Tag: "coevolution" at biology news

Do we need a paradigm change? Disputing coevolution in herbivorous insects

...Cretaceous. Indeed, this is a text-book example of coevolution and a straightforward interpretation of the forces...strating the importance of host shifts. Hence, the coevolution hypothesis can be rejected in this case, demonstrating a different, perhaps more sophisticated princ...

'Ancestral eve' was mother of all tooth decay

...y Caucasians." Additional branches, tracing the coevolution of humans and bacteria from Asia into North and South America, will be drawn in the next phase of Caufields analysis....

New bird species found in Idaho

...ty of Wyoming, have uncovered strong evidence that coevolution has led to the formation of a species of bird new ...s to deal with these increased seed defenses. This coevolution has caused these crossbills to diverge substantially in bill morphology from other crossbills. Becau...

The floral network -- what determines who pollinates whom

...rtant role in pollinator networks, suggesting that coevolution with the most-efficient pollinator is not the sole factor governing floral evolution....

Symbiotic fungus does not depend on fungus-farming ants for reproduction, researchers say

...ationship in order to coevolve. "This shows that coevolution can proceed without specificity at the species level," said Mikheyev. "It has been believed that mutualistic interactions, as well as parasitic ones, are very specific and one-to-one. We are beginning to realize that this is not necessary for long-te...

Prevalence of infection in a population can shape parasite virulence

...leagues extend traditional methods of studying the coevolution of parasite virulence and host life history traits by introducing an additional variable: intraspecific competition between hosts. Unsurprisingly, the authors find that infected individuals pay a cost compared to their healthy counterparts. But surpr...

500 million years of errors: Brachiopod shells record shadow of arms race in ancient oceans

...utionary arms races that can lead to escalation or coevolution between assaulters and their victims. Yet, the rare opportunistic or mistaken attacks on brachiopods are not likely to have been evolutionarily important they may reflect more than 500 million years of menu selection errors," he said. "Finally, the...

How important is sexual conflict?

.... Sexual conflict can generate rapid anatagonistic coevolution between the sexes. This occurs when one sex, usually males, attempt to manipulate reproduction in the other sex, usually females, to the manipulators' benefit. If this manipulation is detrimental to females, females may go on the counteroffensive and...

Study in Royal Society journal on first evidence for magnetic field detection in sharks

...rabs with crusher claws, suggest a unique role for coevolution in this new model system for the study of adaptive radiation. In addition, highly diverse radulae (snail rasping organ) in the lakes indicates that the development of feeding specialization likely is a driving force in speciation. Contact: Dr von Rin...

Gut microbes can open gates in fat cells

...siological needs. "Over their millions of years of coevolution with us, microbes have learned to manipulate networks of human genes," Gordon says. "By defining these networks, we can learn 'new ways' to promote health." As a result of such research, physicians may one day opt to make specific changes in the mix...

Laboratory test of evolutionary theory confirms importance of links between populations

...er 14 issue of the journal Nature , looked at the coevolution of a common type of bacteria, Escherichia coli, an...oevolutionary interactions between species and how coevolution organizes biodiversity through networks of interactions across landscapes," Thompson said. "These ex...

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