Unit 4: Ecology

Essential Questions• What is ecology?• What factors affect population sizes and growth rates?• How do humans exploit the environment and how does this

effect various ecosystems?• How can humans positively effect the environment?• What are some current conservation efforts, and where are

conservation efforts heading?

Day 1: Ecology and Ecosystems• Required Readings: • 2.1: Ecology and Ecosystems

• Learning Objectives:• To understand that living organisms require certain conditions for

their survival• To understand that living organisms interact with one another,

and with their non-living environment• To define population, community and ecosystem• To realize that available resources change throughout the year

Starter• List the different ecosystems that you know• What is the climate like in these ecosystems?• What animals and plants are present in the ecosystems?• Time: 10 minutes

Activity 1• Choose one of the biomes below and complete the graphic

organizer for your biome• Tundra• Tropical rain forest• Taiga• Desert• Temperate deciduous forest• Grasslands• Savanna • Marine• Fresh water

• Time: 20 minutes

Activity 2• Create a poster for your biome• Include the following items:• Weather & climate• Plants, animals and their relationships• Ecological concerns or issues

• Time: 25 minutes

Activity 3• Ecosystems at school• Go around the school and complete the “ecosystems at

school” activity• Find 2 different “ecosystems” in different locations• Time: 25 minutes

Closing and Homework• What do the following words mean?• Biotic• Abiotic• Community• Ecosystem• Population

• Complete your biome poster• Complete the ecosystems at school activity• Complete Biomes of the world flow chart

Day 2: Factors affecting population size & Human population growth (45 minutes)

• Required Readings:• 4.8 & 4.9

• Learning Objectives:• To understand what is meant by environmental resistance• To list examples of biotic and abiotic factors which limit

population growth• To explain the form of a typical growth curve• To know that the evolution of humans from hunter-gatherers to

permanent settlers caused changes in the environment• To understand the form of a human population growth curve

Starter • What is a carrying capacity?• What are biotic and abiotic factors that would contribute to a

population’s carrying capacity?• Are humans at their carrying capacity? Explain• Time: 10 minutes

Activity 1• We will complete the activity “How many bears can live in the

forest?”• Time: 30 minutes

Homework• Human population growth is exploding at an exponential rate. • The graph on the next page shows the population growth, as

well as some predictions• What are the 3 revolutions that have occurred to aid in this

exponential growth?• The red, orange, and green lines on the graph are predictions

for what could happen to human population growth. What are the different situations that could lead to each of these predictions?

• Choose your home country and create a population pyramid for it (if data is not available, choose any other country)• Does it have an LEDN or MEDN structure? Explain• What are the different factors that have contributed to the

particular structure it has?

Day 3: Agriculture• Required Readings: • 4.10, 4.11

• Learning Objectives:• To understand why agriculture is a threat to conservation• To understand how careful management can help to conserve

biodiversity• To understand that chemical discharges may pollute land as well

as air and water• To understand that many human effects on the land involve loss

of wildlife habitat• To know that there are ways to reverse loss of wildlife habitiat

Starter• Make a table in your notebook that depicts the pros and cons

of agriculture• Take into consideration: land use, pollution, habitats for plants

and animals, biodiversity, soil stability, etc. • Be thorough in your explanations• Time: 15 minutes

Activity 1• You will be given 1 of 3 groups• Farmers• Conservationist • Consumer

• Your job is to research agriculture from your group’s point of view in order to have a debate with the other 2 groups

• You will need to have an opening and closing statement, as well as points to argue during the debate

• Time: 45 minutes

Activity 2• Debate• Each side will present their opening argument• Each side will then have time to prepare rebuttal statements• Each side will then present their closing argument• You will be asked to vote which side presented the strongest

case• Time: 20 minutes

Closing and Homework• Work with a partner to write a paper that depicts the pros and

cons of agriculture• How can we move forward to prevent habitat loss, preserve

biodiversity, and decrease the damage to soil?• Due: December 5• All outstanding assignments/corrections due December 7

Day 4: Pollution • Required Readings:• 4.12

• Learning Objectives:• To recall why water is important to living organisms• To understand that water supplies oxygen to living organisms• TO know how excess nutrients in water lead to depletion of

oxygen levels• To recall other aspects of water pollution

Starter• Why is oxygen depletion in water a negative thing?• What are the causes for oxygen depletion, or polluting of

water sources?• What are some ways that you can help with the prevention of

water pollution?

Activity 1• Imagine those rivers were your only source of water and you

depended on them for cooking, bathing, washing up, etc.• Your lab group has been asked to clean up these rivers so that

the communities can continue using it without the risk of getting very ill

• You will be given a bucket of water that contains “pollution” in it, as well as some supplies you can use to clean it

• Your lab group must devise a plan to clean the water, and then clean it

• The group that has the cleanest water, and the largest quantity of clean water will receive a contract to clean the village’s water supply

• Time: 60 minutes

Activity 2• We will discuss the action plans of each of the lab groups• What are some ways that we can improve on our water clean

up?• What implications does this have for real life?• What are some ways that we can prevent this?• Time: 15 minutes

Closing and Homework• All outstanding work due by Friday, December 7

Day 5: Human Impact on the Environment• Required Readings:• 4.13

• Learning Objectives:

Day 6: Positive Human Influences (60 min)• Required Readings:• 4.14

• Learning Objectives:

Day 7: Conservation Efforts• Required Readings:• 4.15

• Learning Objectives: