chapter 22 humans & the environment
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Chapter 22 Humans & the Environment. 22-1: An Interconnected Planet. Earth’s 3 Major Layers. Geosphere Hydrosphere Atmosphere. Ozone Layer. O 3 Protection Depletion?. http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/60405.htm. Greenhouse Effect. NATURAL! - PowerPoint PPT PresentationTRANSCRIPT
Chapter 22Humans & the Environment
22-1: An Interconnected Planet
Earth’s 3 Major Layers
1. Geosphere
2. Hydrosphere
3. Atmosphere
Ozone Layer
O3
Protection
Depletion?
http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/60405.htm
Greenhouse EffectNATURAL!http://my.hrw.com/sh2/sh07_10/student/flash/visual_concepts/60406.htm Greenhouse gases
Atmosphere traps heat
How’s it work?
What’s the problem?
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.
Think About It!
How are these concepts related?Human ActivityOzone layerGreenhouse effectGlobal warming
Biosphere 2 (AZ)...didn’t work!
Not that simple!
Biodiversity
Species diversity:
Genetic diversity:
Biodiversity-what we know so far...
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
p.439
Chapter 22Humans & the Environment
22-2: Environmental Issues
Pollution #1: Smog
What is it?
What causes it?
Why’s it bad?
Pollution #2: Global Warming
What is it?
What causes it?
Why’s it bad?
Pollution #3: Acid Precipitation
What is it?
What causes it?
Why’s it bad?
Pollution#4: Biological Magnification
What is it?
What causes it?
Why’s it bad?
So, what’s the big deal??
ECOSYSTEM DISRUPTION
All this happening...High rates of end/ext...”mass extinction”
Endangered species
Extinction
Habitat destruction, hunting, harvesting, invasive species
https://www.dnr.sc.gov/pls/heritage/county_species.list?pcounty=charleston~100 rare, threatened, endangered in SOUTH CAROLINA!
Ecosystem Imbalances
Keystone SpeciesOtter Video
World Population Growth Models
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
Human Resource Use
Solution?
Sustainable Use
Chapter 22Humans & the Environment
22-3: Environmental Solutions
What can we do?!
Conservation Biology
Identify, protect, manage natural resources, biodiversity
Restoration BiologyEcosystem damageTry to reverse our impact
Jwaneng mine (Botswana)Lab-grown diamonds vs. strip mining
Canadian ecosystem...
Monitoring Ecosystems
Bioindicators
SEPMN
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
Collaboration!
Migration an issue...2001: pilots
2007:146 captive377 wild
www.whoopingcrane.com
Questions???Questions???
Chapter 22Humans & the Environment
22-3: Environmental Solutions
Biodiversity Hotspots
Green
Rich in unique species, in need of protection
Protection: Environmental Policy
Federal, InternationalProtecting species, habitatsProtected areasClean up pollutionRegulate human activitySustainable use of resourcesEcotourism
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
Everglades...what’s happened?
Development, drainingNon-native speciesNational park ’47Birds disappeared, sea grass, shrimp, ag runoff, biomagnification, drained groundwater20 yr plan
Questions???Questions???