« Previous topic | Next topic »  
Topic Locked  
 First unread post  | 5 posts | 
by pleverington on Thu Jul 31, 2014 5:07 pm
pleverington
Forum Contributor
Posts: 5355
Joined: 30 Jun 2004
Found this looking up some other stuff for Joe on that other thread. I kind of knew all this already, but never saw numbers that illustrated things before like this article did....



Misunderstanding abounds about land use in the United States.

By far the greatest impact on the American landscape comes not from urbanization but rather from agriculture. According to the U.S. Department of Agriculture, farming and ranching are responsible for 68 percent of all species endangerment in the United States.

Agriculture is the largest consumer of water, particularly in the West. Most water developments would not exist were it not for the demand created by irrigated agriculture.

If ultimate causes and not proximate causes for species extinction are considered, agricultural impacts would even be higher. Yet scant attention is paid by academicians, environmentalists, recreationists and the general public to agriculture's role in habitat fragmentation, species endangerment and declining water quality.

The ironic aspect of this head-in-the sand approach to land use is that most agriculture is completely unnecessary to feed the nation. The great bulk of agricultural production goes toward forage production used primarily by livestock. A small shift in our diet away from meat could have a tremendous impact on the ground in terms of freeing up lands for restoration and wildlife habitat. It would also reduce the poisoning of our streams and groundwater with pesticides and other residue of modern agricultural practices.

Most of the information in the following summary is available from the USDA Economic Research Service publication "Major Uses of Land in the United States 1997." (To order, call 1-800-9996779). The numbers do not change appreciably from year to year.

Overview of Land Use in the United States-The U.S. has 2.3 billion acres of land. However, 375 million acres are in Alaska and not suitable for agricultural production. The land area of the lower 48 states is approximately 1.9 billion acres.

To put things in perspective, keep in mind that California is 103 million acres, Montana 94 million acres, Oregon 60 million acres and Maine 20 million acres.

Developed Land- Despite all the hand wringing over sprawl and urbanization, only 66 million acres are considered developed lands. This amounts to 3 percent of the land area in the U.S., yet this small land base is home to 75 percent of the population. In general, urban lands are nearly useless for biodiversity preservation. Furthermore, urbanized lands, once converted, usually do not shift to another use.

Rural Residential Land-This category comprises nearly all sprawl and subdivisions along with farmhouses scattered across the country The total acreage for rural residential is 73 million acres. Of this total, 44 million acres are lots of 10 or more acres.
Developed and rural residential make up 139 million acres, or 6.1 percent of total land area in the U.S. This amount of land is not insignificant until you consider that we planted more than 80 million acres of feeder corn and another 75 million acres of soybeans (95 percent of which are consumed by livestock, not tofu eaters) last year alone. These two crops affect more of the land area of the U.S. than all the urbanization, rural residential, highways, railroads, commercial centers, malls, industrial parks and golf courses combined.

Cropland- About 349 million acres in the U.S. are planted for crops. This is the equivalent of about four states the size of Montana. Four crops -- feeder corn (80 million acres), soybeans (75 million acres), alfalfa hay (61 million acres) and wheat (62 million acres) -- make up 80 percent of total crop acreage. All but wheat are primarily used to feed livestock.

The amount of land used to produce all vegetables in the U.S. is less than 3 million acres.

Range and Pasture Land- Some 788 million acres, or 41.4 percent of the U. S. excluding Alaska, are grazed by livestock. This is an area the size of 8.3 states the size of Montana. Grazed lands include rangeland, pasture and cropland pasture. More than 309 million acres of federal, state and other public lands are grazed by domestic livestock. Another 140 million acres are forested lands that are grazed.

Forest Land- Forest lands comprise 747 million acres. Of these lands, some 501 million acres are primarily forest (minus lands used for grazed forest and other special categories).

The USDA report concludes that urbanization and rural residences (subdivisions) "do not threaten the U.S. cropland base or the level of agricultural production." This does not mean sprawl doesn't have impacts where it occurs. But the notion that sprawl is the greatest threat to biodiversity is absolutely false.

Conclusions that place sprawl ahead of agriculture in terms of biodiversity impacts are due to faulty accounting methods and a general bias that favors agriculture as a "good" use of the land.

Furthermore, there are viable means of controlling sprawl. They include land-use planning, zoning, fee purchase and conservation easements.

Despite acreage being paved over, malled over or overbuilt with condos, developed land is generally concentrated in and near cities. The loss of farm or ranch land is insignificant compared to the total acreage available in the U.S.

The real message here is that we can afford to restore hundreds of millions of acres in the U.S. if we simply shift our diets away from meat. Many organizations spend their time fighting sprawl and championing agriculture as a benign use of the land. If a similar amount of effort were directed toward reducing agricultural production, we would produce far greater protection and restoration for declining species, endangered ecosystems and ecological processes.

When critics suggest that we don't have the money to buy land for wildlands restoration, they are forgetting agricultural subsidies, which amount to hundreds of billions of dollars. For what we spend to prop up marginal agricultural producers, we could easily buy most of the private farm and ranch land in the country This would be a far more effective way to contain sprawl, restore wildlands, bring back endangered species, clean up water, slow the spread of exotic species and reduce soil erosion.

George Wuerthner is a Western Watersheds Project advisory board member who lives in Eugene, Oregon.







Paul
Paul Leverington
"A great image is one that is created, not one that is made"


Last edited by pleverington on Wed Sep 10, 2014 10:03 am, edited 1 time in total.
Topic Locked  

by pleverington on Thu Jul 31, 2014 5:33 pm
pleverington
Forum Contributor
Posts: 5355
Joined: 30 Jun 2004
And just to follow up a little where my  first post left off:



Habitat Loss
Image
Habitat loss—due to destruction, fragmentation or degradation of habitat—is the primary threat to the survival of wildlife in the United States.
When an ecosystem has been dramatically changed by human activities—such as agriculture, oil and gas exploration, commercial development or water diversion—it may no longer be able to provide the food, water, cover, and places to raise young. Every day there are fewer places left that wildlife can call home.
 
There are three major kinds of habitat loss:
  • Habitat destruction: A bulldozer pushing down trees is the iconic image of habitat destruction. Other ways that people are directly destroying habitat, include filling in wetlands, dredging rivers, mowing fields, and cutting down trees.
  • Habitat fragmentation: Much of the remaining terrestrial wildlife habitat in the U.S. has been cut up into fragments by roads and development. Aquatic species’ habitat has been fragmented by dams and water diversions. These fragments of habitat may not be large or connected enough to support species that need a large territory in which to find mates and food. The loss and fragmentation of habitat make it difficult for migratory species to find places to rest and feed along their migration routes.
  • Habitat degradation: Pollutioninvasive species and disruption of ecosystem processes (such as changing the intensity of fires in an ecosystem) are some of the ways habitats can become so degraded that they no longer support native wildlife.
What are the main drivers of habitat loss in the U.S.?
 
  • Agriculture: Much of the habitat loss from agriculture was done long ago when settlers converted forests and prairies to cropland. Today, there is increasing pressure to redevelop conservation lands for high-priced food and biofuel crops.
  • Land conversion for development: The conversion of lands that once provided wildlife habitat to housing developments, roads, office parks, strip malls, parking lots and industrial sites continues, even during the current economic crisis.
  • Water development: Dams and other water diversions siphon off and disconnect waters, changing hydrology and water chemistry (when nutrients are not able to flow downstream). During the dry season, the Colorado River has little to no water in it by the time it reaches the Sea of Cortez.
     
    Image
  • Pollution: Freshwater wildlife are most impacted by pollution. Pollutants such as untreated sewage, mining waste, acid rain, fertilizers and pesticides concentrate in rivers, lakes and wetlands and eventually end up in estuaries and the food web.
  • Global warmingGlobal warming is the emerging driver of habitat loss. Wildlife that need the cool temperatures of high elevations, such as the American pika, may soon run out of habitat. Coastal wildlife may find their habitat underwater as sea levels rise.

  If we believe that there is plenty of land for wildlife then what the heck are we talking about as far as "plenty"? Not compared to what was once here say 500 years ago...maybe a lot compared to what will be left in 500 years from now..


Paul
Paul Leverington
"A great image is one that is created, not one that is made"
Topic Locked  

by bradmangas on Thu Jul 31, 2014 6:07 pm
User avatar
bradmangas
Forum Contributor
Posts: 278
Joined: 15 Feb 2013
There seems to be little doubt the spiraling circle civilization is going down. Change for change sake is not and never has been good. 

I enjoy a vast variety of books and audio books. Last year I had the book Ishmael by Daniel Quinn recommended to me. It seemed a little off the path of what I typical choose to read but purchased it and began reading. It immediately captured my attention simply for the bizarre nature of the story that began unfolding. Needless to say there was no way I was not going to finish it. 

I am not trying to recommend or discourage anyone read it but, if you do with an open mind it has the ability to change the way you look at and interact with life.

From Wikipedia

Ishmael at Amazon or Audible
Topic Locked  

by pleverington on Thu Jul 31, 2014 10:49 pm
pleverington
Forum Contributor
Posts: 5355
Joined: 30 Jun 2004
An excellent contribution Brad.....Manny applause for you....

Paul
Paul Leverington
"A great image is one that is created, not one that is made"
Topic Locked  

by Primus on Mon Aug 25, 2014 6:36 am
Primus
Lifetime Member
Posts: 905
Joined: 12 Oct 2012
Location: New York
Member #:02003
Brad, thank you.

I ordered the book from Amazon and finished reading it a few days ago. It is indeed a captivating story and I believe a must read for everyone interested in the future of our beautiful planet. However, I am hopelessly in the 'taker' camp and cannot see a way out of it.
Topic Locked  

Display posts from previous:  Sort by:  
5 posts | 
  

Powered by phpBB® Forum Software © phpBB Group