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Succession Mini Lab Due Warm Up: Using the method of “breaking down” a word come up with your own working definition of the word Biodiversity NOTE: Unit Test moved to Thursday 10/2 New Homework: Review sheet Objectives: To define Biodiversity To analyze the effects of Biodiversity on communities To identify threats to Biodiversity Biodiversity What is Biodiversity? Biodiversity is a modern term which simply means "the variety of life on earth". Bio= living Diversity= variety Succession--Biodiversity--Stability What is the relationship between these 3 things in an ecosystem? Succession--Biodiversity--Stability What is the relationship between these 3 things in an ecosystem? As the stages of succession go on, Biodiversity increases As Biodiversity increases more available niches are occupied, As niches are occupied ecosystems become more stable Is there such thing as too much Biodiversity? See article Read Silently and Discuss as a class Notes about article: __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ Too much Biodiversity? In some cases increasing Biodiversity can actually harm the ecosystem making it unstable The Snakehead fish in Maryland is an example of an invasive species also called an exotic species. An invasive species is one that is not native to an ecosystem. When it is introduced, it can upset ecosystem stability by out competing native species for resources and taking over their niche. An invasive species can be introduced through human activity (eg. feral cats) or as a result of natural events (corral reefs broken and dispalced by storms) What other things threaten Earth’s Biodiversity? Invasive species (exotic species) Ex: Snakehead fish in Maryland Zebra mussel in Chesapeake Bay Habitat Destruction (destruction of Niches) Ex: cutting down forests Poaching illegal hunting of species Pollution Can you think of any more? Summarizer How can biodiversity help an ecosystem? How can too much Biodiversity hurt an ecosystem?