Ecological Functions and Services includes data describing or measuring an ecological or ecosystem process, property, or benefit to humans that is associated with habitat or biota. While many natural services are related to physical materials and energy production, this category is limited to those services and benefits that derive from ecological interactions of living organisms. Examples of processes or properties include primary productivity, secondary production, nutrient processing, biomass, biodiversity, ecological integrity, and trophic connectivity or export. Examples of services include provisioning of food; carbon storage; nutrient removal; filtration of water; and storm, wave, or flood protection. Functions and services related to biodiversity and production are included here and are further categorized and discussed below. Distributions include records of ecological processes, properties, or services at a location, obtained through direct measurement; measurement of proxies; or modeled estimates. Assessments include ecological valuation indices; calculations of yield; indices of habitat quality or biological integrity; purpose-driven, regionally-specific indicators of ecological value or condition; classifications of areas as critical to certain functions; monetization or other valuations of services; and models of benefits or values. Predictions are the results of models or projections of future distributions, values, or impacts of ecological functions or services; anticipated changes produced by natural and human processes; future projections of cumulative impacts of single or multiple stressors; scenario-testing models of loss or gain of function; and predictions of ecological or economic effects of functional changes under different management strategies. The Ecological Functions and Services category includes two sublevels, which are called out for their broad impact on other functions and services and for their frequent use in assessments.