Concepts

Quantitative measurement of the relative amounts of different organic functional groups (carbonyl, aliphatic, amide, quinonic, aromatic, phenolic, polysaccharide) in soil organic matter

The difference in days between an individual's peak bloom date and the population's peak bloom date at the site

Probabilistic approach to measure spatial and temporal variability using Shannon entropy framework

A measure of per-capita mortality rate calculated as the natural logarithm of survival over time

A maximal subset of nodes in which all nodes are mutually reachable by at least k node-independent paths using only nodes in the subset.

A measure of the number of recessive alleles in the genome that would cause death when homozygous

The minimal PAR required by the plant to absorb more carbon dioxide than it is releasing, found at the x intercept of the PI curve

Body mass at specified age divided by adult body mass

A measure of high-frequency variation in tree-ring series that indicates climate responsiveness

Ratio of moss cover to vascular plant cover, used to assess relative moss dominance

Scoring system (3-6) for mammary gland development based on nipple visibility and prominence as indicator of reproductive activity

A measure directly related to the amount of energy required for microbial oxidation of a given compound, with higher NOSC values correlating to lower ΔGox and greater energy yield

Quantitative measure of how heavily rimed an ice particle is, with M = 0 meaning completely unrimed and M → 1 meaning spherical graupel

Measure of genome annotation quality based on similarity of predicted proteins to reference orthologs

A measure of the degree to which two phenological distributions overlap in time, calculated by integrating the area under both probability density curves

Standardized measure of the effect of grazers on chlorophyll as a function of invertebrate density, calculated as dynamic index DI = [ln(G/R)]/Dt

The accuracy of predictive models for estimating plant biomass using cross-validation

RUE - ANPP divided by precipitation, representing efficiency of water use for biomass production

A standardized measure of treatment effects calculated as (Vw - Vc)/(Vw + Vc) that is bounded and symmetrical around zero

An indicator of plumpness defined as 100 times the actual weight divided by the expected weight, suggesting the abundance of food available for each member of the population relative to the energy dem...

The normalized difference between a site observation and the network mean, quantifying how well a single measurement site represents larger area aerosol properties

Average time organisms spend in a given stream reach before drifting, calculated as benthic abundance divided by drift rate

Ratio of roughness (sum of squared Laplacian values) between downscaled and original resolution datasets

The proportion of true species or interaction richness that is detected in a sample, estimated using asymptotic richness estimators

Quantitative measure comparing the ratio of cached to available vegetation quality, calculated as I = (δC/δA) - 1

Objective function for spatial similarity assessment combining histogram intersection, correlation, and bias components