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EarthTalk®
From the Editors of E – The Environmental Magazine
Dear EarthTalk: What on Earth is “plant blindness?” – Betsy Carlucci. New York, NY
Botanists James Wandersee and Elizabeth Schussler coined the term “plant blindness” in 1998 to describe “the inability to see or notice the plants in one’s own environment, leading to the inability to recognize the importance of plants in the biosphere and in human affairs.” An additional aspect of plant blindness is the “inability to appreciate the aesthetic and unique biological features” of plants and “the misguided, anthropocentric ranking of plants as inferior to animals, leading to the erroneous conclusion that they are unworthy of human consideration.”
Wandersee and Schussler coined the term after years of discussion back and forth about a fundamental problem: if we don’t pay attention to plants and their role in supporting the rest of the lives on the planet including our own, how will we ever agree on the need to conserve them, much less support plant science research and education? Also, letting plants die out poses an existential threat to humanity and the rest of life on the Earth. Researchers believe one in eight plant species around the globe are threatened with extinction as our (plant-dependent) human population continues to swell.
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What causes plant blindness? According to Wandersee and Schussler, social and educational biases are definitely a big factor, with so-called “zoo-chauvinistic” educators at all levels tending to use animal (instead of plant) examples to teach basic biological concepts in the classroom, lab or field.
Of course, there is likely more to it than educational biases. Wandersee and Schussler argue in an article in Plant Science Bulletin that another major contributor to plant blindness is the nature of the human visual information-processing system, in that our brains can’t possibly process everything around us immediately just because our eyes are open, and we are hard-wired to prioritize certain visual cues (like movement that may signal an animal threat) over others.
One study they cite concludes that over the course of a single second, the eyes generate more than 10 million bits of data for visual processing, but the brain can only extract 40 bits during this timeframe and can only fully process 16 of them that reach our conscious attention. Another study found that participants more accurately detected images of animals than plants in an “attentional blink” study designed to test people’s ability to notice one or two rapid-fire images. And yet another study found that children recognize that animals are living creatures before they can tell plants are also alive, and that they remember images of animals much better than images of plants.
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To Wandersee and Schussler, devoting more of our educational resources to teaching kids and adults about plants and their role in supporting life is the key to overcoming plant blindness. Indeed, seeing the plants all around us could be key to our survival on the planet, so it behooves each and every one of us to learn more about the environment around us and start appreciating not just the other fauna we share life with but also the flora that helps make it all possible.
CONTACTS: Plant Blindness, academic.oup.com/bioscience/article/53/10/926/254897; “Toward a Theory of Plant Blindness,” www.botany.org/bsa/psb/2001/psb47-1.pdf; “Plant blindness and the implications for plant conservation,” conbio.onlinelibrary.wiley.com/doi/pdf/10.1111/cobi.12738.
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Oddly, I do see plants. Worse, I feel distress over our fixation to plant grass all over any flattened area, rather than a balanced group of native plants and even wild vegetables and nitrogen fixing legumes.
Where many see an overgrown field as an eyesore, I see delightful rabbit runs and deer paths to occasional clearings. Well, that and a boundless source of ticks, but that’s why I have body hair, to alert me that I’m still on the dinner menu. I just dislodge them before they’re ready to feed and continue on ny way, as they’re food for something in the area that I’m only a guest in.
This is the most gentle and generous continent or earth, where poisonous plants were rare and only a vanishing few animals could actually harm us. One cannot say that of any other continent, even the terraformed landp of Europe.
A continent where many see jimson weed as a poisonous plant and I see a barrier crop and treatment for insecticide overdose in an emergency.
Here, Here my friend.