Comment Re:Answer isn't less cattle, but more. (Score 3, Informative) 94
Pseudoscience alert! From KCET's Chris Clarke
http://www.kcet.org/updaily/socal_focus/commentary/east-ca/learn-how-to-hate-the-desert-with-ted.html
Savory's talk is full of red flags, and to document and rebut each one would take more time than is really wise to spend on the talk. But three stand out as especially egregious.
The notion that bare, unvegetated soil in the American desert is an evil to be avoided flies in the face of everything we know about desert soil science. Bare soil in the desert includes desert pavement, a self-regulating system that controls air pollution. It includes alkaline crusts and dry lake beds, both homes to unique assemblages of organisms. Seemingly bare soil may hold seed banks of diverse assemblages of annual plants, some of which are limited enough in extent that covering the soil with grassland -- even if you could do so -- would push them toward extinction. And sparsely vegetated soil is crucial for the survival of many animal species, including desert tortoises, fringe-toed and horned lizards, and other animals that actually belong in the desert far more than do cattle.
The idea that grasses must be eaten by livestock to perform a valuable ecological function is similarly absurd. Grasses provide food, shelter, and even construction material for hundreds of desert animals ranging from jackrabbits to tiny insects, each of which is eaten in turn by other animals. Send in a wave of cattle to crop those grasses and we've diverted that ecological productivity to our own ends, depriving the local wildlife of food and habitat. Bunchgrasses can live for centuries if untrampled, providing year after year of ecological benefit to hundreds of generations of wildlife. Savory, like many grazing advocates, seems to regard such ancient bunchgrasses as decadent: In Lynn Jacobs' 1991 book "Waste of The West," Jacobs says "Savory claims like most ranchers that old growth range plants are 'useless' and 'decadent.'" But, adds Jacobs, "like tree snags in forests, standing dead range plant material is itself an important, natural environmental component."
Lastly, Savory's contention that the "algal crust" he shows developing on arid land soil is "the cancer of desertification" is unscientific in the extreme. He makes the statement at 4:00 into the TED video, but it's one he's made for years. Lynn Jacobs wrote in 1991 that students of (what was then being called) HRM learned from Savory that "Cryptogams are a prime indicator of a deteriorating environment." (To underscore his postulation, commonly Savory scuffs apart the cryptogamic layer while walking on Rangeland.)
This is, of course, completely false. Cryptobiotic soil crusts are a crucial underpinning of old-growth desert habitats across North America, and indeed throughout much of the world.
Savory has been around for a very long time preaching the same fallacious grazing gospel, and his name raises curled lips among land management scientists the way Velikovsky's name raises the ire of astronomers. He's merely the latest practitioner of a tradition a couple centuries long of land management mythologies based on wishful thinking that don't turn out to work. A century ago land speculation boosters in the American West claimed that "rain follows the plow"; Savory has merely updated that to "grass follows the cow."