Mangroves
<ul><li>salt-tolerant, woody trees – really land plants </li></ul><ul><li>flowering plants - with true roots, stems, and l...
<ul><li>warm, tropical and sub-tropical regions </li></ul><ul><li>cover 60 – 75% of tropical shores  </li></ul>
<ul><li>found in protected, coastal areas </li></ul>
<ul><li>intertidal </li></ul><ul><li>where salt marshes would be in temperate zone </li></ul>
<ul><li>salty, muddy water </li></ul><ul><li>anaerobic sediments </li></ul>
Functions: <ul><li>protect coastal lands from storms and erosion </li></ul><ul><li>filter runoff </li></ul><ul><li>accrete...
<ul><li>gradually extend land seaward – eventually replaced by land plants =  ecological succession   </li></ul>Functions:
Habitat Value: <ul><li>very important for </li></ul><ul><li>other organisms </li></ul><ul><li>epiphytic organisms live on ...
Habitat Value: <ul><li>some species live in mud: </li></ul><ul><li>crabs, mudskippers (Pacific) </li></ul>
Habitat Value: <ul><li>many juvenile coral reef fish live here (later move to reef) </li></ul><ul><li>food and protection ...
Habitat Value: <ul><li>many birds nest in branches away from land predators: </li></ul><ul><li>egrets, doves, pelicans, et...
Zonation <ul><li>four main types in Caribbean: </li></ul><ul><li>red, black, white, buttonwood – moving inland </li></ul>
different types of mangroves
 
Red Mangrove <ul><li>most prominent </li></ul><ul><li>large prop roots </li></ul><ul><li>anchor trees in soft mud </li></u...
Red Mangrove <ul><li>thick, waxy leaves - reduce water loss </li></ul><ul><li>exclude salt at roots </li></ul>
Red Mangroves <ul><li>pencil seeds  - germinate while still attached to the tree </li></ul><ul><li>pointy – if low tide - ...
Black Mangroves <ul><li>next inland </li></ul><ul><li>snorkel roots  – ( pneumatophores ) </li></ul><ul><li>- environment ...
Black Mangroves
Black Mangroves <ul><li>salt pores  (glands) - secrete excess salt from plant  </li></ul><ul><li>can sometimes see salt cr...
White Mangroves <ul><li>farthest from water </li></ul><ul><li>cannot tolerate  </li></ul><ul><li>flooding </li></ul>
White Mangroves <ul><li>excrete salt from leaves and at base of stem – salt glands </li></ul>
Buttonwood <ul><li>not true mangrove, but mangrove associate  </li></ul>
Human Uses <ul><li>protect coastal lands from storms and erosion, filter runoff </li></ul><ul><li>ex: tsunami </li></ul><u...
Human Uses <ul><li>cutting to make charcoal </li></ul><ul><li>honey from flowers </li></ul><ul><li>medicine - from bark </...
Human Impacts <ul><li>half of world’s mangroves destroyed – more in Southeast asia </li></ul><ul><li>cut to make marinas -...
Human Impacts <ul><li>filled in land - for development </li></ul><ul><li>ex: St. Thomas racetrack built  on filled in mang...
Human Impacts <ul><li>destroyed for shrimp mariculture – for ponds </li></ul>
<ul><li>mangroves are a critical habitat to be restored </li></ul>
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Mangroves power point

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Mangroves power point

  1. 1. Mangroves
  2. 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. 3. <ul><li>warm, tropical and sub-tropical regions </li></ul><ul><li>cover 60 – 75% of tropical shores </li></ul>
  4. 4. <ul><li>found in protected, coastal areas </li></ul>
  5. 5. <ul><li>intertidal </li></ul><ul><li>where salt marshes would be in temperate zone </li></ul>
  6. 6. <ul><li>salty, muddy water </li></ul><ul><li>anaerobic sediments </li></ul>
  7. 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. 8. <ul><li>gradually extend land seaward – eventually replaced by land plants = ecological succession </li></ul>Functions:
  9. 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. 10. Habitat Value: <ul><li>some species live in mud: </li></ul><ul><li>crabs, mudskippers (Pacific) </li></ul>
  11. 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. 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. 13. Zonation <ul><li>four main types in Caribbean: </li></ul><ul><li>red, black, white, buttonwood – moving inland </li></ul>
  14. 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>
  16. 17. Red Mangrove <ul><li>thick, waxy leaves - reduce water loss </li></ul><ul><li>exclude salt at roots </li></ul>
  17. 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>
  18. 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>
  19. 20. Black Mangroves
  20. 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>
  21. 22. White Mangroves <ul><li>farthest from water </li></ul><ul><li>cannot tolerate </li></ul><ul><li>flooding </li></ul>
  22. 23. White Mangroves <ul><li>excrete salt from leaves and at base of stem – salt glands </li></ul>
  23. 24. Buttonwood <ul><li>not true mangrove, but mangrove associate </li></ul>
  24. 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>
  25. 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>
  26. 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>
  27. 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>
  28. 29. Human Impacts <ul><li>destroyed for shrimp mariculture – for ponds </li></ul>
  29. 30. <ul><li>mangroves are a critical habitat to be restored </li></ul>
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