Allen Savory’s TED talk about a possible method of reversing
desertification was very interesting and at first very promising as well. Allen proposed that in order to reverse
desertification we need to increase, not decrease, the number of livestock on
these lands while using careful management of grazing patterns which he calls
holistic management. The idea is that by using large herds of livestock we can mimic
the natural grazing animals which used to occupy the lands and improve land
quality through a unique symbiotic relationship. According to Savory the
natural action of grazing animals living on and flattening the grasslands
before moving to the next pasture actually increases the fertility of the land
by increasing water retention and space for new grass to grow.
In my opinion I don’t think Savory’s model for reversing
desertification will prove successful on a large scale. While his cattle
management method worked in certain situations I don’t think it is likely to
work in many others. Many of the issues brought up in the review paper by James
McWilliams are valid questions that have been the reasoning for not using an
approach similar to Savory’s holistic management in the past. While Savory’s
use of cattle may have proved successful in certain situations he didn't talk
about the “15 years of frustrating and erratic results” where his holistic
management techniques didn't change the desertification problem occurring. He
also didn't mention that during some of his trials the animals were stressed
and needed additional feed. Even during exceptionally high rainfall levels his
methods “failed to produce the marked improvement in grassland cover claimed
from its application”.
A related paper that I found was trying to understand the
roles of sedentarization (land becoming sedentary), mobility, and rest on
desertification with livestock. http://www.pastoralismjournal.com/content/1/1/19
They found many issues to be at play in desertification
including environmental change and frequent burning with sedentarization being
lower in significance.
While I find myself hopeful that land management of this kind
will work and increase productivity while decreasing desertification I don’t expect
it to. Until I see more examples of holistic management working sustainably I
expect that some of the results presented to us may have had other factors
involved in reversing desertification.
Sources:
Allan Savory: How to Fight Desertification and Reverse Climate Change. TED: Ideas worth Spreading. N.p., n.d. Web. 20 May 2013.
Desertification in the Sahel. Desertification in the Sahel. N.p., n.d. Web. 20 May 2013.
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