Zobrazeno 1 - 10
of 16
pro vyhledávání: '"James A. Brown"'
Autor:
Kristin Kaschner, Felisa A. Smith, James H. Brown, Ara S. Winter, Brian Alfaro, John Grady, Phoebe L. Zarnetske, Brian S. Maitner, Derek P. Tittensor, Adam M. Wilson, Sydne Record, Helen J. Wearing, Anthony I. Dell
Publikováno v:
Science (New York, N.Y.). 363(6425)
Cold is better for polar predators Generally, biodiversity is higher in the tropics than at the poles. This pattern is present across taxa as diverse as plants and insects. Marine mammals and birds buck this trend, however, with more species and more
A common scaling rule for abundance, energetics, and production of parasitic and free-living species
Publikováno v:
Science (New York, N.Y.). 333(6041)
The metabolic theory of ecology uses the scaling of metabolism with body size and temperature to explain the causes and consequences of species abundance. However, the theory and its empirical tests have never simultaneously examined parasites alongs
Publikováno v:
Science (New York, N.Y.). 306(5694)
Space used by animals increases with increasing body size. Energy requirements alone can explain how population density decreases, but not the steep rate at which home range area increases. We present a general mechanistic model that predicts the fre
Autor:
Stuart L, Pimm, James H, Brown
Publikováno v:
Science (New York, N.Y.). 304(5672)
Publikováno v:
Science (New York, N.Y.). 293(5538)
We derive a general model, based on principles of biochemical kinetics and allometry, that characterizes the effects of temperature and body mass on metabolic rate. The model fits metabolic rates of microbes, ectotherms, endotherms (including those i
Publikováno v:
Science (New York, N.Y.). 293(5530)
Studies that combine experimental manipulations with long-term data collection reveal elaborate interactions among species that affect the structure and dynamics of ecosystems. Research programs in U.S. desert shrubland and pinyon-juniper woodland ha
Publikováno v:
Science (New York, N.Y.). 284(5420)
Fractal-like networks effectively endow life with an additional fourth spatial dimension. This is the origin of quarter-power scaling that is so pervasive in biology. Organisms have evolved hierarchical branching networks that terminate in size-invar
Publikováno v:
Science (New York, N.Y.). 276(5309)
Allometric scaling relations, including the 3/4 power law for metabolic rates, are characteristic of all organisms and are here derived from a general model that describes how essential materials are transported through space-filling fractal networks
Autor:
James H. Brown, Thomas J. Valone
Publikováno v:
Science (New York, N.Y.). 267(5199)
Analyses of long-term experimental data from the Chihuahuan desert revealed that species diversity of other rodents was higher on plots from which kangaroo rats (Dipodomys spp.) had been removed. The difference was due to consistently higher coloniza
Publikováno v:
Science (New York, N.Y.). 254(5033)
Phylogenetic-comparative and mutational analyses were used to elucidate the structure of the catalytically active RNA component of eubacterial ribonuclease P (RNase P). In addition to the refinement and extension of known structural elements, the ana