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Tag: "tropical" at biology news

Finding Cures For Tropical Diseases: Is Open Source An Answer?

...t. Onlyabout 1% of newly developed drugs are for tropical diseases, such asAfrican sleeping sickness and dengue fever. While patent incentiveshave driven commercial pharmaceutical companies to make Western healthcare the envy of the world, the commercial model only works ifcompanies can sell enough patented...

The secret lives of whales

...are white sperm whale. Female sperm whales feed in tropical regions while males travel globally and feed near the poles. “For example, of the roughly one million sperm whales killed by whalers in the Antarctic Ocean, only one was a female,?says Payne. Ocean Alliance is testing its samples for 30 different po...

Essential mangrove forest threatened by cryptic ecological degradation

...d socio-economically important for local people in tropical countries on all continents. Using biology, geography, hydrology, socio-economic interviews, and 18th-century history, an international team led by Dr. Farid Dahdouh-Guebas has demonstrated that in the recent past an increase in human-environment int...

New research indicates a 'troubled' greenhouse is brewing

...ring the greenhouse spike of 55 million years ago, tropical mangroves and rain forests spread as far north as England and Belgium and as far south as Tasmania and New Zealand," Retallack says. "Turtles, alligators and palm trees graced Ellesmere Island in the Canadian Arctic, which is now the treeless abode o...

Falling ants glide back to trunk to avoid dangers of forest floor

...es. "Apparently, it's fairly common among a lot of tropical canopy ants." Yanoviak, Dudley, a professor of in...ed that about 85 percent of the ants ?a widespread tropical canopy species called Cephalotes atratus ?are able to land on the tree trunk and climb back up, as c...

World's largest rainforest drying experiment completes first phase

...mount of carbon removed from the atmosphere during tropical droughts will decrease significantly. In addition,...ll turn to another future scenario for the world's tropical rainforests. Namely, how does the forest recover, or not, after prolonged drought? Although it is di...

In the migratory marathon, parasitized monarchs drop out early

...imate warming trends, combined with an increase of tropical milkweed species in milder climates, could ultimately replace the large migratory populations with smaller remnants that breed year-round and do not migrate. Study results suggest that if migration is lost from this system, remaining populations wil...

Norovirus, AIDS vaccine and Hepatitis Virus

...d that 20 to 50 percent of the people traveling to tropical areas of the world will experience traveler's diarrhea (TD). TD, defined as three or more loose stool movements in a 24-hour period, frequently results from exposure to bacterial or viral pathogens. Noroviruses (NoV's) are considered to be one of the...

Live fast, die young true for forests too

... balance changes." In productive forests, such as tropical forests growing on rich soils, the rates of both "deposits" (tree births) and "withdrawals" (tree deaths) are high. But if tree births suddenly stopped, or if tree death rates doubled, the numbers of trees in these forests would be halved in just 30 ...

Biodiversity hotspots identify conservation priorities

... recognized that hotspot ecosystems (most often in tropical forest areas) cover a small total land area yet account for a very high percentage of global biodiversity. The concept was subsequently refined by Myers and CI, most recently in 2000. "This new analysis has benefited greatly from increased collabora...

Solutions that reduce death of marine life reeled in by International Smart Gear Competition

... shrimp trawls. Trawl fishermen in India and other tropical fisheries depend on both finfish catches and shrimp catches to keep their commercial operations viable, but bycatch of juvenile fish and shrimp are of low commercial value and threaten future populations and catches. According to the U.N. Food and Ag...

Anammox bacteria produce nitrogen gas in oceans' snackbar

...t of Namibia and acts as a kind of snackbar in the tropical ocean, which is visited by many animals including giant whales. The newly discovered anammox bacteria remove ammonium from the ocean, which as a result can not be taken up anymore by other organisms. Algae and cyanobacteria only partly succeed in fix...

Africa to take it on chin again with climate change

...e Sahel during the monsoon often serve as seed for tropical storms and hurricanes in the North Atlantic. Hurrell's work does not address the possible impact of increased rains in the Sahel on future Atlantic hurricane activity. For their study, Hurrell and Hoerling examined output from computer models at NCA...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...ing operations in other vulnerable subtropical and tropical oceans, including Southeast Asia, West Africa, the Arabian Sea and the Bay of Bengal. "Now we can go back and predict which areas of the world will be vulnerable in the same way the Gulf of California is to nutrients coming off the land," Matson said...

Finding hidden invaders in a Hawaiian rain forest

...ent types of ecosystems, from desert grasslands to tropical rain forests, Carnegie's ecological remote sensing program has focused on the area as the ideal outdoor research laboratory for devising the next generation of aircraft and spacecraft observations. Now we've added a major focus on the application of ...

Stealth Worms May Improve Insect Pest Control

...ion. "We're looking at all groups of nematodes in tropical rainforests," Stock says. "We sweep from the tops of the trees all the way to the ground, searching for nematodes that are potential insect pathogens. The misconception is that they are concentrated more in temperate zones, but this is not true. We'r...

Cousin of Asian super termite invades Florida

... "The Asian subterranean termite, a major pest in tropical areas such as Brazil and the West Indies, was not ...rs say they're not sure how much farther north the tropical species can move and survive. "Four buildings in a one-square-mile area of Riviera Beach are infest...

Primates on the brink

...bus of Kenya are now restricted to tiny patches of tropical forest, leaving them vulnerable to rapid eradicati...latives are being cornered into shrinking areas of tropical forest," said CI President Russell A. Mittermeier, who also chairs the IUCN-SSC Primate Specialist G...

An (ecological) origin of species for tropical reef fish

... of speciation on land and sea. Coral reefs, like tropical forests, express an extreme of life's capacity for variation. Yet high biodiversity in tropical seas foil evolutionists' attempts to explain the splitting of one species into two on the basis of g...

Amazon symposium to address large-scale conservation

...processes that are threatening the world's largest tropical rain forest complex, and the initiatives underway that create the potential for large-scale conservation. ...

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