2 (22-1) Interconnected Planet Earth’s layersAtmosphere: gasesOzone layerClimateGreenhouse effectHydrosphere: waterGeosphere: rockBiosphere: part of Earth where life exists
3 Biodiversity Variety of life forms in an area Species diversity Richness: # of species in an areaEvenness: # of indiv.’s of each species in an areaGenetic diversity: amt. of variation in the genetic material of all members of a pop.
4 (22-2) Environmental Issues Air PollutionSmog: water vapor mixed w/ human-made chemicalsCFC’s & ozone thinningGlobal warmingAcid precipitation: air pollutants combined w/ waterLand & Water PollutionBiological magnification: chemicals become more concentrated in organisms higher on the food chain
5 Ecosystem Disruption Extinction: death of every member of a species EndangeredEcosystem ImbalancesKeystone species: affects many other species in a communityEx: sea otter
6 Human Resource UsePrimary production: total E stored through photosynthesis by terrestrial organismsEcological footprint: human impact on ecosystemsSustainability: ability to meet human needs so the pop. can survive indefinitely
7 (22-3) Environmental Solutions Conservation Biology: i.d., protect, & manage natural areas w/ large biodiversityBiodiversity hotspotsBioindicator: species sensitive to ecological changeRestoration Biology: plan ways to reverse changes & replace missing ecosystem components
8 Laws & EffortsDebt-for-nature swap: richer countries/org. pay debts if developing country takes preventative stepsEcotourism: supports cons. of ecologically unique areas while bringing economic benefit to localsUrban ecology: study of biodiversity in areas densely populated by humans