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Download Biodiversity Notes Main Idea Details Biodiversity What is biodiversity
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Biodiversity Notes Main Idea Biodiversity What is biodiversity? How many known species are on Earth? What is the estimated actual number of species on Earth? Importance of Biodiversity What does biodiversity provide to ecosystems? How does biodiversity help ecosystems? Loss of Biodiversity What happens if one species is removed from an ecosystem? What is an example of a keystone species? Provide an example of a keystone species. Details Definition: The number of known species on Earth: Estimated actual number of species on Earth: Provides: Helps: We _________________ the environment with ___________ ___________________ in a _________________ network. ___________________ species has a ___________________ or niche to ___________________ in its ecosystem. If ___________________ species ___________________ from an ecosystem, the ___________________ ___________________. Keystone Species are so important to the functioning of an ecosystem that if they disappear, _____________________________________. Ex. ______________________________________________ -Now cover less than _________ of their original territory. -Digging ________________________________________ -Clip ____________________________________________ -Provides ______________________________________ Main Threats to Biodiversity What are four main threats to biodiversity? 1. 2. 3. 4. Habitat Loss What is the number one cause of species extinction? How does habitat loss affect biodiversity in an ecosystem? The ____________________ of habitats is the number _____ cause of species _________________________. Introduced Species What is an introduced species? What is an example of an introduced species? How do introduced species affect biodiversity in an ecosystem? _________________ or exotic species that are not native to a particular _______________________. Population Growth Why do humans affect Earth’s biodiversity? Pollution What are some examples of pollution? How does pollution affect biodiversity in an ecosystem? Affect on ecosystem: Ex. Affect on ecosystem: • There are ________ billion humans living on Earth. • Earth’s population of human beings is ___________________ at a rate of about 222,000 people each day. • Humans take up more ______________ and __________________ more _____________________ than any other species. • Can be an _______________, acid rain, _____________________ or insecticides that can cause reproductive failure in fish, birds, and mammals (like DDT). Affect on ecosystem: Extinction What is species extinction? What is mass extinction? What percentage of species do scientists believe will be extinct by 2100? How will this mass extinction affect Earth? • _______________ occurs when the last individual of a species _____________________. Ex. Mass Extinction: • % of extinct species by 2100: •
