DO NOW 1.Turn in your Biome Take a Vacation assignment & your Biome Coloring Assignment. 2.How many people do you think live on earth RIGHT NOW? (give me an exact #)

Biodiversity What is biodiversity? Why is it important for each ecosystem to have biodiversity?

Biodiversity Biodiversity is the degree of variation (differences) of life forms within a given species, ecosystem, biome or entire planet.

5 Ways Humans Impact Biodiversity

1. Population Growth

Current Human Population* 7 Billion People

Human Population Growth

Population & Growth Patterns Change in a population size determined by: – Immigration – Emmigration – Birth – Death

Types of Population Growth Exponential Growth – Rapid population increase due to an abundance of resources

Types of Population Growth Logistic Growth – Due to a population facing limited resources

Carrying Capacity The maximum number of individuals in a population that the environment can support

Population Crash Dramatic decline in the size of a population over a short period of time USUALLY happens after a population has exceeded their carrying capacity.

Human Population Through Time How Big is a Billion – Rice Demo

2. Habitat Alteration

Habitat Habitat – place and conditions in which an organism lives.

What are some examples of habitat?

Small habitats within larger habitats

Videos Glacier Disappearing Changing habitats

Habitats can change over time. Mount St. Helens, Washington

Habitat Alteration Changes made to the environment in which an organism lives. Changes can be natural or man-made. WildfiresAcid Rain

Bear Glacier, Alaska 1909

Bear Glacier, Alaska 2005

Muir Glacier, Alaska 1941

Muir Glacier, Alaska 2004

Salt Lake Valley Late 1800s

Salt Lake Valley 2000s

Gila River, Arizona 1935

Gila River, Arizona 1964

Escalante River, Utah 1953

Escalante River, Utah 1998

Coal Mine, Before Restoration

Coal Mine, After Restoration

Wetland, Before Restoration

Wetland, After Restoration

Sustainability Meeting the needs of the present without limiting the ability of people, other species, and future generations to meet their needs.

3. Overharvesting Harvesting of plants or animals in an unsustainable manner. Eventually, the organisms will disappear!

4. Invasive Species Every animal species has a native habitat Exotic species are species that are not living in their native habitat. As long as the species is not harming the other organisms, it is not considered invasive.

4. Invasive Species Non-native species that threaten ecosystems, habitats, or species

How do invasive species come to be in an area? HUMANS!

How do invasive species affect biodiversity Example: Emerald Ash Borer

5. Pollution Pollution: The presence or introduction of a substance or thing that has harmful or poisonous effects.