Envirothon 1
What is Biodiversity?
The variety of life on Earth.
What are the three sections to biodiversiy?
Species diversity, ecosystem diversity, and genetic diversity.
What is species diversity?
All living things on Earth and their species.
What is ecosystem diversity?
All of the habitats on Earth.
How many species are there?
About 10 million – 300 million
What is genetic diversity?
The genetic variation present in a population or species.
What does genetic diversity help?
Safeguard against future problems (diseases or natural disasters).
True or false, loss of biodiversity is one of our most urgent environmental problems?
True.
When human population increases, biodiversity ___________.
Decreases
How do invasive species affect biodiversity?
They reproduce quickly and spread in large area, using lots of natural resources.
What are some ways that invasive species get introduced to Pennsylvania?
Dumping aquarium plants, waterways, various imported products.
What is sustainability?
The state of equilibrium with our environment.
What was the “Endangered Species Act of 1973” and who was the law signed by?
It was a law designed to protect critically imperiled species from extinction. It was signed by President Nixon
How many threated and endangered animals and plants are there in the United States.
481 – animals
795 – plants
What does endangered mean?
A species that is in imminent danger of extinction or extirpation throughout the range of Pennsylvania.
What does threatened mean?
A species that may become endangered within the foreseeable future throughout the range of Pennsylvania.
What does extirpated mean?
A species that has disappeared from Pennsylvania, bit still exist elsewhere.
What does extinct mean?
A species that occurred in Pennsylvania, but no longer exists.
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