Green | June 12, 2008 | 23 comments

Trees in warmer climates may fight global warming more effectively: study

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JanforGore
Trees in warm places might be able to shrug off global warming better than those in the UK and colder climes because they contain a remarkable "thermostat" that keeps them the same temperature.

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The temperature inside a healthy tree leaf is affected much less by outside temperature than originally believed, from England to the Caribbean, according to biologists at the University of Pennsylvania.

Researchers found that all tree leaves maintain a near constant temperature
They are concerned that trees in colder regions, such as Britain, could overheat as the climate warms as a result of this hitherto unrecognised mechanism. However, species adapted to warmer climates are likely to take their place.

Surveying 39 tree species ranging in location from subtropical to northerly climates, researchers found a nearly constant temperature in tree leaves.

The conversion of light into chemical energy - photosynthesis - most likely occurs when leaf temperatures are about 21°C, and the outside temperature plays little, if any, role. This means that in colder climates leaf temperatures are elevated and in warmer climates tree leaves cool to keep the temperature just right.

"It is not surprising to think that a polar bear in northern Canada and a black bear in Florida have the same internal body temperature," says Dr Brent Helliker, who reports the work with Suzanna Richter in the journal Nature. "Like us, they generate their own heat.

"However, to think that a black spruce in Canada and a Caribbean Pine in Puerto Rico have the same average leaf temperature is quite astonishing.

"Our research suggests that they use a combination of purely physical phenomena - like the cooling from water evaporation or the warming caused by packing a lot of leaves together - to maintain leaf temperature, a phenomenon we call homeostatisis."

He stresses that this does not mean tree canopies maintain a constant temperature through a day or a season, but rather that this ideal temperature is a long-term target value.
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If true, we then need to be planting more trees in Africa and the Amazon instead of chopping them down. I think this is an interesting find and can lead us to solutions regarding CO2 mitigation.

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23 comments // Trees in warmer climates may fight global warming more effectively: study

  • JanforGore
    • 0
      JanforGore  
    • The UN is undertaking a plan to plant 7 million trees this year... and that should be tied to incentives to keep those trees there. No sense in planting them in areas where illegal loggers will be allowed to cut them down. They should be off limits.

    • 4 years ago
  • jubal
    • 0
      jubal  
    • Massive tree planting campaigns should be undertaken in warmer climates that have experienced considerable clear cutting and deforestation. Financial incentives should be setup to encourage these people responsible for all the deforestation to replant and maintain a mixed environment with farms and trees together.

    • 4 years ago
  • wannabedoc
  • JanforGore
  • JanforGore
    • 0
      JanforGore  
    • This is one of my favorites:

      When all the trees have been cut down,
      when all the animals have been hunted,
      when all the waters are polluted,
      when all the air is unsafe to breathe,
      only then will you discover you cannot eat money.
      ~ Cree Prophecy ~

    • 4 years ago
  • PlatoTacius
    • 0
      PlatoTacius  
    • All good comments...if you've never noticed, the indigenous trees in colder climates will loose their leaves much quicker if a harsh winter is approaching, thereby telling us something... at least they used to...now, the fluctuations in temperatures can be confusing even to a tree...

      F7, I like your comment...If we could only end the corruption in the world, we would find much more agreement through much more dialogue...and diplomacy...

      It is also good to take a tree that is dwarfed by the larger encroaching forest and plant it in the open, so that it can grow healthy and strong...

    • 4 years ago
  • cerealforeal
    • 0
      cerealforeal  
    • We definitely need more trees, and a great way to save trees is by legalizing hemp. One acre of hemp is equal to 4.1 acres of the average forest; and hemp naturally replenishes the soil so the land will always be fertile. Cannabis is the answer to all our problems.

    • 4 years ago
  • johnmcstupid
  • stopnoise
    • 0
      stopnoise  
    • Hey, stopnoise!

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      Ps: Well, By order of Credits, The first credit goes to the original author of the post in UK. The second credit goes to Jan since she is the correspondent author of this post and I am just glad to give my modest contribution to it!

      Thanks everyone that are participating. You got the Fourth credit. Do not stop there as all your opinion really counts.

      Now, to all of those that are voting against, pushing down this post, I am happy to inform that you lost again! However, please continue to do just that as you are contributing to make our victories more enjoyable in the end!

    • 4 years ago
  • current89
  • JanforGore
  • nothing_sacred
    • 0
      nothing_sacred  
    • The article doesn't surprise me. Some plants generate a surprising amount of warmth to attract insects. The difference can be quite a few degrees celsius, which makes a lot of difference to a bee trying to warm up on a dewy morning.
      Anyway my point is that trees (plants) are NOT simple. They are able to make a baffling range of chemicals and toxins which would kill mammalian cells. They tend to have vast amounts of DNA compared to mammals - admittedly most of it is repetitive, but there are incredibly complex control mechanisms going on.
      Finally, it's pretty bloody obvious that plants are natural refridgerators. They evaporate water from their leaves. Evaporation cools the surface because energy is taken by the molecules being liberated from liquid to gas.
      Don't forget that as we increase the atmospheric CO2, certain plants are going to grow even faster and take advantage. For a bit of perspective on climate change, consider this:
      the surface of the planet used to be molten lava and there was no available oxygen. The moon was smashed out of the earth by an enormous cataclysm. The temperature and atmospherics have varied by a hell of a lot more than what we're worrying about now, and global warning can be viewed as a return to normal as we escape the last ice age.

    • 4 years ago
  • huntre
    • 0
      huntre  
    • Jan? "Solutions for Profit" jumps right off the screen.
      Damn good point. Keep it simple.
      Plant a tree. Save a life.

    • 4 years ago
  • JanforGore
    • 0
      JanforGore  
    • Covelogibbs: Absolutely. I just highlighted the Congo and Amazon in my comment because that is where much of the current deforestation is taking place. And here as well where the Great Sequoias have been saved more than once from Bush's axe.

    • 4 years ago
  • JanforGore
    • 0
      JanforGore  
    • Gephoria: I think that is the point behind needing to stop cutting them down in these areas as well as anywhere and planting more everywhere.

    • 4 years ago
  • stopnoise
    • 0
      stopnoise  
    • You're right Covelogibbs! Cutting them down in some areas especially the Amazon turn the soil into desert! Next to that will be the rain and erosion!

    • 4 years ago
  • covelogibbs
    • 0
      covelogibbs  
    • This is interesting, but I think we need to keep in mind that all trees, no matter the climate, are important. It's already open season on most trees here in the states, and we need to stop cutting them down for our pulp needs. There are many annually renewable sources available for pulp, one of the best being hemp. Hemp has much less lignin (the "glue" that holds the plant together) than trees, so it's much easier to break down to get ready for our paper needs. Also, the end result is a vastly superior fiber. I think planting trees all over is an important step, especially in Africa and the Amazon, but not cutting them down in the first place is more important.

    • 4 years ago
  • Gephoria
  • stopnoise
  • JanforGore
    • 0
      JanforGore  
    • You know the thing is, that we as humans are scrambling to find all of these technical "solutions" to make money and make this all look so complex when the solutions are as simple as the trees and sun and within ourselves. Simple living does not mean that you deprive yourself of what you need to survive. It means you live a life in which you use the resources that will sustain you in balance with nature. That is where we have to get back to.The trees are talking to us. We better listen.

    • 4 years ago
  • stopnoise
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