Selective logging leads to clear-cutting in the Amazon rainforest |
Amazon | Deforestation | Rainforests |
New green building material could cut wood demand in China, India |
Green design |
NASA to study how African winds and dust influence hurricanes |
Hurricanes |
Global warming link to hurricanes challenged |
Climate Change | Hurricanes |
Biomimicry of Scorpion Venom Fights Cancer |
Biomimicry |
Primate evolution linked to global warming says new study |
Primates | Climate Change |
Coral reef parks established by locals more effective than government reserves |
Marine | Coral Reefs |
PLEASE NOTE I will be without internet access in the California Sierra Nevadas until the first of August. I will not be updating the site until I return.
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July 25, 2006
July 24, 2006
July 23, 2006
A new paper argues that bicycling may be more damaging to the environment than driving a car, but not for the reason you might think. Karl T. Ulrich, a professor at the Wharton School of the Business at the University of Pennsylvania, argues that there are environmental costs associated with increased longevity of those who engage in physical activity. Ulrich reasons that because cyclists live longer they will produce more carbon emissions over the course of their extended life.
Thursday Brazil and the U.S. renewed two Amazon forest research agreements. Brazilian Deputy Minister of Science and Technology Dr. Luis Manuel Rebelo Fernandes signed two continuation agreements for research on the Amazon: the Large-Scale Biosphere - Atmosphere Experiment in Amazonia (LBA) and Biological Determinants of Forest Fragments Program (BDFFP). Implementation of the programs will be lead by Brazil's INPA, or the Brazilian Institute for Research in the Amazon.
July 22, 2006
Thursday I spent some time in Big Basin Redwoods State Park, where we spotted a Western rattlesnake and the endangered San Francisco garter snake stalking a small mouse.
The ability to spot venomous snakes may have played a major role in the evolution of monkeys, apes and humans, according to a new hypothesis by Lynne Isbell, professor of anthropology at UC Davis.
The New York Times reports that NASA modified its mission statement in early February 2006, deleting the phrase "to understand and protect our home planet". The shift dismays some NASA scientists, who fear reduced emphasis on planetary issues like global warming.
July 21, 2006
The high diversity of leaf-eating insect species in tropical forests results from the large number of plant species that exist in these ecosystems, according to new research published in the current issue of the journal Science.
The Wall Street Journal today reported that TXU, a Dallas-based utility, is building 11 power plants that use pulverized coal. The paper notes that pulverized coal "releases substantial amounts of carbon dioxide, the most worrisome of several heat-trapping gases widely blamed for global warming." The 11 new plants would more than double the company's carbon-dioxide emissions, from 55 million tons in 2004 to more 133 million tons in 2011. The WSJ says TXU may be building the plants to take advantage of future restrictions on carbon-dioxide emissions. By building the plants, TXU could earn "allowances" based on its levels of carbon-dioxide emissions -- the higher the emissions, the larger the pollution allowances. Critics say the system essentially "rewards" firms that produce higher emissions before regulations go into effect.
July 20, 2006
The number of people living within 60 miles (100 km) of a coastline is "expected to increase by 35 percent over 1995 population levels, exposing 2.75 billion people worldwide to the effects of sea level rise and other coastal threats posed by global warming," according to a new map showing projected population change for the year 2025. The map, developed by researchers at the Center for Climate Systems Research, a part of The Earth Institute at Columbia University in New York, shows "that the greatest increases in population density through 2025 are likely to occur in areas of developing countries that are already quite densely populated," according to a release from The Earth Institute.
Economists need to play "a bigger and more constructive role in dealing with the threat of climate change" said Martin Rees, president of the Royal Society, the academy of sciences of the United Kingdom.
The most comprehensive scientific study of tiger habitats ever done finds that the big cats reside in 40 percent less habitat than they were thought to a decade ago. The tigers now occupy only 7 percent of their historic range.
July 19, 2006
July 18, 2006
As former US president Bill Clinton arrives in Liberia to meet with President Ellen Johnson Sirleaf, it's time to take a look at the state of the forests in the country. While Liberia's brutal civil war delayed the commercial exploitation of its tropical forests during the 1990s, 'conflict timber' was a key source of revenue for warring factions. The harvesting of this wood, combined with collateral damage from military operations and wildlife poaching, took a heavy toll on Liberia's forests. With the end of the war, Liberia's new government--which took power at end of the war in 1998--immediately established forestry as a national priority and instituted a five-year tax holiday on timber industries. This policy, combined with the return of commercial interests to the country, repopulation, and reconstruction efforts, has put pressure on Liberia's remaining forest resources. Since the close of the 1990s, deforestation rates have increased by 17 percent, and primary forest cover in the country has fallen to just over 1.3 percent of the total land area (or 4.1 percent of the forest cover).
Recent surveys conducted by IUCN in northern Cameroon found no evidence of the West African black rhino (Diceros bicornis longipes). The organization fears the sub-species is now extinct in the wild.
An article in The Wall Street Journal said that some Greenlanders are looking forward to climate change.
July 17, 2006
July 16, 2006
Mongabay.com contributor, Tina Butler, just returned from a trip to Iceland. Here are her pictures.
July 14, 2006
For the first time researchers have found evidence that natural exposure to a contaminant damages the brain of a wild animal. Scientists at the University of Alberta discovered that the regions in robins' brains responsible for singing and mating shrink when exposed to high levels of DDT. The new study, published in the current issue of Behavioural Brain Research, suggests that exposure to DDT can cause significant changes in the brains of songbirds.
A team of scientists from Cambridge University has found that adult meerkats directly teach their young how to obtain food. The findings which are significant because they depart from the more commonly observed behavior whereby young learn simply by observing older members of their group. Evidence of true "teaching" with the sole intent of instructing young has been rare in animal research.
July 13, 2006
July 12, 2006
July 11, 2006
Almost three quarters of Japan's tropical timber imports come from the endangered rainforests of Borneo according to figures from the International Tropical Timber Organization, an industry group. Meanwhile, ITTO says that China remains, by a large margin, the largest consumer of tropical logs.
An oil recovery technique using steam injection could add "tens of billion of barrels" to Saudi Arabia's reserves said Saudi Oil Minister Ali Naimi in an interview with The Wall Street Journal. The paper reports that earlier this year U.S.-based Chevron Corp. began a field test of a technique that could pump heavy crude oil that previously considered unrecoverable. The story shows that high oil prices will continue to drive drillers to pursue traditionally marginal sources of energy, even ones that a particularly difficult to recover and refine.
July 10, 2006
A mammal that embarks on the longest remaining overland migration in the continental United States could vanish from the ecosystem that includes Yellowstone and Grand Teton National Parks, according to a study by the Wildlife Conservation Society (WCS) and the National Park Service. The pronghorn antelope, which travels more than 400 miles between fawning grounds and wintering areas, could disappear because of continued development and human disturbance outside the parks according to the study.
The European Alps could lose 80 percent of their glacier cover by the year 2100, if summer air temperatures increase by three degrees Celsius according to a study published in Geophysical Research Letters, a journal of the American Geophysical Union. The research, based on modeling experiments by Swiss scientists, found that should in summer temperature rise more than three degree Celsius, only the largest glaciers and those on the highest mountain peaks could survive into next century.
July 9, 2006
Last week British theoretical physicist Stephen Hawking suggested that humans should colonize outer space to escape the problems we have helped create on Earth. "It is important for the human species to spread out into space for the survival of the species," said Hawking at a news conference in Hong Kong. "Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers we have not yet thought of." While Hawking may be one of the most respected and preeminent scientists in the world, his comments taken at face value seem off base, since at worst, they suggest that instead of addressing problems here on Earth, we should start over on another planet, essentially discarding our planet like a used candy wrapper or soda can.
July 8, 2006
July 7, 2006
July 6, 2006
July 5, 2006
July 4, 2006
July 3, 2006
July 1, 2006
Scientists from NASA and other agencies have concluded that the ozone hole over the Antarctic will recover around 2068, nearly 20 years later than previously believed.
In June I spent time in the East African country of Uganda, a country home to about half the world's population of critically endangered mountain gorillas. While Uganda is perhaps best known for its great apes, it is also an excellent destination for traditional safari animals including elephants, lions, and hippos. I have now posted some of my pictures of Uganda.
Carbon dioxide emissions are altering ocean chemistry and putting sea life at risk according to a report released today. Oceans worldwide absorbed approximately 118 billion metric tons of carbon between 1800 and 1994 according to the report, resulting in increased ocean acidity, which reduces the availability of carbonate ions needed for the production of calcium carbonate structures. "It is clear that seawater chemistry will change in coming decades and centuries in ways that will dramatically alter marine life," said Joan Kleypas, the report's lead author.
Two new studies paint a mixed future for the world's bird populations, one suggesting that 12 percent of existing species could be extinct by 2100 and the other finding shifts in migration patterns among birds that migrate long distances. Nevertheless, the growing body of research suggest that bird populations will likely face upheaval in coming years, with some species benefiting from climatic shifts while other flirt with extinction.
Caribbean sea temperatures have reached their annual high two months ahead of schedule according to a report from The Associated Press. Scientists are concerned that the region's coral reefs may suffer even worse damage than last year when 70 percent of coral was bleached in some areas.
Half of British consumers want to see energy inefficient products banned from the market according to a new survey by Energy Saving Trust, a UK-based non-profit organization. The group also found that more than 80 percent of people said they tried saving energy on a day-to-day basis.
I created a 52-photo slide show that provides an overview of tropical rainforests. While the show is part of the rainforest information site for kids, it is also suitable for adults with content on topics ranging from deforestation to background on individual animal species. The show includes images from my latest travels in Africa, southeast Asia, and South America.
I added some options for filtering news articles that appear on the site.
One of the two ranchers accused of killing Dorothy Stang, an American missionary who worked with the rural poor in the Amazon, has been released from prison in Brazil. Brazil's Supreme Court ruled that the rancher's pretrial imprisonment was illegal because he did not represent a threat to society. So far three men have been convicted in connection with Stang's murder.