Chapter 22 Humans & the Environment
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Transcript of Chapter 22 Humans & the Environment
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Chapter 22Humans & the Environment
22-1: An Interconnected Planet
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Earth’s 3 Major Layers
1. Geosphere
2. Hydrosphere
3. Atmosphere
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Ozone Layer
O3
Protection
Depletion?
http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/60405.htm
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Greenhouse EffectNATURAL!http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/60406.htm Greenhouse gases
Atmosphere traps heat
How’s it work?
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What’s the problem?
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Global Warming: 3 possible Global Warming: 3 possible outcomesoutcomes
http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/80008.htm
1.
2.
3.
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Think About It!
How are these concepts related?Human ActivityOzone layerGreenhouse effectGlobal warming
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Biosphere 2 (AZ)...didn’t work!
Not that simple!
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Biodiversity
Species diversity:
Genetic diversity:
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Biodiversity-what we know so far...
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Biodiversity-who cares?
FoodHabitatMedicinesChemicalsPhotosynthesis/production/removing CO2“Biological diversity is the key to the maintenance of the world as we know it” –E.O. Wilson
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p.439
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Chapter 22Humans & the Environment
22-2: Environmental Issues
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Pollution #1: Smog
What is it?
What causes it?
Why’s it bad?
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Pollution #2: Global Warming
What is it?
What causes it?
Why’s it bad?
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Pollution #3: Acid Precipitation
What is it?
What causes it?
Why’s it bad?
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Pollution#4: Biological Magnification
What is it?
What causes it?
Why’s it bad?
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So, what’s the big deal??
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ECOSYSTEM DISRUPTION
All this happening...High rates of end/ext...”mass extinction”
Endangered species
Extinction
Habitat destruction, hunting, harvesting, invasive species
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https://www.dnr.sc.gov/pls/heritage/county_species.list?pcounty=charleston~100 rare, threatened, endangered in SOUTH CAROLINA!
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Ecosystem Imbalances
Keystone SpeciesOtter Video
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World Population Growth Models
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Human Resource UseToo much? Just right? Too little?
We use 10-55% of earth’s NPP
Ecological FootprintUse of natural resourcesProduction of waste, pollutionWe’re exceeding the renewal capacity of earth
• Bill Nye “Stuff Happens” Video• “Trashed” Video
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Human Resource Use
Solution?
Sustainable Use
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Chapter 22Humans & the Environment
22-3: Environmental Solutions
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What can we do?!
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Conservation Biology
Identify, protect, manage natural resources, biodiversity
Restoration BiologyEcosystem damageTry to reverse our impact
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Jwaneng mine (Botswana)Lab-grown diamonds vs. strip mining
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Canadian ecosystem...
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Monitoring Ecosystems
Bioindicators
SEPMN
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Whooping Cranes
Before 1870: 20,000 migrated Canada & Gulf CoastHunting, draining marshes (building)1937: ~15 birds left!Hunting regulations, protected areas1967: USFWS captive breeding program
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Collaboration!
Migration an issue...2001: pilots
2007:146 captive377 wild
www.whoopingcrane.com
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Questions???Questions???
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Chapter 22Humans & the Environment
22-3: Environmental Solutions
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Biodiversity Hotspots
Green
Rich in unique species, in need of protection
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Protection: Environmental Policy
Federal, InternationalProtecting species, habitatsProtected areasClean up pollutionRegulate human activitySustainable use of resourcesEcotourism
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Protection: What you can do
Mindful of purchases, packaging, etcGarbage...recycling...sewage...
Buy local!Plant natives!Enjoy nature, appreciate itEndangered species here? Why?Volunteer w/conservation groups
Rachel Carson—1962, Silent SpringJacques Cousteau-oceanographer, books, videos
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Everglades...what’s happened?
Development, drainingNon-native speciesNational park ’47Birds disappeared, sea grass, shrimp, ag runoff, biomagnification, drained groundwater20 yr plan
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Questions???Questions???