Feeds

Prehistoric titanic-snake jungles laughed at global warming

Rainforest similar to ours flourished at 3-5° hotter

Choosing a cloud hosting partner with confidence

Fossil boffins say that dense triple-canopy rainforests, home among other things to gigantic one-tonne boa constrictors, flourished millions of years ago in temperatures 3-5°C warmer than those seen today - as hot as some of the more dire global-warming projections.

Paleocene fossil leaves look similar to those from modern rainforests. Credit: PNAS

Just like a modern jungle. Except with bloody enormous snakes.

The new fossil evidence comes from the Cerrejón coal mine in Colombia, previously the location where the remains of the gigantic 40-foot Titanoboa cerrejonensis were discovered. The snake's discoverers attracted flak from global-warming worriers at the time for saying that the cold-blooded creature would only have been able to survive in jungles a good bit hotter than Colombia's now are.

But now, according to further diggings, there is more evidence to support the idea that a proper rainforest similar to those now seen in the tropics existed at the time of the Titanoboa - despite the much hotter temperatures. This could be seen as conflicting with the idea that a rise of more than two or three degrees would kill off today's jungles with devastating consequences for the global ecosystem of which we are all part.

"Rainforests, with their palms and spectacular flowering-plant diversity, seem to have come into existence in the Paleocene epoch, shortly after the extinction of the dinosaurs 65 million years ago," says Carlos Jaramillo of the Smithsonian Tropical Research Institute. "Forests before the mass extinction were quite different from our fossil rainforest at Cerrejón. We find new plant families, large, smooth-margined leaves and a three-tiered structure of forest floor, understory shrubs and high canopy."

Jaramillo and other boffins from the parent Smithsonian Institution in the US probed fossilised leaf remains and identified the plant families Araceae, Arecaceae, Fabaceae, Lauraceae, Malvaceae and Menispermaceae - which are apparently "still among the most common neotropical rainforest families".

The scientists say that leaf fossil evidence and the very size of the Titanoboa indicate that the jungles of the Paleocene saw temperatures of 30-32°C, as opposed to the 27°C common in the Colombian rainforest today.

A common goal of global-warming reduction efforts is to limit temperature rises to 2 degrees, though some say this is unachievable and a rise of at least 4 degrees is inevitable. The well-known Intergovernmental Panel on Climate Change (IPCC) report of 2007 predicted a rise of 3 degrees by 2100.

The new research could mean that - assuming the warming arrives on schedule - that the world's jungles will not turn to desert as is sometimes expected. Rather, a picture more like that of 65 million years ago might emerge.

"We're going to have a novel climate where it is very hot and very wet. How tropical forest species will respond to this novel climate, we don't know," senior Smithsonian boffin S Joseph Wright told the IPCC at the time.

Fortunately nobody seems to be suggesting that global warming will see the return of enormous 40-foot constrictors. Even the humdrum modern snakes of today's rainforest occasionally perform gut-busting feats such as scoffing entire jaguars, so Titanoboa would presumably have regarded a human being as merely a light snack.

It's possible that the lush superwarm jungles of the globally-warmed future might be a bit less diverse than today's, however, as it seems that the old-time ones were.

"We were very surprised by the low plant diversity of this rainforest. Either we are looking at a new type of plant community that still hadn't had time to diversify, or this forest was still recovering from the events that caused the mass extinction 65 million years ago," says Scott Wing, another Smithsonian scientist involved in the studies.

The scientists say their latest research will be published in the Proceedings of the National Academy of Sciences journal shortly. ®

Choosing a cloud hosting partner with confidence

More from The Register

next story
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Edge Research Lab to tackle chilly LOHAN's final test flight
Our US allies to probe potential Vulture 2 servo freeze
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
Archaeologists and robots on hunt for more Antikythera pieces
How much of the world's oldest computer can they find?
Bacon-related medical breakthrough wins Ig Nobel prize
Is there ANYTHING cured pork can't do?
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.