A 'private bandwidth' for communication in bats: Evidence from insular horseshoe bats
... sexual behaviour. Noticeably, in mainland regions where the three species occur together, some overlap does occur. Bats move long distances, so gene flow may operate between populations living in sympatry (i.e. occurring in the same areas) and allopatry (living in separate areas) with R. mehelyi, counteri...Multinational research: protecting ecology means understanding people, too
...rements is about to sweep over those U.S. agencies where long-time, experienced biologists have been studying the ecological problems for decades. More than one half of the Senior Executive Service members at the Department of the Interior, U.S. Department of Agriculture-Forest Service and the Environment...Which came first, the moth or the cactus?
... his students see happening in the Sonoran Desert, where both species thrive. Holland's models differ from traditional theory, suggesting that one mutualist may exert some control over the other's population increases, such that neither unbounded growth nor overexploitation ensue. "I have always been int...Interaction of just 2 genes governs coloration patterns in mice
...ands and dunes along the Atlantic and Gulf coasts, where they now live on white sand beaches. In the process, the beach mice's coats have become markedly lighter than that of their mainland brethren. "In nature there is a tremendous amount of variation in color patterns among organisms, ranging from leop...Features of replication suggest viruses have common themes, vulnerabilities
...a cell's membranes to create an intracellular lair where it can safely replicate its genes. The results p...f thousands of protein-lined, balloon-like pockets where it can make new copies of the viral genome while safe from surveillance and defense mechanisms of th...Gene regulation, not just genes, is what sets humans apart
...s as humans. These regulatory stretches of DNA are where proteins bind to the genome to initiate a genes function. And it is here that evolution has apparently fine-tuned the performance of genes, Wray said, resulting in the dramatic differences in the human brain. Though many studies have looked for si...X-ray images help explain limits to insect body size
...ct respiratory system. In contrast to vertebrates, where blood transports oxygen from the lung to the cell,...st pronounced in the orifices leading to the legs, where more and more of the space is taken up by tracheal tubes in larger species, said Alex Kaiser, biolog...New, more direct pathways from outside the cell-to-cell nuclei discovered
...ome and its contents can enter the cell's nucleus, where genetic information is stored and processed. The team's discovery of the existence of direct pathways between extracellular material and cell nuclei will be published on August 10, 2007 in Cell Motility and the Cytoskeleton. The team was led by Ray...Smokeless tobacco more effective than cigarettes for delivering dangerous carcinogens into the body
...tes, especially in places, like an office setting, where snuff may be acceptable while smoking is not. ...Rain forest protection works in Peru
...of the study, primarily in two areas of the jungle where the forests are accessible by roads. We found that only 1 to 2 % of this disturbance in Peru happened in natural protected areas, noted lead author Paulo Oliveira. However, there was substantial forest disturbance adjacent to areas set aside for le...Climate change and permafrost thaw alter greenhouse gas emissions in northern wetlands
...ld serve as a positive feedback to climate change, where typically warming causes changes that release more greenhouse gases, which in turn causes more warming, and more emissions, and so on, she said. But what the researchers actually found is not such a clear-cut climate story. Permafrost collap...1 of deep ocean's most turbulent areas has big impact on climate
...St. Laurent said. In the undersea mountain passage where we intentionally looked, we found turbulence levels as large as one-10th watt per cubic meter of seawater. This is a huge amount of energy when you add all the seawater in the passage, equal to around five million watts, which is comparable to output...A unique arrangement for egg cell division
...EMBL, all other cells contain two centrosomes from where the microtubules originate. They predetermine the bipolar structure of the spindle that is essential to extrude exactly half of the chromosomes outside of the egg. For a long time we did not understand how mammalian oocytes could assemble a bipolar s...Conventional plowing is 'skinning our agricultural fields'
...ery argues that there are few, if any, places left where the soil can feed a large population for very long. "We are skinning our agricultural fields," Montgomery said. "But there are methods of farming, no-till in particular, that don't have to lead to that result." No-till agriculture does away wit...Smithsonian scientists show differing patterns of rainforest biodiversity
... upland rainforests in the foothills of the Andes, where steep gradients in elevation, temperature, rainfall and other environmental factors boost diversity by creating diverse habitats within a short distance. Such change in a regions species makeup between sites is called beta diversity: some rainforests...Satellite tracking reveals threats to Borneo pygmy elephants
...f Sabah, on the northeast of the Island of Borneo where most of pygmy elephants are has been lost to logg...ese elephants need to survive are the same forests where the most intensive logging in Sabah has taken place, because flat lands and valleys incur the lowest...Edible fish feasts beats malaria
...laria cases annually in the Kisii Central District where the authors carried out their research. Nile tilapia's predilection for mosquitoes has been known since 1917. However this is the first field data published detailing this species' use for mosquito control. ...What we can learn from the biggest extinction in the history of Earth
...n. "People point to the fossil record as a place where we can learn about how our actions today may affect the future course of evolution," Payne said. "That's certainly true: The deep geologic record provides context for modern events. We may miss very important processes or underestimate the magnitude ...New technology reveals seal behavior
...xciting. This new technology has allowed us to see where the seals go and understand their behaviour in the... helps us to understand current population trends, where the animals forage and predict the availability of food under various climate change scenarios. Dr...... the soma and the distal part of the nascent axon, where it reorganized the F-actin cytoskeleton. Expression of constitutively active Pak1 disrupted morphological development of dendrites and axons; neurons did not survive past 7 DIV when Pak1 expression was silenced by RNA interference. 3. Toward an...