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Humans, Trees, and the Desert

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General interest discussions, not necessarily related to depletion.

Humans, Trees, and the Desert

Unread postby Ludi » Wed 04 Jul 2007, 18:04:13

"A huge chunk of Niger is Sahara desert, and what's not outright desert gets just a smattering of rain. You don't expect to see a lot of trees in this land-locked, West African country.

But that's exactly what ecologist Mahamane Larwanou and geographer Gray Tappan see when they roll out a satellite photo of central Niger. Both are passionate about understanding why trees are making a big comeback in many parts of Niger .

In Niger , trees aren't just aesthetic. They are essential. Ninety percent of the nation's energy comes in the form of firewood. Trees also feed animals, nourish the soil, provide wood for construction, and bear fruit and lucrative products, like gum Arabic. And unlike most crops, trees can survive the inevitable hard times when the climate suddenly turns even drier and more hostile."

npr story

"February 11, 2007
In Niger, Trees and Crops Turn Back the Desert

By LYDIA POLGREEN
GUIDAN BAKOYE, Niger — In this dust-choked region, long seen as an increasingly barren wasteland decaying into desert, millions of trees are flourishing, thanks in part to poor farmers whose simple methods cost little or nothing at all.

Better conservation and improved rainfall have led to at least 7.4 million newly tree-covered acres in Niger, researchers have found, achieved largely without relying on the large-scale planting of trees or other expensive methods often advocated by African politicians and aid groups for halting desertification, the process by which soil loses its fertility.

Recent studies of vegetation patterns, based on detailed satellite images and on-the-ground inventories of trees, have found that Niger, a place of persistent hunger and deprivation, has recently added millions of new trees and is now far greener than it was 30 years ago.

These gains, moreover, have come at a time when the population of Niger has exploded, confounding the conventional wisdom that population growth leads to the loss of trees and accelerates land degradation, scientists studying Niger say...

...Severe drought in the 1970s and ’80s, coupled with a population explosion and destructive farming and livestock practices, was denuding vast swaths of land. The desert seemed determined to swallow everything. So Mr. Danjimo and other farmers in Guidan Bakoye took a small but radical step. No longer would they clear the saplings from their fields before planting, as they had for generations. Instead they would protect and nurture them, carefully plowing around them when sowing millet, sorghum, peanuts and beans.

Today, the success in growing new trees suggests that the harm to much of the Sahel may not have been permanent, but a temporary loss of fertility. The evidence, scientists say, demonstrates how relatively small changes in human behavior can transform the regional ecology, restoring its biodiversity and productivity.

article
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Re: Humans, Trees, and the Desert

Unread postby coyote » Wed 04 Jul 2007, 19:09:15

An inspirational story.

I've read of other cases wherein silviculture has had a very positive impact on restoring agricultural lands, notably the New Guinea highlanders example in Jared Diamond's Collapse.

More broadly, it's an indication that natural systems are 'eager' to rebound, if we can just stop the destruction for a bit.

Very, very interesting times... but there is still some hope.
Lord, here comes the flood
We'll say goodbye to flesh and blood
If again the seas are silent in any still alive
It'll be those who gave their island to survive...
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Re: Humans, Trees, and the Desert

Unread postby I_Like_Plants » Wed 04 Jul 2007, 23:29:52

bravo, people of Niger!

Maybe there is hope, when people realize trees = life.
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