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Agriculture & Environment

Earth Sciences
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Uneven Nutritional Payoffs for Marine Predators Revealed

New study finds that the nutritional value of prey within a single species can widely vary, offering key insights for food web dynamics and ecosystem change The hunt is on and a predator finally zeroes in on its prey. The animal consumes the nutritious meal and moves on to forage for its next target. But how much prey does a predator need to consume? Following a period of massive starvation among animals living along the California coast, University of California…

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Environmental Conservation

Global Flood Vulnerability to Hit 2 Billion by 2050

New UNU Institute in Germany to Advise Governments on Mitigating “Human Security” Threats

The number of people worldwide vulnerable to a devastating flood is expected to mushroom to 2 billion by 2050 due to climate change, deforestation, rising sea levels and population growth in flood-prone lands, warn experts at the United Nations University.

One billion people – one sixth of the global population, the majority of them among the world’s poorest inhabitants – are estimated t

Environmental Conservation

Ecosystem Productivity: Drought Affects All Equally

Under drought conditions, tropical forests can be as efficient at using water as desert ecosystems, researchers report When push comes to shove, all ecosystems have the same maximum rain-use efficiency, a measure of total plant growth per unit of precipitation. The finding indicates there’s an upper limit to ecosystems’ productivity, said Travis E. Huxman, a plant physiological ecologist at the University of Arizona in Tucson. He and a team of researchers calculated

Earth Sciences

Antarctic Ice Core Unveils 740,000 Years of Climate History

Secrets of the Earth’s past climate locked in a three-kilometre long Antarctic ice core are revealed this week in the journal Nature. The core from Dome C, high on East Antarctica’s plateau, contains snowfall from the last 740,000 years and is by far the oldest continuous climate record obtained from ice cores so far.

The ice has been collected in an eight year project by scientists and engineers from 10 European countries. Analysis of ice cores shows how temperature changed in the past, b

Environmental Conservation

ICES Recommends Zero Catch on Declining Cod Stocks

This Friday, scientists from ICES will release a report giving more strong advice to the European Commission and governments to reduce fishing pressure. In particular, cod stocks in the Kattegat, eastern Baltic and Norwegian coastal cod are all depleted and being overfished and ICES will advise zero catch of cod in these areas for 2005. (The report does not include cod stocks in the North Sea, Irish Sea and West of Scotland which will be assessed in the autumn.)

ICES will also recommend redu

Earth Sciences

UK Tops Tornado Frequency in Europe and US: New Research

The UK is a tornado hotspot, according to University of Leeds researchers, who have found that more than 100 tornadoes a year hit the UK – more per acre than the rest of Europe and the US.

In a Quarterly Journal of the Royal Meteorological Society paper, geographers Joseph Holden and Amy Wright argue that although there are 20-30 sightings each year, five times that number of tornadoes actually hit the UK.

Most tornadoes are not reported because they are not seen. But by modelling t

Environmental Conservation

Fingerprinting air – new breakthrough at University of Leicester

The University of Leicester has developed a new ‘air fingerprinting’ technique which can detect, in less than a minute, the ‘ingredients’ of air including that of an individual’s breath or perfume.

This technique revolutionises the speed and accuracy by which air composition can be tested and has potential applications in the environmental, industrial and medical worlds.

Scientists also believe the new development may have applications in the forensic field. For example, decomposing

Environmental Conservation

Where there’s muck . . . there’s compost and irrigation water

Waste is a life and death issue in less-developed countries, where poor rubbish collection and sanitation affects life expectancy. Expertise from the University of Leeds’ civil engineering department is helping transform lives by transferring knowledge on low-cost public sanitation.

Every year 1.8 million people die from diarrhoea, 90% of them children under five, according to the World Health Organization. The WHO says improved sanitation could bring these cases down by 37.5%. Translate tha

Environmental Conservation

Standards Link Climate Change, Biodiversity, and Poverty

Global collaboration between private sector, conservation groups and academia seek practical solutions to fight global warming while conserving biodiversity and alleviating poverty

The first ever set of standards certifying land use projects that reduce global warming while conserving the environment and alleviating poverty have been opened up for global peer review and comment by the Climate, Community & Biodiversity Alliance (CCBA).

This “multiple benefit” approach which incorpor

Earth Sciences

Continents played key role in collapse and regeneration of Earth’s early greenhouse, geologists say

If a time machine could take us back 4.6 billion years to the Earth’s birth, we’d see our sun shining 20 to 25 percent less brightly than today. Without an earthly greenhouse to trap the sun’s energy and warm the atmosphere, our world would be a spinning ball of ice. Life may never have evolved.

But life did evolve, so greenhouse gases must have been around to warm the Earth. Evidence from the geologic record indicates an abundance of the greenhouse gas carbon dioxide. Methan

Earth Sciences

Gulf Stream Migration’s Impact on Slope Sea Productivity

Situated between the continental shelf of the eastern United States and the north wall of the Gulf Stream flowing eastward from Cape Hatteras, the Slope Sea is a transition region between the productively rich coastal waters and the productively static open ocean.

In the current SeaWiFS special issue of Deep Sea Research II, University of Rhode Island oceanographers Stephanie E. Schollaert, Thomas Rossby, and James Yoder describe their four-year, NASA-funded study of the Slope Sea along the

Earth Sciences

A "Swarm" of satellites for a unique look inside the Earth

ESA PR 30-2004. ESA’s Earth Observation Programme Board has just decided which of the six Earth Explorer candidate missions, presented earlier in April at the User Consultation Meeting, will be developed and launched. Swarm, an Earth Explorer Opportunity Mission, is a constellation of satellites which will study the Earth’s magnetic field.

A further selection between the Earth Explorer Core Missions EarthCARE (Earth Clouds Aerosols and Radiation Explorer) and SPECTRA (Surface Processes and

Environmental Conservation

Corals Recover Symbiosis with Algae After Bleaching Events

Research published in Science demonstrates potential resilience of corals

Corals can develop new symbiotic relationships with algae from their environments after they’ve undergone bleaching, the process by which corals whiten as a result of environmental stress, University at Buffalo biologists report in the current issue of Science.

The research provides evidence that corals may have multiple mechanisms that facilitate recovery from bleaching induced by environmental s

Earth Sciences

Meteorite Crash Flipped Earth’s Crust, Study Reveals Insights

A devastating meteorite collision caused part of the Earth’s crust to flip inside out billions of years ago and left a dusting of a rare metal scattered on the top of the crater, says new U of T research.

The study, published in the June 3 issue of Nature, examines the devastating effects of meteorite impacts on the Earth’s evolution. Researchers from the University of Toronto and the Geological Survey of Canada studied the remains of a 250-kilometre wide crater in Sudbury, Ontari

Earth Sciences

Two dinosaurs from Africa give clues to continents’ split

Fossils support idea of lingering bridges between landmasses

The fossil skull of a wrinkle-faced, meat-eating dinosaur whose cousins lived as far away as South America and India has emerged from the African Sahara, discovered by a team led by University of Chicago paleontologist Paul Sereno. The find provides fresh information about how and when the ancient southern continents of Africa, South America and India separated.

The new species, which is 95 million years old, and a

Environmental Conservation

UVB Radiation: Key Threat to Global Amphibian Populations

The exposure of amphibians to damaging levels of ultraviolet-B radiation in sunlight is likely a significant part of global amphibian declines, researchers say, despite some recent suggestions to the contrary and a scientific controversy about what role UV-B actually plays in this crisis.

Scientists from the United States, Canada and Spain have outlined their understanding of UV-B’s biological effects on amphibians in an article in Ecology, a professional journal.

In it, they r

Environmental Conservation

Helping save Europe’s protected areas with geographic information

Creating synergy by coordinating Europe’s protected areas requires consistent and accurate information to guide decision makers and management authorities. Geographic Information Systems can meet this need but uniform data collection is difficult. Nature-GIS is helping to simplify its collection.

This IST programme-funded project is providing some of the answers to how data from so many different sources, and in so many different formats, can be made accessible to all the various interest

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