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Human Impact of the Environment and Biodiversity
Transcript of Human Impact of the Environment and Biodiversity
Many Endangered Species
What is it? And why is it important?
Ms. Renner's Biology Class
What are some examples of ways human negatively impact wildlife and the environment?
“The decline of Earth’s biodiversity is an unintended consequence of multiple factors that have been enhanced by human activity. They can be summarized by the acronym
, with the order of the letters corresponding to their rank in destructiveness.”
~E.O. Wilson, "The Creation"
Greatest reason for biodiversity loss.
Habitat loss is due to:
of natural areas to farms, houses, etc
of ecosystems by human activities, housing, transportation, agriculture etc.
of genetic diversity and complex ecosystems by planting/selecting monocultures.
Science and Engineering Practices
1. Asking questions and defining problems
2. Developing and using models
3. Planning and carrying out investigations
4. Analyzing and interpreting data
5. Using mathematics and computational thinking
6. Constructing explanations and designing solutions
7. Engaging in argument from evidence
8. Obtaining, evaluating, and communicating
How can we protect biodiversity and the environment?
Examples of pollution caused by human activity that have negative effects on biodiversity:
Human Agricultural Waste
6.8 billion and counting.
The expansion of human population and affluence, especially in the developing world, harms natural ecosystems.
Overhunting, overfishing, destructive harvesting practices (cyanide, dynamite), illegal trade, exotic pet industry
Low reproductive rate (biotic potential)
Feed at high trophic levels (apex predator)
Large body size
Specialized feeding habits
Specialized nesting and/or breeding areas
Fixed migratory patterns
Found in one place or region
Negative human interactions (attacks on people or livestock)
Invasive species introduced from elsewhere outcompete native species because they:
Have no natural predators
Colonize disturbed habitats quickly
Have a high biotic potential (r-species)
Let's Look at
So Cal Example
, including human-induced climate change
(harmful non-natives, including predators, diseases and predators, that displace native species)
- Human overpopulation, a root cause of other four factors
(hunting, fishing, gathering)
is the variety of life at all structural levels:
Biodiversity provides us with:
Natural Resources: food, water, wood, energy, and medicines
Environmental Services: air and water purification, soil fertility, waste disposal, pest control
Local Mountain Lions are Making International News
Type: Mammal, Feline
Size from Head and Tail: 6 - 8 ft
Weight: 136 lbs
Found throughout the Americans
Has resulted in 100s of names - puma, cougar, catamount, etc
Threats to Their Survival
Habitat Fragmentation - Freeways and Urbanization
What are some ways to help reduce human impact on the local mountain lion population?
Think - Pair - Share
Impacts of Habitat Fragmentation
Mortality due to automobile collisions
Inbreeding (loss of genetic diversity)
Threats to Their Survival
Pollution - Rodenticide