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Transcript of Great Lakes
designed by Péter Puklus for Prezi
Clue #5A Pollution
Climate Change for the Great Lakes
Clue #3A: Habitat Loss
Great Lakes Research Activity
The Great Lakes region has become densely populated. Many large U.S. and Canadian cities are located along their shores As the population of the area has grown, forests and wetlands have disappeared. More habitats will be lost unless they are protected from future development.
Clue #4: Population Density
Fertilizers and pesticides are used by farmers and homeowners. These chemicals runoff into area rivers, streams and lakes. Wetlands and heavily forested areas help reduce erosion and runoff by filtering out pollutants. They help to maintain a high water quality.
A century ago, loggers in the Great Lakes area told folktales of a giant lumberjack
named Paul Bunyan who could cut down a forest in minutes. It is also said that he created the Great Lakes by scooping out ponds to provide drinking water for his big blue ox, Babe. Today, many of those dense forests are gone and this habitat loss is creating problems for the Great Lakes.
Restoring Forest Habitat:
In the past, settlers and loggers cut down trees in the Great Lakes region in order to make a living. Forests were also cleared in order to build factories and cities. It is estimated that about half of the region’s forests have been lost to development. When habitats are lost, the plants and animals that live there are lost as well.
Today, people are working to reverse forest loss in the Great Lakes watershed. Timber companies are replanting trees after an area has been logged. The result is that Great Lakes forests are now expanding instead of shrinking.
Like forests, wetlands (marshes, bogs, swamps) were lost during the settlement of the Great Lakes region. Wetlands provide habitats for a wide variety of wildlife. They also help to control flooding during storms. In the past, people thought wetlands were useless and they filled them in order to make use of the land. Eventually, more than half of the area’s wetlands were destroyed.
Today, groups are working to protects wetlands. They are creating wetland nature preserves and teaching landowners about their value. In some places, developers must create new wetlands to replace any that they destroy.
Clue #3B: Agriculture (Farming)
Go through the ten clues. Take detailed notes about each problem, it's impact and possible solutions.
I understand the environmental challenges facing the Great Lakes.
The Great Lakes
Graphs: Invasive Species, Pollution
Environmentalists helped to ban DDT in 1972. The U.S. further protected the bald eagle by placing it on the Endangered Species list.
Today, the Great Lakes bald eagle population is on the rebound. In 2007, there were more than 11,000 breeding pairs and the bald eagle was removed from the U.S. Endangered Species list. The U.S. and Canada continue to work together to identify and improve bald eagle habitat.
The Great Lakes bald eagle population is on the rebound. In 2007, the bald eagle was removed from the U.S. endangered species list. The U.S. and Canada are working together to identify and improve bald eagle habitat.
Clue #5B Pollution & Eagles
Testimonial from a Fisherperson on Lake Superior
My name is Xion and I own a fish market that sells smoked trout. I had great hopes of passing my market down to my grandchildren. Due to this new invasive species, I don’t know if my grandchildren will be able to do as well with the store as I have done.
Sea lampreys are fish native to the Atlantic Ocean, but they were introduced to the Great Lakes in the 1800s. There are no fish in the Great Lakes that feeds on them. Sea lamprey have round mouths with a sucking disc filled with sharp, horn-shaped teeth that surround a rasping tongue. They attach to a fish with their suction mouth and feed on its blood and body fluids. One sea lamprey will destroy up to 40 lbs. of fish during its life. Only one out of seven fish that are attacked will survive. Sea lampreys prey on all types of large fish such as lake trout, salmon, rainbow trout (steelhead), brown trout, whitefish, yellow perch, burbot, walleye, and catfish.
Before sea lampreys entered the Great Lakes, my company along with others harvested about 15 million lbs. of lake trout in Lakes Huron and Superior a year. By the early 1960's the catch was only about 300,000 lbs. Our business was devastated.
Sea Lamprey on a trout
Damage from a Sea Lamprey
Clue #8A Invasive Species
I am writing to you because I am very concerned about pollution in the Great Lakes. One great challenge in the Great Lakes today is
. This is pollution that does not come from a single location. When rainfall, snowmelt, and irrigation water run across the land, the water picks up
from the soil.
from storms also picks up waste from industrial and construction sites.
Old toxic waste dumps also pollute. Many contain poisons that leak into waterways. There are as many as 250 dumps on the shores of the Niagara River alone.
Pollution from the air damages watersheds as well. Mercury, among other things, is released into the air when coal is burned. This highly toxic metal falls back to Earth mixed with rain or as dust. It then enters waterways and the food web.
I am happy to see that Canada and the United States are working to clean up non-point-source pollution. They have made new laws to limit harmful chemicals that go into the air, water, and soil. They are also cleaning up toxic sediment in waterways. Toxic
is polluted soil that has settled to the bottom of lakes and rivers. Removing such sediment is both difficult and costly.
The best way to deal with pollution is to prevent it. Today, education programs encourage prevention. What new laws are you proposing that can help future generations in and around the Great Lakes?
Teacher, Mother, Concerned US Citizen
DDT is a pesticide that was commonly used for many years to control insects. In the 1970s, it was discovered that DDT was making it difficult for raptors like the bald eagle to reproduce. The U.S. bald eagle population hit a low point in 1963, when a nesting survey in the lower 48 states found only 417 pairs.
Write a detailed report that summarizes your research. Your report should be written on Google Docs or a sheet of paper and include
; an introduction, one paragraph for each problem (
habitat loss, pollution, invasive species)
and a concluding paragraph
Your description for each problem should contain the following information:
1. Describe the problem; habitat loss, pollution or
invasive species. (Facts, Evidence, Observations)
2. What impact does this have on people, animals or
3. What are some solutions to this problem?
Great Lakes Report
Chemical Treatment for Zebra Mussels