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Contact: Leithen MGonigle
mgonigle@zoology.ubc.ca
510-423-1334
University of British Columbia
Picky females play a critical role in the survival and diversity of species, according to a Nature study by researchers from the University of British Columbia and the International Institute for Applied Systems Analysis (IIASA) in Austria.
To date, biodiversity theories have focused on the role played by adaptations to the environment: the species best equipped to cope with a habitat would win out, while others would gradually go extinct. The new study presents the first theoretical model demonstrating that selective mating alone can promote the long-term coexistence of species such as frogs, crickets, grasshoppers and fish that share the same ecological adaptations and readily interbreed.
"The focus on ecological adaptation has failed to explain much of the biodiversity we see right before our eyes," says the study's first author Leithen M'Gonigle, a postdoctoral fellow at the University of California at Berkeley, who developed this work while a PhD candidate at UBC.
"Our model shows that species can stably coexist in the same habitat as long as two simple conditions are met. First, the distribution of resources they use must not be uniform, so that groups of females with different mate preferences can occupy different resource hotspots. Second, females must pay a cost for being choosy, through reduced survival or fecundity," says M'Gonigle.
"Resource distributions are never uniform over space, even in seemingly homogeneous habitats like grasslands and lakes," says co-author Ulf Dieckmann, leader of the Evolution and Ecology Program at IIASA.
"By being picky, females almost always suffer a cost, because they spend energy either to find a preferred mate or to avoid an undesirable one," says UBC zoologist and co-author Sarah Otto, Canada Research Chair in Theoretical and Experimental Evolution and a 2011 fellow of the John D. and Catherine T. MacArthur Foundation.
"These costs turn out to be crucial for reinforcing species boundaries," says IIASA scholar and co-author Rupert Mazzucco. "Because they prevent females with a particular preference from invading areas dominated by males they find unattractive."
Overcoming the long-held belief that species can stably coexist only if they differ in their ecological adaptations, this study is opening up new vistas on understanding and protecting the grandeur of biological diversity, according to the authors.
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AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
Contact: Leithen MGonigle
mgonigle@zoology.ubc.ca
510-423-1334
University of British Columbia
Picky females play a critical role in the survival and diversity of species, according to a Nature study by researchers from the University of British Columbia and the International Institute for Applied Systems Analysis (IIASA) in Austria.
To date, biodiversity theories have focused on the role played by adaptations to the environment: the species best equipped to cope with a habitat would win out, while others would gradually go extinct. The new study presents the first theoretical model demonstrating that selective mating alone can promote the long-term coexistence of species such as frogs, crickets, grasshoppers and fish that share the same ecological adaptations and readily interbreed.
"The focus on ecological adaptation has failed to explain much of the biodiversity we see right before our eyes," says the study's first author Leithen M'Gonigle, a postdoctoral fellow at the University of California at Berkeley, who developed this work while a PhD candidate at UBC.
"Our model shows that species can stably coexist in the same habitat as long as two simple conditions are met. First, the distribution of resources they use must not be uniform, so that groups of females with different mate preferences can occupy different resource hotspots. Second, females must pay a cost for being choosy, through reduced survival or fecundity," says M'Gonigle.
"Resource distributions are never uniform over space, even in seemingly homogeneous habitats like grasslands and lakes," says co-author Ulf Dieckmann, leader of the Evolution and Ecology Program at IIASA.
"By being picky, females almost always suffer a cost, because they spend energy either to find a preferred mate or to avoid an undesirable one," says UBC zoologist and co-author Sarah Otto, Canada Research Chair in Theoretical and Experimental Evolution and a 2011 fellow of the John D. and Catherine T. MacArthur Foundation.
"These costs turn out to be crucial for reinforcing species boundaries," says IIASA scholar and co-author Rupert Mazzucco. "Because they prevent females with a particular preference from invading areas dominated by males they find unattractive."
Overcoming the long-held belief that species can stably coexist only if they differ in their ecological adaptations, this study is opening up new vistas on understanding and protecting the grandeur of biological diversity, according to the authors.
###
?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
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ISTANBUL (Reuters) - Western and Arab nations stepped up pressure on Syrian President Bashar al-Assad on Sunday, mistrusting his acceptance of a plan to end a year of bloodshed, but were not expected to arm rebels or fully recognize an opposition council.
Opening a "Friends of Syria" conference in Istanbul, Turkish Prime Minister Tayyip Erdogan told foreign ministers and other officials from some 70 countries that the "legitimate demands of the Syrian people must be met, right here, right now".
In her prepared remarks, U.S. Secretary of State Hillary Clinton urged members of Assad's government to halt operations targeting civilians, or face "serious consequences".
She said the United States was providing communications gear and other aid to Syria's civilian opposition, and denounced Assad for failing to follow through on his agreement to a peace plan proposed by U.N.-Arab League special envoy Kofi Annan.
"Nearly a week has gone by, and we have to conclude that the regime is adding to its long list of broken promises," she said.
The United States and its Gulf Arab allies, suspecting Assad of playing for time, urged Annan on Saturday to set a timeline for "next steps" if no ceasefire materialized.
A Western diplomat said the "Friends of Syria" would declare support for Annan's mission, but stress it cannot be open-ended.
The diplomat said their communiqu? would promise additional measures to protect the Syrian people, and say the U.N. Security Council, where Russia and China have twice blocked resolutions on Syria, should play an important role in ending the conflict.
"The wording is constructively ambiguous," the diplomat said.
Violence has raged unabated despite Annan's mediation. Opposition activists reported at least 35 people killed on Sunday, many of them in clashes between the army and rebels in northwestern and eastern Syria.
Syrian media derided the Istanbul meeting, which the Baath newspaper described as "a regional and international scramble to find ways of killing more Syrians and destroying their society and country, to reach the broad goal of weakening Syria".
Around 50 Assad supporters protested outside the conference centre, waving Syrian, Russian and Chinese flags and brandishing pictures of the Syrian leader. "Allah, Syria, Bashar, that's it" and "Down, down USA" they chanted, before police removed them.
ANNAN'S PLAN
Annan will brief the U.N. Security Council on Monday on his efforts to calm a conflict in which Syrian security forces have killed more than 9,000 people, by a U.N. estimate, while rebels have killed 3,000 troops and police, according to Damascus.
His six-point plan demands that Assad order his military to cease fire, withdraw troops from cities and open daily windows for humanitarian aid, but does not require him to step down.
The rebel Free Syrian Army (FSA) said on Saturday it would stop shooting if Assad pulled heavy weaponry out of urban areas, but Damascus said its forces must stay to maintain security.
Gulf Arab countries within the "Friends of Syria" group have pushed for more support to be given to the FSA, formed to fight back after months of violent repression of unarmed protesters.
But Western countries fear strident opposition from Russia and China, which did not attend the Istanbul meeting, as well as the prospect of being sucked into an intractable conflict.
They have slapped sanctions on Syria, but these have failed so far to soften the government's crackdown on its opponents.
Wary of military intervention and unsure of the credibility of the fractious opposition Syrian National Council (SNC), Western powers have yet to discover how to unseat Assad.
Clinton urged the Syrian opposition to translate its vision for a democratic post-Assad era into a "political action plan to win support among all of Syria's communities".
SNC leader Burhan Ghalioun pressed the "Friends of Syria" to strengthen the rebel army and open humanitarian aid corridors.
He chided foreign powers and the Arab League for failing to reach a political agreement against Assad. "For this reason the Syrian regime has carried out more massacres and has been encouraged by this, but enough is enough," Ghalioun declared.
CAUTIOUS PLEA
In a separate statement, the SNC requested communications and other non-lethal equipment for the FSA, and possibly arms.
"The provision of arms is not our preferred option. We know it carries high risks of escalation into civil war but we cannot stand back and watch our people being massacred," it said.
At a reconciliation meeting in Istanbul last week, the SNC agreed to become more transparent and inclusive. Critics say the Muslim Brotherhood wields undue influence over the body, even though it is led by Ghalioun, a secular Paris-based academic.
French Foreign Minister Alain Juppe said France shared Turkey's desire for the SNC to be recognised as "the legitimate representative body of the Syrian people", but acknowledged a lack of consensus among the "Friends".
The forum was to discuss setting up a "trust fund" for the opposition, though a Western diplomat said it was not clear if nations would contribute without clarity on its purpose.
Western countries want any such funds to be used for humanitarian efforts, but doubt the need for this, given that U.N. agencies stand ready to provide relief.
The SNC wants to support the FSA's efforts to protect civilians, and pay recruits who defect from Assad's forces. Diplomats say Gulf states are ready to fund such efforts.
If Annan's plan fails, the next steps could include a return to the Security Council for a binding resolution, with increased pressure on Assad's allies Russia and China, which have endorsed Annan's mission, to get tough with Damascus.
If Annan signals progress, Council diplomats say work could start on a resolution to send 200 to 250 unarmed U.N. observers to Syria to monitor an eventual ceasefire.
In Syria, five rebels, four soldiers and a civilian were killed in fierce clashes in the town of Quriya in Deir al-Zor, the Syrian Observatory for Human Rights said.
Defectors also attacked an army convoy near the village of Janoudiya in Idlib province, close to the Turkish border, killing at least four soldiers and wounding 11, it said.
Another 21 civilians, rebels and soldiers died elsewhere, including in the southern province of Deraa, where the uprising erupted a year ago, and in Homs, where activists said government forces continued to bombard parts of the city.
The British-based Observatory said 53 people, including 10 soldiers, were killed across Syria on Saturday. The state news agency SANA said military funerals took place the same day for 20 soldiers and security men killed by "armed terrorist groups".
(Additional reporting by Dominic Evans in Beirut and Tulay Karadeniz, Seda Sezer, Jon Hemming, Simon Cameron-Moore and Daren Butler in Istanbul; Writing by Alistair Lyon; Editing by Kevin Liffey)
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These days, Cloud Computing Training is definitely an part of the enterprise popular, but numerous small businesses keep on being cloudy exactly what cloud precessing can be along with, more to the point, operate will benefit their small business. Cloud Computing Technology, or even software program as being a program, happens when IT software program along with expert services are given over the web and through a new visitor. This particular transfers the duty intended for, program upgrades, and any system concerns onto the service provider, making it possible for enterprises to focus on the primary company as an alternative to their own system. IT experts are creating the things below to consider while getting started in this clouds.
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March 31, 2012
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Tags:?Cloud, Computing, Developments, Latest, technology, Training???Posted?in:?Computers and Technology
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Founded in 1981 by Bob Hentzen and his brothers Jim (d. 1993) and Bud, their sister Nadine Pearce, and friend Jerry Tolle (d. 1995), CFCA is dedicated to the principles of Catholic social teaching. From the beginning, the founders saw sponsorship as a perfect opportunity to both provide ongoing assistance to the poor and allow the poor to share their gifts with sponsors in the United States.
CFCA sponsors and the children and elderly people they support exchange letters and photographs, building a long-distance relationship.
For Carr and Kaiser, though, long distance wasn?t enough. Like many sponsors, they decided they would meet their children in person. They left Salt Lake City Oct. 10, and returned Oct. 23.
Family celebration
Kaiser has been a CFCA sponsor for three years, supporting Sumanth Bala (8). She and Carr set out for India together, but when they reached Hyderabad, their ways separated. Carr, a member of St. Francis of Assisi Parish, traveled further south through Bangalore to a village in the Kolar gold fields where the girl she has sponsored for five years, Jaya Rakani, 15, lives.
Sumanth lives in a village outside Hyderabad. Neither child lives in a home with electricity or running water. Their American visitors stayed in nearby retreat houses and convents.
Before going to Sumanth?s home to meet him, lunch was planned at the CFCA Hyderabad office, and to Kaiser?s surprise, Sumanth and his mother came to the lunch to greet her. Later, they would travel to Sumanth?s house in a rural village in Warangal Province.
?I was amazed to find out that my visit to Sumanth had become a family celebration,? said Kaiser. ?When I arrived in the rural village with Father Gade Prakesh, the door to their house opened and 24 family members came out. I was overwhelmed.?
She said it was very strange to walk into the house and find a picture of herself hanging on the wall.
Both Carr and Kaiser were surprised that some 8,000 people were in Hyderabad to greet the Americans, most of them mothers of children who were sponsored.
?So much is done for these children and for CFCA by the mothers? groups,? Carr said. ?They had arranged lunch for us and hours of entertainment. People did so many dances for us. How they must have practiced!?
Everywhere they went, Carr said, they were mobbed by children, some who have sponsors, many who need them.
?They live in tiny homes, so spare, but neat,? added Carr.
Accountability
Kaiser said she was impressed with the annual report supplied for every sponsor, and that CFCA Hyderabad has a folder for each sponsored child. In each folder is an exact accounting of every $30 donation.
Both women spent days near the villages where their sponsored children live. They were shown the CFCA printing shop and book binding enterprise.
Carr, who teaches pre-school special education at Provo?s Farrer School, was most interested in the Indian educational system. She also saw a community center where tailoring is taught.
?The Salesian fathers and brothers do so much for the abandoned street children in Bangalore,? Carr said. ?And the Kolar gold fields used to be very profitable, but with prices what they are now, the fields are closed and the slums are very close by.?
Jaya and her mother, Carr learned, live with Jaya?s uncle in a house that has a shrine to Our Lady of Lourdes. Like Sumanth, Jaya is shy and has a beautiful smile.
After spending days with their sponsored children, the American sponsors met again in Delhi, where they saw the Taj Mahal. They shared their experiences ? Kaiser had visited a leper colony where whole families live together.
?There was so much to see when we were among the poor that I felt a little out of place at the Taj Mahal,? Kaiser said. ?It was an amazing trip, and I came home feeling closer to Sumanth. When I went there, I took him a little red fire truck that he carried everywhere he went.
?I felt a strong sense of community among the mothers,? she said.
Carr, who has spoken to groups about CFCA since she returned, is also sponsoring two more children, one in Mexico and one in Liberia.
This entry was posted on Saturday, March 31st, 2012 at 5:07 am and is filed under Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.
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