A5000140640- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Forest ecology and management
- Global Energy and Sustainability Research
- Child Development and Digital Technology
- Mitochondrial Function and Pathology
- Heavy Metal Exposure and Toxicity
- Trace Elements in Health
- Plant Water Relations and Carbon Dynamics
- ATP Synthase and ATPases Research
- Sustainable Development and Environmental Policy
- Land Use and Ecosystem Services
- Remote Sensing and LiDAR Applications
- Electrochemical Analysis and Applications
- Climate Change Policy and Economics
- Chemical Reaction Mechanisms
- Environmental, Ecological, and Cultural Studies
- Political Economy and Marxism
- Sustainability and Ecological Systems Analysis
- Food Waste Reduction and Sustainability
- Light effects on plants
- Forest Management and Policy
- Biochemical and Molecular Research
- ICT in Developing Communities
University of North Dakota
2019
Oregon State University
2015
University of New Mexico
2012-2014
University of Arizona
2012
Cornell University
2009-2011
University of Rochester
2003-2005
University of Rochester Medical Center
1998
Human societies have always faced temporal and spatial fluctuations in food availability. The length of time that remains edible nutritious depends on temperature, moisture, other factors affect the growth rates organisms cause spoilage. Some storage techniques, such as drying, salting, smoking, date back to ancient hunter–gatherer early agricultural use relatively low energy inputs. Newer technologies developed since industrial revolution, canning compressed-gas refrigeration, require much...
There is general agreement that competition for resources results in a tradeoff between plant mass, M , and density, but the mathematical form of resulting thinning relationship mechanisms generate it are debated. Here, we evaluate two complementary models, one based on space-filling properties canopy geometry other metabolic basis resource use. For densely packed stands, both models predict density scales as −3/4 energy use 0 total biomass 1/4 . Compilation analysis data from 183...
Most biological processes are temperature dependent. To quantify the dependence of biotic interactions and evaluate predictions metabolic theory, we: 1) compiled a database 81 studies that provided 112 measures rates herbivory, predation, parasitism, parasitoidy, or competition between two species at more temperatures; 2) analyzed these in framework ecology to test our prediction “activation energy,” E , centers around 0.65 eV. We focused on assessed associated times entire interactions,...
Abstract Excess brain manganese can produce toxicity with symptoms that resemble those of Parkinsonism and causes remain elusive. Manganese accumulates in mitochondria, a major source superoxide, which oxidize Mn 2+ to the powerful oxidizing agent 3+ . Oxidation important cell components by has been suggested as cause toxic effects manganese. Determining oxidation states intramitochondrial could help identify dominant mechanism toxicity. Using X‐ray absorbance near edge structure (XANES)...
Coordination of the Mg2+ ion in Mg-nucleotide substrates by amino acid residue side chains catalytic site Escherichia coli F1-ATPase was investigated. From X-ray structure mitochondrial enzyme [Abrahams, J. P., Leslie, A. G. W., Lutter, R., and Walker, E. (1994) Nature 370, 621-628], it may be inferred that hydroxyl betaThr-156 is a direct ligand Mg2+, whereas carboxyls betaGlu-181, betaGlu-185, betaAsp-242 might contribute via intervening water molecules. Elimination each respective...
Premise of research. Workers have relied on fitting a straight line to logarithmically transformed data determine biological scaling relationships without testing the assumption that error is normal and additive logarithmic scale.Methodology. We review history this practice, pros cons log transformation, use model Type I II regression protocols. Using standard statistical protocols Akaike Information Criterion, we then evaluate linear nonlinear models applied large interspecific set smaller...
The scaling equation, Y1 = Y2, has been used empirically and explored theoretically primarily to determine the numerical value meaning of exponent, . mathematical interpretation is clear –– it quotient relative rate change with respect Y2. In contrast, normalization constant, , obscure, so much that some workers have rejected idea any biological importance. With notable exception Steven J. Gould's early work, Huxley's dismissal largely relegated study its role an academic...
Summary Physical laws influence the ability of plants to exchange energy and mass with their external environments, which is influenced by size spatiotemporal display surface area. In turn, energy–mass rates affect plant growth thus consumption resources competitiveness. Representative physical processes are reviewed, empirical data computer models used elaborate on how rates, competitiveness interconnected. Our review shows that biophysical constraints significantly plant–plant competition....
A spatially explicit, reiterative algorithm (SERA) is presented and used to predict multiple aspects of plant population community dynamics. Using simple physical principles empirically derived relationships, SERA provides an analytical venue test alternative hypotheses about individual functional traits governing ecological or evolutionary processes at the level complexity. Our analyses show that, as a result competition for light space, individual-level features scale up produce species...
The Neutral Biodiversity Theory (NBT) argues that community-level patterns are not determined by trait differences among species, but rather demographic stochasticity. If true, deterministic of species co-existence, transient or otherwise, should occur. We tested this critical prediction using a spatially explicit, reiterative algorithm (SERA) incorporates stochasticity to examine how artificial plant compete for light and space. An additional level ecological realism was added simulating...
Novel tryptophan substitutions, surrounding the nucleotide bound in catalytic sites, were introduced into Escherichia coli F1-ATPase. The mutant enzymes purified and studied by fluorescence spectroscopy. One cluster of Trp consisting β-Trp-404, β-Trp-410, β-Asp-158 (lining adenine-binding pocket), β-Trp-153 (close to α/β-phosphates), showed same responses MgADP, MgAMPPNP, MgATP binding pattern with MgADP one site higher two sites lower affinity. Therefore, absence turnover (and γ-subunit...
An overarching but vigorously debated plant model proposed by the West, Brown, Enquist (WBE) theory predicts scaling relationships for numerous botanical phenomena. However, few studies have evaluated this model's basic assumptions, one of which is that natural selection has resulted in hierarchal networks minimize energy required to distribute nutrients internally and thus produced highly efficient organisms.If these core assumptions are correct, an "idealized" complying with all emerging...
Individual trees have been shown to exhibit strong relationships between DBH, height and volume. Often such studies are cited as justification for forest volume or standing biomass estimation through remote sensing. With resolution of common satellite sensing systems generally too low resolve individuals, a need larger coverage, these rely on descriptive heights, which account tree collections in forests. For allometric applications, this is not entirely understood terms its location. Here,...
Computer models are used by ecologists for studying a broad range of research questions, from long-term forest dynamics to the functional traits that theoretically give one species an advantage over others. Despite their increasing popularity, these have been criticized simulating complex biological phenomena, involving numerous biotic and abiotic variables, using seemingly overly simplistic computational approaches. In this article, we review usefulness limitations spatially explicit...
Individual trees have been shown to exhibit strong relationships between DBH, height and volume.Often such studies are cited as justification for forest volume or standing biomass estimation through remote sensing.With resolution of common satellite sensing systems generally too low resolve individuals, a need larger coverage, these rely on descriptive heights, which account tree collections in forests.For allometric applications, this is not entirely understood terms its location.Here,...