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Tag: "vegetation" at biology news

A new plant-bacterial symbiotic mechanism promising for crop applications

...biotic association with bacteria can contribute to vegetation regeneration schemes on soils depleted in nitrogen owing to overexploitation, erosion or desertification. The plant cover thus formed can help achieve ecological restoration, by enriching the soils in nitrogen. However, the symbiotic processes studie...

Envisat captures first image of Sargassum from space

...ides an assessment of the amount of chlorophyll in vegetation to produce detailed images of chlorophyll per unit...otosynthesis. The amount of chlorophyll present in vegetation plays an important role in determining how healthy it is. Accurately monitoring chlorophyll from spa...

Caribbean frogs started with a single, ancient voyage on a raft from South America

... islands likely hitched a ride on floating mats of vegetation called flotsam, which is the method typically used by land animals to travel across salt water. "Some rafts of flotsam, if they are washed out of rivers during storms and caught in ocean currents, can be more than a mile across and could include pla...

Prey not hard-wired to fear predators

...irds were less abundant because moose over-browsed vegetation used by these migrants. “It is not just changes in climate or disease may alter our big remote wild landscapes, but so do the actions of conservationists and public agencies by restoring ecosystems to bring native carnivores back to where they once t...

Madagascan tropical forests return thanks to better management and well-defined ownership

...results, based on analyses of satellite images and vegetation on the ground, surprised the team of scientists from Sweden and the University of Antananarivo in Madagascar. As a result, they went further and also made a social inventory based on interviews with local forest officials and villagers. This inventor...

Leeches ferry infection among newts

...r sources often causes increased growth of aquatic vegetation in ponds, providing leeches with a firmer footing. "It could lead to more leeches and create potential hotspots of disease," Raffel noted....

Tundra disappearing at rapid rate

...ate change because they provide real evidence that vegetation change will be quite considerable in response to future warming, potentially transforming tundra landscapes into open spruce woodlands," said Danby, who will also be participating in an International Polar Year project that will be examining treeline...

How trees manage water in arid environments

...precipitation exceed evaporation enough for forest vegetation to survive. Understanding surface-atmosphere interactions is important to understanding a range of water resource phenomena including predictions about water supplies, Brown said. "This research seeks to characterize the explicit relationship betw...

The desert is dying

...borderlands, while changes in sparse but important vegetation resources within the desert core have been neglected. ...

Birth rate, competition are major players in hominid extinctions

...al opportunists," says Jablonski. "They would eat vegetation and scavenge, kill small animals and forage." Cultural adaptations helped these opportunists to take advantage of whatever food was available. But culture did not seem to help the Neandertal. Tremendously successful from about 200 to 50 thousand...

Asia's odd-ball antelope gets collared

...lost from North America and Britain as climate and vegetation shifted. With the collapse of the Soviet Empire, unregulated hunting resulted in the recent startling decrease in saiga numbers. "Although Mongolia faces stiff conservation challenges as it transitions to a free-market economy, the saiga can easil...

New evidence of early horse domestication

... one of the last places on Earth where Pleistocene vegetation survives. Because they were domesticated, the horses supplied meat year-round and vitamin-rich mare's milk from spring through fall. "No one in their right mind would try to milk a wild mare," said Olsen. There is also evidence that the Botai wer...

Study suggests evolutionary link between diet, brain size in orangutans

...s with reduced energy and protein content, such as vegetation and bark," they added. In previous studies, reported in the April 2006 issue of the Journal of Human Evolution, Taylor found evidence that orangs living in Borneo's northeast have jaws that are better able to handle tougher varieties of food than o...

Cougar predation key to ecosystem health

...t, floodplains began to erode away. Other types of vegetation and the animal species dependent on them suffered....urvey of channel dimensions, streambank condition, vegetation and species presence along each study site. "These two canyons, almost side by side, have a simila...

Plants' role in global warming re-examined

...on simulations have included differentiation among vegetation types, none have incorporated an explicit time-dependent acclimation of plant respiration to increasing temperatures. ORNL researchers also looked at the influence of temperature acclimation at both the local ecosystem and global scales. ORNL's stud...

K-Staters design and build a low-cost remote sensing tool for environmental studies

...l allow them to go out and comprehensively map the vegetation in a field-sized area, for example, one square sec...xide emitted in China, for example, can impact the vegetation in North America or Europe and vice versa. Any decisions about climate change have to be based on a ...

The vicious cycle of rainforest destruction

...of Earth System Science, Jon Lloyd: "The two major vegetation systems in the tropics are rainforest and savanna....eated to look at the impact of changes in tropical vegetation on the Earth system in terms of carbon emissions, temperature and rainfall. These changes will then ...

Plants used to detect gas leaks, from outer space!

...en. "A satellite image of the stress responses in vegetation should identify gas leaks at least as well as a visual report from a helicopter, which is the current method, and would be safer and possibly cheaper." Steven will present his research on Thursday 6th April at the Society for Experimental Biology's ...

Restoring seagrass beds: Is it for the birds?

...d by propeller damage; and much of the terrestrial vegetation on the island itself was destroyed by Hurricane Ivan in 2004. Drs. Heck and Dindo received a grant from the Gulf of Mexico Program to restore both the dune habitation and the prop-scarred grassbeds of this popular location. Dune restoration will be...

Report shows deforestation threatens Brazil's Pantanal

...agriculture has destroyed 17 percent of the native vegetation in Brazil's Pantanal, considered the world's large...nt rate would cause all of the Pantanal's original vegetation to disappear in 45 years, according to CI researchers in Brazil. Overall, opening the region to mor...

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