Notices
Results 1 to 13 of 13

Thread: Amazon rain forest oxygen production?

  1. #1 Amazon rain forest oxygen production? 
    New Member
    Join Date
    May 2008
    Posts
    1
    Hey, I've looked at several sites looking for the percentage of the earth's oxygen that the amazon rain forest. They all say a different number. Some say 50% of the earth's oxygen is provided by the amazon rain forest, some say 60%... the range I've seen so far is from 20% to 78%. Anyone have a reliable source for me? Is it just that hard to figure out the real number? Thanks for any input.


    Reply With Quote  
     

  2.  
     

  3. #2  
    New Member
    Join Date
    Feb 2009
    Posts
    1
    http://www.rainforest-alliance.org/r...id=daily_lives


    But just in case you cant find it,

    ["More than 20% of the world’s oxygen is produced by the Amazon rainforest."]

    or


    www.google.com

    keyword: rainforest o2 production

    3rd link down.

    no prob. - i do what i can




    -deuce deuce

    KraZy


    ~Crazy B.[adass] Bone
    Reply With Quote  
     

  4. #3  
    Time Lord
    Join Date
    Apr 2008
    Posts
    5,305
    AFAIK ~70% is marine origin (not even counting oxygen reused there). So 20% Amazon can't be right. We tried a closed ecosystem, and the rainforest portion starved the air for oxygen. Sure the trees put out some, but natural forest floor decomposition claimed more.

    I understand a desire to "save the rainforest". There are better arguments than oxygen.
    A pong by any other name is still a pong. -williampinn
    Reply With Quote  
     

  5. #4  
    Forum Sophomore
    Join Date
    May 2007
    Posts
    180
    The website is that of an activist organization and I'd not take it as fact.

    What are the actual measurments - the relevant publications?
    Reply With Quote  
     

  6. #5  
    Forum Radioactive Isotope skeptic's Avatar
    Join Date
    Nov 2008
    Location
    New Zealand
    Posts
    4,843
    The Amazon rainforest is almost in equilibrium. That means that the oxygen emitted and CO2 taken in are close to equalling oxygen consumed and CO2 emitted. It is not quite in balance, since there is some biomass exported, or stored in soils, which means a slight net emission of oxygen and a slight net absorption of CO2.

    However, the amount of oxygen emitted as a global fraction is very small.

    The forests that produce the greatest net amount of oxygen are those that are still growing. An increase in biomass equals oxygen emitted and CO2 absorbed. This is one reason why it is so important to plant trees.
    Reply With Quote  
     

  7. #6  
    Time Lord
    Join Date
    Apr 2008
    Posts
    5,305
    Quote Originally Posted by skeptic
    This is one reason why it is so important to plant trees.
    ...and harvest them for lumber. :-D
    A pong by any other name is still a pong. -williampinn
    Reply With Quote  
     

  8. #7  
    Forum Sophomore
    Join Date
    May 2007
    Posts
    180
    Thanks skeptic - can you provide the ref for that?
    Reply With Quote  
     

  9. #8  
    Forum Senior Kukhri's Avatar
    Join Date
    Jan 2009
    Location
    North Carolina
    Posts
    392
    Whatever the percentages, the Russian Taiga boreal forests produce more oxygen than the Amazon rainforest.

    Total forest area (millions of ha.)
    Russia: 764
    Brazil: 566
    Canada: 247
    U.S.A.: 210
    China: 134
    Indonesia: 116
    Zaire: 113
    Nordic countries: 53
    All other: 1239
    Co-producer of Red Oasis
    Reply With Quote  
     

  10. #9  
    Forum Sophomore
    Join Date
    May 2007
    Posts
    180
    Does forested area equate to oxygen "production"? Different flora, different climate perhaps other factors - are these significant?
    Reply With Quote  
     

  11. #10  
    Forum Senior Kukhri's Avatar
    Join Date
    Jan 2009
    Location
    North Carolina
    Posts
    392
    As skeptic said, no. I originally heard this from that old Discovery Channel series "Planet Earth" and probably shouldn't be getting my info exclusively from tv. I just provided the forested area chart as a useful refrence.
    Co-producer of Red Oasis
    Reply With Quote  
     

  12. #11  
    Forum Radioactive Isotope skeptic's Avatar
    Join Date
    Nov 2008
    Location
    New Zealand
    Posts
    4,843
    To kukhri
    Forested area is only one factor determining contribution to oxygen release. Other factors include vigor of plant growth (more in rain forests) and whether the forest is growing or is at a climax state.

    Per acre, the most oxygen release comes from a young, growing tropical rainforest.
    Reply With Quote  
     

  13. #12  
    Time Lord
    Join Date
    Apr 2008
    Posts
    5,305
    Quote Originally Posted by skeptic
    whether the forest is growing or is at a climax state
    E.g. was the land formerly covered by ice sheet.
    A pong by any other name is still a pong. -williampinn
    Reply With Quote  
     

  14. #13  
    Forum Sophomore
    Join Date
    Jun 2008
    Location
    The Edge
    Posts
    189
    "Marine origin" is right. Pretty much all of the Earth's oxygen comes from the top few inches of the sea. Phytoplankton. The Amazon doesn't enter into it.
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •