Endangered Species

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by LittenP2G1
Last updated 5 years ago

Human Influence on Ecology

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Endangered Species

Tie in: An endangered species is at risk of extinction because of human activity, changes in climate, changes in predator-prey ratios, etc.

Buy in: Humans are largely responsible when animals become extinct, endangered, or threatened. They do this by hunting, fishing, deforestation, pollution, and bringing in exotic species.

Endangered Species

The endangered species act provides for the conservation of species that are endangered or threatened throughout their range and the conservation of the ecosystemson which they depend. Aproximately 2,215 species are listed as endangered or threatened.

A species is considered endangered if it is in danger of extinction throughout all or a significant portion of its range or if it's likely to become an endangered species within the foreseeable future.

Scientists in the arctic are doing deep core, which is when they drill a hole down into the ice and pull out a core of ice. In this core scientists can get specific information about the weather, atmosphere, and temperature for a specific time period. They can test back to 420,000 years. The tests have revealed facts about the CO2 in the atmosphere. The levels have gone up over 300 parts per million. This means that some of the CO2 that used to leave the Earth's atmosphere is now remaining inside of it. Those trapped gases are known as greenhouse gases. They are causing the earth's temperature to rise. The increase in temperature causes the snow and ice to melt.

For arctic animals, such as polar bears, global warming is their biggest threat. They live in a very specific habitat. They need cold temperatures, snow, and ice. They have very few natural threats in their region and are at the top of the food chain. Polar bears are threatened as a direct effect on how we as humans treat the earth and the environment.


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