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Learning Recap . With reference to a case study describe how coral reef areas can be managed (6 marks- 6 minutes) . What is a Mangrove? . Learning objectives . To know what a mangrove is and where they are located Describe the characteristics, distribution and biodiversity of mangroves

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learning recap

Learning Recap

With reference to a case study describe how coral reef areas can be managed

(6 marks- 6 minutes)

learning objectives
Learning objectives
  • To know what a mangrove is and where they are located
  • Describe the characteristics, distribution and biodiversity of mangroves
  • Explain the factors that are threatening Mangroves and how these are being managed.
slide5

A Mangrove is a collection of trees and shrubs that grow in saline coastal sediment habitats.

They are most common in S-E Asia. Most mangroves are found within 30 degrees latitude from the equator.

living on the edge
Living on the ‘edge’
  • Mangroves live life on the edge. With one foot on land and one in the sea, these botanical amphibians occupy a zone of desiccating heat, choking mud, and salt levels that would kill an ordinary plant within hours.
  • Yet the forests mangroves form are among the most productive and biologically complex ecosystems on Earth. Birds roost in the canopy, shellfish attach themselves to the roots, and snakes and crocodiles come to hunt. Mangroves provide nursery grounds for fish; a food source for monkeys, deer, tree-climbing crabs, even kangaroos; and a nectar source for bats and honeybees!!
mind mapping hyperlink to video clip
Mind mapping- hyperlink to video clip

Characteristics

Distribution

Mangroves

Case study

Value

slide9
Which of these have you achieved? Write down the learning objective that you have completed this lesson
  • To know what a mangrove is and where they are located
  • Describe the characteristics, distribution and biodiversity of mangroves
  • Explain the factors that are threatening Mangroves and how these are being managed.
tigers in mangrove forest face climate change threat
Tigers in Mangrove Forest Face Climate Change Threat
  • Published: February 16th, 2013
  • By John Vidal, The Guardian
  • A vast mangrove forest shared by India and Bangladesh that is home to possibly 500 Bengal tigers is being rapidly destroyed by erosion, rising sea levels and storm surges, according to a major study by researchers at the Zoological Society of London (ZSL) and others.
  • The Sundarbans forest took the brunt of super cyclone Sidr in 2007, but new satellite studies show that 71 percent of the forested coastline is retreating by as much as 655 feet a year. If erosion continues at this pace, already threatened tiger populations living in the forests will be put further at risk.
  • Satellite studies show that 71 percent of the forested coastline is retreating by as much as 655 feet a year. If erosion continues at this pace, already threatened tiger populations living in the forests will be put further at risk. Credit: EPA/PiyalAdhikary
  • Natalie Pettorelli, one of the report's authors, said: "Coastline retreat is evident everywhere. A continuing rate of retreat would see these parts of the mangrove disappear within 50 years. On the Indian side of the Sundarbans, the island which extends most into the Bay of Bengal has receded by an average of 490 feet a year, with a maximum of just over 655 feet; this would see the disappearance of the island in about 20 years."
  • The Sundarbans are known for vanishing islands but the scientists said the current retreat of the mangrove forests on the southern coastline is not normal. "The causes for increasing coastline retreat, other than direct anthropogenic ones, include increased frequency of storm surges and other extreme natural events, rises in sea-level and increased salinity, which increases the vulnerability of mangroves," said Pettorelli.
  • "Our results indicate a rapidly retreating coastline that cannot be accounted for by the regular dynamics of the Sundarbans. Degradation is happening fast, weakening this natural shield for India and Bangladesh.
  • "As human development thrives, and global temperature continues to rise, natural protection from tidal waves and cyclones is being degraded at alarming rates. This will inevitably lead to species loss in this richly biodiverse part of the world, if nothing is done to stop it.
  • "The Sundarbans is a critical tiger habitat; one of only a handful of remaining forests big enough to hold several hundred tigers. To lose the Sundarbans would be to move a step closer to the extinction of these majestic animals," said ZSL tiger expert Sarah Christie.