Biologists Question Animal Brain Size Theory
... were influenced by more than just sociality within the species. "This is a sophisticated and powerful analysis that integrates fossils with extant species of carnivores," Flynn, dean of the Richard Gilder Graduate School at the American Museum of Natural History, said in a museum news release. ...Early Arctic Spring Indication of Climate Change
... of researchers said . "Despite uncertainties in the magnitude of expected global warming over the next century, one consistent feature of extant and projected changes is that Arctic environments are and will be exposed to the greatest warming," said Toke T. Hoye of the National Environmental ...Will The Tropical Forests Survive The Deforestation Scenario?
... to improve conditions in tropical urban settings to encourage urbanization and preemptive conservation efforts in countries with large areas of extant forest and large projected rates of future human population growth," the authors conclude. "We hope that this first attempt inspires others to ...Repeated checking causes memory distrust
... or a real kitchen faucet (irrelevant checking) in a standardized, ritualized manner. The researchers thought of this as one way to build upon the extant work on repetition and metamemory, i.e., to conduct an experimental investigation of task repetition, memory and memory confidence in an environment ...Estimation of isolation times in the Drosophila simulans complex
... larger effective population size for the ancestral population than for extant D. simulans. "Essentially, this is about the formation of island ... and, in the case of the 4-parameter model, the ratio of ancestral to extant effective population size) from the multilocus DNA sequence data. Loci ...Dosage of fertilizer helps to enhance quality of wheat
... making, the quality is determined by its genetic configuration and the extant climatic conditions, although research undertaken to date reveal that a ... enabling the maximum yield for wheat crop, in the climatic conditions extant in Araba, is about 155 kg of nitrogen per hectare. She also pointed out ...Fossil data plugs gaps in current knowledge, study shows
... how much the family tree of life needed to be altered when data from these extant and extinct species is included or removed. They found no difference in the impact that the fossil groups made on the family tree compared to extant groups. Evolutionary biologists try to reconstruct rapid and deep ...Coralline algae in the Mediterranean lost their tropical element between 5 and 7 million years ago
... in the Sorbas basin (Almera) than in Salento (Italy). Furthermore, the main components of the coralline algae assemblages found in shallow water are extant species that are very common in the Mediterranean. Other species, such as Spongites fruticulosus and Phymatolithon calcareum, have lived in the ...Genome projects launched for three extreme-environment animals
... in China, and inhabits alpine meadow and desert regions at an altitude of 3,500-5,500 meters above sea level. The Tibetan antelope is the only extant species in the Pantholops genus. It has been evolutionarily isolated since the Himalayan orogeny, and has undergone millions of years of evolution ...February 2009 Geology and GSA Today media highlights
... layer likely corresponds to widespread and ancient clay deposits discovered by the Mars Express mission, and may constitute a favored environment for extant thermophilic ("heat-loving") organisms on Mars. Mantle weakening and strain localization: Implications for the long-term strength of the ...ASU researchers receive NIH awards for studies of malaria and emergent disease
... nonhuman primate malaria isolates, but also field isolates from human and nonhuman primate malarias in order to assess the demographic history of the extant populations, explore host-specificity, and assess putative genetic variation that may be under positive selection by the host immune system." ...Smithsonian perspective: Biodiversity in a warmer world
... with the caveat that warming in fragmented landscapes or crossing a temperature threshold could cause severe extinctions in the future. extant species that evolved in warmer climates should retain the ability to tolerate warmer climates in the future, as argued in a 2001 issue of Science by ...New 150 million-year-old crab species discovered
... these ancient crabs from the Prosopidae family existed more than 150 million years ago during the Jurassic period. Studying primitive and extant crabs helps determine various aspects of biodiversity and patterns of evolution, such as when arthropods diversified, says Dr. Carrie Schweitzer, ...First orchid fossil puts showy blooms at some 80 million years old
... dominicana, is now extinct, the scientists' analysis of the shape and configuration of its cargo of pollen places it firmly within one of five extant subfamilies of orchids. The specimen is one of just a few fossils known to illustrate directly a plant-pollinator association. The specific ...Brewing better beer: Scientists determine the genomic origins of lager yeasts
... by brewers today may not have arisen from a single hybridization event, as was previously believed. "There were two independent origins of today's extant S. pastorianus strains," said Sherlock. "It is likely that each of these groups derived the S. cerevisiae portions of their genomes from ...