Don't stand so close to me: A new view on how species coexist
...t is with any other species. Now we know that they coexist precisely because they each have different life histories." The London researchers assembled a simple artificial community of parasitoid wasps within a computer model, and then watched what happened over very long periods of time - up to 100,000 gene......on modern humans, archaic and modern humans had to coexist in time and space," Clayton says. What Lice Say About Theories of Human Evolution Some of the findings conflict with two major theories of human evolution the "replacement model" and "multiregional model" and instead fit best...Fungus knocks a frog down but not out, raising questions about amphibian declines
...three years, but we don't know whether these frogs coexist with the fungus during that time, or clear it and then live as normal healthy frogs. Understanding that would give us some insight into how the fungus operates in the wild." The researchers found a steady rate of infection from year to year,...Emory study details dolphin brain evolution for the first time
...t only do multiple highly encephalized delphinoids coexist in similar and overlapping environments today, but this situation arose as early as 20 million years ago, and has persisted for at least 15 million years." The study was funded by the National Science Foundation and the SETI Institute. Marino's previ...Changes in community size affect the outcome of competition
...ve feature of life. Yet, how can so many organisms coexist when some must be better competitors than others? In a study to be published in the July 2005 issue of The American Naturalist, researchers show that chance may play a role in coexistence because, although poor competitors generally lose, they may oc...For young canaries learning their song, freedom in youth gives way to rules in adulthood
...quite different. Yet in the adult bird the two can coexist side by side." "We have no idea how the brain manages to do this, but the outcome is reminiscent of people speaking two languages, like German and English, with different grammars -- not a small feat for birds."...Study explores plant phenotypic plasticity belowground
...ion"), while small, subordinate plants are able to coexist with the dominants, in part, because they exhibit greater foraging precision. In an article in the August 2005 issue of The American Naturalist, Steven Kembel and James Cahill test the validity of this foraging trade-off theory using a data set of m...Coastal retreat in face of rising sea levels found to be influenced by wildfires
...fter a fire both marsh grass and pine seedling can coexist and proliferate in burned areas. Then, if land managers prevent new wildfires for longer than 10 to 15 years, the forest may re-establish itself. "In some of those areas where fire has been suppressed, you do see forests moving back out into the mars...National Academies advisory: Fighting infectious disease
Humans coexist with millions of harmless microorganisms, but emerging diseases, resistance to antibiotics, and the threat of bioterrorism are forcing scientists to look for new ways to confront the microbes that do pose a danger. TREATING INFECTIOUS DISEASES IN A...Species take care of each other in ecological communities
...d how do hundreds, even thousands, of tree species coexist in a limited space in the tropics? He, along with Igor Volkov and Jayanth Banavar, from Pennsylvania State University, Stephen Hubbell from the University of Georgia and Amos Maritan from the Universita di Padova in Italy, offer a new theory to expl...Research: Snails were overlooked contributors to marsh destruction
... known to science as Littoraria irrorata, normally coexist happily with salt marsh. But the drought, which la...ils then eat the fungi. Periwinkle snails normally coexist happily with marsh grasses. But the drought so weakened cordgrass that it began dying off. Snails th...Invasive species harms native hardwoods by killing soil fungus
... fungi in garlic mustard's native European habitat coexist with the noxious species....Survival of the selfless - scientists find cheats don't always prosper
... own, meaning that the two different strains could coexist over the long-term without either being excluded. Lead researcher Dr Craig MacLean of Imperial College London says: "This evidence that a cooperative group can resist invasion by exploitative cheats is unexpected and gives us greater insight into how...Discovery of genetic mutation in Florida beach mice suggests extinct mammoth had light and dark fur
...people want to build beach homes and the two don't coexist well together," she adds. "The mice are now only found in protected areas, and hurricanes become a big threat because these beach mouse populations, which are so wonderfully adapted to their environment, are now small and fragmented."...Researchers seek to solve mystery of natural HIV control
... "If we could discover how these individuals can coexist with this virus without damage to their immune system and could find a way to replicate that ability in others, we would have a recipe for halting the HIV epidemic," says Bruce Walker, MD, director of Partners AIDS Research Center (PARC) at Massachus...Study: Rain forest insects eat no more tree species than temperate counterparts
...erparts. "Theory predicts that similar species coexist by dividing up resources like food and space," Weiblen said. "The unparalleled diversity of plant-eating insects in the tropics could be explained according to this theory if tropical insects were more choosy than those in temperate forests. But it h...UCR-led research team receives $5 million grant to study interaction of ecology and evolution
...-water fish biologists have studied for long that coexist in the stream with Hart's killifish, a predator. The team will examine not only what causes the guppies to evolve as they might but also the co-evolution of the killifish. "We know the fish are evolving, but the ecosystem they find themselves in is...Mode of seed dispersal greatly shapes placement of rainforest trees
... the paradox of how so many rainforest species can coexist while competing for the same resources, Plotkin and Seidler studied a 50-hectare (500 meters by 1,000 meters) plot of lowland tropical forest at Pasoh Forest Reserve in peninsular Malaysia. They analyzed the dispersal mechanisms and spatial distribut...Pendulums, predators and prey: The ecology of coupled oscillations
...wo grazers---zebras and impalas---the antelope can coexist with them, prospering when their numbers are low. ...hat appear to be exploiting the same resources can coexist and why some predator-prey systems are particularly resistant to invaders. "In the past, ecologists...Unpeaceful co-existence: How strengths and weaknesses maintain biodiversity in an ant community
...e understanding of the mechanisms by which species coexist is essential to knowing how to preserve biodiversity," adds Fred Adler. "Our quantitative approach should be useful in modeling the potential success or failure of invasive ant species," concludes Don Feener. ...