Biodiversity case study cards

  • Mangroves
  • Daintree
  • ANWR
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Mangroves

  • Located in estuary mouths and inter-tidal areas
  • Stabilise against erosion
  • Collect sediments 
  • Act as a nursery for coastal fish 
  • Characterised by zonation; white; furthest inland, black; further inland, red; nearest the sea
  • THREATS:
  • Shrimp farming: 
  • By 1961; 50% of mangroves were lost through shrimp farming 
  • $ market in 1970s and 1990s 
  • Increasing global demand 
  • USA imported 500,000 tonnes in 2005
  • Problems with shrimp farming:
  • Waste has to be removed before next crop cycle 
  • Disease and infection
  • Rice fields; salinisation
  • =( depletion of biodiversity 
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Mangroves

  • Climate change:
  • Sea level rise; floods mangroves 
  • Mangroves no longer act as a buffer against hydro... hazards
  • The future:
  • 1985; 80 hectare plots of mangrove forest created (Yadfon) + publicity campaign to protect sea grass from fishing communities 
  • Saving greenbelts; launched range of films to highlight importance of mangroves 
  • Ramsar sites: 1971- Ramsar Convention; international treaty on wetlands; recognises importance of wetlands  
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ANWR

Location:

  • Northern Alaska
  • Artic Tundra; polar climate
  • 19 million acres; believed to be 9-16 billion barrels of oil underneath 

For development:

  • 8% is being explored
  • 735,000 jobs

Key players for: 

  • Alaskan residents; believe that a modern society can combine exploration and sustainable development
  • US government; democrats 
  • Arctic Power
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ANWR

Against development:

  • Biological heartland; 200 species of flaura and fauna
  • Offers a wide range of habitats; snow gees, porcupine river herd
  • Migration routes for birds will be disrupted

Key players against:

  • Environmental groups
  • Gwichin; local tribe; rely on porcupine river herd for clothes, hunting, food
  • Republicans

Due to disagreement ANWR has been 'locked up' future may have to open it up. 

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Daintree

Background:

  • Located in NE Queensland, Austrailia 
  • World Heritage Site 1988; worlds largest number of endangered/ rare species
  • 135 million years old

Threats: 

  • Population growth: 
  • 1983- 1700 
  • 2004- 500,000
  • Tourism growth 
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Daintree

Impacts:

  • Tarmacking 
  • Small businesses losing out; Port Douglas
  • Congestion
  • Westernisation; loss of culture/ traditions
  • Habitat loss; cassowary 

Management:

  • Rainforest Research Council 2004 report
  • Austrailian Rainforest Council; buy back iniative 
  • Cairns Regional Council; management of Daintree; 
  • - increase price of ferry 
  • - many fear Daintree will become Westernised much like Cairns 
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