Nature Essential for the Brain, Scientists Report

Boston Globe - January 2,2009
by Jonah Lehrer

The city has always been an engine of intellectual life, from the 18th-century coffeehouses of London, where citizens gathered to discuss chemistry and radical politics, to the Left Bank bars of modern Paris, where Pablo Picasso held forth on modern art. Without the metropolis, we might not have had the great art of Shakespeare or James Joyce; even Einstein was inspired by commuter trains.

And yet, city life isn't easy. The same London cafes that stimulated Ben Franklin also helped spread cholera; Picasso eventually bought an estate in quiet Provence. While the modern city might be a haven for playwrights, poets, and physicists, it's also a deeply unnatural and overwhelming place.

Now scientists have begun to examine how the city affects the brain, and the results are chastening. Just being in an urban environment, they have found, impairs our basic mental processes. After spending a few minutes on a crowded city street, the brain is less able to hold things in memory, and suffers from reduced self-control. While it's long been recognized that city life is exhausting -- that's why Picasso left Paris -- this new research suggests that cities actually dull our thinking, sometimes dramatically so.

"The mind is a limited machine,"says Marc Berman, a psychologist at the University of Michigan and lead author of a new study that measured the cognitive deficits caused by a short urban walk. "And we're beginning to understand the different ways that a city can exceed those limitations."

One of the main forces at work is a stark lack of nature, which is surprisingly beneficial for the brain. Studies have demonstrated, for instance, that hospital patients recover more quickly when they can see trees from their windows, and that women living in public housing are better able to focus when their apartment overlooks a grassy courtyard. Even these fleeting glimpses of nature improve brain performance, it seems, because they provide a mental break from the urban roil.

This research arrives just as humans cross an important milestone: For the first time in history, the majority of people reside in cities. For a species that evolved to live in small, primate tribes on the African savannah, such a migration marks a dramatic shift. Instead of inhabiting wide-open spaces, we're crowded into concrete jungles, surrounded by taxis, traffic, and millions of strangers. In recent years, it's become clear that such unnatural surroundings have important implications for our mental and physical health, and can powerfully alter how we think.

This research is also leading some scientists to dabble in urban design, as they look for ways to make the metropolis less damaging to the brain. The good news is that even slight alterations, such as planting more trees in the inner city or creating urban parks with a greater variety of plants, can significantly reduce the negative side effects of city life. The mind needs nature, and even a little bit can be a big help.

Consider everything your brain has to keep track of as you walk down a busy thoroughfare like Newbury Street. There are the crowded sidewalks full of distracted pedestrians who have to be avoided; the hazardous crosswalks that require the brain to monitor the flow of traffic. (The brain is a wary machine, always looking out for potential threats.) There's the confusing urban grid, which forces people to think continually about where they're going and how to get there.

The reason such seemingly trivial mental tasks leave us depleted is that they exploit one of the crucial weak spots of the brain. A city is so overstuffed with stimuli that we need to constantly redirect our attention so that we aren't distracted by irrelevant things, like a flashing neon sign or the cellphone conversation of a nearby passenger on the bus. This sort of controlled perception -- we are telling the mind what to pay attention to -- takes energy and effort. The mind is like a powerful supercomputer, but the act of paying attention consumes much of its processing power.

Natural settings, in contrast, don't require the same amount of cognitive effort. This idea is known as attention restoration theory, or ART, and it was first developed by Stephen Kaplan, a psychologist at the University of Michigan. While it's long been known that human attention is a scarce resource -- focusing in the morning makes it harder to focus in the afternoon -- Kaplan hypothesized that immersion in nature might have a restorative effect.

Imagine a walk around Walden Pond, in Concord. The woods surrounding the pond are filled with pitch pine and hickory trees. Chickadees and red-tailed hawks nest in the branches; squirrels and rabbits skirmish in the berry bushes. Natural settings are full of objects that automatically capture our attention, yet without triggering a negative emotional response -- unlike, say, a backfiring car. The mental machinery that directs attention can relax deeply, replenishing itself.

"It's not an accident that Central Park is in the middle of Manhattan," says Berman. "They needed to put a park there."

In a study published last month, Berman outfitted undergraduates at the University of Michigan with GPS receivers. Some of the students took a stroll in an arboretum, while others walked around the busy streets of downtown Ann Arbor.

The subjects were then run through a battery of psychological tests. People who had walked through the city were in a worse mood and scored significantly lower on a test of attention and working memory, which involved repeating a series of numbers backwards. In fact, just glancing at a photograph of urban scenes led to measurable impairments, at least when compared with pictures of nature.

"We see the picture of the busy street, and we automatically imagine what it's like to be there," says Berman. "And that's when your ability to pay attention starts to suffer."

This also helps explain why, according to several studies, children with attention-deficit disorder have fewer symptoms in natural settings. When surrounded by trees and animals, they are less likely to have behavioral problems and are better able to focus on a particular task.

Studies have found that even a relatively paltry patch of nature can confer benefits. In the late 1990s, Frances Kuo, director of the Landscape and Human Health Laboratory at the University of Illinois, began interviewing female residents in the Robert Taylor Homes, a massive housing project on the South Side of Chicago.

Kuo and her colleagues compared women randomly assigned to various apartments. Some had a view of nothing but concrete sprawl, the blacktop of parking lots and basketball courts. Others looked out on grassy courtyards filled with trees and flowerbeds. Kuo then measured the two groups on a variety of tasks, from basic tests of attention to surveys that looked at how the women were handling major life challenges. She found that living in an apartment with a view of greenery led to significant improvements in every category.

"We've constructed a world that's always drawing down from the same mental account," Kuo says. "And then we're surprised when [after spending time in the city] we can't focus at home."

But the density of city life doesn't just make it harder to focus: It also interferes with our self-control. In that stroll down Newbury, the brain is also assaulted with temptations -- caramel lattes, iPods, discounted cashmere sweaters, and high-heeled shoes. Resisting these temptations requires us to flex the prefrontal cortex, a nub of brain just behind the eyes. Unfortunately, this is the same brain area that's responsible for directed attention, which means that it's already been depleted from walking around the city. As a result, it's less able to exert self-control, which means we're more likely to splurge on the latte and those shoes we don't really need. While the human brain possesses incredible computational powers, it's surprisingly easy to short-circuit: all it takes is a hectic city street.

"I think cities reveal how fragile some of our 'higher' mental functions actually are," Kuo says. "We take these talents for granted, but they really need to be protected."

Related research has demonstrated that increased "cognitive load" -- like the mental demands of being in a city -- makes people more likely to choose chocolate cake instead of fruit salad, or indulge in a unhealthy snack. This is the one-two punch of city life: It subverts our ability to resist temptation even as it surrounds us with it, from fast-food outlets to fancy clothing stores. The end result is too many calories and too much credit card debt.

City life can also lead to loss of emotional control. Kuo and her colleagues found less domestic violence in the apartments with views of greenery. These data build on earlier work that demonstrated how aspects of the urban environment, such as crowding and unpredictable noise, can also lead to increased levels of aggression. A tired brain, run down by the stimuli of city life, is more likely to lose its temper.

Long before scientists warned about depleted prefrontal cortices, philosophers and landscape architects were warning about the effects of the undiluted city, and looking for ways to integrate nature into modern life. Ralph Waldo Emerson advised people to "adopt the pace of nature," while the landscape architect Frederick Law Olmsted sought to create vibrant urban parks, such as Central Park in New York and the Emerald Necklace in Boston, that allowed the masses to escape the maelstrom of urban life.

Although Olmsted took pains to design parks with a variety of habitats and botanical settings, most urban greenspaces are much less diverse. This is due in part to the "savannah hypothesis," which argues that people prefer wide-open landscapes that resemble the African landscape in which we evolved. Over time, this hypothesis has led to a proliferation of expansive civic lawns, punctuated by a few trees and playing fields.

However, these savannah-like parks are actually the least beneficial for the brain. In a recent paper, Richard Fuller, an ecologist at the University of Queensland, demonstrated that the psychological benefits of green space are closely linked to the diversity of its plant life. When a city park has a larger variety of trees, subjects that spend time in the park score higher on various measures of psychological well-being, at least when compared with less biodiverse parks.

"We worry a lot about the effects of urbanization on other species," Fuller says. "But we're also affected by it. That's why it's so important to invest in the spaces that provide us with some relief."

When a park is properly designed, it can improve the function of the brain within minutes. As the Berman study demonstrates, just looking at a natural scene can lead to higher scores on tests of attention and memory. While people have searched high and low for ways to improve cognitive performance, from doping themselves with Red Bull to redesigning the layout of offices, it appears that few of these treatments are as effective as simply taking a walk in a natural place.

Given the myriad mental problems that are exacerbated by city life, from an inability to pay attention to a lack of self-control, the question remains: Why do cities continue to grow? And why, even in the electronic age, do they endure as wellsprings of intellectual life?

Recent research by scientists at the Santa Fe Institute used a set of complex mathematical algorithms to demonstrate that the very same urban features that trigger lapses in attention and memory -- the crowded streets, the crushing density of people -- also correlate with measures of innovation, as strangers interact with one another in unpredictable ways. It is the "concentration of social interactions" that is largely responsible for urban creativity, according to the scientists. The density of 18th-century London may have triggered outbreaks of disease, but it also led to intellectual breakthroughs, just as the density of Cambridge -- one of the densest cities in America -- contributes to its success as a creative center. One corollary of this research is that less dense urban areas, like Phoenix, may, over time, generate less innovation.

The key, then, is to find ways to mitigate the psychological damage of the metropolis while still preserving its unique benefits. Kuo, for instance, describes herself as "not a nature person," but has learned to seek out more natural settings: The woods have become a kind of medicine. As a result, she's better able to cope with the stresses of city life, while still enjoying its many pleasures and benefits. Because there always comes a time, as Lou Reed once sang, when a person wants to say: "I'm sick of the trees/take me to the city."

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Planting Perennials in the Fall

I have planted small plugs up through Thanksgiving and we are on the border of Zone 3 and 4 here in NE The root system is the most important part of the plant any time that you transplant. The fall can be deceiving and people who purchase plants this time of the year are sometimes disappointed that the tops are shaggy or sometimes non-existent. Don't get discouraged. Take time to observe the root system. Select plants that have healthy roots. If the root system is dark and slimy, it is not a good plant and might even be dead. Choose plants or plugs with turgid, proper color and are not root bound. Don't forget...plants have different colors of roots so become familiar with the colors. Also the density of the root system varies with different plants. For instance: Prairie Dropseed has a fine reddish colored root system while Cardinal flower has a very white root system that is very dense. Don't compare one species to the other. Only compare same species with each other when checking the root system. So purchase your plants now and get the jump on next year as your plants will spring forth and be way ahead of those later plantings in the spring or summer.

Howard Bright - Ion Exchange Inc.


This autumn, consider planting perennials. There is no reason to wait for spring - fall is a perfect time for planting!
Editor's note: This article was originally published September 8, 2008
Reprinted from Dave's Garden

In the spring, we are deluged with catalogs stuffed with pictures of beautifully perfect flowers and plants. "Buy me! Plant me!" they cry. The nurseries fill with plants, live and in person, all needing good homes. "Resist," I say. "The time is not yet at hand!" Planting perennials in the fall is a kinder, gentler way to plant.

Perennials planted in the spring have a tough row to hoe. They must:

* Develop an entirely new root system

* Adjust to life outside the greenhouse or nursery

* Produce a crop of flowers (or lovely foliage, or whatever it is you're expecting of them)

* Risk being planted too soon, before they have "hardened off" sufficiently

* Risk being planted too late, in some of the most taxing conditions for a plant: the heat of summer

Many of the wiser mail order companies won't even ship during the hot days of June, July and August. I recommend the more nurturing method of planting perennials in the fall. If you plant your plants at least six weeks before the first freeze is likely to occur, you'll give them a chance to conserve their foliage and flower development in favor of root growth. If the roots are there, the plant will be there.

One of the strongest arguments in favor of fall planting is a good one for knuckle-heads like me: by fall, you know approximately what the plant looks like, how tall and maybe even what color it will be.

Platycodon very busy blooming - do not disturb!

This lovely balloon flower on the right (Platycodon) usually flowers during the heat of July. Don't plant it now! It's hard enough on the poor thing that it has to flower. Don't make it suffer transplant shock as well!

This next specimen, below, may look unhealthy, but it's the same type of plant, Platycodon, at the next stage of its life cycle: setting seed and hunkering down for the winter. If you see a plant like this for sale, especially if it's marked down, by all means, buy it and plant it! Make the hole nice and deep, back fill with amended soil and consider adding fertilizer or moisture crystals if appropriate for the plant and your climate and soil. Don't forget to water thoroughly after planting.

Platycodons finished blooming. They're ready to be planted.

My husband bought around 20 balloon flowers just like the one on the left for $2 each one fall and planted them as a border to a path. I may have found Dave's Garden in my effort to discover just what, exactly, he was getting us into! But sure enough, the next July, they looked something like this:

Now it's almost a tradition. In the fall, we shop for bargain plants, and then plant them before winter. One year the snow came earlier than we expected, and the bed he was working on wasn't quite finished. So that year, he actually planted perennials in half an inch of snow! What you Southerners may not realize is that snow only means the air up high is cold, not the earth. The new bed didn't freeze for another couple of months, giving plenty of time for the heuchera, viola, columbine, geum and potentilla to get established. They were all lovely the following spring, and most of them are still fighting it out.

So procrastinators, take heart. The best time to plant many flowering perennials may be right now!

The Fall Lineup -

Here in NE Iowa we are fortunate to live beside the Mississippi River migration corridor it is one of the best places to watch migrating birds. Visit us at The Natural Gait and enjoy the beautiful fall colors and all the birds along with other wildlife.

This Article appeared in eNature

The arrival of fall means different things to different people. For some, the beautiful autumn colors make it a favorite season, while for others it's the mild temperatures, the World Series, or heading back to school. But for birders and their friends who like to watch butterflies, dragonflies, and other animals, the arrival of fall means only one thing: migrations.

The best natural migration corridors occur in mountain ridges, river valleys, and along coastlines. Yet it's possible to see migrating animals just about anywhere. Here are some tips for enjoying the passing hordes.

Birds — Early morning often provides great looks at birds just finished with all-night flights. As the sun starts to rise, some birds that find themselves out over ocean waters or above the Great Lakes will suddenly head for the nearest land. Hundreds of birds can come pouring inland at these times, among them thrushes, warblers, vireos, and tanagers.

During daylight hours, the skies can be filled with everything from White Pelicans to Bobolinks. Expect lots of shorebirds, cormorants, terns, and gulls at the seaside and hawks, swifts, flickers, jays, swallows, and robins overhead almost everywhere.

Butterflies — Most people have heard about Monarchs and their fall migrations to the mountains of southern Mexico, but lots of other butterflies travel in autumn. Some even head north!

Watch in the same places that bird migrants concentrate for American Ladies, Question Marks, Red Admirals, and the more abundant Monarchs — all moving southward. By contrast, Cloudless Sulphurs may be headed north in fall, as their southern populations expand, and Painted Ladies and Common Buckeyes can be watched for flying north or south.

Dragonflies — Dragonfly watching is fast coming into its own on the North American nature scene. Partly that's because several excellent books have appeared to help folks tell these handsome creatures apart.

A small number of dragonfly species migrate in substantial numbers during the fall. Look for the monster Green Darner in particular and the world's most cosmopolitan dragonfly, the Wandering Glider. Others include the Black Saddlebag and the Carolina Saddlebag.

Mammals — Mammal watching is not nearly as easy as bird or insect watching. After all, the mammals first must be found, which usually involves some trekking, and they're not terribly cooperative subjects. Still, the rewards can be considerable.

Among the migratory mammals worth watching are some species of bats (Hoary, Silver-haired, and Red) that can occasionally be seen flying south during daylight hours along shorelines or even over bodies of water. Marine mammals, of course, can be observed from boats or coastal promontories. The large baleen whales occur in good numbers on their southward migrations and delight people even from a distance.

Conservation Project Nabs $1M Grant to Protect Land

Thom Gabrukiewicz • tgabrukiew@argusleader.com • September 23, 2009

A new conservation project concentrated in Deuel, Grant and Roberts counties received a $1 million grant to help protect unbroken tracts of prairie across the Dakotas and Minnesota.
Prairies Without Borders seeks to protect sections of the Prairie Coteau region, which encompasses more than 1 million acres of native northern tallgrass. The money will go toward buying U.S. Fish and Wildlife Service grassland and wetland easements, with an emphasis on getting easements on large contiguous tracts of native grassland.
The venture seeks to protect 3,106 acres within the three-county focus area.
"South Dakota has the largest concentration of tallgrass prairie, and we're working on protecting what's out there," said Pat Anderson, executive director of the Northern Prairies Land Trust. "This allows us to protect animal and plant life, too, so it can continue to grow and populate the area."
The Prairie Coteau is a 200-mile-long, 100-mile-wide swath of lake-dappled prairie that covers parts of the Dakotas and Minnesota. It is the largest remaining tallgrass prairie in the U.S.
Yet since 2002, more than 240,000 acres of eastern South Dakota native prairie have been converted into cropland.
"These easements allow the landowners to retain a working landscape, but also maintain the tallgrass prairie by preventing native and restored prairies from being plowed up," said Tom Tornow, with the Fish and Wildlife Service's Madison Wetland Management District.
While focused on the three eastern South Dakota counties, the project area stretches across 23 counties in South Dakota, nine counties in North Dakota and 50 counties in Minnesota.
"This project is unique in that it recognizes the need to protect grasslands in Minnesota, South Dakota and North Dakota," said Pete Bauman, area manager for The Nature Conservancy, which helped organize the project.
Other project partners include the U.S. Fish and Wildlife Service; the South Dakota Department of Game, Fish and Parks; and the Minnesota Department of Natural Resources.
Reach Thom Gabrukiewicz at 331-2320.

Eavesdrop on Richard Branson and Dr. Stephen Covey

My friends, Alex Mandossian and Greg Habstritt, are holding an incredible series of training calls starting Wednesday. They will be featuring interviews with not just Richard Branson and Dr. Stephen Covey, but 10 other world experts and authorities!

You’ll hear directly from people like Tony Hsieh, the CEO of Zappos.com, who just sold for over $900 million to Amazon .. it’s obvious that there ARE people doing well even when the media is reporting gloom and doom!

In all, you’ll learn from 12 of the greatest minds in the world today. Best-selling authors, incredible business visionaries, and some of the most insightful experts are going to share their secrets with you. People like Bill Phillips (Body-for-LIFE), Janet Attwood (The Passion Test), Bill Harris (star of ‘The Secret’), Marci Shimoff (Happy For No Reason), and the list goes on!

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The 9 Timless Secrets to Being Happy

An awesome video

Pet Tales: Attracting Fireflies, Warding Off Mosquitoes.

Saturday, August 08, 2009
By Linda Wilson Fuoco, Pittsburgh Post-Gazette

Mosquitoes thrive when wet weather leaves pools of water where they can lay eggs.

Where have all the lightning bugs gone?

Growing up in the 1950s, I saw hundreds of them on warm summer nights. Now I see few, if any. The kids in my Bethel Park neighborhood had contests to see who could catch the most fireflies. We scooped them into jars and punched holes in the screw-on lids. We oh-so-helpfully put blades of grass in the jars to give the bugs something to eat.

The bugs always died in their jars while we slept. Some animal lovers we were.

The lightning bugs' disappearance isn't my imagination, says David Mizejewski, naturalist at the National Wildlife Federation. They've been driven away by "light pollution" and the overuse of pesticides, he says. They lose habitat when fields, woods and wetlands are destroyed to make way for houses and shopping centers.

While Pittsburghers call them lightning bugs, Mr. Mizejewski calls them fireflies, although he says they're neither bugs nor flies. They're beetles. He has tips for attracting them to your yard, and he's not even judgmental about the jars.

"The best way to enjoy fireflies it to turn off the TV, put away video games and go outside," Mr. Mizejewski said.

The federation has launched a "Be Out There" campaign "to get families across the United States to open the door and get outside." The organization hopes to see healthier kids with a lifelong appreciation of wildlife and nature.

Here's my favorite fun tip from Mr. Mizejewski: "Use a flashlight to mimic firefly flashes. When you flash, the fireflies will respond."

Everyone can attract fireflies, songbirds and other animals by creating "wildlife friendly" yards.

Don't use pesticides. Plant native wildflowers and greenery that provide shelter for fireflies. The grass in your lawn holds no attraction for wildlife, especially if you used chemicals to kill weeds and insects. For more tips, go to www.nwf.org/gardenforwildlife.

"It's OK to catch a few fireflies and keep them in a jar with holes poked in the lid for a few hours," Mr. Mizejewski says. "Just make sure to release them back into nature."

Don't bother putting grass in the jar because that's not what fireflies eat. Adults eat nectar and larvae eat slugs, worms and other soft-bodied invertebrates around streams and ponds.

If you do go outdoors, you'll have to deal with another type of bug -- mosquitoes. Mr. Mizejewski has tips for dealing with them, too.

Mosquitoes are a stretch for a topic in a pet column, but they can carry heartworms that can harm dogs and can carry rare but deadly diseases, like Eastern equine encephalitis, that kill horses.

DEET-based repellents are effective for people but Mr. Mizejewski says don't apply them to dogs or cats because DEET is not approved for pets. Chemical-free solutions include "aromatic herbal repellents," like lemon eucalyptus, which "work if applied frequently."

Here's my favorite skeeter tip:

"Mosquitoes are not strong fliers, and the breeze created by a fan is often all you need to keep a patio or deck mosquito-free so you can enjoy the outdoors."

Fans won't get to the root of the problem, however.

The most important thing is to get rid of standing water that collects in clogged gutters, flower-pot drainage dishes, children's toys and tarps that cover stacks of firewood.

Birdbaths attract birds to your yard, and some birds eat mosquitoes. But empty and refill birdbaths every few days because "it takes a minimum of a week for the metamorphosis from egg to larva to pupa to winged adult," Mr. Mizejewski says.

Another way to deal with mosquitoes is to attract their predators. In ponds and water gardens, "fish feed on mosquito larvae. Just don't release goldfish or other exotic species into natural areas. ... Add plants that attract frogs, salamanders and dragonflies," he says.

Don't put insecticides or oil on the surface of bodies of water because that will kill "beneficial insects" and mosquito predators.

And here's something I've never heard:

"Bug zappers aren't effective against mosquitoes" but they "do kill thousands of beneficial insects each night."

Read more: http://www.post-gazette.com/pg/09220/989411-62.stm#ixzz0NnKO9EI8