chapter 22 humans & the environment

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???