Concepts

The ratio of dry root weight to total dry plant weight, used as an indicator of soil nutrient availability with higher values indicating nutrient-poor conditions

Statistical inference procedure that selects flattest probability distributions compatible with constraints imposed by prior knowledge

A quantitative measure of uncertainty about an outcome of a draw from a probability distribution

Preserved plant specimens that are picked in the field, pressed flat, dried and attached to archival-grade paper with relevant information recorded, then stored in climate-controlled cabinets

A metric that compares observed values to null model expectations, calculated as (observed - expected) / standard deviation of null distribution

Loss of cellular electrolytes through compromised cell membranes, used as indicator of heat stress damage

Systematic tendency for historical plant collectors to preferentially collect rare or uncommon species while avoiding common, dominant species

The distance between branch whorls on conifers, used to measure annual growth

Statistical method comparing species composition near target individuals to background composition to identify spatial associations

Standardized method for observing and counting birds at fixed locations for specified time periods

Experimental technique to remove soil microbial communities via autoclaving

Extrapolation of species richness estimates from small plots to larger spatial scales using theoretical scaling relationships