Tag Archives: university of oxford

MU Researcher’s Study of African Forest Elephants Helps Guide Research Efforts in the U.S.

By Guest PostJanuary 14, 2014Natureafrican continent. genotyping, african forest elephants, alfonso alonso, arkansas, biodiversity, black bears, central african, DNA, ecosystems, francisco dallmeier, gabon, genetic samples, jesus maldonado, keystone species, lori eggert, missouri, missouri rivers, movement patterns, oil drilling platforms, research efforts, rob fleischer, scbi, survival, threatened animals, university of groningen, university of missouri, university of oxford, US

Study finds that human occupation of an area may not contribute to population decline of an endangered species

COLUMBIA, Mo. – Conservation of a protected or endangered species requires frequent monitoring and the dynamic techniques biologists utilize to ensure the survival of threatened animals. Often, scientists study biodiversity at all levels—from genes to entire ecosystems. Currently, researchers at the University of Missouri are employing genotyping to study movement patterns of African forest elephants in protected and unprotected regions of Gabon to better understand how human occupation of these areas might affect elephants on the African continent. Genotyping is helping conservation biologists determine the best course of action to ensure biodiversity and the preservation of various species in the U.S. and abroad. (more…)

One Tree’s Architecture Reveals Secrets of a Forest, Study Finds

By Guest PostAugust 6, 2013Nature, Sciencebranching pattern, brian enquist, carbon dioxide, cathy hulshoff, course of evolution, ecosystem, Environment, journal ecology, leonardos rule, lisa patrick bentley, oxygen, secrets of forest, species, symmetrical y, theory, tree architecture, ua ecologists, ua ecology professor, university of arizona, university of oxford

Behind the dazzling variety of shapes and forms found in trees hides a remarkably similar architecture based on fundamental, shared principles, UA ecologists have discovered.

Researchers in the University of Arizona’s department of ecology and evolutionary biology have found that despite differences in appearance, trees across species share remarkably similar architecture and can tell scientists a lot about an entire forest.

Just by looking at a tree’s branching pattern, it turns out, scientists can gather clues about how it functions – for example how much carbon dioxide it exchanges with the atmosphere or how much water transpires through its leaves – regardless of the tree’s shape or species. (more…)

From flounders to seahorses: Evolutionary success of spiny-rayed fishes detailed

By Guest PostJuly 17, 2013Scienceacanthomorphs, ancestor, anchovies, catfish, dinosaurs, evolutionary history, evolutionary success, flounders, fossil record, genetic tools, herrings, information, life, salmon, seahorses, spiny rayed fishes, thomas near, trout, united states, university of california, university of oxford, vertebrate tree, yale university

Even as the dinosaurs were becoming extinct 66 million years ago, the ancient ancestor of spiny-rayed fishes flourished, eventually giving rise to tens of thousands of species that can now be found in home aquariums or on dinner plates. Using modern genetic tools and information from the fossil record, a team led by researchers at Yale University, University of Oxford, and University of California-Davis have constructed a detailed evolutionary history of the 18,000 species of spiny-rayed fishes existing today, a diverse group that includes basses, pufferfishes, and cichlids, and that comprises a large portion of the vertebrate tree of life.

The findings published the week of July 15 in the Proceedings of the National Academy of Sciences show surprisingly close evolutionary relationships between lineages of fish species such as tunas and seahorses, and suggest some fish lineages — like cichlids, the tiny gobies, and little-studied snailfishes — are experiencing high rates of new species origination. (more…)

Behaviour of seabirds during migration revealed

By Guest PostMay 6, 2013Natureanimal behavior, anthropogenic pressure, behaviour of seabirds, behavioural states, centre for mathematics, complex data series, computational analyses, conservation concern, environmental, environmental conditions, ethoinformatics, flight, geolocators, gps tracking, lightweight gps loggers, manx shearwater, migration, migration data, new method, patterns of foraging, puffinus puffinus, rest, robin freeman, royal society, small seabird, south america, south eastern brazil, species, tracking technologies, ucl, uk birds, university of oxford, western atlantic

The behaviour of seabirds during migration – including patterns of foraging, rest and flight – has been revealed in new detail using novel computational analyses and tracking technologies.

Using a new method called ‘ethoinformatics’, described as the application of computational methods in the investigation of animal behaviour, scientists have been able to analyse three years of migration data gathered from miniature tracking devices attached to the small seabird the Manx Shearwater (Puffinus puffinus). (more…)

Study Finds Severe Climate Jeopardizing Amazon Forest

By Guest PostJanuary 20, 2013Environment, Natureamazon basin, Amazon rainforest, amazonia, amazonian droughts, amazonian trees, atmospheric condition, california, carbon cycle, carbon dioxide, climate change, climate phenomenon, cloud, decaying wood, degradation, double whammy, drought, earth, ecosystem, effect, forest, forest canopy, forest recovery, global data, katrina, large scale, megadrought, NASA, quikscat spacecraft, radar data, rainfall measuring mission, rainforest, rainforest ecosystem, rita, sassan saatchi, satellite, satellite microwave, scatterometer radar, sea surface temperature, seawinds scatterometer, size of california, southern, steady decline, tropical, tropical atlantic, united kingdom, university of oxford, vegetation, water availability, western amazonia, wildfire, yadvinder malhi

PASADENA, Calif. – An area of the Amazon rainforest twice the size of California continues to suffer from the effects of a megadrought that began in 2005, finds a new NASA-led study. These results, together with observed recurrences of droughts every few years and associated damage to the forests in southern and western Amazonia in the past decade, suggest these rainforests may be showing the first signs of potential large-scale degradation due to climate change.

An international research team led by Sassan Saatchi of NASA’s Jet Propulsion Laboratory, Pasadena, Calif., analyzed more than a decade of satellite microwave radar data collected between 2000 and 2009 over Amazonia. The observations included measurements of rainfall from NASA’s Tropical Rainfall Measuring Mission and measurements of the moisture content and structure of the forest canopy (top layer) from the Seawinds scatterometer on NASA’s QuikScat spacecraft. (more…)

In Financial Ecosystems, Big Banks Trample Economic Habitats and Spread Fiscal Disease

By Guest PostJanuary 6, 2013Economyamerican financial sector, bank of england, banking meltdown, bill, contagion channels, diversity, ecosystem stability, effect, elephant herd, financial disease, financial environment, financial pie, financial policy adviser, financial shocks, financial system, george sugihara, global financial crisis, grassland, grazing, impact, intensity, interconnected banks, international bank, large bank, lehman brothers holdings, mathematical epidemiologist, melinda gates foundation, model, multinational banks, national, nimalan arinaminpathy, oceanography, pnas, population, potential threat, princeton university, quarantine, robert may, san diego, scripps institution, small bank, spread, sugihara, sujit kapadia, system collapsing, systemic risk tax, types of assets, typical elephant herd, united states, university of california, university of oxford, us banks, virus

Like the impact of an elephant herd grazing on grassland, multinational banks shape the financial environment to an extent that far outweighs their small number. And like a contagious person on a transnational flight, when these giant, interconnected banks succumb to financial ills, they are uniquely positioned to infect wide swaths of the financial system.

Researchers from Princeton University, the Bank of England and the University of Oxford applied methods inspired by ecosystem stability and contagion models to banking meltdowns and found that large national and international banks wield an influence and potentially destructive power that far exceeds their actual size. (more…)

Monkey See, Monkey Do: Visual Feedback Is Necessary for Imitating Facial Expressions

By Guest PostDecember 31, 2012Generalalan johnston, cecilia heyes, chameleon effect, city university london, facial expressions, facial features, facial gestures, imitate, richard cook, target expression, Technology, university college london, university of oxford, visual feedback

Research using new technology shows that our ability to imitate facial expressions depends on learning that occurs through visual feedback.

Studies of the chameleon effect confirm what salespeople, tricksters, and Lotharios have long known: Imitating another person’s postures and expressions is an important social lubricant.

But how do we learn to imitate with any accuracy when we can’t see our own facial expressions and we can’t feel the facial expressions of others? (more…)

Gene Research Sheds Light on Timing of Menopause

By Guest PostJanuary 23, 2012Healthanna murray, breast cancer, cardiovascular disease, damage, early menopause, genes, genetic studies, genome, heart disease, hormonal change, hormonal regulation, immune system, joanne murabito, john perry, kathryn lunetta, menopause, menopause onset, oestrogen exposure, post menopausal women, pre menopausal, repair, reproductive disorders, reproductive lifespan, timing of menopause, university of exeter, university of oxford

An international team of researchers has discovered 13 new regions of the genome associated with the timing of menopause.

These genes shed light on the biological pathways involved in reproductive lifespan and will provide insights into conditions connected to menopause, such as breast cancer and heart disease.

Menopause is a major hormonal change that affects most women when they are in their early 50s. The timing of menopause can have a huge impact on fertility, as well as influencing the risk of a range of common diseases such as breast cancer. It has been known for some time that genetic factors influenced the onset of menopause, however until recently very few genes had been identified.

In the new study, published in the journal Nature Genetics on 22 January 2012, Dr Anna Murray, University of Exeter, Peninsula College of Medicine and Dentistry (PCMD) Dr John Perry, PCMD and WTCHG, University of Oxford, and dozens of international collaborators, examined the genomes of over 50,000 women. They identified 13 novel gene regions associated with menopause onset, and confirmed four previously identified. Most of the 17 regions include genes related to DNA damage/repair or the immune system, whilst others are linked to hormonal regulation. (more…)