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Tag: "forests" at biology news

Some good news for the world's poor

...for poor consumers, saved thousands of hectares of forests from being turned into farmland, and reduced the n... to 8 percent more food. Millions of hectares of forests and other fragile ecosystems would have been lost. Between 1.5 and 2 percent more children would ha...

Overfishing may drive endangered seabird to rely upon lower quality food

...ss of habitat, particularly the coastal old-growth forests where the bird nests," he said. "But it's possible...en remedied," said Beissinger. "Coastal old growth forests will require 50 to100 years of restoration, and prey resources haven't recovered from the sardine fi...

Genetic analysis of Asian elephants in India reveals some surprises

...ations found in India, the groups that inhabit the forests in the northeast of the country is actually composed of two genetically distinct populations separated by the Brahmaputra River. Despite the low and declining numbers of Asian elephants, relatively little is known about their genetic diversity--inf...

Why Christmas trees are not extinct

...or water. Yet conifers thrive, and they dominate forests in many regions of Earth. Hacke says the planet's tallest trees are conifers: redwoods and sequoias. So are the oldest trees, bristlecone pines. So how did conifers overcome the handicap of short pipes? Scientists already knew that the valves betwe...

'Acid rain' and forest mass: Another perspective

...e-year period stages and in two young radiata pine forests (the first stage) and in two oak woods (the second... is, or shortly will be, a fact. The canopy of the forests was able to neutralise the atmospheric deposition in an effective manner although the potential acid...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

... and their impacts on the world increase, tropical forests are changing in many different ways. Forests are ...nization of the structure and dynamics of tropical forests is already underway" writes ecologist S. Joseph Wright, "The tropics support over half of all specie...

Logging doubles threat to the Amazon, rivaling clear-cutting, study suggests

...lammable, as the shady canopy is thinned. "Logged forests are areas of extraordinary damage," Asner said. "A tree crown can be 25 meters. When you knock down a tree it causes a lot of damage in the understory. It's a debris field down there." ...

Seeing the forest and the trees

...l Science suggests that tree diversity in tropical forests plays a crucial role in determining how much carbo...ion is just one of the many services that tropical forests provide," said DeClerck. "The more ecosystem functions you look at, the more important diversity bec...

Chernobyl: The true scale of the accident

...on is undertaken. A number of measures applied to forests in affected countries and in Scandinavia have redu...rect losses due to removing agricultural lands and forests from use and the closing of agriculture and industrial facilities, and such additional costs as canc...

Tropical dry forests receive international recognition

...rmed TROPI-DRY, a research network on tropical dry forests housed in the Faculty of Science. The Inter Americ...nger one is ignored over the other." Tropical dry forests once made up 42 per cent of all forests in the tropics yet less than one per cent is protected. The ...

The ecological effects of the Chernobyl disaster

...ntation, "The distribution and cycling of 137Cs in forests of the Chernobyl exclusion zone," will focus on 13...ribution of 14C in, "The turnover of 14C carbon in forests of the Chernobyl exclusion zone." The final presentation of the session, Ronald Chesser (Texas Tech...

Birds and bats sow tropical seeds

...dispersed fruits. Birds and bats living in nearby forests will fly to the bait to eat the fruit and will likely drop seed from forest species they carried. Fruit will be available all year, so a seasonal progression of seeds from longer-living deep forest species should be carried with the bats and birds. O...

NASA satellite data provides rapid analysis of Amazon deforestation

...rest clearing, annual clear-cutting and burning of forests cover about 7,700 square miles or about the area of New Jersey. This study found a marked trend of larger and more extensive deforestation events between 2001 and 2004 in Mato Grosso State, Brazil, which was later confirmed on the ground. Informati...

Environmental lessons from tsunami as world's coastal population doubles

...t right up to the coastline. Sand dunes, mangrove forests and coral reefs helped reduce the energy of tsunam...cosystems such as coral reefs and coastal mangrove forests can adapt to change and recover from storms and floods and still provide services of protecting the ...

Retina adapts to seek the unexpected, ignore the commonplace

...mple, Meister says, in visual environments such as forests or fields of grass with many vertical elements but only rare horizontal features, the retina adjusts to suppress the routine vertical features while highlighting the singular horizontal elements. Meister and his co-authors examined neural signals in...

Researchers identify new catfish family

...abitat, which is threatened by exploitation of the forests and possible damming of the rivers it lives in. ...

Expanding forests darken the outlook for butterflies, study shows

...ssed. These factors are combining to create larger forests and smaller alpine meadows. This is bad news for b...evate their body temperatures in order to fly, and forests are generally too shady for them to travel through with quickness and ease. Parnasissus also need st...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...nce of the forest." Repeated burning of transition forests in the Amazon could cause their eventual replaceme...fires that burn through the understory of frontier forests every dry season. These areas are already slated for destruction to expand soy fields. The planned ...

Poaching, logging, and outbreaks of Ebola threaten central African gorillas and chimpanzees

...t illegal hunting, protect great apes and tropical forests from logging, and slow the spread of the Ebola virus in the region. Called the Regional Action Plan for Conservation of Chimpanzees and Gorillas in Western Equatorial Africa, the document seeks a multilateral response to the threats to populations o...

Amazon source of 5-year-old river breath

...ion-square-mile Amazon River basin ?where tropical forests rapidly gulp carbon dioxide during photosynthesis ...arbon in the rivers that came from the surrounding forests to be 40 to more than 1,000 years old," Aufdenkampe says. "They assumed that the return of this fore...

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