Population Correlation Between Species

A google alert for “overpopulation” apprises me of current news on the topic. Sadly, about 95% of the articles deal with humans complaining about animal overpopulation.  Most of the articles have to do with dogs and cats who end up killed or homeless, but other articles frequently lament the number of deer, or other birds and mammals. We have failed to heed the warning of Native Americans many years ago who asked us to consider living in harmony with all other life forms. In Japan, they consider dolphins “pests” because they depend on sealife, fish, for their existence. We humans do not need to eat fish, but we want them, and therefore have pitted our selfish desires against the very existence of a species who must rely on the fish. We kill and eat the dolphins, which due to our abuse and negligence of the oceans are now inundated with mercury, thereby endanger little Japanese schoolchildren who are given the mercury-laden fare in school lunch programs. (For more information, see this review of The Cove).  And while we are fighting the dolphins for the fish, we are taking so much that the oceans may be completely depleted of sea life in the very near future. Who is overpopulated? Who is destroying the ecosphere? It would seem like it isn’t the animals, it is the deadly spread of humanity.

Increasing Human Population and Declining Animal Species and Habitat

In 8000 BC, it is estimated that there were about 5 million humans on planet earth.  By 1000 BC, we had increased our numbers to about 250 million, a 50-fold increase in seven thousand years.  Between 1000 BC and the 18th century, we had increased our human numbers to one billion.  In 1999 we were 6 billion and in only a little more than the last decade, our numbers have added nearly another billion.  The earth is not growing nor are the resources increasing; in fact, with deforestation and overfishing of oceans, they are declining. It is worth noting, too, that when researching wildlife population, the word “control” almost invariably follows the words “wildlife population.”  Perhaps we humans need an attitude adjustment.

Between 1970 and 2003, only 33 years, the terrestrial animal population is estimated to have declined by 31%.  The marine life may well have undergone a much more severe decline, with reports on marine life being even more disturbing.  Various species have already become extinct.  Some scientists are warning that we are undergoing global species extinction at an unprecedented rate. The biggest threat to vertebrate extinction in the United States is destruction of habitat and in China, overexploitation of animal species.

Unless the bulk of humanity can pressure world leaders in the very near future, we will continue to grow like mold on an orange.  And we all know what happens to the orange in that scenario.

Native American Wisdom

Back to those Native Americans – here is a profound Cherokee legend that is relevant:

An old Cherokee is teaching his grandson about life. “A fight is going on inside me,” he said to the boy.

“It is a terrible fight and it is between two wolves. One is evil – he is anger, envy, sorrow, regret, greed, arrogance, self-pity, guilt, resentment, inferiority, lies, false pride, superiority, and ego.” He continued, “The other is good – he is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion, and faith. The same fight is going on inside you – and inside every other person, too.”

The grandson thought about it for a minute and then asked his grandfather, “Which wolf will win?”

The old Cherokee simply replied, “The one you feed.”

It is up to us – which one will we feed?


  1. The Global Population Dynamics Database
  2. WWF Living Planet Index
  3. Relationship Between Animal Population Density and Area
  4. Threats to Vertebrate Species in the United States and China

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4 Responses to “Population Correlation Between Species”

  1. Al says:

    what is the solution you are putting forth exactly?
    Why is population growth occuring? Take a look at that the socio-economic forces that influence this phenomena (particularly in the third world). You article has only looked at the symptoms of a political economic system. The problem is not ‘us’ the problem is the root that creates misery for humans and nonhuman animals. Capitalism is the root of this problem.

  2. veganacious says:

    Hi Al! I was asking only that people consider the consequences of their choices. The global economic system does have a heavy hand in much of these, as I am learning more all the time. But the earth has a carrying capacity, and it is time we started having a bit longer-range view of how we live. I have followed population trends for decades now; unfortunately, much of what was predicted in the 1970s has come to pass. Thanks for your thoughtful response.

  3. katrina says:

    Hmmm…so, capitalism makes people like the Duggars in Arkansas crank out 19, 20 (or whatever they’re up to now) kids? That’s weird, I thought it was them & their fundie-religion fueled, human-centric, megalomaniacal mind-sets that were responsible for that! Silly me!
    Sorry if I sound a tad “fractious” here, but this is a serious, serious topic that needs to be confronted often, no..constantly! Thank you Veganacious! The solutions are these; we, as “evolved” humans, self-correct ourselves & check our own growth, or something else will do it for us. Like the mass starve-off that will happen as the planet’s system & resources fail…oh no, wait; my mistake! Monsanto’s going to take care of that for us with GMO Franken-salmon & crops! Yeah, we’re saved!
    Again, sorry for the “snarkiness”, but I get ever-so annoyed when people refuse to hold people responsible to too many people! People thoughtlessly & irresponsibly creating more people IS the problem.

  4. veganacious says:

    Katrina:
    Thanks for stopping by. I totally understand your frustration. I have been watching populations trends for decades and continue to be amazed at how people applaud those who are endangering all of our survival by failing to limit population growth.

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