24/04/2019
For us in Wales, replace the word 'desert' with 'Scrub' (overtaken by brambles etc.)...
The bad news is that 70 percent of grasslands are turning to desert. But this can be reversed with holistic management.
How does it work?
A basic evolutionary fact has been staring scientists in the face all along. What do you always find on thriving grasslands? Large, hoofed animals grazing on the grass — buffalo, zebra, gazelles, wildebeest, etc. The grass and the animals evolved together, much like bees and flowering plants. They evolved to rely on each other. They developed characteristics that are adapted to each other.
So if you take away the grass, the hoofed animals die off. And if you take away the hoofed animals, the grassland turns into a desert.
The reason this was not apparent is that once the naturally-occurring hoofed animals were gone from a particular area, they were immediately replaced by domesticated hoofed animals, and these were clearly overgrazing and killing the land. So the obvious solution was to ban domesticated animals from damaged or endangered land areas so the land could recover. So huge plots of land have been made off limits to grazing animals for long stretches of time. But as I said, the land does not recover. It begins to die. And the desertification continues until nothing is left but bare ground.
Domesticated animals made the land turn into desert. But leaving the land alone also made it turn into desert. The biologist Allan Savory has done more to solve this puzzle than any other scientist. The answer was surprising to everyone involved. It didn't really matter which animals were grazing. The key was HOW the animals were grazing. If the hoofed animals graze in a particular way, the grass grows and the deserts turn back into rich grassland. If they graze in any other way, or don't graze at all, the land turns into a desert.
Savory's discovery is this: For grasslands to be healthy they require herds of hoofed animals to graze on it. But they must graze in a natural way, which means: 1) all bunched up as grazing animals do (for safety in numbers — safety from predators), 2) never staying in the same spot for very long, and 3) not coming back to that spot for a while (which allows the grass to grow). If you graze the animals that way, it doesn't matter which hoofed animals are doing the grazing — wild or domestic, or both — the grass begins to thrive.
Thriving grass has many impressive and meaningful consequences. First of all, grass captures moisture. On bare earth, rain runs off (washing away topsoil) and evaporates. When the ground is covered with grass, the plant roots soak up the water and hold it. The grass does the same with CO2, removing it from the air and sequestering it in the earth. Grass also cools the atmosphere and prevents soil erosion. It prevents contamination of groundwater and surface water (because it needs no artificial fertilizer). It turns the falling sunlight into abundant food. And grasses are the foundation of entire ecosystems, so diverse plants and wild animals also get what they need to thrive. Thriving grassland increases biodiversity.
Experts have estimated that using grazing animals in this way on only half of our barren or semi-barren grasslands would remove so much carbon from the air that our atmosphere would be like it was before the industrial age began.
In a natural setting, two forces working together cause hoofed animals to graze the right way: predators and disgust. The presence of predators causes scattered grazing animals to bunch together in a big herd. They eat the grass and, of course, urinate and defecate. After a couple of days of this, they are compelled by their noses to move to greener pastures. So the ground gets thoroughly and regularly "tilled" and "fertilized" and then left alone for a while. And grasses flourish. When the grass has grown tall, it lures the animals back into the area to do it all again. If the animals don't come back, the tall grass rots and smothers any new grass trying to sprout.
Huge parcels of the earth have been turning to desert because we haven't understood how this works. All over the world — from Australia's outback to the Northern Rockies to Zimbabwe — Allan Savory and his teams have proven beyond a shadow of a doubt that when these principles are applied, the deserts disappear. The land turns green. Wildlife returns. Plant diversity proliferates. Birds start singing. It's a beautiful thing. Watch this TED talk to see some photographs of the kind of transformation these principles bring into being. Forty million acres of land are now being grazed this way (called Holistic Planned Grazing).
Think about the consequences. More food can be generated with less water. Instead of draining the Colorado river to grow lettuce in the Arizona desert, for example, livestock could be raised instead. The grass would capture the little bit of rain that falls, and hold it and grow into food for livestock. The meat from this livestock would be healthier to eat than grain-finished beef.
Using grazing animals correctly, the grasses grow deeper roots over time, sequestering more carbon and holding more water, preventing runoff, preventing the loss of topsoil from wind and rain, and protecting the plants and animals from dying off during droughts.
But, you might be thinking, don't all those hoofed animals create methane? And isn't methane a powerful greenhouse gas? Yes to both. However, the alternatives are either bare ground that produces no oxygen or food but produces excess heat...or the grass goes uneaten, so it rots, producing methane. The bacteria can either break down the grass inside a grazing animal or outside it. Either way, you get methane.
But for the reduction of greenhouse gasses, shouldn't we focus on getting alternatives to petroleum fuels? Yes, but not exclusively. The desertification of the land causes almost as much CO2 as burning petroleum. Even if we got rid of all fossil fuels, these lands would continue to turn into deserts until grazing herds return.
In some places, people working with Allan Savory are using domesticated animals mixed in with the wild animals to make the herds bigger (bigger herds work better for grass than smaller herds), and both the domestic and the wild animal herds grow healthy and multiply because the process makes each acre produce more grass. Considerably more. Another good reason to manage the wild animals along with the domesticated ones is because in many places humans have wiped out the predators, and without the predators, grazers stop bunching together and the grass starts dying.
So there it is. Would you like to prevent a big portion of the world from turning into deserts? Would you like to end poverty for millions of people (who are currently relying on this desertifying land for their sustenance)? Would you like to help feed a hungry world with healthy food? Would you like a cooler, more hospitable world? Would you like to solve our growing water shortage problem? Would you like to stop the burning of tropical rainforests to create grasslands for cattle when there are dying grasslands in desperate need of grazing animals? Would you like to stop the erosion of topsoil? Would you like to reverse the buildup of carbon dioxide in the atmosphere? There is something you can do to help.
Share with others about this. And lend your support to the Savory Institute: https://www.facebook.com/savory.global/
This is extraordinarily good news. Desertification of the earth can be reversed, and it can happen very quickly. The land starts to noticeably recover in the first year. To achieve it, we need more animals, not less. Sometimes for the process to work, Savory has discovered he needs to increase the herd size by 400% or more. Grasslands need herds. Humans can make it happen. People are already doing it. The end result is a healthier planet, healthier animals, more food, and healthier humans.
