resources & biodiversity

8/14/2019 Resources & Biodiversity

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Resources & Biodiversity

Biodiversity is thesum total of

different kinds oforganisms and is

affected byalterations of

habitats andresources.


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Renewable resources

Can regenerate if

they are alive

Can bereplenished by

biochemical cycles

if nonliving.

Renewable

resources are not

unlimited.


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Types of renewable resources

Solar energy

Wind

Land Hydro- power

Wood

Fish Geothermal power


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Non-Renewable resources

Cannot be

renewed through

natural processes.

Fossil fuels

Coal

Natural gas Oil


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Sustainable development

Using natural resources without depleting

them.

Providing for human needs withoutcausing long-term environmental harm

Human activities can affect the quality

and supply of renewable resources such

as land, forests, fisheries, air and fresh

water.


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What are clean fossil fuels?

Hydrogen

Fuel Cells

Energy research Centre of NREL: Hydrogen and Fuel
http://www.ecn.nl/en/h2sf/http://www.nrel.gov/hydrogen/systems_engineering.htmlhttp://www.nrel.gov/hydrogen/systems_engineering.htmlhttp://www.ecn.nl/en/h2sf/


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Biodiversity

Why is it important?

What are the current

threats?

What is the goal ofconservation biology?


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Biodiversity=Variety

HOT SPOTS

Biodiversity is one of

Earths greatest

natural resources. Medicines

Genetic variety

Species variety
http://www.biodiversityhotspots.org/xp/Hotspots/pages/map.aspxhttp://www.altnature.com/gallery/http://www.altnature.com/gallery/http://www.biodiversityhotspots.org/xp/Hotspots/pages/map.aspx


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Threats to Biodiversity

Habitat alteration-overdeveloped landdestroys the naturalhabitat.

Over hunting, commericalfishing and illegalpoaching

Pollution- oil spills, urbanrunoff

Non-native species

Climate change
http://www.eoearth.org/article/Poachinghttp://www.eoearth.org/image/Hunters_with_a_net_rapped_on_a_stick_and_a_spear.jpghttp://www.eoearth.org/article/Poaching


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DDT-Dichloro-Diphenyl-Trichloroethane

Was thought to be a

perfect pesticide-

cheap, remains active

for a long time, killsmany different types

of insects, kills

mosquitoes.

Banned in 1972

Rachel Carsons

book: Silent Spring


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Introduced Species

Non-native species

introduced by

humans.

Scientists assessedthe threat level of

329 marine invasive

species

3. Pacific sea star-

Australia

4. Green algae
http://www.dse.vic.gov.au/DSE/nrencm.nsf/LinkView/8146C236CC417D764A256A10007F062D92CD71AF8C1AF2E74A2567CA00817767http://www.hawaii.edu/reefalgae/invasive_algae/http://www.hawaii.edu/reefalgae/invasive_algae/http://www.dse.vic.gov.au/DSE/nrencm.nsf/LinkView/8146C236CC417D764A256A10007F062D92CD71AF8C1AF2E74A2567CA00817767


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Comb jelly

Reproduces

exponentially without

any predators. NorthAmerican species

which has devastated

fisheries in the Black

and Caspian Seas.
http://www.imagequest3d.com/catalogue/ctenophores/pages/h100_jpg.htmhttp://www.imagequest3d.com/catalogue/ctenophores/pages/h064_jpg.htmhttp://www.imagequest3d.com/catalogue/ctenophores/pages/h030_jpg.htm


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Conservation efforts

1854- Henry David Thoreau

1872- Yellowstone

1892- John Muir Sierra Club

1896- Harriet Hemenway

1900-Lacey Act

1933- Civilian ConservationCorps

1966- Endangered Species

Act 1970- Earth Day

1992-Earth Summit
http://en.wikipedia.org/wiki/Image:John_Muir_Cane.JPGhttp://en.wikipedia.org/wiki/Image:Henry_David_Thoreau.jpg


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Review

1. Why is biodiversity worth

preserving?

2. List 4 threats to biodiversity.

3. Why are habitats limitedresources?

4. What problems could result from

introducing a non-native speciesinto a new habitat.
http://www.nature.org/wherewework/northamerica/canada/features/

resources & biodiversity

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