Ch. 23 Biodiversity Outline

Ch. 23 Biodiversity Outline - Ch 23 and part of 25...

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Ch. 23 and part of 25 Biodiversity Biodiversity Defined as the variation of life forms in an ecosystem, biome, or the planet Useful for measuring the health of an ecosystem Two scales for measuring diversity: o Local diversity – the number of species in an area of homogeneous habitat: or one community. Ex: plants, fungi, insects o Regional diversity – the total number of species observed in heterogeneous habitat within a geographic area: or among communities Why is diversity important? o Agriculture Wild varieties are used to improve cultivated plants Why improve cultivated plants? Disease outbreaks Increased predation Potential climate change o Medication Cures or treatments for new diseases Curse or treatments for old diseases o Ecological niches and overall function Pollination Nitrogen fixation Nutrient cycling Oxygen production Climate regulation Water purification o Aesthetic beauty o Inspiration for arts o Moral Obligation o Outdoor leisure
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