Friday, May 17, 2013

Research into carbon storage in Arctic tundra reveals unexpected insight into ecosystem resiliency

May 16, 2013 ? When UC Santa Barbara doctoral student Seeta Sistla and her adviser, environmental studies professor Josh Schimel, went north not long ago to study how long-term warming in the Arctic affects carbon storage, they had made certain assumptions.

"We expected that because of the long-term warming, we would have lost carbon stored in the soil to the atmosphere," said Schimel. The gradual warming, he explained, would accelerate decomposition on the upper layers of what would have previously been frozen or near-frozen earth, releasing the greenhouse gas into the air. Because high latitudes contain nearly half of all global soil carbon in their ancient permafrost -- permanently frozen soil -- even a few degrees' rise in temperature could be enough to release massive quantities, turning a carbon repository into a carbon emitter.

"The Arctic is the most rapidly warming biome on Earth, so understanding how permafrost soils are reacting to this change is of major concern globally," Sistla said.

To test their hypothesis, the researchers visited the longest-running climate warming study in the tundra, the U.S. Arctic Long-Term Ecological Research site at Toolik Lake in northern Alaska. This ecosystem-warming greenhouse experiment was started in 1989 to observe the effects of sustained warming on the Arctic environment.

What they initially found was typical of Arctic warming: low-lying, shallow-rooted vegetation giving way to taller plants with deeper roots; greater wood shrub dominance; and increased thaw depth. What they weren't expecting was that two decades of slow and steady warming had not changed the amounts of carbon in the soil, despite changes in vegetation and even the soil food web.

The answer to that mystery, according to Sistla, might be found in the finer workings of the ecosystem: Increased plant growth appears to have facilitated stabilizing feedbacks to soil carbon loss. Their research is published in the recent edition of the journal Nature.

"We hypothesize that net soil carbon hasn't changed after 20 years because warming-accelerated decomposition has been offset by increased carbon inputs to the soil due to a combination of increased plant growth and changing soil conditions," Sistla said.

The increased plant productivity, caused by the warmer temperatures -- on average 2 degrees Celsius in the air and 1 degree in the soil to the permafrost -- has increased plant litter inputs to the soil. Unexpectedly, the soils in the greenhouse experiment developed higher winter temperatures, while the summer warming effect declined.

"These changes reflect a complicated feedback," Sistla said. "Shrubs trap more snow than the lower-lying vegetation, creating warmer winter soil temperatures that further stimulate both decomposers and plant growth. Shrubs also increase summer shading, which appears to have reduced decomposer activity in the surface soil by reducing the greenhouse effect during the summer."

The increased plant growth and deeper thaw, meanwhile, also may have enabled increased carbon availability in the deeper mineral layer that overlies the permafrost. In fact, the researchers found the strongest biological effects of warming at depth, a "biotic awakening," with mineral soil decomposers showing more activity, along with the increased carbon stock at that level. "It's a surprising counterbalance," said Schimel. "It may be that those soil systems are not quite as vulnerable to warming as initially expected."

However, whether or not this phenomenon -- no net loss of soil carbon despite long-term warming -- is a transient phase that will eventually give way to increased decomposition activity and more carbon release, is not yet known. Future studies will include investigation into the mineral soil to determine the age of the carbon, which may in turn yield clues into how the carbon cycle is changing at depth, where the majority of tundra soil carbon is stored.

Funding for this study came from the National Science Foundation Long Term Ecological Research (LTER) Program, DOE Global Change Education Program Graduate Fellowship, a Leal Anne Kerry Mertes scholarship, and Explorer's Club.

According to Sistla and Schimel, this research paradigm validates the NSF LTER program's commitment to supporting long-term experiments, because it creates opportunities for younger scientists to observe effects and condition decades after experiments are established -- results that could not have been foreseen when the experiments were started.

Researchers participating in this study include John C. Moore and Rodney T. Simpson from Colorado State University, Fort Collins; Laura Gough from the University of Texas at Arlington; and Gaius R. Shaver from the Marine Biological Laboratory at Woods Hole, Mass.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_environment/~3/qiBTk8MTiEs/130516142700.htm

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Thursday, May 16, 2013

Google Maps updated for Android and iOS, launches this summer

May 15 (Reuters) - Post positions for the 138th running of the Preakness Stakes, to be run at Pimlico on Saturday (Post Position, Horse, Jockey, Trainer, Odds) 1. Orb, Joel Rosario, Shug McGaughey, even 2. Goldencents, Kevin Krigger, Doug O'Neill, 8-1 3. Titletown Five, Julien Leparoux, D. Wayne Lukas, 30-1 4. Departing, Brian Hernandez, Al Stall, 6-1 5. Mylute, Rosie Napravnik, Tom Amoss, 5-1 6. Oxbow, Gary Stevens, D. Wayne Lukas, 15-1 7. Will Take Charge, Mike Smith, D. Wayne Lukas, 12-1 8. Govenor Charlie, Martin Garcia, Bob Baffert, 12-1 9. ...

Source: http://news.yahoo.com/google-maps-updated-android-ios-launches-summer-183129819.html

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Jay Carney's day -- in 7 faces (Washington Post)

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Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/305816660?client_source=feed&format=rss

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Wednesday, May 15, 2013

Jolie admired for bravery in mastectomy revelation

FILE - This Feb. 26, 2012 file photo shows actress Angelina Jolie, right, and actor Brad Pitt at the 84th Academy Awards in the Hollywood section of Los Angeles. Jolie says that she has had a preventive double mastectomy after learning she carried a gene that made it extremely likely she would get breast cancer. The Oscar-winning actress and partner to Brad Pitt made the announcement in an op-ed she authored for Tuesday's New York Times under the headline, "My Medical Choice." She writes that between early February and late April she completed three months of surgical procedures to remove both breasts. (AP Photo/Amy Sancetta, file)

FILE - This Feb. 26, 2012 file photo shows actress Angelina Jolie, right, and actor Brad Pitt at the 84th Academy Awards in the Hollywood section of Los Angeles. Jolie says that she has had a preventive double mastectomy after learning she carried a gene that made it extremely likely she would get breast cancer. The Oscar-winning actress and partner to Brad Pitt made the announcement in an op-ed she authored for Tuesday's New York Times under the headline, "My Medical Choice." She writes that between early February and late April she completed three months of surgical procedures to remove both breasts. (AP Photo/Amy Sancetta, file)

FILE- In this Saturday, Dec. 3, 2011 file photo, actress Angelina Jolie poses for a portrait to promote her directorial debut of the film "In the Land of Blood and Honey" in New York. Jolie authored an op-ed for Tuesday?s May 14, 2013 New York Times where she writes that in April she finished three months of surgical procedures to remove both breasts as a preventive measure. She says she?s kept the process private but is writing about it now with hopes she can help other women. (AP Photo/Carlo Allegri, File) ITALY OUT

FILE - Actress Angelina Jolie arrives for the British Gala premiere for the film 'Salt', at a central London cinema, in this Aug. 16, 2010 file photo. Jolie authored an op-ed for Tuesday?s May 14, 2013 New York Times where she writes that in April she finished three months of surgical procedures to remove both breasts as a preventive measure. She says she?s kept the process private but is writing about it now with hopes she can help other women. (AP Photo/Joel Ryan, File)

FILE - Actress Angelina Jolie arrives for the British Gala premiere for the film 'Salt', at a central London cinema, in this Aug. 16, 2010 file photo. Jolie authored an op-ed for Tuesday?s May 14, 2013 New York Times where she writes that in April she finished three months of surgical procedures to remove both breasts as a preventive measure. She says she?s kept the process private but is writing about it now with hopes she can help other women. (AP Photo/Joel Ryan, File)

FILE - This Feb. 14, 2012 file photo shows US actress and director Angelina Jolie addressing the audience after premiere of her movie, "In the Land of Blood and Honey," in Sarajevo, Bosnia. Jolie says that she has had a preventive double mastectomy after learning she carried a gene that made it extremely likely she would get breast cancer. The Oscar-winning actress and partner to Brad Pitt made the announcement in an op-ed she authored for Tuesday's New York Times under the headline, "My Medical Choice." She writes that between early February and late April she completed three months of surgical procedures to remove both breasts. (AP Photo/Amel Emric, file)

(AP) ? "I hope that other women can benefit from my experience," Angelina Jolie wrote in a powerful op-ed article Tuesday, explaining her decision to go public with having her breasts removed to avoid cancer.

But amid the accolades for the film star's courageous revelation, doctors and genetic counselors were careful to note that her medical situation ? an inherited genetic mutation putting her at high risk of breast and ovarian cancer ? was very specific, and that her course of action made sense for only a small category of women.

Still, they hailed her bravery and said that she would surely help increase awareness ? and thus, perhaps, help save some lives.

"Having this conversation empowers us all," said Rebecca Nagy, a genetic counselor who works frequently with women who test positive for a defective version of the BRCA1 gene, as Jolie did. "It's wonderful what she's done."

In a stunning op-ed piece in the New York Times, Jolie, 37, began by speaking of her late mother, Marcheline Bertrand, who died of cancer at 56, before she was able to meet most of her grandchildren.

The actress revealed that beginning in February, she underwent three surgeries ? which she succeeded in keeping secret from the public ? in which her breasts were removed, and later replaced by implants.

"I wanted to write this to tell other women that the decision to have a mastectomy was not easy. But it is one I am very happy that I made," Jolie wrote. "My chances of developing breast cancer have dropped from 87 percent to under 5 percent. I can tell my children that they don't need to fear they will lose me to breast cancer."

The actress also hinted that she might, at some point, have her ovaries removed, saying that she had "started with the breasts" because her risk of breast cancer was higher than that for ovarian cancer. She did not say how long ago she was diagnosed with the faulty gene.

While admiring Jolie's straightforwardness, cancer surgeons and others in the medical community were quick to point out that hereditary cases of breast cancer account for only about 5 percent to 7 percent of all cases diagnosed each year. And those connected to the BRCA1 and BRCA2 genes are an even smaller group.

And so, women shouldn't just run off and get tested for those genes, said Dr. Robert Shenk, medical director of the Breast Center at the University Hospitals Case Medical Center in Cleveland.

"My worry is that people will be inappropriately tested," said Shenk. "Awareness is great, but people shouldn't just run in off the street and get a test."

Instead, he said, genetic counseling, including a close review of a patient's family history, is crucial.

Nagy, the genetic counselor, who is also president of the National Society of Genetic Counselors, agreed.

"The clues are in the family history. Has there been cancer in multiple generations?" she said. "Are there clusters of cancers, like breast and ovarian, on the same side of the family? Has the cancer been diagnosed at an early age ? under 50?"

If those factors exist, Nagy said, she conducts a thorough risk assessment with the patient. And if testing is warranted, there still needs to be some thought beforehand as to what one might do with the information.

"It might not necessarily be surgery," Nagy said. "It might be much more frequent screenings. Surgery isn't right for everyone."

That's the decision that Gabrielle Brett made ? at least initially. Brett was only 23 when she tested positive for the BRCA1 gene. She had just met her future husband, James, a month earlier. She wanted to have a family, so she waited.

But at age 29, her husband said she shouldn't wait any longer. She should have her breasts removed before they had kids, even though she wouldn't be able to nurse them. She ultimately agreed. She had the surgery and then had two children. Now 35, she is two weeks from her due date with her third.

Brett woke up in the middle of the night Tuesday, read about Jolie's article on Facebook, and excitedly woke her husband. "It's amazing to hear that someone so famous went through the same thing," she said in a telephone interview. "It makes me realize we are all on the same journey."

Brett, who lives in Shaker Heights, Ohio, also figures that Jolie went through some tough moments, however serene she sounded in her article.

"I'm sure it wasn't quite so simple," she said. "There's sadness, anger, fear. I did a lot of crying alone in the car. But once I had the surgery, I felt a huge weight come off of me. I was no longer worrying whether there was cancer growing inside me somewhere. I felt nothing but relief."

And, she said, it was crucial that she was accompanied throughout her journey by "my own Brad Pitt" ? her husband, who was there through every moment, as Jolie says partner Pitt was for her at the Pink Lotus Breast Center in southern California.

There is one part of the journey Brett has not tackled yet: removal of her ovaries. That, she said, will come a bit later, when she is 40.

Doctors stress that no one solution is right for everyone who tests positive. And even for those with a risky family history, it's not necessarily always right to test right away, they say.

"You don't necessarily want to test an 18-year-old, sending her into a panic at such a young age," said Shenk. "You might consider that she's unlikely to get cancer in her 20s. You would maybe test her later."

Another potential downside to the testing: the cost, which can reach $3,000, though it's usually covered by insurance and there are programs for women who can't afford it.

And some women might simply not be prepared for the results, said Dr. Eric Winer, head of the breast program at the Dana-Farber Cancer Institute in Boston. "Once you get the information, you have to be able to deal with it," he said.

If one does test positive, Winer stressed, it could be a reasonable solution to undergo intensive surveillance with MRI tests and mammograms. Or, some women choose to remove only their ovaries, which in pre-menopausal women seems to reduce the risk of breast cancer, too.

But in Jolie's case, Winer said, it's hard to argue with her choice of preventive surgery. "I tend to be a less-is-more doctor," said Winer. "But I do think the choice she made is a rational, reasonable one."

There is a risk, he noted, that with the actress's celebrity power, people will see her choice and think it's the only one. If they do get cancer, "most women are well-served by conservative surgery, as in a lumpectomy," with chemotherapy and/or radiation, he said.

But any risk is outweighed by Jolie's ability to promote awareness, Winer added. "The more people who ask their doctors about this, the better."

Dr. Kristi Funk, founder of the Pink Lotus Center where Jolie was treated, agreed. "We hope that the awareness she is raising around the world will save countless lives," Funk said.

Jolie's most positive influence, some say, may be in the fact that such a glamorous woman has come forward ? in great detail ? to talk about how one can lose one's breasts and still remain, well, a woman.

"I do not feel any less of a woman," Jolie wrote in her article. "I feel empowered that I made a strong choice that in no way diminishes my femininity."

That impressed Nagy, the genetic counselor. "For women, so much is tied to sexuality, to sensuality," she said. "Many women feel defined by that. So for her to be such an icon and come out and say, 'Look what I did' ? I'm hoping that prompts other women to have conversations, about their own options."

___

Associated Press writer Raquel Dillon contributed from Los Angeles.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/bbd825583c8542898e6fa7d440b9febc/Article_2013-05-14-Angelina%20Jolie-Mastectomy/id-453deabac09946fd916945c7839b9b2c

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Vt. poised to allow lethal meds for terminally ill

MONTPELIER, Vt. (AP) -- Vermont is poised to join three other states permitting doctors to prescribe lethal doses of medication to terminally ill patients after the state House approved a compromise bill similar to Oregon's 1997 law.

The bill, approved on Monday, now goes before Gov. Peter Shumlin, a strong supporter of the legislation. It marks the first time a state has granted legislative approval to such a measure.

By a 75-65 roll call vote, the House concurred with a Senate version of the bill that largely mirrors the Oregon law for three years and then shifts to a system with less government monitoring.

The vote was a reversal of the defeat of similar legislation in the House in 2007.

Critics continued to voice their concerns during House debate on Monday, while supporters, who knew they had the votes to pass the bill, were more muted.

"There is potential here for abuse of the disabled," said Rep. Carolyn Branagan, R-Georgia, "especially disabled elders," she said. "This is not medical care. It is the opposite."

Sen. Richard McCormack, D-Windsor, watched the debate from the House gallery. "This bill makes no judgment about the value of anybody's life," he said after the vote. "It makes a very positive judgment about the value of personal freedom and the right to make one's own choices."

The House vote was to concur with a hybrid bill passed 17-13 by the Senate. For the first three years, Vermont's law would closely follow the Oregon model, which allows for several safeguards, including requirements that patients state three times ? once in writing ? that they wish to die. Others include a concurring opinion from a second doctor that a patient has less than six months to live and a finding that the patient is of sound mind.

"It's an important step for terminally ill Vermont patients," Dick Walters, president of Patient Choices-Vermont, said after the vote. "It's a big step forward for the region and for the country as a whole."

If Shumlin signs the bill, Vermont would become the fourth state ? the first east of the Mississippi ? to allow doctors to help patients die by writing a prescription for a lethal dose of medication. Oregon passed the first-in-the-nation law by referendum; Washington state followed suit in 2006; and a court order in Montana made it legal in that state.

Debate included two packed Statehouse hearings in which supporters and opponents took turns voicing their views on the legislation, sometimes dubbed "death with dignity" by backers and "physician-assisted suicide" by opponents.

After July 1, 2016, Vermont would move to a model pushed by some senators who complained of too much government intervention in the Oregon system. Those changes would require less monitoring and reporting by physicians. However, there's widespread expectation that lawmakers may push to eliminate the changes set to take effect in 2016, leaving an Oregon-style law in place.

Source: http://news.yahoo.com/vt-poised-allow-lethal-meds-132749148.html

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Tuesday, May 14, 2013

Readers Write: A smart alternative to school suspensions

Letter to the Editor for the May 13, 2013 weekly print issue:?Suspensions lead to wasted educational opportunities and increasing absenteeism, truancy, and dropout rates.?A holistic approach where trained community members and counselors work with students on a one-on-one basis keeps students in school, so they have a better chance of graduating and becoming productive citizens.

By Allyson Mitchell,?Monitor reader / May 13, 2013

School suspensions: a better way

Regarding the April 1 cover story "School discipline: in search of an even hand": It is poverty and a police presence in schools that feed the school-to-prison pipeline, not racial bias.

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Although the student populations in the inner-city schools referenced in the article are predominately African-American, the more notable factor is the income disparity between these school districts and wealthier suburban districts. In places like East Oakland, Calif., where people struggle to live paycheck to paycheck, suspensions create a situation in which a parent must make the choice to take time off from work (usually unpaid) or leave a child at home unsupervised. This lack of supervision at home increases the risk of creating a situation where the child has a run-in with the law.

Multiple and long-duration suspensions lead to wasted educational opportunities, paralyzing the student's ability to make up missed assignments. In many cases this forces the student to repeat grade levels, which can cause a child to abandon all hope of graduating. Once a child feels defeated, it is not only grades that suffer. Absenteeism, truancy, and dropout rates also increase.

Many inner-city schools have become cozy with local police departments in order to display the illusion of security and safety. By bringing police into schools, discipline that was historically handled behind counselor doors is now carried out in the open with harsher punishments and the prospect of a criminal record.

Low-level, school-based offenses such as simple assault or verbal lashings do not warrant pushing our children into the criminal justice system. Curbing behavioral issues starts where students spend most of their adolescent lives: in the classroom.

The answer is a holistic approach with trained community members and counselors working with students on a one-on-one basis. By keeping students in school we have a better chance of graduating them as young adults who will become productive members of a community.

Allyson Mitchell

?Graduate student

George Mason University School for Conflict Analysis and Resolution

Arlington, Va.

Source: http://rss.csmonitor.com/~r/feeds/csm/~3/SMq4JEzLzeY/Readers-Write-A-smart-alternative-to-school-suspensions

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Using earthquake sensors to track endangered whales

May 13, 2013 ? The fin whale is the second-largest animal ever to live on Earth. It is also, paradoxically, one of the least understood. The animal's huge size and global range make its movements and behavior hard to study.

A carcass that washed up on a Seattle-area beach this spring provided a reminder that sleek fin whales, nicknamed "greyhounds of the sea," are vulnerable to collision when they strike fast-moving ships. Knowing their swimming behaviors could help vessels avoid the animals. Understanding where and what they eat could also help support the fin whale's slowly rebounding populations.

University of Washington oceanographers are addressing such questions using a growing number of seafloor seismometers, devices that record vibrations. A series of three papers published this winter in the Journal of the Acoustical Society of America interprets whale calls found in earthquake sensor data, an inexpensive and non-invasive way to monitor the whales. The studies are the first to match whale calls with fine-scale swimming behavior, providing new hints at the animals' movement and communication patterns.

The research began a decade ago as a project to monitor tremors on the Juan de Fuca Ridge, a seismically active zone more than a mile deep off the Washington coast. That was the first time UW researchers had collected an entire year's worth of seafloor seismic data.

"Over the winter months we recorded a lot of earthquakes, but we also had an awful lot of fin-whale calls," said principal investigator William Wilcock, a UW professor of oceanography. At first the fin whale calls, which at 17 to 35 vibrations per second overlap with the seismic data, "were kind of just a nuisance," he said.

In 2008 Wilcock got funding from the Office of Naval Research to study the previously discarded whale calls.

Dax Soule, a UW doctoral student in oceanography, compared the calls recorded by eight different seismometers. Previous studies have done this for just two or three animals at a time, but the UW group automated the work to analyze more than 300,000 whale calls. The method is similar to how a smartphone's GPS measures a person's location by comparing paths to different satellites. Researchers looked at the fin whale's call at the eight seismometers to calculate a position. That technique let them follow the animal's path through the instrument grid and within 10 miles of its boundaries.

Soule created 154 individual fin whale paths and discovered three categories of vocalizing whales that swam south in winter and early spring of 2003. He also found a category of rogue whales that traveled north in the early fall, moving faster than the other groups while emitting a slightly higher-pitched call.

"One idea is that these are juvenile males that don't have any reason to head south for the breeding season," Soule said. "We can't say for sure because so little is known about fin whales. To give you an idea, people don't even know how or why they make their sound."

The fin whale's call is not melodic, but that's a plus for this approach. The second-long chirp emitted roughly every 25 seconds is consistently loud and at the lower threshold of human hearing, so within range of earthquake monitoring instruments. These loud, repetitive bleeps are ideally suited for computer analysis.

Michelle Weirathmueller, a UW doctoral student in oceanography, used Soule's triangulations to determine the loudness of the call. She found the fin whale's call is surprisingly consistent at 190 decibels, which translates to 130 decibels in air -- about as loud as a jet engine.

Knowing the consistent amplitude of the fin whale's song will help Weirathmueller track whales with more widely spaced seismometer networks, in which a call is recorded by only one instrument at a time. Those include the Neptune Canada project, the U.S. cabled observatory component of the Ocean Observatories Initiative, and the huge 70-seismometer Cascadia Initiative array that's begun to detect tremors off the Pacific Northwest coast.

"We'd like to know where the fin whales are at any given time and how their presence might be linked to food availability, ocean conditions and seafloor geology," Weirathmueller said. "This is an incredibly rich dataset that can start to pull together the information we need to link the fin whales with their deep-ocean environments."

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_environment/~3/AcmL-CupTCg/130513152411.htm

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