Geog_101_Nov_16

Geog_101_Nov_16 - Human Impacts Human on on Natural Systems...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Highway Human Impacts Human Impacts on on Natural Systems Natural Systems Amazon: trans-Amazonian highway just built
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Nov. 18 The Great Squeeze (68’)
Background image of page 2
Video: Nov. 30 Cane Toads: an unnatural history
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Human Impacts on environment Humans : incredible power to modify & impact environment Some unavoidable: Consumption of resources Production of wastes Food production Human geography examines this relationship Impacts, scope? Causes Spatial distribution Reducing impacts?
Background image of page 4
Reducing Human Impacts Reducing consumption & waste production Efficiency Laws, regulations, policies Technologies Behavioural modification Incentives Penalties Awareness modification
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The total earth moved in the past 5000 yr could build a 4000- m-high mountain range, 40 km wide and 100 km long . (Hooke 2000) http://www.gsajournals.org/archive/0091-7613/28/9/pdf/i0091-7613-28-9-843.pd
Background image of page 6
Human landscape modification Agriculture Forest conversion Clearcuts: cultural landscapes (Oregon) 50% clearcut in the last 20 years Human settlements Species: Habitat modification Introduced species Extinctions
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
‘Seascape’ modification: Fisheries Before After Scallop-dragging Otter/bottom/scallop trawls Habitat dredged/trawled in one year
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduced Species ‘Invasive species’ or ‘introduced species >50,000 exotics in US, $10-20 billion damage Impact on biodiversity second only to human habitat disturbance Small proportion purposefully introduced Asian ‘snakehead’: 50 kms from Great Lakes Cane toad Most accidental Zebra Mussel
Background image of page 10
A few definitions “Human Impact”: any change , positive or negative, caused by the actions of humans . “Natural systems”: the sum of Environment Ecosphere Atmosphere Hydrosphere Lithosphere Biomes & Ecosystems Madagascar erosion
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
The variable ecosphere
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/19/2011 for the course GEOG 101 taught by Professor Brent during the Spring '11 term at Waterloo.

Page1 / 44

Geog_101_Nov_16 - Human Impacts Human on on Natural Systems...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online