Your SlideShare is downloading. ×
The effects of global warming on the marine
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

The effects of global warming on the marine

2,280
views

Published on

Published in: Education

0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,280
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
82
Comments
0
Likes
3
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • http://seagrant.gso.uri.edu/factsheets/fserosion.html
  • Transcript

    • 1. The Effects of Global Warming on the Marine Environment
    • 2. How Global Warming Works
      • The mechanism for global warming
      • is the Greenhouse Effect
      • Greenhouse gases include carbon
      • dioxide (CO 2 ), methane (CH 4 ),
      • CFCs, nitrous oxide (N 2 O), ozone
      • Greenhouse gases prevent infrared
      • radiation from escaping to outer
      • space and it is converted to heat,
      • thereby increasing atmospheric
      • temperatures
    • 3. How Global Warming Works
    • 4. How Global Warming Works
      • CO 2 is the most important
      • greenhouse gas
      • CO 2 is released from the
        • burning of fossil fuels –
        • coal, oil, natural gas
      • CO2 is easily absorbed by
      • the oceans – up to a point
          • - dissolves in water
          • - used in photosynthesis
    • 5. How Global Warming Works
      • CO 2 levels have increased 30% since
      • before the Industrial Revolution
    • 6. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 7. Impacts: Changes to Ocean Temperature
      • If atmosphere warms, ocean warms
      • Most marine organisms spawn (reproduce) in response
      • to temperature cues –
      • will reproduce at wrong
      • time
    • 8. Impacts: Changes to Ocean Temperature
      • Phytoplankton bloom in response to light and temperature cues
      • Changes will impact
      • food webs
    • 9. Impacts: Changes to Ocean Temperature
      • Migrations are in response to temperature
      • May impact fisheries
    • 10. Impacts: Changes to Ocean Temperature
      • coral bleaching
        • as reefs become warmer, corals expel symbiotic algae and become “bleached”
        • leads to loss of habitat and food for reef-dependant species
    • 11. Impacts: Changes to Ocean Temperature
      • hypoxia – low levels of dissolved oxygen
        • warmer water temperatures increase the chances that available oxygen will be used up more rapidly by existing organisms
    • 12. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 13. Impacts: Changes to Ocean Currents
      • like a giant conveyor belt – carrying warm
      • and cold water from shallow to deep
      • and deep to shallow
      • global warming may stop/change this flow
    • 14. Impacts: Changes to Ocean Currents
      • carry different temperature water
      • currents moderate coastal climate
      • ex: England
      Gulf Stream Current
    • 15. Impacts: Changes to Ocean Currents
      • ocean currents:
      • transport planktonic (drifting) organisms
      • distribute eggs and larvae
      • bring food and oxygen to
      • sessile organisms
      • remove wastes and pollutants
    • 16. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 17. Impacts: Localized Salinity Changes
      • salinity – measure of dissolved solids
      • in water
      • organisms have specific salinity ranges in
      • which they can survive
    • 18. Impacts: Localized Salinity Changes
      • glaciers are fresh water
      • melting will locally decrease salinity
      • and impact organisms
      • freshwater can also change deep sea
      • circulation
    • 19. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 20. Impacts: Sea Level Rise
      • water in glaciers is on land
      • as glaciers melt, water is added to ocean
      • as water heats, it expands
      • both raise sea level world wide
    • 21. Impacts: Sea Level Rise
      • destroys coastal habitats
      • ex: salt marshes, mangroves
      • destroys human
      • property
      • increased pollution
      • decreased freshwater
      • supplies
    • 22. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 23. Impacts: Ocean Acidification
      • CO 2 absorbed by the ocean makes it more acidic
      • can kill phytoplankton resulting in major food web effects
    • 24. Impacts: Ocean Acidification
      • calcium carbonate (CaCO 3 ) shells dissolve or are harder to make – organisms cannot survive
      • acidosis – build up of carbonic acid in organisms
    • 25. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 26. Impacts: Increase in Severe Weather Events
      • hurricanes need warm water to form
      • warming of ocean waters may increase the number of hurricanes or their intensity
    • 27. Impacts: Increase in Severe Weather Events
      • increased strength and number of hurricanes can lead to:
      • - habitat destruction
      • - property destruction
    • 28. Major Impacts
      • Changes to ocean temperature
      • Changes to ocean currents
      • Localized salinity changes
      • Sea level rise
      • Ocean acidification
      • Increase in severe weather events
      • Invasive Species, Changes to Habitats and Food Supply
    • 29. Impacts: Invasive Species, Changes to Habitats and Food Supply
      • invasive species – non-native species that adversely affect a habitat
        • warmer waters make it easier for invading species to gain a foothold
        • can consume or outcompete native species
      invasive algae covering coral reef 
    • 30. Impacts: Invasive Species, Changes to Habitats and Food Supply
        • all impacts can result in the loss of coastal and marine habitat, disruption of the food web and loss of biodiversity