24. Disrupting Homes 05/15/2017

Transcription

1 24. Disrupting Homes 05/15/2017 EQ: Ecosystems change over time. How could disrupting an ecosystem affect the biotic and abiotic components in that ecosystem? This will be answered by the end of the lesson!

2 24. Disrupting Homes 05/15/2017 EQOD: What effects are caused by an ecological disruption? Give an example. This will be answered by the end of the lesson!

3 Evidence I: Stop Bothering Me! Initial Thoughts: What do you think is going on in this picture? What is causing the Polar Bear to have no home?

4 Evidence I: Stop Bothering Me! Draw this table in your notes and work with your partner to predict the outcome of these following events: Cause An oil spill occurs the oil spreads to a nearby coral reef How do you think it will affect? The Coral Reef Ecosystem A wildfire burns thousands of acres The Forest Communities As the global temperature rises, the arctic ice melts more and more. The Arctic Organisms

5 Evidence I: Stop Bothering Me! Ecological Disruptions occur when there is a change to the environment which may cause a change to the communities, populations, and organisms living in an ecosystem. For example: Dumping oil into the ocean. Creating a wildfire from leaving a campfire on overnight Carbon Emissions into the environment.

6 Evidence I: Stop Bothering Me! Sometimes our crops, like corn, are Genetically Engineered so they can withstand pests and diseases. However, diseases that affect crops change and adapt, too. What would happen if a disease adapts to killing corn that share the same gene? What problem could that cause to us, humans? animals? What type of foods would we have a hard time producing?

7 25. Disrupting Homes 05/15/2017 EQOD: What effects are caused by an ecological disruption? Give an example. One example of an effect caused by an ecological disruption is.

8 24. Disrupting Homes 05/15/2017 EQOD:How did the changes in the wolf population disrupt the biotic factors of the Yellowstone Park ecosystem? This will be answered by the end of the lesson!

9 Evidence II: Bouncing Back to them Wolves Yellowstone National Park Yellowstone National Park was established in 1872 so that it "shall provide against the wanton destruction of the fish and game (deers, elk, animals hunted for food/fun) found within the Park." However, the government did not protect wolves. They considered wolves to be unwanted predators who were destroying fish and game.

10 Evidence II: Bouncing Back to them Wolves Yellowstone National Park Early park rangers participated in the extermination of wolves in order to stop the wolves' habit of killing "game". From 1917 to 1923, over 130 wolves were killed. By the mid-1970s, wolves had been almost entirely eliminated from the park. What do you think happened to the ecosystem of the Yellowstone National Park after the wolves were exterminated?

11 Evidence II: Bouncing Back to them Wolves 1. According to the food web, which biotic factors are eaten by wolves?

12 Evidence II: Bouncing Back to them Wolves 2. How would killing the wolf population disrupt the biotic factors of the Yellowstone ecosystem? (Think of the organisms connected to those eaten by the wolves)

13 Evidence II: Bouncing Back to them Wolves 3. How would reintroducing the wolves into Yellowstone affect the biotic factors of the ecosystem? (Provide 3 specific examples of affected species).

14 Evidence II: Bouncing Back to them Wolves 3. How would reintroducing the wolves into Yellowstone affect the biotic factors of the ecosystem? (Provide 3 specific examples of affected species).

15 Evidence II: Bouncing Back to them Wolves Changing biotic factors, like adding or killing animals, into an ecosystem can disrupt the ecosystem by creating an imbalance of populations. The increase of the wolf population in Yellowstone Park, disrupted the ecosystem by providing less food for animals like, grizzly bears and coyotes, lowering their populations.

16 Evidence II: Bouncing Back to them Wolves When the wolves were eliminated, this disrupted the ecosystem by allowing fish and game to rise in population. Bears and Coyotes had more food, but this would lead to a decrease in producers, like algae and wheat grass. Other examples European Bunnies eating every plant in Australia Pythons introduced in Florida becoming a pest.

17 Evidence II: Bouncing Back to them Wolves Guess THAT Disruption! This disruption killed tons of tall organisms. They were wiped out because humans needed to build more houses out in the suburbs and they used these tall organisms to make paper and other products. Unfortunately, this also left many organisms without resources, like shelter and food. What disruption happened here?

18 Evidence II: Bouncing Back to them Wolves Guess THAT Disruption! This disruption killed tons of tall organisms. They were wiped out because humans needed to build more houses out in the suburbs and they used these tall organisms to make paper and other products. Unfortunately, this also left many organisms without resources, like shelter and food. DEFORESTATION! (Biotic Component = Trees)

19 Evidence II: Bouncing Back to them Wolves What disruption happened here? Guess THAT Disruption! This disruption eliminated many large friends of the grasslands. These animals have great memory and are important because they eat the tall grass of their ecosystem. As they kept dying, their grassland became a forest, which damaged the balance of their ecosystem and many animals had to disperse, or fell prey to lack of proper resources, like water. They were taken away by the humans because they love hunting their tusks for ivory.

20 Evidence II: Bouncing Back to them Wolves Guess THAT Disruption! This disruption eliminated many large friends of the grasslands. These animals have great memory and are important because they eat the tall grass of their ecosystem. As they kept dying, their grassland became a forest, which damaged the balance of their ecosystem and many animals had to disperse, or fell prey to lack of proper resources, like water. They were taken away by the humans because they love hunting their tusks for ivory. Poaching/Hunting of Elephants!

21 24. Disrupting Homes 05/15/2017 EQOD:How did the changes in the wolf population disrupt the biotic factors of the Yellowstone Park ecosystem? When the wolf population increased, it disrupted the Yellowstone Park by. When the wolf population was eliminated, it disrupted the Yellowstone Park by.

22 Analysis 1. Pick one ecological disruption and list 4 possible effects to the ecosystem (2 biotic and 2 abiotic). 2. What are the benefits of restoring an ecosystem that has been disrupted? (Restoring: Bringing the ecosystem back to its original state) 3. A disruption to an ecosystem is not always necessarily a bad thing. Describe one example when a disruption can be beneficial to an ecosystem.

23 Reflection Complete the graph to show the changes of an elk population so that it relates to the data showing wolf populations over time. Remember to label all the parts of the graph.

24 Summary, Big Idea and Vocab Take 7 minutes to work in a level 0 silence voice on your summary. EQ: Ecosystems change over time. How could disrupting an ecosystem affect the biotic and abiotic components in that ecosystem? Big Idea: New Vocabulary Terms: Ecological Disruption