A Bog’s Goodbye

  • Greg Seymour, with the Ohio Department of Natural Resources, walking through Cranberry Bog (Photo by Christina Morgan)

It’s normal to want to protect special
places in nature. But in some cases, these
places are disappearing simply because of nature.
Christina Morgan reports on an ancient spot that
might disappear in our lifetime. The people who
love it want to save it, but they might have to
let it go:

Transcript

It’s normal to want to protect special
places in nature. But in some cases, these
places are disappearing simply because of nature.
Christina Morgan reports on an ancient spot that
might disappear in our lifetime. The people who
love it want to save it, but they might have to
let it go:

For four generations, J-me Braig’s family has visited a rare
site, a bog left behind by glaciers thousands of years ago.

“As a child, I used to go out there and play on it, with my
grandmother, and we would pick cranberries; my brother and I would play on it. ”

Braig says her grandmother used to take a boat out to the bog
in a lake in Ohio. Her grandmother made pies and wine with
the cranberries.

Braig is a lake historian who’s worried about the bog. That’s
because it’s shrinking.

But before we talk about why it’s shrinking, though, it’s important
to know what makes this tiny area special.

Webster’s dictionary defines a bog as soft, waterlogged
ground. This bog, Cranberry Bog, is soft and waterlogged.
But it’s not ground. There’s no dirt. The bog is a 10 acre
patch of sphagnum moss.

Most bogs surround a glacial lake. Instead, Cranberry Bog is
surrounded by a lake, and floating. Here’s what happened.

Nearly 200 years ago, crews digging in an ancient river bed
created a reservoir to feed the Ohio and Erie canal. The
reservoir filled, the mossy bog floated to the surface. How or
why it stayed, no one knows.

“An absolute oddity. It shouldn’t be here.”

Greg Seymour is with the Ohio Department of Natural
Resources. He says the ancient bog is home to likely the only collection
of plants of its kind in the world.

More than 150 plants, a
handful native to Canada. Nudged southward by the glacier,
the plants are tricked by the cool bog mat into thinking they
never left home.

The bog is shrinking for several reasons. Waves from passing
boats loosen the bog mat. Storms topple trees
which rip out chunks of the mat. But Seymour says the biggest
threat is the bog’s chemistry, which makes the site its own
worst enemy.

“The number one factor is going to be the chemical reaction
between the alkaline lake waters and the acidic bog.”

The pH balance is off – way off. Cranberry Bog is doomed to disappear, probably within 30
years.

But area historian J-Me Braig remains upbeat, saying ever
since she can remember, someone has had a scheme to save
Cranberry Bog.

And sure enough, there is a new group determined to preserve the
ancient bog.

George O’Donnell leads Friends of Cranberry Bog. He and
others think one way to generate interest in the site, is to inventory of all that the bog has to offer.
Such an inventory is being done by the bog’s neighbor 8 miles
to the north, Dawes Arboretum.

Tim Mason is the manager of natural resources there. He says even
if the inventory and other efforts to preserve the bog fail, they
have a plan B. Dawes created a restoration area where pieces
of Cranberry Bog that break off are placed.

“We can just hold on to what’s there. It takes thousands of
years for the peat moss material to grow; so to create that is something we would certainly not see in
our life times.”

Saving the bog – or just preserving its pieces – are a long shot.
Yet the efforts persist. Historian J-Me Braig is one of many people
who hope for success. But even Braig admits, after more than
10,000 years, Cranberry Bog has had a pretty good run.

For The Environment Report, I’m Christina Morgan.

Related Links

Growing Zones Warm Up

  • The National Arbor Day Foundation's revised hardiness zone map. (Photo courtesy of the National Arbor Day Foundation)

If you’ve been thinking about landscaping your yard, you should know things have
changed. The climate is warming so quickly that one organization has changed the
plant hardiness zone map. That’s the little map you sometimes see on the back of
seed packets. Lester Graham reports… you might want to check out the new map
before you spend hundreds of dollars on a tree that might not live long in your
warmer zone:

Transcript

If you’ve been thinking about landscaping your yard, you should know things have
changed. The climate is warming so quickly that one organization has changed the
plant hardiness zone map. That’s the little map you sometimes see on the back of
seed packets. Lester Graham reports… you might want to check out the new map
before you spend hundreds of dollars on a tree that might not live long in your
warmer zone:


You know, I’ve talked to a lot of gardeners and homeowners who do their own
landscaping about this plant hardiness zone map change, and at first they’re
kind of astounded. The growing zones are changing? Because it’s getting warmer?


But then, they sort of pause and think for a moment… and usually say something like,
“That makes sense.”


The United States Department of Agriculture issues the plant hardiness zone map.
It’s basically a map of the annual average low temperatures that helps folks figure
out what they can plant and expect to survive. But the USDA hasn’t updated its map
since 1990.


The spokesman at the National Arbor Day Foundation, Woody Nelson – I kid you not,
the Arbor Day guy’s name is Woody – Woody says his organization issued a new
map because it really needed to be updated:


“You know, people were asking us to help out, you know, ‘This old USDA map just doesn’t
seem to work for us anymore. I don’t think it’s accurate. What can you do to help?’
So we took it upon ourselves to give tree-planters the most up-to-date information
that we could.”


So the National Arbor Day Foundation looked at the low temperature data gathered
by the National Oceanic and Atmospheric Administration since 1990, and the people
were right: things are warming up:


“And over that 15-year span that we used, much of the country had warmed a full
hardiness zone.”


And there’s a ten degree difference from one zone to the next. It shows a real on-
the-ground trend.


Richard Andres is with Tantre Farm. They grow organic produce for farmers’
markets like this one in Michigan. Andres didn’t know about the new Arbor Day
Hardiness Zone map, but it makes sense to him. He says he’s seeing more
extremes:


“You know, last winter was unusually warm. The winter before, unusually warm.
So, we really didn’t even get a decent freeze. We had a huge amount of bugs the
following spring. So we are noticing more extremes.”


But a farmer or gardener can adjust things for annual plants. Long term, you’re
probably wondering whether you can now plant that dogwood or whether you
should plant that spruce from up north.


(Sound of sprinkler)


Phil Walsh sells a lot of trees at Lodi Farms nursery. He knew about the new Arbor
Day Hardiness Zone map. But, he says there’s a lot more to think about than just
the annual average low temperature when you’re thinking about planting:


“Cold is not the only, or really the most, important factor when determining plant
hardiness. Questions like soil: is it well-drained; is it not; is it wet; is it dry; is it acid
or is it alkaline; do you have wind; do you have shade? Questions like this: is it high
in organic material or low in organic material? These tend to have more impact on
whether or not plants survive than strictly the zone rating.”


Walsh says the trees are pretty tough, and most of them can adapt:


“Yes, things have warmed up over the last 15 years and they may well continue or it may change and it may go down. Pick a good, hardy plant that’s well-suited for your soil
and typically one that’s native here, that’s gone through these temperature changes
in the past and I don’t expect anybody’s going to have any problems with them.”


That’s not to say that every kind of tree is taking this in stride. For example, black
spruce trees adapted to Canadian and upper New England cold might not be such a
good choice as far south as it’s been grown in the past.


Woody Nelson at the National Arbor Day Foundation says trees native to the North
are starting to be affected by the warming climate:


“There’s a whole lot of white pines that have been planted in Georgia, in the South
as a nice landscape tree over the years. And now those white pines are coming
under a little bit of stress. The native lodge pole pines, the native loblolly pines in the
deep South, again native species are something that we want to promote and stick
with.”


So, the basic rule is: if the plant hardiness zone map has shifted one growing zone
warmer in just 15 years, you’ll probably want to stick to trees native to your area, or
from just a little south of you just in case this warming trend sticks around for a while.


For the Environment Report, this is Lester Graham.

Related Links