Posts Tagged ‘Forest’
American Chestnut is Making a Comeback
Thursday, March 19th, 2009
The American chestnut was a magnificent tree which mainly resided on the east coast of America, dominating forests from Maine to Georgia. It grew to over 100ft and most had a diameter of up to 5ft. These trees were massive and incredibly popular.
They were strong, growing with a straight grain and were rot resistant. This meant they were perfect for making almost anything from railway sleepers to furniture. The American chestnut also provided an excellent food source for both humans and wildlife, producing a yearly crop of lovely brown chestnuts.
In the late 1800’s Americans introduced a new species of chestnut tree, the Asian chestnut. This was a big mistake as these trees carried a disease called Cryphonectria parasitica or chestnut blight, which would soon almost wipe out the good old American chestnut.
Unfortunately the American chestnut has been hit hard by blight in the past 100 years and is almost extinct. Blight spreads easily and very quickly, simply on the wind or by small animals. Also Oak trees, which are not affected by the disease, can act as carriers. The disease gets into the natural cracks in the American chestnut and spreads around the tree, the tree then dies from there up.
The American Chestnut Foundation (TACF), which was set up in 1983 is now working hard to bring the tree back. They are hoping to breed a blight resistant strain which will have the same attributes as the original American chestnut. The goal of the breeding program is to combine the blight resistance of the Asian chestnut with the desirable characteristics of the American chestnut.
Hopefully the cross pollination breeding program will work and American chestnut trees will once again dominate the East coast of America.
Tags: American chestnut, Asian chestnut, Blight, extinct, Forest
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Trees are Getting Bigger and Better
Tuesday, March 3rd, 2009
According to Greenpeace rainforest trees are getting bigger, which is excellent in the battle against climate change.
A group of scientists who are reporting on a 40 year study of African tropical forests have found that over the past few decades each hectare of intact African forest has trapped an extra 0.6 tonnes of carbon per year.
Dr Simon Lewis, a Royal Society research fellow at the University of Leeds, and the lead author of the paper says that “we are receiving a free subsidy from nature,” because “tropical forest trees are absorbing about 18 per cent of the CO2 added to the atmosphere each year from burning fossil fuels, substantially buffering the rate of climate change”.
This study has been based on 3 major forests, the Amazon in South America, the Paradise Forests in south east Asia, and the forests of the Congo Basin in central Africa. Each one an essential part of the worlds eco system, slowly helping to remove some of the carbon monoxide we produce daily.
Dr Lee White, co-author on the study and Gabon’s chief climate change scientist, said: “To get an idea of the value of the sink, the removal of nearly 5 billion tonnes of carbon dioxide from the atmosphere by intact tropical forests, based on realistic prices for a tonne of carbon, should be valued at around £13 billion per year. This is a compelling argument for conserving tropical forests.”
Rainforests are amazing they actually suck the carbon monoxide from the air, expelling oxygen. These rainforest are slowly being destroyed basically for human pleasure.
Unfortunately, at the moment we are not valuing these ancient forests for what they provide. Worldwide, rainforests are still being cut down and degraded at a staggering rate. They urgently need protecting. Charities like Greenpeace are doing all they can to highlight this issue to people in position of power so that something will be done.
Funding and education are essential to the cause so that the people living in these forests can understand their importance and see value in keeping the forests how they are rather than cutting them down.
We all know the world is changing perhaps this study will finally highlight the importance of trees. Forests have been destroyed all over the world and each hectare which disappears takes away some of our protection from Co2 and climate change.
It is estimated that 13 million hectares of the worlds forests are destroyed each year, 6 million of these have been largely untouched and undisturbed by man.
The result of this major deforestation is a loss of habitat for wildlife and also a reduction or complete removal of the ecosystem services provided by these forests.
Its time to stop, look and listen… we can not afford to keep destroying the planet in this way, no matter how much economic value is in the land and trees themselves.
Tags: Climate Change, Forest, global warming, Greenpeace, rainforest, science, trees, wildlife
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Humans and Trees: A Shared History
Friday, March 28th, 2008
Trees have been around much, much longer than people have.
The first real species of tree was called Archaeopteris, and it evolved approximately 370 million years ago. Over many years, other species of tree followed. At one point, before the continents broke apart, almost all of the earth’s land mass was covered by trees. Trees helped encourage the evolution of new and more complex species of animals, by changing oxygen into carbon dioxide and by forming new habitats that encouraged the growth of biodiversity.
It’s no wonder, then, that trees have played such a vital role in the human imagination. Trees can live much longer than humans-they are taller than us, and seem older and sometimes wiser than us. (more…)
Tags: archaeopteris, carbon, Forest, oxygen, Tree, yggdrasil
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Trees and the Environment
Friday, February 1st, 2008
Why are we planting all of these trees, anyway?
One reason, of course, would be to simply restore the landscape of the old coal mine to its original glory. However, there’s another reason that’s even more important-trees also benefit the environment in a plethora of different ways. For example, they can absorb greenhouse gases and fight global warming, clean the air we breathe, and nourish many different types of wildlife.
Trees are nature’s soldiers in the fight against global warming. As they feed themselves, they absorb carbon dioxide from the atmosphere and store it in the form of carbohydrates. The stored carbon remains locked inside the body of tree, keeping it out of the atmosphere. Since carbon dioxide is one of the most common greenhouse gases, planting trees can help put the brakes on the greenhouse effect.
Tags: carbon dioxide, Environment, Forest, global warming, greenhouse, trees
Posted in Environment | No Comments »