OUR Ecological Footprint - 15 1. Live near work; Ride bike; minimize car use. 2. Buy energy-efficient furnace. 3. Programmable thermostat: winter/summer 4. Turn off lights when leave room; unplug appliance 5. Eat lower on food chain. 6. Buy food locally; - PowerPoint PPT Presentation

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PPT – OUR Ecological Footprint - 15 1. Live near work; Ride bike; minimize car use. 2. Buy energy-efficient furnace. 3. Programmable thermostat: winter/summer 4. Turn off lights when leave room; unplug appliance 5. Eat lower on food chain. 6. Buy food locally; PowerPoint presentation | free to download - id: 433e44-Mzc3N



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OUR Ecological Footprint - 15 1. Live near work; Ride bike; minimize car use. 2. Buy energy-efficient furnace. 3. Programmable thermostat: winter/summer 4. Turn off lights when leave room; unplug appliance 5. Eat lower on food chain. 6. Buy food locally;

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Buy hybrid car - reduce gas consumption by 1/2 10. Reduce paper/plastic (and ALL) consumption. 11. Reuse (and repair) items; don t use throw- aways 12. Buy ... – PowerPoint PPT presentation

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Title: OUR Ecological Footprint - 15 1. Live near work; Ride bike; minimize car use. 2. Buy energy-efficient furnace. 3. Programmable thermostat: winter/summer 4. Turn off lights when leave room; unplug appliance 5. Eat lower on food chain. 6. Buy food locally;


1
OUR Ecological Footprint - 151. Live near work
Ride bike minimize car use.2. Buy
energy-efficient furnace.3. Programmable
thermostat winter/summer4. Turn off lights when
leave room unplug appliance5. Eat lower on food
chain.6. Buy food locally eliminate
transportation energy.7. Buy hybrid car - reduce
gas consumption by 1/28. Recycle pay tax for
it.9. Reduce paper/plastic (and ALL)
consumption.10. Reuse (and repair) items dont
use throw- aways11. Get on demand
water heater.12. Winterize house.13. Buy C
offset for travel.
2
for Tuesday
  • Go to www.worldchanging.com
  • Select one article, read it, print first page
    (only) and bring to lecture.
  • 1 Stuff 5 Business
  • 2 Shelter 6 Politics
  • 3 Cities 7 Planet
  • 4 Community 8 Any of 1-7

3
OBJECTIVES
  • Human Activities Alter Nutrient Cycles
  • Relates to Intersystem Cycles
  • Inputs/Outputs disrupted--gtconsequences
  • Water
  • Carbon
  • Nitrogen
  • Ozone
  • Phosphorus
  • Sulfur

4
Intersystem cycling Nutrients gained (input) and
lost (output) by an ecosystem

Ecosystem 2
Ecosystem 1
Ecosystem 1
2
Input ?
?
?
Output ?
Input ?

? output
?
?
5
Intersystem cycling
--gtInput from waterflow
6
Nutrient inputs on land from
  • Lithosphere (weathering of bedrock and
  • soil)
  • Atmosphere
  • Wetfall (in precipitation)
  • Dryfall (particles)
  • Hydrosphere
  • Human Activities

7
Nutrient losses (output) on land to
  • Atmosphere
  • Streams and groundwater
  • How do human activities alter output?

8
WATER
9
Global BGC cycles Water cycle a physical model

Figure 3
50 of water in the Amazon Basin is internally
recycled. Predict how deforestation there might
be affecting the hydrologic (water) cycle and the
forest.
10
CARBON
11
Carbon cycle What are 2 new fluxes due to
human activities? What pools are being altered?
Figure 6
The missing C sink
12
snow intact

snow removed
13
intact
removed
14
WILDFIRES
15
NITROGEN
16
How are humans altering the N cycle?
  • Nitrogen-fixing crops
  • Fossil fuel burning
  • Nitrogen fertilizer
  • Animal feed lots manure
  • Invasive species fix N2
  • Consequences
  • greenhouse gases
  • nitrogen saturation
  • runoff - aquatic systems water supply
  • biodiversity and species mix

17
OZONE
18
Ozone (O3) UV radiation
  • 1. at surface
  • O2 with NO2 with light --gt O3
  • NO2 from burning gas in cars
  • Ozone oxidant of organic molecules
  • SOYFACE elevated O3 lowers crop
  • productivity

19
2. Ozone in upper atmosphere blocks UV CFCs
and creates black hole
20
PHOSPHORUS
21
Phosphorus concentration controls the trophic
structure and productivity of lakes.
CNP
CN
22
  • Human activities affect input from land to
  • water
  • runoff/seepage into groundwater/aquifers
  • agriculture land, especially NPK
  • animal feedlots, especially N
  • sewage input, C, N

23
Human eutrophication (overproduction of organic
matter in aquatic systems) is harmful.
  • Added nutrients stimulate algal GPP, BUT
  • Too much overwhelms intrasystem regeneration
  • Increase in organic matter increased
    sediments
  • Energy flows to bacteria, not higher trophic
    level
  • Increase in decomposition use of oxygen
  • ---gt depletes oxygen
  • ---gt kills aerobes, including fish

24
Consequences for aquatic systems
  • change freshwater aquatic communities
  • create dead zones in oceans
  • lower quality of drinking water

25
Dead zones around earth
26
SULFUR
27
SO4 emissions from copper smelter
28
(Sulfuric) acid drainage from coal mines.
29
pH profoundly affects ecosystems, especially
aquatic systems.
30
Rise in pH with decreased SO4 emissions
31
Acid rain from coal-burning industries affects
forest growth. Slow recovery from its effects
32
Effects of acid rain on a forest.Why is damage
greater on 1 side of mt.?Why havent forests
recovered when acid rain was lessened?
33
Lessons from acid rain research
34
The hierarchical nature and processes of
different levels of ecological systems
35
Our Ecological Footprint
  • How do our life style choices at the
  • individual level impact higher levels of
  • ecological organization?
  • How does a choice impact energy flow
  • and cycling of matter?
  • H2O C N ozone P S
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