2 10-1 What is Biodiversity? Short for “biological diversity” Variety of species in an areaNumber of species on Earth is unknownKnow of 1.7 million (Most are insects)Estimate over 10 million species on Earth3 Types of Diversity: species, ecosystem, and genetic.
3 10-1 Benefits of Biodiversity Affects stability of ecosystems and populationsAll species depend on other speciesKeystone species:If it leaves, the ecosystem can’t surviveNot all species are keystoneGenetic diversity increases chances of survival
4 10-1 Benefits of Biodiversity ¼ of drugs are from organismsFood, shelter, clothing, medicineAvoid Famine:Don’t rely on ONE species of crop to feed youHybrids combine genetic materialEcotourism, pets, culture, aesthetics, religion,
5 10-2 Biodiversity at Risk Extinction is NOT new Human activity has accelerated itLikely to become extinct:Small populationLimited habitat/Specialized habitatNeed to migrateDon’t adapt to other habitats
7 10-2 Human Impact Harvesting, Hunting, Poaching: Pollution: Bison (fur), egret (feathers), elephant (ivory), pets, rare wood, herbal medicinePollution:Pesticides, herbicides, fertilizers, cleaning products, trash, medicineWe don’t know all of the effects yet
8 10-2 Critical Areas Certain area have more diversity All are small areas or “Hotspots”Tropical Rainforest – over ½ world’s speciesCoral Reef/Coastal – travel route for speciesIslands – evolve “endemic**” species b/c of separation **native/limited areaHotspots are Most Threatened of these areas
9 10-3 Future of Biodiversity Programs to save species:Captive-BreedingPreserving Genetic Material:Germ plasm banks like in Jurassic ParkZoos, Aquariums, Parks, Gardens
10 10-3 Future of Biodiversity Programs to save ecosystems:Conservation – ecosystems have complex relationships; save the whole thing instead of one speciesLaws:Endangered Species Act (List and no harm)Habitat Conservation PlanBiodiversity Treaty