Tag: "tropical" at biology news
Race Plus Roaches: A Breathtaking Link
...f indoor allergen worldwide, both in temperate and tropical
climates. Although more than 60 species have been identified, the most common in North America are the German, Oriental, and American cockroaches. Cockroach allergens are known to represent an important risk factor for acute asthma, a condition that ...
Ocean Sediments Contain Record of Past Vegetation Fires in Africa
... land. Their paper, "Late Pleistocene charcoal in tropical
Atlantic deep-sea sediments: Climatic and geochemi...lyzing a core taken from the bottom of the eastern tropical
Atlantic Ocean. "It was full, much to my surprise, of a large amount of charcoal," he says. "Given...
Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...icationsfor the future of a commercially-important tropical
wood, Duke Universityecologist Laura Snook has dis...ngthe many stately mahoganies felled by loggers in tropical
forests will notbe a simple matter. While mature mahogany trees normally grow in thick woods, she h...
Gene Discovery Could Overcome Aluminum Barrier To Higher Wheat Yields Worldwide
...d studies of a taro variety called Lila. Taro is a tropical
crop that produces underground stems that are an e... variety can triple the yield of this root crop on tropical
farms because it is more efficient than other varieties in using soil nutrients. Scientists say the...
NCAR Scientists Trek To Africa For Biosphere-Atmosphere Chemistry Study
...ate of biospheric and atmospheric chemistry in the tropical
rainforest will culminate in November and December...ainforest-savanna boundaries, and the influence of tropical
vegetation on global air chemistry. This fall's field work, which begins on November 10, is the clim...
An Equal Opportunity Extinction? Cincinnati Geologists Find Global Impact from Permian Die
...me effect. Traditionally, geologists believed that tropical
areas andhigh-diversity marine environments such a...g regions. Temperateareas were hit just as hard as tropical
ones. Secondly, he looked at distinct environmental zones from nearshore to deep water. Reefs and ot...
Scientists Trek to Africa for Biosphere-Atmosphere Chemistry Study
...to date of biospheric and atmospheric chemistry in tropical
rainforests will culminate in December, when Natio...rainforest-savanna boundaries and the influence of tropical
vegetation on global air chemistry. This fall's field work, which begins on Nov. 10, is the ...
KU Researcher Eyes The Rain Forest Through The Trees
...mated that 100,000 to 165,000 square kilometers of tropical
rain forests are lost to deforestation annually - ... well plants are using carbon dioxide and water in tropical
forests that are normally inaccessible to measurement. The lab is a facility to analyze stable, or n...
Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival
...an most seabirds, masked boobies live and breed in tropical
oceans where they feed by making high-velocity dives. They also kill their own young. In a new study subjecting Darwins evolutionary theories to some of their most rigorous scientific tests to date, biologist David Anderson at Wake Forest Uni...
Scientists Discover Smallest Frog
...h foreign colleagues to carry on their work. "The tropical
forests in Cuba are even more fragile and more threatened than those in the Amazon of South America because they are so small, less than 10 percent of the island's land area," says Hedges. "They are now being cut down at an increasing rate, mainly f...
A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens
...asted volcano, in what is now Indonesia, are rich tropical
rain forests abundant with vegetation and wildlife...rained eye, the entire island looks like a mature tropical
forest, with fruit-laden fig trees, deep- buttressed trees with draped creepers, and about 300 speci...
How Dry Is The Tropical Free Troposphere? Implications For Global Warming Theory
...rporation. have shown that the low humidity of the tropical
free troposphereis playing a previously-overlooked central role in the dynamics of the atmosphere.The very low humidity in this region allows a larger portion of the infraredradiation to escape from the Earth, thereby cooling the atmosphere. Currentc...
Fossils Show British Columbia Was Once 2,000 Miles South
...s in the British Columbiarocks show no evidence of tropical
marine life, typical of Baja California. Hepoints out that the rocks were formed in the Cretaceous era when the Earth wasuniformly warm, with very little latitudinal differences in animal and plantlife. This study of fossils to confirm the a...
Captive Lemurs To Depart For Madagascar Oct. 17 For First Release Into The Wild
...red, Katz said. "They can only survive in primary tropical
rainforests. They cannot adapt to cleared land or secondary forest. They arealso among the most well-known lemurs, beautiful, striking, and vocal." The Betampona reserve especially needs new stocks of black-and-white ruffed lemurs, said Katz and Cha...
Cornell Text On International Nutrition
...a physician, expert in international nutrition and tropical
public health and former director of Cornell's Program in International Nutrition for 25 years. Intended for students of international nutrition and as a reference book for workers in agriculture, health, education and other fields who are concerne...
Biogenic Emissions Higher Than Expected Over African Savanna
...igher than expected over the African savanna (flat tropical
grasslands), while those coming from the rain fore...f the earth's atmosphere. "Africa's impact on tropical
and global air chemistry is considerable, but we haven't had good measurements until now," explains ...
Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers
...m semi-desert to cold mountain forest to low-lying tropical
habitats. "The macaques have spread to so many environments precisely because theyhave conserved many of the generalized features of the old-world monkeys,"Professor Melnick said. "As good generalists, they have filled many differenthabitats...
American Museum Of Natural History Researchers Announce Discovery Of Oldest Known Fossil Ants - 92-Million-Year-Old Fossils Found In New Jersey Amber
...subfamilyPonerinae, that are widely distributed in tropical
and subtropical areastoday. (Most of these ants today are known for their powerful stings.)The discovery of both primitive and more advanced fossil ants in92-million-year-old amber shows that the major lineages of ants arosebefore the great extincti...
Top Scientists Challenge Others: Join Biodiversity Year
...aluating coral ecosystems will train scientists in tropical
nations to monitor their own local reefs. The project is to be coordinated by DIVERSITAS, a scientific program under the auspices of UNESCO, the International Council of Scientific Unions and other scientific societies. Its mission is to promote re...
Global Warming Would Foster Spread Of Dengue Fever Into Some Temperate Regions
...gs, so that dengue virus transmission islimited to tropical
and subtropical regions. Global warming COULD increase the range of the mosquito. In addition, the time the virus must spend incubating inside the mosquito is shortened at higher temperatures. An estimated 2.5 billion people are curr...
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