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Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
Mangroves power point
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Mangroves power point

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  • 1. Mangroves
  • 2. <ul><li>salt-tolerant, woody trees – really land plants </li></ul><ul><li>flowering plants - with true roots, stems, and leaves </li></ul>
  • 3. <ul><li>warm, tropical and sub-tropical regions </li></ul><ul><li>cover 60 – 75% of tropical shores </li></ul>
  • 4. <ul><li>found in protected, coastal areas </li></ul>
  • 5. <ul><li>intertidal </li></ul><ul><li>where salt marshes would be in temperate zone </li></ul>
  • 6. <ul><li>salty, muddy water </li></ul><ul><li>anaerobic sediments </li></ul>
  • 7. Functions: <ul><li>protect coastal lands from storms and erosion </li></ul><ul><li>filter runoff </li></ul><ul><li>accrete </li></ul><ul><li>sediments </li></ul>
  • 8. <ul><li>gradually extend land seaward – eventually replaced by land plants = ecological succession </li></ul>Functions:
  • 9. Habitat Value: <ul><li>very important for </li></ul><ul><li>other organisms </li></ul><ul><li>epiphytic organisms live on prop roots: </li></ul><ul><li>sponges, tunicates, worms, anemones, snails, crabs, shrimp, lobster </li></ul>
  • 10. Habitat Value: <ul><li>some species live in mud: </li></ul><ul><li>crabs, mudskippers (Pacific) </li></ul>
  • 11. Habitat Value: <ul><li>many juvenile coral reef fish live here (later move to reef) </li></ul><ul><li>food and protection from predators among roots </li></ul>
  • 12. Habitat Value: <ul><li>many birds nest in branches away from land predators: </li></ul><ul><li>egrets, doves, pelicans, etc </li></ul>
  • 13. Zonation <ul><li>four main types in Caribbean: </li></ul><ul><li>red, black, white, buttonwood – moving inland </li></ul>
  • 14. different types of mangroves
  • 15.  
  • 16. Red Mangrove <ul><li>most prominent </li></ul><ul><li>large prop roots </li></ul><ul><li>anchor trees in soft mud </li></ul><ul><li>stabilize and trap </li></ul><ul><li>sediments </li></ul><ul><li>grow down from </li></ul><ul><li>branches into water </li></ul><ul><li>up to 30 ft. tall </li></ul>
  • 17. Red Mangrove <ul><li>thick, waxy leaves - reduce water loss </li></ul><ul><li>exclude salt at roots </li></ul>
  • 18. Red Mangroves <ul><li>pencil seeds - germinate while still attached to the tree </li></ul><ul><li>pointy – if low tide - falls into mud, sticks there, grows </li></ul><ul><li>if high tide - floats to other areas </li></ul>
  • 19. Black Mangroves <ul><li>next inland </li></ul><ul><li>snorkel roots – ( pneumatophores ) </li></ul><ul><li>- environment more severe than red mangrove </li></ul><ul><li>- anaerobic mud – high decomp. </li></ul><ul><li>- roots grow upward </li></ul><ul><li>- obtain oxygen from air above - act as straws </li></ul>
  • 20. Black Mangroves
  • 21. Black Mangroves <ul><li>salt pores (glands) - secrete excess salt from plant </li></ul><ul><li>can sometimes see salt crystals - leaves covered with salt </li></ul>
  • 22. White Mangroves <ul><li>farthest from water </li></ul><ul><li>cannot tolerate </li></ul><ul><li>flooding </li></ul>
  • 23. White Mangroves <ul><li>excrete salt from leaves and at base of stem – salt glands </li></ul>
  • 24. Buttonwood <ul><li>not true mangrove, but mangrove associate </li></ul>
  • 25. Human Uses <ul><li>protect coastal lands from storms and erosion, filter runoff </li></ul><ul><li>ex: tsunami </li></ul><ul><li>- where mangroves removed – land destroyed </li></ul><ul><li>- where mangroves remained – land protected </li></ul>
  • 26. Human Uses <ul><li>cutting to make charcoal </li></ul><ul><li>honey from flowers </li></ul><ul><li>medicine - from bark </li></ul><ul><li>dyes - from bark </li></ul><ul><li>cattle feed - leaves </li></ul>
  • 27. Human Impacts <ul><li>half of world’s mangroves destroyed – more in Southeast asia </li></ul><ul><li>cut to make marinas - destroys habitat and increases erosion </li></ul>
  • 28. Human Impacts <ul><li>filled in land - for development </li></ul><ul><li>ex: St. Thomas racetrack built on filled in mangroves </li></ul><ul><li>broken when boats tie to them </li></ul><ul><li>cut for charcoal </li></ul>
  • 29. Human Impacts <ul><li>destroyed for shrimp mariculture – for ponds </li></ul>
  • 30. <ul><li>mangroves are a critical habitat to be restored </li></ul>

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