picture © Ben Rainesscreen-shot-2017-06-08
An ancient underwater forest found south of Alabama's Gulf Shores in the
Gulf of Mexico could provide a time capsule to a pre-human era on Earth.
The cypress forest dates back to an Ice Age more than 60,000 years ago
when sea levels were 400 feet lower than today, according to the new
documentary "The Underwater Forest," made by environmental reporter
and filmmaker Ben Raines. Raines first went in search of the site after he was
tipped off by a savvy local source, he explained in a
Reddit "Ask Me Anything" forum.
"I first learned of the Underwater Forest
from a dive shop owner in Alabama," Raines said. "He discovered the
forest about a year after Hurricane Ivan, when a fisherman came into the dive
shop and said, 'I've found this spot that's just loaded with fish but there's
barely anything in terms of structure that shows up on my depth finder. Why
don't you go out there and take a look?'"
In analyzing the site, DeLong's team of dendrochronologists (specialists in
tree-ring dating), geologists and paleontologists is collecting rare
information on Ice Age-era climate, rainfall, insects and plants, building new
insights into what Earth looked like before humans inhabited it. It took years,
but Raines finally convinced the shop owner to show him the exact site, he said.
He wrote a story about the discovery, and immediately received a call from
paleoclimatologist Kristine DeLong of Louisiana State University asking if she
could carbon date some samples from the site.
With that, Raines and DeLong formed a partnership to extract as much
knowledge from the site as possible while also preserving its natural wonders —
the story of which is told in the film.
The first scientific expedition to the site happened in 2012, and DeLong
continues leading a team of scientists studying its secrets. Unique conditions
have sealed the forest in a sort of "underwater time capsule," the
team said.
It's believed to be the world's only preserved coastal Ice Age forest, long
hidden beneath the sea.
should decompose on a 10,000 year time scale — suggesting that, at this
particular site, the cypress has survived much longer thanks to low-oxygen
sediments that bar bacteria from decomposing the wood, DeLong explained on
Reddit.
Further research into the forest could shed light on a phenomena currently
gripping humans on Earth:
rapid sea level rise due to climate change. Sea level rise was
particularly intense across the planet back when the forest was thriving,
Raines said.
In the U.S.,
chronic flooding linked to sea level rise is expected to
destabilize hundreds of communities by the end of this century,
according to recent analysis from the Union of Concerned Scientists. More than
90 coastal communities in the U.S. already cope with chronic inundation.
In sharing their story, the team remains cagey on one crucial detail: the
precise location coordinates of the site.
To protect the forest remnants, the team generally follows
scuba diving procedures used in the world's
precious but fragile coral reefs, avoids disturbing the floor
of the site, and uses only noninvasive scientific instruments that move above
the seafloor to map the area, DeLong and Raines explained on Reddit.
The team is working with federal agencies like the Bureau of Ocean Energy
Management and the National Oceanic and Atmospheric Administration to preserve
the site.
Shanika Gunaratna @CBSNews