Hello everyone,

While I'm more than happy to agree that the amount that ecologists travel (relative to the average earth resident) is an outrageous disaster, and I'm happy to agree that curbing travel has a far larger impact on one's ecological footprint than curbing the consumption of animal products, the statement that humans cannot survive on a plant based diet is clearly false. Humans do not require any animal-derived amino acids (although they are certainly tasty!). If it is not proof enough that there are entire cultures (with reasonable life-spans) that eat strictly vegetarian diets, just survey the academic literature on vegetarian (vs non-vegetarian) health. Vegetarian diets do require humans to consume foods differently than non-vegetarians but they are not impossible, nor unhealthy. Unfortunately, most people switch to a vegan diet with little education in nutrition and end up rapidly depleting essential nutrients that come from food the normal North American doesn't use regularly.

Here's an abstract of a the first comparative study of vegetarians and non-vegetarians I pulled up on Web of science. It looks as if Buddhist vegetarian nuns are just as healthy (if not more) as non-vegetarian omnivores.

Body composition and nutrient intake of Buddhist vegetarians (2009)
Lee, Yujin, Krawinkel, Michael.
ASIA PACIFIC JOURNAL OF CLINICAL NUTRITION    18(2): 265-271
Abstract: We described the body composition and nutrient intake of Buddhist vegetarians and compared the data with that of omnivores in South Korea. Vegetarian subjects were 54 Buddhist nuns, who adhered to a vegetarian diet in accordance with Buddhist teachings. We compared these finding with a group of 31 omnivore Catholic nuns who shared a similar lifestyle but different dietary pattern than those of the Buddhist nuns. All subjects completed the estimated three-day dietary record. Body composition was determined by a segmental multi-frequency- bioelectrical impedance analysis method. No height difference between the dietary groups existed but the vegetarians had a significantly higher body weight, fat free mass, body fat and body mass index (BMI, kg/m(2)) than the omnivores. The median BMI of both vegetarians and omnivores fell in the normal range (22.6 vs. 20.7 kg/m(2)). In vegetarians, body fat was inversely correlated with the duration of vegetarianism (p for trend = 0.043). The long duration group of the vegetarians had lower body fat than the short duration group (12.1 vs. 15.0 kg, p = 0.032). The status of the nutrient intake of Korean Buddhist vegetarians was comparable to that of omnivores, and the intake of some nutrients in vegetarians was more favorable than in the omnivores.

And the most highly cited, manipulative study I could find, revealed that a vegetarian diet (including dairy products) has beneficial consequences for blood pressure.

A clinical trial of the effects of dietary patterns on blood pressure (1997) Appel LJ, Moore TJ, Obarzanek E, Vollmer WM, Svetkey LP, Sacks FM, Bray GA, Vogt TM, Cutler JA, Windhauser MM, Lin PH, Karanja N
NEW ENGLAND JOURNAL OF MEDICINE  336 (16): 1117-1124

Abstract: Background It is known that obesity, sodium intake, and alcohol consumption influence blood pressure. In this clinical trial, Dietary Approaches to Stop Hypertension, we assessed the effects of dietary patterns on blood pressure. Methods We enrolled 459 adults with systolic blood pressures of less than 160 mm Hg and diastolic blood pressures of 80 to 95 mm Hg. For three weeks, the subjects were fed a control diet that was low in fruits, vegetables, and dairy products, with a fat content typical of the average diet in the United States. They were then randomly assigned to receive for eight weeks the control diet, a diet rich in fruits and vegetables, or a ''combination'' diet rich in fruits, vegetables, and low-fat dairy products and with reduced saturated and total fat. Sodium intake and body weight were maintained at constant levels.

Results At base line, the mean (+/-SD) systolic and diastolic blood pressures were 131.3+/-10.8 mm Hg and 84.+/-4.7 mm Hg, respectively. The combination diet reduced systolic and diastolic blood pressure by 5.5 and 3.0 mm Hg more, respectively, than the control diet (P<0.001 for each); the fruits-and-vegetables diet reduced systolic blood pressure by 2.8 mm Hg more (P<0.001) and diastolic blood pressure by 1.1 mm Hg more (P=0.07) than the control diet. Among the 133 subjects with hypertension (systolic pressure, greater than or equal to 140 mm Hg; diastolic pressure, greater than or equal to 90 mm Hg; or both), the combination diet reduced systolic and diastolic blood pressure by 11.4 and 5.5 mm Hg more, respectively, than the control diet (P<0.001 for each); among the 326 subjects without hypertension, the corresponding reductions were 3.5 mm Hg (P<0.001) and 2.1 mm Hg (P=0.003).

Conclusions A diet rich in fruits, vegetables, and low-fat dairy foods and with reduced saturated and total fat can substantially lower blood pressure. This diet offers an additional nutritional approach to preventing and treating hypertension. (C) 1997, Massachusetts Medical Society.


On Sep 8, 2009, at 10:50 PM, malcolm McCallum wrote:

I tend to believe that any absolute answer that is declared an end all answer is probably not the answer. For example, I'm not convinced that everyone
jumping into a vegetarian diet is going to suddenly or even slowly
save the world.
Especially, considering that some of these stats are based on unrealistic
estimates.

For example, suggesting that x acres of corn would feed x number of cows and that would feed x number of people whereas the x acres of corn would feed way
more people is flawed.  Humans cannot survive on a corn diet.  Even if
we expanded
this to grains and soybeans, humans cannot survive on a corn-soybean diet.
Why?  because vegetables in general are low in two or three essential
amino acids
that humans must get in their diet. those amino acids are produced by animals
and so you must ultimately get them from animals or artificially
produced products.

Furthermore, even if the plant has x amount of lysine for example, the
amount in
the plant is not completely biologically available to the human
because we simply
do not have the enzymes for breaking these products down.

Also, outside of feedlots where high-concentrate diets are fed, if you look at
grass fed cattle/sheep/goats you are going to find that these animals
are raised
on lands that are not very suitable for food crop production AND that much of
what they are fed is not human food but rather grasses.  However, most
beef is fed out in feedlots and relatively little is raised on grass.
Sheep and
goats, however, are virtually entirely fed using areas that would not be used
for any kind of crop farming.

Now, growing row crops such as corn and soybeans is not a one-to-one conversion
to growing horticultural food crops.  Horticultural food crops require
more intensive
care in order for them to have shelf life and for other technical
reasons.  The seeds
are planted further apart, the rows further apart and the necessary
irrigation and
pest control much more extreme than row crops. Other crops such as fruits waste tons of land in comparison. It takes a good 5 years before a fruit tree reaches maturity (semi dwarf) and closer to two years for a dwarf. Again,
high use of pesticides is the norm.  And what about nuts?  Aren't
these one of the
wonder foods that will supplant meat in our diet??? Well, a pecan tree takes a good 15-30 years to reach maturity depending on the hybrid!!!! now that tree will produce for a good long time, but do you really think a pecan orchard is
all that productive?

Overall, we would do well to lower our meat intake for both environmental and
health reasons.  However, if we wanted to really do this right, we
would all buy
a goat for milk, have it eat our grass and weeds for milk, then eat the kids.

In fact, goat meat is much more in line with human nutrition than lamb and lamb
more in line than beef or pork.

My wife and I have our own flock of chickens we use for eggs. We raise a couple of pigs each year, and do raise a few meat goats each year. I still like to eat a nice juicy steak once in a while. We raise most of our vegetables from the garden, although the weather in East Texas has been anti- garden for
three years strait...luckily, we put away a lot three years ago.

I don't know if what I am doing is making any great contribution to the earth's environment. I certainly can't say that I'm setting some great example, as who the heck sees what I'm doing anyway? However, I have always had this idea that pseudohomesteading (my term I invented comparing what we do to the
movement from the 1970s) would be fun.  So, we are doing it because we
like to live this
way.  If it wasn't for a pile of student loans and medical bills, I
might just go off the
grid and give the world the proverbial phalange, except for the
occassional journal
article I publish, letter to the editor, and maybe even a listserv
post if I kept the
internet for contact with the real world.  I also enjoy watching TV,
so it can't go
either. And then there is central air and heat. Oh, and running water. Radio,
music, damn....I'm back on the grid and almost hit yupeeville :(

If everyone pics ONE CAUSE and stuck with it, the world would be a better place.
If your cause is recycling, and you do it religiously, and a bunch of
other people also do it,
it will have an impact.

But the real problem is that there are a lot of people who do
absolutely nothing, have
absolutely no interest in the health of the environment, and a mess of
people who are
actually at war with environmental causes. If even most people tried
to do something,
I think you would see an environmental revolution. Unfortunately, most people
are consumed by other things and even if they are concerned about the
environment,
they really are not engaged in anything of environmental importance.

How's that for a completely bleak outlook.
Ask me tomorrow and I may have a more positive slant!


On Tue, Sep 8, 2009 at 9:50 PM, Kevin McCluney<[email protected]> wrote:
I recently attended the 2009 annual meeting of the Ecological Society of America (ESA). The theme of this year’s meeting was sustainability. There were many great talks on this subject and a few truly pessimistic ones. One speaker proposed that human beings are, by our very nature, destined to consume and reproduce as much as possible, and despite our best efforts, this will lead to our own demise. During the same talk the speaker also asked, “who is responsible?” He answered his question by saying that we at this conference are just as much a part of the problem as anyone else.

Is this true? I know I myself have taken many steps to lower my footprint
and many other ecologists have as well.

For instance, at last year’s ESA meeting in Milwaukee there was an
interesting occurrence at local restaurants.  The first night of the
conference I had a really good veggie burger at one restaurant. I went back later in the week for another. The waitress apologized… they were all out. She went on to explain that the manager had heard our conference was coming to town, so bought extra ahead of time, but ran out of those quickly anyway. The manager then went to the local grocery store and bought more. But alas, by the time I returned, they had run out of those as well. Further, when I dine with friends at ESA meetings, I often find that more than half the
table orders vegetarian entrees.

Why does eating vegetarian matter so much? Modern, industrialized livestock production is one of the more environmentally destructive human endeavors. It contributes roughly one fifth of all our greenhouse gas emissions, more than all cars, and these gases are major contributors to the rapid climate change we’re experiencing. Livestock production also may, in certain cases, be leading to deforestation and destruction of important ecosystems, as well as to pollution of rivers, lakes, and even oceans. In addition, we all know that basic ecological principles hold that it takes less resources to raise plant based food sources than meat based, since energy is lost as you move up the food chain. Thus we can feed more people and use fewer resources on a plant-based diet. All this caused the chairman of the Intergovernmental Panel on Climate Change recently to proclaim that the best thing a person could do to reduce their impact on climate change was to eat a more plant-
based diet.

My wife and I haven’t stopped at eating low on the food chain. We’ve also joined community supported agriculture, where we buy a share of produce from a local farm. The farmer gets upfront economic security and we get very affordable, local, fresh organic produce. We pay just $18 per week for a large bag of food. At this price we can afford to supplement our diet with
additional organic items from the grocery store.

We’ve also taken a variety of other steps, from riding my bike to work, to offsetting car and air travel through renewable energy from an independently certified company, to buying 100% of our electricity from renewable sources
through our local utility for as little as $15 per month.

While we may not be reaching the small ecological footprint of those in many third world countries, we’ve done our best to come in line with our planet’s
limits while maintaining a decent quality of life.

So, are ecologists just as much a part of the problem as everyone else? Are all ecologists the same? What are the variety of lifestyle choices made by
ecologists?  Not only would the answers to these questions provide a
response to the ESA presenter, but I think the answer would be interesting to a wide audience. I propose that ESA conduct a poll of members, asking questions about lifestyle choices and demographics, comparing ours to that of the general public. If we are not different, this would be a bit of a
wake-up call.  However, if we are different, then perhaps some of our
lifestyle choices would be informative to understanding how to achieve a
more sustainable society.

If there is one thing I learned from a cultural anthropology course I once took, it was that there isn’t just one right way to live. Human cultures throughout the world are very diverse. But, from the inside of one culture it is often very hard to see other ways to live. Let us not be trapped in our culture, but seek a better understanding of all the ways of living, so
that we might find a more sustainable path.

--
Kevin E. McCluney
Graduate Student
School of Life Sciences
Arizona State University
Tempe, AZ 85287-4601




--
Malcolm L. McCallum
Associate Professor of Biology
Managing Editor,
Herpetological Conservation and Biology
Texas A&M University-Texarkana
Fall Teaching Schedule:
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1880's: "There's lots of good fish in the sea"  W.S. Gilbert
1990's:  Many fish stocks depleted due to overfishing, habitat loss,
           and pollution.
2000:  Marine reserves, ecosystem restoration, and pollution reduction
         MAY help restore populations.
2022: Soylent Green is People!

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