Body mass of late Quaternary mammals
- F. Smith, S. K. Lyons, J. Haskell
- Environmental Science, Biology
- 1 December 2003
The purpose of this data set was to compile body mass information for all mammals on Earth so that we could investigate the patterns of body mass seen across geographic and taxonomic space and…
The Effect of Energy and Seasonality on Avian Species Richness and Community Composition
- A. Hurlbert, J. Haskell
- Environmental ScienceAmerican Naturalist
- 30 December 2002
The relationship between avian richness and NDVI was consistent between seasons, suggesting that the way in which available energy is converted to bird species is similar at these ecologically distinct times of year.
Fractal geometry predicts varying body size scaling relationships for mammal and bird home ranges
- J. Haskell, M. Ritchie, H. Olff
- Environmental ScienceNature
- 1 August 2002
A new model of home range–body size scaling based on fractal resource distributions, in which resource encounter rates are a function of body size, is presented.
Similarity of Mammalian Body Size across the Taxonomic Hierarchy and across Space and Time
- F. Smith, James H. Brown, M. Willig
- Environmental Science, BiologyAmerican Naturalist
- 19 April 2004
It is suspected that life‐history and ecological parameters are so tightly constrained by allometry at diminutive size that animals can only adapt to novel ecological conditions by modifying body size, and body size patterns across the body size spectrum are consistent across the size spectrum.
Thermodynamic and metabolic effects on the scaling of production and population energy use
- S. Ernest, B. Enquist, B. Tiffney
- Environmental Science, Biology
- 1 November 2003
Temperature-corrected rates of individual-level biomass production show the same body-size dependence across a wide range of aerobic eukaryotes, from unicellular organisms to mammals and vascular plants, as well as other important factors constraining ecological structure and dynamics.
General patterns of taxonomic and biomass partitioning in extant and fossil plant communities
- B. Enquist, J. Haskell, B. Tiffney
- Environmental ScienceNature
- 10 October 2002
It is found that local communities are characterized by fewer higher taxa than would be expected by chance, and changes in local diversity are accompanied by regular changes in the partitioning of community biomass between taxa that are also described by a power function.
The Value to Herbivores of Plant Physical and Chemical Diversity in Time and Space
- F. Provenza, J. Villalba, J. Haskell, J. MacAdam, T. Griggs, R. Wiedmeier
- Environmental Science
- 2007
Eating a variety of foods is how animals cope with, and may benefit from, secondary compounds and much remains to be learned about how to reconstruct agro-ecosystems with plants that complement and enhance one another structurally, functionally, and biochemically.
Regulation of diversity: maintenance of species richness in changing environments
- James H. Brown, S. Ernest, Jennifer M. Parody, J. Haskell
- Environmental ScienceOecologia
- 1 February 2001
Three data sets on long-term trends in taxonomic richness and composition are examined and suggest that while species composition may be highly variable and change substantially in response to environmental change, species diversity is an emergent property of ecosystems that is often maintained within narrow limits.
Similarities in body size distributions of small-bodied flying vertebrates
- B. A. Maurer, James H. Brown, M. Willig
- Biology
- 1 October 2004
There is evidence that functional constraints influence similarities in body mass distributions among species of distantly related taxa.
The latitudinal gradient of diversity through the Holocene as recorded by fossil pollen in Europe
- J. Haskell
- Environmental Science
- 2001
The lack of change both in richness at individual sites and in the latitudinal diversity gradient through time suggest that the ecological and evolutionary processes that regulate diversity within local communities operate in a systematic fashion across large spatial and temporal scales.
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