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Culture, Society & Family Earth & Climate Learning & Education Plants & Animals Subfeature

Wildfire on warming planet requires adaptive capacity at local, national, int’l scales

In some parts of the world, “fire adaptive communities” have learned to live compatibly with wildfire — in some cases for centuries or millennia.

Industrialized nations that view wildfire as the enemy have much to learn from people in some parts of the world who have learned to live compatibly with wildfire, says a team of fire research scientists.

The interdisciplinary team say there is much to be learned from these “fire-adaptive communities” and they are calling on policy makers to tap that knowledge, particularly in the wake of global warming.

Such a move is critical as climate change makes some landscapes where fire isn’t the norm even more prone to fire, say the scientists in a new report published in a special issue of the Philosophical Transactions of the Royal Society B.

“We tend to treat modern fire problems as unique, and new to our planet,” said fire anthropologist Christopher Roos, Southern Methodist University, Dallas, lead author of the report. “As a result, we have missed the opportunity to recognize the successful properties of communities that have a high capacity to adapt to living in flammable landscapes — in some cases for centuries or millennia.“

One such society is the ethnically Basque communities in the French Western Pyrenees, who practice fire management to maintain seasonally flammable grassland, shrub and woodland patches for forage and grazing animals. But the practice is slowly being lost as young people leave farming.

Additionally, Aboriginal people in the grasslands of Western Australia use fire as part of their traditional hunting practices. Children begin burning at a very young age, and the everyday practice is passed down. These fires improve hunting successes but also reduce the impact of drought on the size and ecological severity of lightning fires.

Social institutions support individual benefits, preserve common good
Fire-adaptive communities have social institutions in place that support individual benefits from fire-maintained landscapes while preserving the common good, said Roos, whose fire research includes long-term archaeological and ecological partnerships with the Pueblo of Jemez in New Mexico.

“These institutions have been shaped by long-histories with wildfire, appropriate fire-use, and the development of social mechanisms to adjudicate conflicts of interest,” said Roos, an associate professor in the SMU Department of Anthropology. “There is a wealth of tried and tested information that should be considered in designing local fire management.”

The authors note that globally, a large number of people use fire as a tool to sustain livelihoods in ways that have been handed down across many generations. These include indigenous Australians and North Americans, South Asian forest dwellers, European farmers, and also hunters, farmers and herders in tropical savannahs.

Global Warming will likely bring new fire problems, more flammable landscapes
Global Warming will likely bring new fire problems, such as making some landscapes more flammable, Roos said. More effort will be required to balance conflicting fire management practices between adjacent cultures. Currently most fire-related research tends to be undertaken by physical or biological scientists from Europe, the United States and Australia. Often the research treats fire challenges as exclusively contemporary phenomena for which history is either absent or irrelevant.

“We need national policy that recognizes these dynamic challenges and that will support local solutions and traditional fire knowledge, while providing ways to disseminate scientific information about fire,” Roos said.

The authors point out that one of the greatest policy challenges of fire on a warming planet are the international consequences of smoke plumes and potential positive feedbacks on climate through carbon emissions. Most infamously, wildfire smoke plumes have had extraordinary health impacts during Southeast Asian “haze” events, which result in increased hospitalization and mortality in the region.

Not all fire is a disaster; we must learn to live with and manage fire
Carbon emissions from wildfires can be as much as 40 percent of fossil fuel emissions in any given year over the last decade. Although only deforestation fires and land conversion are a net carbon source to the atmosphere, the contribution of wildfires to global carbon emissions is non-trivial and should be a formal component of international climate dialogs.

“It is important to emphasize that not all fire is a disaster and we must learn how to both live with as well as manage fire,” said co-author Andrew Scott, earth sciences professor at Royal Holloway University of London.

The report, “Living on a flammable planet: interdisciplinary, cross-scalar and varied cultural lessons, prospects and challenges,” was published May 23, 2016 by The Royal Society, the U.K.’s independent scientific academy.

Authors call for holistic study of fire on Earth
The authors are from the United States, Great Britain, Canada, Australia, South Africa and Spain. The synthesis emerged from four days of international meetings sponsored by the Royal Society – the first of its kind for fire sciences.

The authors advocate for greater collaboration among researchers studying all aspects of fire.

Pyrogeography — the holistic study of fire on Earth , “may be one way to provide unity to the varied fire research programs across the globe,” the authors write.

“Fire researchers across disciplines from engineering, the natural sciences, social sciences and the humanities need to develop a common language to create a holistic wildfire science,” said Roos. “The magnitude of the wildfire challenges we face on a warming planet will demand greater collaboration and integration across disciplines, but our job won’t be done unless we are also able to translate our research for policymakers, land managers, and the general public.”

Other co-authors on the scientific paper include Andrew C. Scott, Claire M. Belcher, William G. Chaloner, Jonathan Aylen, Rebecca Bliege Bird, Michael R. Coughlan, Bart R. Johnson, Fay H. Johnston, Julia McMorrow, Toddi Steelman, and the Fire and Mankind Discussion Group. — Southern Methodist University

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Earth & Climate Fossils & Ruins Plants & Animals Researcher news SMU In The News

Dallas Morning News: North Texas dino had tough armor, keen sense of smell

Jacobs said large nostrils that look “like a trumpet bell” and wide air passages helped Pawpawsaurus smell predators, look for food or find mates.

Dallas Morning News journalist Charles Scudder covered the research of SMU Earth Sciences Professor Louis L. Jacobs in a Guide Live article “North Texas dino had tough armor, keen sense of smell.”

A professor in Dedman College‘s Roy M. Huffington Department of Earth Sciences, Jacobs is co-author of a new analysis of the Cretaceous Period dinosaur Pawpawsaurus based on the first CT scans ever taken of the dinosaur’s skull.

A Texas native from what is now Tarrant County, Pawpawsaurus lived 100 million years ago, making its home along the shores of an inland sea that split North America from Texas northward to the Arctic Sea.

The Dallas Morning News article published May 27, 2016.

Pawpawsaurus campbelli is the prehistoric cousin of the well-known armored dinosaur Ankylosaurus, famous for a hard knobby layer of bone across its back and a football-sized club on its tail.

Jacobs, a world-renowned vertebrate paleontologist, joined SMU’s faculty in 1983 and in 2012 was honored by the 7,200-member Science Teachers Association of Texas with their prestigious Skoog Cup for his significant contributions to advance quality science education.

Jacobs is president of SMU’s Institute for the Study of Earth and Man.

Read the full story.

EXCERPT:

By Charles Scudder
Dallas Morning News

A prehistoric skull found 24 years ago by a teenager in Fort Worth is now helping scientists understand the brain functions of a North Texas native. Pawpawsaurus campbelli lived 100 million years ago and was identified in 1996 by Yuong-Nam Lee, then a doctoral student at Southern Methodist University.

Lee and Louis Jacobs, a paleontologist at SMU, have co-authored a new paper that used CT imaging to study the brain of Pawpawsaurus. It’s the first time we’ve seen inside the Pawpawsaurus skull, as few studies have been done on the endocranial anatomy — scientist-speak for brain and skull — of its biological family.

This North Texas dino is named for the Paw Paw Formation, a geological feature where fossils are found in Texas. It lived on the shores of an inland sea that stretched from the Gulf coast to the Arctic. Think the Narrow Sea from Game of Thrones. Dallas is somewhere around Valyria. Arizona is Dorne.

Pawpawsaurus was a herbivore with armored plates on its back and eyelids, but without the clubbed tail characteristic of its younger cousin, Ankylosaurus. It didn’t have the stable vision of Ankylosaurus that helped it wield the clubbed tail. And although Pawpawsaurus had impressive sensory ability compared to its contemporaries, it was still less-evolved than Ankylosaurus.

Read the full story.

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Earth & Climate Fossils & Ruins Plants & Animals Researcher news SMU In The News

Live Science: Dino Senses: Ankylosaurus Cousin Had a Super Sniffer

Louis Jacobs is co-author of a new analysis of the Cretaceous dinosaur Pawpawsaurus based on the first CT scans ever taken of the dinosaur’s skull.

Science journalist Laura Geggel covered the research of SMU Earth Sciences Professor Louis L. Jacobs in her article “Dino Senses: Ankylosaurus Cousin Had a Super Sniffer.”

A professor in Dedman College‘s Roy M. Huffington Department of Earth Sciences, Jacobs is co-author of a new analysis of the Cretaceous Period dinosaur Pawpawsaurus based on the first CT scans ever taken of the dinosaur’s skull.

A Texas native from what is now Tarrant County, Pawpawsaurus lived 100 million years ago, making its home along the shores of an inland sea that split North America from Texas northward to the Arctic Sea.

Pawpawsaurus campbelli is the prehistoric cousin of the well-known armored dinosaur Ankylosaurus, famous for a hard knobby layer of bone across its back and a football-sized club on its tail.

Jacobs, a world-renowned vertebrate paleontologist, joined SMU’s faculty in 1983 and in 2012 was honored by the 7,200-member Science Teachers Association of Texas with their prestigious Skoog Cup for his significant contributions to advance quality science education.

Jacobs is president of SMU’s Institute for the Study of Earth and Man.

Read the full story.

EXCERPT:

By Laura Geggel
Live Science

The armored cousin of the Ankylosaurus dinosaur didn’t have a football-size club on its tail, but it did have a super sense of smell, said scientists who examined its skull.

The Cretaceous-age Pawpawsaurus campbelli walked on all fours and lived in ancient Texas about 100 million years ago, the researchers said. It was an earlier version, so to speak, of the heavily armored Ankylosaurus, which lived about 35 million years later, they said.

But even without an impressive tail club, P. campbelli wasn’t totally defenseless. It sported armored plates on its back and eyelids. A computerized tomography (CT) scan of its braincase also suggests that the dinosaur had an excellent sense of smell for finding prey and avoiding predators.

“CT imaging has allowed us to delve into the intricacies of the brains of extinct animals, especially dinosaurs, to unlock secrets of their ways of life,” study co-author Louis Jacobs, a vertebrate paleontologist at Southern Methodist University in Dallas, Texas, said in a statement.

P. campbelli could have outsniffed other primitive dinosaur predators, including Ceratosaurus, a bipedal, meat-eating dinosaur with blade-like teeth and a horn on its snoutthat lived during the Jurassic period, the researchers said.

CT scans suggest that P. campbelli’s sense of smell — calculated by comparing the size of the brain’s olfactory bulb to the cerebral hemisphere — is somewhat less powerful than that of Ankylosaurus, said study lead researcher Ariana Paulina-Carabajal, a vertebrate paleontologist at the Biodiversity and Environment Research Institute (CONICET-INIBIOMA) in San Carlos de Bariloche, Argentina.

“Although both [P. campbelli and Ankylosaurus] have high ratios when compared with most carnivorous dinosaurs,” she said, “they are exceeded only by carcharodontosaurids and tyrannosaurids.”

Read the full story.

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Earth & Climate Fossils & Ruins Plants & Animals Researcher news SMU In The News

Live Science: Fearsome Dinosaur-Age ‘Hammerhead’ Reptile Ate … Plants?

SMU paleontologist Louis Jacobs quoted by Live Science for article on prehistoric plant-eating reptile

Hammerhead reptile, vegetarian, Jacobs, SMU

Science journalist Laura Geggel tapped the expertise of SMU Earth Sciences Professor Louis L. Jacobs for a recent article about a prehistoric plant-eating reptile.

A professor in Dedman College‘s Roy M. Huffington Department of Earth Sciences, Jacobs is a world-renowned vertebrate paleontologist.

He joined SMU’s faculty in 1983 and in 2012 was honored by the 7,200-member Science Teachers Association of Texas with their prestigious Skoog Cup for his significant contributions to advance quality science education.

Jacobs is president of SMU’s Institute for the Study of Earth and Man.

Read the full story.

EXCERPT:

By Laura Geggel
Live Science

Despite its rows and rows of chisel- and needle-like teeth, a newly described prehistoric marine reptile wasn’t a fearsome predator but rather an herbivorous giant that acted like a lawnmower for the sea, a new study finds.

The crocodile-size reptile lived about 242 million years ago, during the Middle Triassic period. Researchers discovered the first specimen in 2014 in southern China, but because it was poorly preserved, they reported that it had a beak like a flamingo’s.

Now, two newly discovered specimens show that the beast was far more bizarre: It sported a hammerhead-shaped snout that it likely used to graze on plants lining the ocean floor, the researchers said. It’s also the earliest herbivorous marine reptile on record by about 8 million years, they said. [The 12 Weirdest Animal Discoveries]

“I haven’t seen anything like it before,” said study co-researcher Olivier Rieppel, the Rowe family curator of evolutionary biology at The Field Museum of Natural History in Chicago.

Weird reptile
The reptile’s name — Atopodentatus unicus — hints at its weird anatomy. In Latin, the genus and species names translate to “unique strangely toothed,” the researchers said. The newly analyzed specimens show that the creature had a mouthful of chisel-shaped teeth — one row on the upper jaw and two rows on the lower jaw.

“The remaining parts of the jaw [are filled with] densely packed needle-shaped teeth forming a mesh,” the researchers wrote in the study, published online today (May 6) in the journal Science Advances. This mesh likely helped A. unicus collect plant material, much like a baleen whale catches krill, said Louis Jacobs, a vertebrate paleontologist at Southern Methodist University in Texas who was not involved in the study.

The chisel-like teeth probably acted as a rake and trimmer, helping A. unicus scrape and dislodge plants from the seafloor, Jacobs said. Next, the reptile likely sucked in a mouthful of water, letting bits of plants get stuck in the mesh formed by its thin, needle-like teeth, he said.

“Then, they squish the water out of their mouth, and those little teeth along the sides of the jaw and on the roof of the mouth strain out all of the plant bits,” Jacobs told Live Science. “That’s an amazing way to feed. I’d like to do that myself.”

Read the full story.

Follow SMU Research on Twitter, @smuresearch.

For more SMU research see www.smuresearch.com.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information, www.smu.edu.

SMU has an uplink facility located on campus for live TV, radio, or online interviews. To speak with an SMU expert or book an SMU guest in the studio, call SMU News & Communications at 214-768-7650.

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Health & Medicine Plants & Animals

Good news! You’re likely burning more calories than you thought

Leading standardized equations used to predict or estimate walking energy expenditure — calories burned — count too few calories in nearly all cases on level surfaces, study finds. New method improves accuracy.

Jennifer Nollkamper and Dr. Lindsay Ludlow assist Dr. Takeshi Fujii in a treadmill test that captures volume of oxygen, volume of expired air and the levels of oxygen and carbon dioxide, all variables that help measure energy expenditure during walking. (Hillsman Jackson, SMU)
Jennifer Nollkamper and Dr. Lindsay Ludlow assist Dr. Takeshi Fujii in a treadmill test that captures volume of oxygen, volume of expired air and the levels of oxygen and carbon dioxide, all variables that help measure energy expenditure during walking. (Hillsman Jackson, SMU)

Walking is the most common exercise, and many walkers like to count how many calories are burned.

Little known, however, is that the leading standardized equations used to predict or estimate walking energy expenditure — the number of calories burned — assume that one size fits all. The equations have been in place for close to half a century and were based on data from a limited number of people.

A new study at Southern Methodist University, Dallas, found that under firm, level ground conditions, the leading standards are relatively inaccurate and have significant bias. The standards predicted too few calories burned in 97 percent of the cases researchers examined, said SMU physiologist Lindsay Ludlow.

A new standardized equation developed by SMU scientists is about four times more accurate for adults and kids together, and about two to three times more accurate for adults only, Ludlow said.

“Our new equation is formulated to apply regardless of the height, weight and speed of the walker,” said Ludlow, a researcher in the SMU Locomotor Performance Laboratory of biomechanics expert Peter Weyand. “And it’s appreciably more accurate.”

Ludlow and her colleagues report the new equation in the Journal of Applied Physiology, “Energy expenditure during level human walking: seeking a simple and accurate predictive solution.” The article is published in the March 1, 2016 issue, and available online at this link.

“The economy of level walking is a lot like shipping packages – there is an economy of scale,” said Weyand, a co-author on the paper. “Big people get better gas mileage when fuel economy is expressed on a per-pound basis.”

The SMU equation predicts the calories burned as a person walks on a firm, level surface. Ongoing research is expanding the algorithm to predict the calories burned while walking up- and downhill, and while carrying loads, Ludlow said.

SMU’s research is funded by the U.S. Department of Defense Medical Research and Materiel Command. The grant is part of a larger DOD effort to develop load-carriage decision-aid tools to assist foot soldiers.

The research comes at a time when greater accuracy combined with mobile technology, such as wearable sensors like Fitbit, is increasingly being used in real time to monitor the body’s status. The researchers note that some devices use the old standardized equations, while others use a different method to estimate the calories burned.

New equation considers different-sized people
To provide a comprehensive test of the leading standards, SMU researchers compiled a database using the extensive walking metabolism data available in the existing scientific literature to evaluate the leading equations for walking on level ground.

“The SMU approach improves upon the existing standards by including different-sized individuals and drawing on a larger database for equation formulation,” Weyand said.

The new equation achieves greater accuracy by better incorporating the influence of body size, and by specifically incorporating the influence of height on gait mechanics. Specifically:

  • Bigger people burn fewer calories on a per pound basis of their body weight to walk at a given speed or to cover a fixed distance;
  • The older standardized equations don’t account for size differences well, assuming roughly that one size fits all.

Accuracy of standardized equations had not previously undergone comprehensive evaluation
The exact dates are a bit murky, but the leading standardized equations, known by their shorthand as the “ACSM” and “Pandolf” equations, were developed about 40 years ago for the American College of Sports Medicine and for the military, Ludlow said.

The Pandolf method, for example, draws on walking metabolism data from six U.S. soldiers, she said. Both the Pandolf and ACSM equations were developed on a small number of adult males of average height.

The new more accurate equation will prove useful. Predicting energy expenditure is common in many fields, including those focused on health, weight loss, exercise, military and defense, and professional and amateur physical training.

“Burning calories is of major importance to health, fitness and the body’s physiological status,” Weyand said. “But it hasn’t been really clear just how accurate the existing standards are under level conditions because previous assessments by other researchers were more limited in scope.”

Energy expenditure estimates could assist with monitoring the body’s physiological status
Accurate estimations of the rate at which calories are burned could potentially help predict a person’s aerobic power and likelihood for executing a task, such as training for an athletic competition or carrying out a military objective.

In general, the new metabolic estimates can be combined with other physiological signals such as body heat, core temperature and heart rate to improve predictions of fatigue, overheating, dehydration, the aerobic power available, and whether a person can sustain a given intensity of exercise.

Military seeks solutions to overburdened soldier problem
The military has a major interest in more accurate techniques to help address their problem of over-burdened soldiers.

“These soldiers carry incredible loads — up to 150 pounds, but they often need to be mobile to successfully carry out their missions,” said Weyand, a professor of Applied Physiology and Wellness in the SMU Simmons School of Education.

Accurately predicting how many calories a person expends while walking could supply information that can help soldiers avoid thermal stress and fatigue in the field, especially troops deployed to challenging environments.

“Soldiers incur a variety of physiological and musculoskeletal stresses in the field,” Weyand said. “Our metabolic modeling work is part of a broader effort to provide the Department of Defense with quantitative tools to help soldiers.” — Margaret Allen

Follow SMUResearch.com on twitter at @smuresearch.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

SMU has an uplink facility located on campus for live TV, radio, or online interviews. To speak with an SMU expert or book an SMU guest in the studio, call SMU News & Communications at 214-768-7650.