Categories
Climate Change Global Change News Opinion

Protected forests, parks & marine sanctuaries are basic life support systems

From the New York Times

By Thomas Friedman

I PARTICIPATED in the World Parks Congress in Sydney last week and learned a new phrase: “a black elephant.” A black elephant, explained the London-based investor and environmentalist Adam Sweidan, is a cross between “a black swan” (an unlikely, unexpected event with enormous ramifications) and the “elephant in the room” (a problem that is visible to everyone, yet no one still wants to address it) even though we know that one day it will have vast, black-swan-like consequences.

“Currently,” said Sweidan, “there are a herd of environmental black elephants gathering out there” — global warming, deforestation, ocean acidification, mass extinction and massive fresh water pollution. “When they hit, we’ll claim they were black swans no one could have predicted, but, in fact, they are black elephants, very visible right now.” We’re just not dealing with them at the scale necessary. If they all stampede at once, watch out.

No, this is not an eco-doom column. This one has a happy ending — sort of. The International Union for Conservation of Nature holds the parks congress roughly every 10 years to draw attention to the 209,000 protected areas, which cover 15.4 percent of the planet’s terrestrial and inland water areas and 3.4 percent of the oceans, according to the I.U.C.N.

I could have gone to the Brisbane G-20 summit meeting, but I thought this was more important — and interesting. A hall full of park exhibits and park rangers from America, Africa and Russia, along with a rainbow of indigenous peoples, scientists and environmentalists from across the globe — some 6,000 — focused on one goal: guarding and expanding protected areas, which are the most powerful tools we have to restrain the environmental black elephants. How so?

It starts with a simple fact: Protected forests, marine sanctuaries and national parks are not zoos, not just places to see nature. “They are the basic life support systems” that provide the clean air and water, food, fisheries, recreation, stable temperatures and natural coastal protections “that sustain us humans,” said Russ Mittermeier, one of the world’s leading primatologists who was here.

That’s why “conservation is self-preservation,” says Adrian Steirn, the South Africa-based photographer who spoke here. Every dollar we invest in protecting natural systems earns or saves multiple dollars back. Ask the people of São Paulo, Brazil. They deforested hillsides, destroyed their watersheds, and now that they’re in prolonged drought, they’re running out of water, losing thousands of jobs a month. Watch that story.

Walking around the exhibit halls here, I was hit with the reality that what we call “parks” are really the heart, lungs, and circulatory systems of the world — and they’re all endangered.

Read the complete article

Categories
Evolution News

McGlothlin research explores the evolution of toxin resistance in snakes

From VT News:

Snakes in evolutionary arms race with poisonous newt

Blacksburg, November 17, 2014: The rough-skinned newt is easily one of the most toxic animals on the planet, yet the common garter snake routinely eats it. How does a newt which produces enough toxin to kill several grown humans manage to become prey in the food chain?

The answer comes in the form of an evolutionary arms race that pits the toxin of the newt, tetrodotoxin or TTX, against the voltage-gated sodium channels of the snake. The newt’s toxin typically blocks sodium channels, which are found in excitable tissue including muscles, nerves, brain, and heart, but garter snakes seem immune to its effects.

mcgl_joel
Dr. Joel McGlothlin is a faculty member in the Interfaces of Global Change Program

Joel McGlothlin, assistant professor of biological sciences in the College of Science at Virginia Tech with a team of scientists that included his former postdoctoral advisor Edmund Brodie III of the University of Virginia, looked for clues to the evolution of TTX resistance in the DNA sequences of garter snake sodium channels.

“There are nine different sodium channels in reptiles, found in different tissues of the body,” McGlothlin said. “We knew when we started that muscle channels had evolved resistance to TTX in garter snakes, and we predicted that many of the others should have too. If you’re going to eat poison, you not only need to have muscles that work, the nerves that control them have to work too.”

McGlothlin sequenced the DNA of five previously undescribed garter snake sodium channels and examined them for signatures of TTX resistance. Of these, three are found primarily in the brain and two are found in motor and sensory nerves outside the brain. The brain channels had not evolved resistance to TTX at all.

“The brain is protected by the blood-brain barrier, so it makes sense that these channels wouldn’t have evolved resistance” he said. Many chemicals can’t cross this barrier, which separates the fluid around the brain and spinal column from the reset of the body. TTX is one of the things that can’t cross.

“The two nerve channels outside the brain, however,” McGlothlin said, “have both evolved resistance to the toxin, and they’ve done so independently. When we compared the DNA sequences to a closely related lizard, there were changes unique to the snakes that should provide resistance to the toxin.”

The paper, published in the journal Molecular Biology and Evolution, shows that at least three sodium channels contribute to resistance to TTX: NaV1.4 in muscle, NaV1.6 in rapid-firing neurons, and NaV1.7 in sensory neurons involved with smell and pain sensation.

Only garter snakes on the west coast have resistant muscle channels, where they live in proximity to the toxic rough-skinned newts. However, the team showed that resistant nerve channels are found in all garter snakes, even in areas without highly toxic prey.

“Garter snakes here in Virginia have the same resistant channels in their nerves, even though there are no rough-skinned newts around,” McGlothlin said.

Virginia’s red-spotted newts have much less TTX than their western cousins, and resistant nerves might be enough to protect garter snakes that eat them.

“The fact that all garter snake have resistant nerve channels suggests resistant nerves evolved earlier than resistant muscle,” he said, “which might have allowed garter snakes to start eating really poisonous newts in the first place.”

McGlothlin says the work shows that the molecular basis of adaptation is somewhat predictable.

“The evolution of toxin resistance was predictable based on the biology of the snake—only the channels that are vulnerable to the toxin evolved resistance. Also, we see changes in the similar regions of these three genes, which suggests they’re evolving in similar ways in response to the same selection pressure.”

The work has prompted McGlothlin to take a deeper look into evolutionary history as he suspects some of these sodium channels evolved resistance to TTX in the ancestors of garter snakes – perhaps as long as 100 million years ago.

McGlothlin is currently examining the DNA sequences of the Nav gene family across snakes, lizards, and birds – some of which also count newts as a food source. “If we look at this gene family across all of these groups, we should be able to determine whether evolving resistant sodium channels is a general response to eating toxic prey or whether it is unique to snakes,” he said.

Story by Rosaire Bushey; See the original article at VT News

Categories
Accolades Interfaces of Global Change IGEP News Student Spotlight

Jon Doubek is a GLEON fellow!

Jon Doubek
Jon Doubek

Jon Doubek , a PH.D. student in Biological Sciences and a fellow in the Interfaces of Global Change Program, has been invited to be a Global Lake Ecological Observatory Network (GLEON) Fellow!

The GLEON Fellowship Program trains small cohorts of graduate students from around the world to analyze large and diverse data sets, operate effectively in diverse international teams, and communicate science to researchers, the public, and managers. As a GLEON Fellow, Jon will take part in three international workshops over the next 1.5 years while completing an interdisciplinary, collaborative scientific project.

Congratulations, Jon!

 


More information on the GLEON Fellowship Program can be found here.

Categories
Accolades News Research

Lisa Belden receives the Innovator Award

From VT News

Lisa Belden, an associate professor of biological sciences and a faculty member in the Interfaces of Global Change IGEP, was recently recognized for her commitment to advancing the university’s research initiatives in engineering and the life sciences.

The Innovator Award, a new initiative jointly sponsored by the Institute for Critical Technology and Applied Sciences and the Fralin Life Science Institute, recognizes outstanding faculty members and includes a $25,000 stipend to be used to advance innovative research projects.

Dr. Belden studies how ecological factors and environmental conditions influence disease dynamics in natural systems. Her recent work examines symbiotic microbes that live on amphibian skin, with a goal of using these microbes to battle a lethal skin fungus and contribute to the conservation of threatened amphibian species.

Belden accepts award

“ICTAS and Fralin have joined to recognize and reward some of our outstanding faculty in a way they did not anticipate,” said Dennis Dean, director of the Fralin Life Science Institute. “We have many terrific innovators at this university and by recognizing at least several such individuals on a recurring basis, we are sending the message that this university is aware of and appreciates innovation.  A special aspect of the group recognized this year is their very visible collaborative and interdisciplinary approaches.”

“By joining hands with the Fralin Life Science Institute, we are able to reward pioneering faculty members for their innovative and transformative research,” said Roop Mahajan, director of the Institute for Critical Technology and Applied Science. “It is important to show our appreciation for their continued success in meeting society’s most challenging needs. The Innovator Award seeds an opportunity for these individuals to expand their research capabilities and have an even greater impact on the future.”

Read the full article at VT News.

Story by Lindsay Key

Categories
Climate Change Global Change New Books News

Naomi Oreskes’ new book imagines the future history of climate change

From the New York Times

by Claudia Dreifus

Naomi Oreskes is a historian of science at Harvard, but she is attracting wide notice these days for a work of science fiction.

“The Collapse of Western Civilization: A View From the Future,” written with Erik M. Conway, takes the point of view of a historian in 2393 explaining how “the Great Collapse of 2093” occurred.

“Without spoiling the story,” she told me, “I can tell you that a lot of what happens — floods, droughts, mass migrations, the end of humanity in Africa and Australia — is the result of inaction to very clear warnings” about climate change caused by humans. The 104-page book was listed last week as the No. 1 environmental best-seller on Amazon. Dr. Oreskes, 55, spoke with me for two hours at her home in Concord, Mass., and later again by telephone. Here is an edited and condensed version of the conversations.

Q. YOU ARE A GEOLOGIST AND HISTORIAN BY TRADE. HOW DID CLIMATE CHANGE BECOME THE CENTER OF YOUR RESEARCH?

A. Like many people, I used to think the scientific community was divided about climate change. Then in 2004, as part of a book I was doing on oceanography, I did a search of 1,000 articles published in peer-reviewed scientific literature in the previous 10 years.

I asked how many showed evidence that disagreed with the statement made in the Intergovernmental Panel on Climate Change’s report: “Most of the observed warming over the past 50 years is likely to have been due to the increase in greenhouse gas concentrations.” I found that none did. Zero.

That was astonishing, because if someone like myself had believed that the science was unsettled, what did the ordinary citizen think? I published my finding in Science. The article was called “The Scientific Consensus on Climate Change.”

It ignited a firestorm. I started getting hate mail. Letters arrived at my university demanding I be fired. At the same time, Al Gore talked about my paper in “An Inconvenient Truth.” Suddenly, I was a hero to the left because of Al Gore and a demon to the right because I was now part of the conspiracy to bring down capitalism. I thought I’d entered a parallel universe.

WHAT ACTUALLY WAS HAPPENING?

I didn’t know it, but when I’d used the word “consensus,” I’d hit a land mine. For those who claim that climate change is a myth, the term “consensus” will — boom! — trigger a backlash. That’s because their strategy is based on spreading the idea that the science is still unsettled. Why? Because if you don’t know for sure there’s a problem, you can’t justify doing anything about it.

Read the entire article at the New York Times.

 

Categories
Accolades Disease Global Change Interfaces of Global Change IGEP News October 2014 Newsletter

Laura Schoenle receives a 2014 EPA STAR Fellowship

Laura Schoenle, a fellow in the Interfaces of Global Change Program, was recently awarded a EPA STAR Fellowship for 2014.  This very competitive graduate fellowship program from the Environmental Protection Agency supports masters and doctoral candidates in environmental studies. Her award will cover tuition, salary, and $10,000 for research/expenses.

Laura will be studying the effects of mercury exposure on how red-winged blackbirds resist and tolerate infection with avian malaria. Laura is co-advised by Ignacio Moore (Virginia Tech) and Fran Bonier (Queen’s University).

Laura Schoenle
Laura Schoenle

“Laura’s work is really novel in that she is investigating interactions between stress and disease,” Moore said. “Most people look at one or the other. And yet, wildlife are facing assaults from multiple factors and thus studies like Laura’s are truly important for understanding how they will respond to these threats. Her participation in the Interfaces of Global Change graduate program highlights the importance of understanding interactions between multiple threats.”

Read more at VT News


Red-winged blackbird photo credit: By John Picken from Chicago, USA via Wikimedia Commons

Categories
Climate Change Global Change News

Intergovernmental Panel on Climate Change issues starkest warning yet

From the New York Times

“The gathering risks of climate change are so profound that they could stall or even reverse generations of progress against poverty and hunger if greenhouse emissions continue at a runaway pace, according to a major new United Nations report.

Despite growing efforts in many countries to tackle the problem, the global situation is becoming more acute as developing countries join the West in burning huge amounts of fossil fuels, the Intergovernmental Panel on Climate Change said here on Sunday.

Failure to reduce emissions, the group of scientists and other experts found, could threaten society with food shortages, refugee crises, the flooding of major cities and entire island nations, mass extinction of plants and animals, and a climate so drastically altered it might become dangerous for people to work or play outside during the hottest times of the year.

Continued emission of greenhouse gases will cause further warming and long-lasting changes in all components of the climate system, increasing the likelihood of severe, pervasive and irreversible impacts for people and ecosystems,” the report found.

In the starkest language it has ever used, the expert panel made clear how far society remains from having any serious policy to limit global warming.”