTON BLOOM

STEP 3: HYPOXIA

O2http://vimeo.com/30460962

USE YOUR NOODLE!!Dead Zones are very common in Western Long Island

Sound, but very rare in the Eastern part. Why?

Ridgefield

Shelton

SeymourWallingford

Wilton

USE YOUR NOODLE!!• Greenwich is considering enacting a ban on

the use of fertilizers in the summer months. Would you support such a ban? Why or Why Not?

The risk of dead zones is rising, and not just in the United States. Which three countries, have the

greatest risk? Why?

Use your NOODLE!!!!!

USE YOUR NOODLE!!!:

• At the start of summer, companies like Home Depot and Lowes often market fertilizers to consumers. Is this a good idea? Why or Why not?

Examine bottles A and B from a few days ago. What do you notice about the beakers? What do you think has happened

to the dissolved oxygen levels in the beakers?

WARMUP!!!!

Dissolved Oxygen Level

(DAY 1)PPT

Dissolved Oxygen Level(DAY 2)

PPT

CHANGE IN DISSOLVED OXYGEN OBSERVATIONS

Beaker A

Beaker B

LET’S TEST THE DISSOLVED OXYGEN!!!!

SO WHAT HAPPENED?

GOALS

• Assess the role of nitrogen in the creation of ecological dead zones

• Predict the location of dead zones based on nitrogen loading data.

USE YOUR NOODLE!!!Qindao, China was set to host the sailing competition for 2008 summer Olympics. However, they had a large problem. Take a look at the video and explain how this problem might have been created.

YOUR TASK: Where’s the Nitrogen? Following the Cleanup at Qindao, China, Chinese Officials are worried about

the formation of dead zones disrupting the sailing events. They want you to locate potential sources of EUTROPHICATION.

GROUPS of 2: use the map-Part 1: in YOUR NOTEBOOK:

-Locate 5 potential sources of nitrogen.

YOU HAVE 15 MINUTES

Public Restrooms

Sewage Treatment Plant

Cow Pasture

Residential Gardens

USE YOUR NOODLE!!!Where were the potential sources of EUTROPHICATION in Qindao?

HYPOXIA NOTES PAGE 9

SOURCES OF EUTROPHICATION

USE YOUR NOODLE!!!How can we clean up or limit the sources of EUTROPHICATION you just identified?

YOUR TASK: Where’s the Nitrogen?

GROUPS of 2: On A whiteboard- Rank the solutions in order of EFFICIENCY.

YOU HAVE 20 MINUTES

Fearing another algae bloom, Qindao officials have generated a list of potential solutions to their eutrophication problem. They need your help in evaluating their efficiency.

SOLUTION RANKING REASON

Use your NOODLE!!!!!What are some practices that can prevent or limit amount of eutrophication that occurs in Qindao?

Public Restrooms

Sewage Treatment Plant

Cow Pasture

Residential Gardens

HYPOXIA NOTES PAGE 9

WAYS TO CLEAN UP EUTROPHICATION

USE YOUR NOODLE!!!Based on the Graph below, during what month would HYPOXIA be the most severe? Why?

Use your NOODLE!!!!!The dead zone that appears in the gulf of Mexico is 3-5 times larger than the dead zone found in Long Island Sound. Why?

USE YOUR NOODLE!!!:-Human activity has a direct role in the creation of

hypoxic dead zones. Identify one action humans can take that would have the greatest impact in lessening the size and effect of dead zones.