Tag Archives: North America

North American Mammal Evolution Tracks with Climate Change

By Guest PostJanuary 1, 2012Environment, Nature, Science65 million years, anthropogenic climatic change, borja figueirido, brown university, changes in climate, christine janis, climate changes, deep sea microorganisms, diversity, early middle eocene fauna, early miocene epoch, evolutionary biologists, evolutionary faunas, fossil record, future climactic changes, global paleotemperatures, herbivores, history, immigration events, jack sepkoski, juan perez claros, levels of atmospheric oxygen, life on earth, mammal species, miocene fauna, natural history, North America, paleocene fauna, paleontologist, paul palmqvist, potential connection, quantitative analysis, rise and fall, savannah, six waves of species diversity, species migrations, university of chicago, vegetation, warming and cooling periods, waves, woodland

*Climate changes profoundly influenced the rise and fall of six distinct, successive waves of mammal species diversity in North America over the last 65 million years, shows a novel statistical analysis led by Brown University evolutionary biologists. Warming and cooling periods, in two cases confounded by species migrations, marked the transition from one dominant grouping to the next.*

PROVIDENCE, R.I. [Brown University] — History often seems to happen in waves — fashion and musical tastes turn over every decade and empires give way to new ones over centuries. A similar pattern characterizes the last 65 million years of natural history in North America, where a novel quantitative analysis has identified six distinct, consecutive waves of mammal species diversity or “evolutionary faunas.” What force of history determined the destiny of these groupings? The numbers say it was typically climate change.

“Although we’ve always known in a general way that mammals respond to climatic change over time, there has been controversy as to whether this can be demonstrated in a quantitative fashion,” said Christine Janis, professor of evolutionary biology at Brown University. “We show that the rise and fall of these faunas is indeed correlated with climatic change — the rise or fall of global paleotemperatures — and also influenced by other more local perturbations such as immigration events.” (more…)

UChicago Chemist Helps Craft Message For World Leaders

By Guest PostDecember 23, 2011General, ScienceBangladesh, burundi, dmitri talapin, energy and environment, food and population, future development, Germany, global necessity, global warming, Health, Japan, kyoto, kyoto protocol, mass media, megacities, nigeria, nobel laureates, North America, nuclear safety, positive and negative aspects, reverse osmosis membrane, science and technology, scientific information, scientific research, singapore, social media, steve koppes, sts forum, sustainability, the netherlands, water shortage, young scientists

Dmitri Talapin, associate professor in chemistry, was one of 10 young scientists from around the world who delivered a message that “Scientific Research is a Global Necessity” to political, scientific and business leaders participating in the 2011 Science and Technology in Society forum last October in Kyoto, Japan.

The Japan Society for the Promotion of Science and the New York Academy of Sciences selected Talapin to represent the young scientists of North America at the STS Forum, which meets at the same venue were the Kyoto Protocol to alleviate global warming was signed in 1997. (more…)

Growing U.S. Violent Extremism – Facts on the Ground: UMD Database

By Guest PostDecember 11, 2011General, Politicsal qaida, anti abortion extremists, aqap, arabian peninsula, attacks, blueprint, community resilience, earth liberation front, elf, environmental extremists, financial schemes, foiled terrorist plots, ft hood, gary lafree, global war on terrorism, homegrown terrorists, islamist extremists, janet napolitano, lone wolf, North America, plots, political spectrum, radicalization, start, statistics, tehrik i taliban pakistan, terrorism database, terrorist attacks, texas, ttp, united states, university of maryland, violent extremism, White House, white supremacists, work of extremists

COLLEGE PARK, Md. – Over the past decade, attacks and plots by homegrown terrorists in the United States have increased, the work of extremists from across the political spectrum – roughly 40 percent of it by so-called ‘lone wolf,’ non-aligned actors – says an analysis by the National Consortium for the Study of Terrorism and Responses to Terrorism (START) based at the University of Maryland.

The statistics underscore the threat addressed in a White House plan released Thursday: Strategic Implementation Plan for Empowering Local Partners to Prevent Violent Extremism in the United States – a blueprint for “building community resilience against violent extremism.” (more…)

Examining The Changing Face of Christianity

By Guest PostNovember 28, 2011Cultureafrica, anthropologist, asia, chaplains in guatemala, charismatic christianity, China, christianity, christians, diversity, downtown toronto, Europe, faith, girish daswani, god, ju hui judy han, kevin o neill, korean missionaries, latin america, nigeria, North America, north korea, pamela klassen, pentecostal christianity, pentecostalism, politics of global christianity, rural villages, ruth marshall, simon coleman, social process, spiritual warriors, university of toronto, valentina napolitano

U of T leading centre for study of global Christianity

A century ago, 80 per cent of the world’s Christians lived in Europe and North America; today, nearly 70 per cent live in Africa, Asia, and Latin America, making Christianity a predominantly non-Western religion.

A critical mass of scholars who are looking into the implications of this shift has made the University of Toronto a leading centre for the study of global Christianity.

Christianity today has more than 2.2 billion adherents worldwide. The majority are overwhelmingly poor, displaced from rural villages into overcrowded cities in search of work, and adhere strictly to the word of Scripture, which can command their loyalty far more than state or society. (more…)

Online Banking on the Rise in Southeast Asia

By Guest PostMarch 4, 2011Technologybank mandiri, citigroup, Comscore, Europe, global banking brands, hong kong, internet growth, joe nguyen, malaysia, North America, southeast asia, vietcombank, Vietnam

*Brands with Strong Local Presence Top List as Most-Visited Online Banking Destinations*

*comScore Presents ‘The State of the Internet Southeast Asia’ *

Singapore, March 4, 2011 – comScore, Inc., a leader in measuring the digital world, today released the latest results from a study of Internet usage in Southeast Asia. The report found that an increasing number of consumers across the region turned to online banking throughout 2010. In each of the six markets included in the study (Malaysia, Hong Kong, Vietnam, Singapore, Indonesia and the Philippines), visitation to the online banking category grew by double-digits percentages, outpacing overall Internet growth by a factor of two in most cases. These results will be presented along with other key online trends via a complimentary, live webinar The State of the Internet Southeast Asia on Wednesday, March 9. For more information and to register, please visit: https://www1.gotomeeting.com/register/302171344 (more…)

Obesity Has Doubled Since 1980, Major Global Analysis of Risk Factors Reveals

By Guest PostFebruary 16, 2011Healthaustralasia, Bill and Melinda Gates foundation, blood pressure, body mass index, cholesterol, diastolic blood pressure, global problems, goodarz danaei, gretchen stevens, heart disease risk factors, high income countries, hypertension, lancet, majid ezzati, North America, obese, obesity, risk factor, southeast asia, western countries, WHO, world health organization

*Study shows western high-income countries have achieved impressive progress in lowering hypertension and cholesterol*

The worldwide prevalence of obesity has nearly doubled since 1980, according to a major study on how three important heart disease risk factors have changed across the world over the last three decades. The study, published on Feb. 4 in three papers in the Lancet, looked at all available global data to assess how body mass index, blood pressure and cholesterol changed between 1980 and 2008.

The study shows that in 2008, more than one in ten of the world’s adult population was obese, with women more likely to be obese than men. An estimated 205 million men and 297 million adult women were obese – a total of more than half a billion adults worldwide. (more…)

Online Access to the Plants of the World Is Available

By Guest PostJanuary 12, 2011Nature, Scienceafrican plants, biodiversity, digital scanner, ecologist, eldredge bermingham, Europe, flowers, global plants initiative, green tendrils, helene muller landau, herbaria, herbarium sheets, jstor, jungle, latin american, mireya correa, North America, online database, plants, pollen grains, university of panama

*The Global Plants Initiative Meets at the Smithsonian in Panama Jan. 11-13*

For centuries, jungle explorers from Europe and North America have created art of the plants they discover—pressing bright flowers and green tendrils onto herbarium sheets for prestigious museums and plant collections. But scientists in the most biodiverse countries lack easy access to this basic information needed to identify plants. The Global Plants Initiative, meeting Jan. 11-13 at the Smithsonian Tropical Research Institute in Panama, catapults biodiversity research to a new level, sharing plant collections in a massive online database of high-resolution scans. (more…)

Earth’s Lakes Warming Due to Climate Change

By Guest PostNovember 26, 2010Environmentalgal blooms, alpine lake, black, caspian seas, climate change, emerald bay, global survey, great lakes, kazakhstan, lake tahoe, lakes, lakes warming, natural ecosystem, North America, northern europe, northern hemisphere, philipp schneider, satellite data, simon hook, surface temperatures, temperature, trends

Lake Tahoe, seen here from Emerald Bay, was one of the primary validation sites for the global lake study. The lake, which straddles the borders of California and Nevada, is the largest alpine lake in North America. Image credit: NASA-JPL

WASHINGTON – In the first comprehensive global survey of temperature trends in major lakes, researchers have determined that Earth’s largest lakes have warmed during the past 25 years in response to climate change.

Philipp Schneider and Simon Hook of NASA’s Jet Propulsion Laboratory in Pasadena, Calif., used satellite data to measure the surface temperatures of 167 large lakes worldwide.

They reported an average warming rate of 0.45 degrees Celsius (0.81 degrees Fahrenheit) per decade, with some lakes warming as much as 1 degree Celsius (1.8 degrees Fahrenheit) per decade. The warming trend was global, and the greatest increases were in the mid- to high-latitudes of the Northern Hemisphere. (more…)