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Brainstorm. List the factors that you think lead to a loss of diversity. Do you think the loss of diversity is the same from country to country? Why / why not?. Learning outcomes. You will all be able to: Identify the factors that lead to a loss of diversity Most of you should be able to:

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Brainstorm

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Brainstorm

Brainstorm

  • List the factors that you think lead to a loss of diversity.

  • Do you think the loss of diversity is the same from country to country?

  • Why / why not?


Learning outcomes

Learning outcomes

  • You will all be able to:

    • Identify the factors that lead to a loss of diversity

  • Most of you should be able to:

    • Discuss the value of tropical forests in contributing to global biodiversity

  • Some of you might be able to:

    • Explain why tropical rainforests are vulnerable to disturbance.


Natural hazards

Natural Hazards

Volcanic eruption

Avalanche

Landslide

http://www.uvm.edu

http://www.cosmosmagazine.com/news/3025/australia-threat-volcanic-eruption

Earthquake

http://www.preview-risk.com

Tsunami

Natural fire

http://www.floridaforestservice.com/publications/fires_natural_role.html

http://tsun.sscc.ru/

http://library.thinkquest.org/


Environmental disasters

Environmental disasters

Loss of tropical rainforest

Oil Spills

http://www.guardian.co.uk/environment/2008/may/15/forests.brazil

http://library.thinkquest.org/CR0215471/oil_spills.htm


Brainstorm

Habitat fragmentation

  • Pollution: (topic 5)

  • Spraying of pesticides

  • Oil spills

  • Factory emissions

  • Fertilizer run-off

  • Toxic chemical in the food chain

  • Climate change

http://wildflowerturfblog.wildflowerturf.co.uk/2012/02/16/habitat-fragmentation/

Overexploitation

North Atlantic Bluefin tuna

http://my.telegraph.co.uk/blueplanet/page/9/

http://bio1152.nicerweb.com/Locked/media/ch56/overexploitation.html


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Introducing non-native species

Japanese Knotweed

Black rat (Rattusrattus)

http://www.cumberlandcd.com/~amcclain/ccwa/knotweed.html

http://www.uniprot.org/taxonomy/10117

Rhododendron

Grey squirrel

homepages.abdn.ac.ukl

http://www.donnan.com/rhododendron.htm


Brainstorm

Rabbits

Red Fox

http://animal.discovery.com/mammals/rabbit/

http://www.dpiw.tas.gov.au/inter/nsf/WebPages/LBUN-5K43KE?open

Australia

Cane Toad

Camels

http://www.camelsaust.com.au/history.htm

http://www.telegraph.co.uk/earth/wildlife/9328504/


Brainstorm

  • Modern Agricultural practices:

  • GM crops

  • Monocultures

  • Pesticides

  • Spread of disease:

  • Bird flu

  • BSE

  • Tuberculosis

  • Domesticated to wild and vice versa


Importance of tropical rainforests

Importance of tropical rainforests

  • Read the article and try to remember as many of the facts as you can…

  • We will have a test!


See how many you can remember

See how many you can remember…

  • If Amazonia were a country, it would be the largest in the world.

  • More than 20 percent of the world’s is produced in the Amazon Rainforest.

  • More than half of the world's estimated species of plants, animals and insects live in the tropical rainforests.

  • One hectare (2.47 acres) may contain over 750 types of and 1500 species of higher plants.

  • Rainforests once covered of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.


W hat makes rainforests valuable

What makes rainforests valuable?

  • Individually on the piece of paper provided write down your ideas.

  • Think about the following factors:

    • Biodiversity

    • Climate

    • Oxygen


Another factor green politics

Another factor - “Green politics”

  • What do you think “green politics” are?

  • What do you think is the relationship between rainforests and “green politics”?


Rainforests are often called biodiversity hotspots

Rainforests are often called biodiversity hotspots.

What is it that makes them so diverse in terms of species?

www.tumblr.com

They contain a lot of long-lived species and it has taken thousands of years for them to develop. If they are damaged it will take a long time for them to regenerate. Why?


Brainstorm

Read the facts from the National Geographic article “Rain Forest Threats” and relate this to what we have been looking at on the loss and retention of diversity.

Using this, write down the factors that make rainforests vulnerable to disappearance.

Think about:

  • The complexity of the ecosystem

  • Soil nutrients

  • Human activity

http://environment.nationalgeographic.com/environment/habitats/rainforest-threats/


Check learning outcome booklets

Check learning outcome booklets

  • You should be able to do:

    • 4.2.1 – identify factors that lead to loss of biodiversity

    • 4.2.2 – discuss the perceived vulnerability of tropical rainforests and their relative value in contributing to global biodiversity


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