Ecology Comments: Summary of the ecology of the element. For animals, comments on population density, dispersal distances, home range size, annual and seasonal fluctuations in population size, nonbreeding coloniality/sociality, major predators, competitors, parasites, age-specific survival rates, and other significant ecological factors are included.

Element Description Author(s): Primary author(s) of the edition of the characterization text. Note: Usually not recorded except when substantial data has been developed.

Element Description Edition Date: Date of the edition of the characterization text (i.e., the date it was first completed, or since then, comprehensively revised). Note: Usually not recorded except when substantial data has been developed.

Element Ecology and Life History Author(s): Primary author(s) of the edition of the life history text. Note: Usually not recorded except when substantial data developed.

Element Ecology and Life History Edition Date: Date of the edition of the life history text. Note: Usually not recorded except when substantial data developed.

Element Occurrence (EO): Area of land and/or water where a species or natural community is, or was, present and has practical conservation value. For more information see Natural Heritage Methodology.

Element: Unit of natural biological diversity, representing species (or infraspecies taxa), ecological communities, ecological systems, or other non-taxonomic biological entities, such as migratory species aggregation areas. For more information see Classification.

Endemism: Code indicating the jurisdictional endemism of the element. Values include: S = state/province endemic, N = national endemic, M = multinational distribution. Additionally for animals: MSB = occurs in multiple nations, breeds in only one nation, MNB = occurs in multiple nations, breeds in multiple state/provinces of one nation, NSB = occurs in multiple subnations of only one nation, breeds in only one state/province.

Environmental Specificity Comments: Comments on the environmental specificity of the Element resulting from habitat preferences or restrictions, including the factors affecting the Environmental Specificity value at the global level.

Environmental Specificity: A code indicating the observed, inferred, or suspected environmental specificity or generality from a global (i.e., range-wide) perspective. For ecological communities or Systems, environmental specificity often refers to substrate requirements (nutrient, moisture, soil depth), specific disturbance factors, or climate (micro or meso-climate). Values include: Very Narrow, Narrow, Moderate, Broad and Unknown.

Environmental Summary: Summary of the information available on the environmental conditions associated with this Alliance, including a description of any other important aspects of the environment that affect this particular Alliance.

Estimated Number of Element Occurrences Comments: Comments on the estimated number of occurrences of the Element.

Estimated Number of Element Occurrences: Code indicating the estimated, inferred, or suspected number of extant occurrences of the Element worldwide. Values include: Z = 0, A = 1-5, B = 6-20, C = 21-80, D = 81-300, E = >300, U = Unknown

Estuarine Habitat(s): Estuarine habitat(s) where the element is found. Values include: bay/sound, river mouth/tidal river, lagoon, tidal flat/shore, herbaceous wetland, scrub-shrub wetland, forested wetland.

Excellant Viability: Description of what qualifies as an occurrence with excellent viability, taking into consideration all available knowledge, both historical and current, of the species at a particular location. For more information see Population Viability.

Exemplary Occurrence Site Name: Name of the site with the most exemplary occurrence of the association throughout its global range.

Exotic:: The species is present in the nation or subnation due to direct or indirect human intervention.