Management Information Acknowledgments: List of the people, agencies, institutions, etc. that contributed to the current version of this element management information.

Management Information Edition Author: The name(s) of the principal person(s) who prepared this edition of the management information.

Management Information Edition Date: Date of the current version of this management information (i.e., the date that this record was first completed, or since then, comprehensively revised).

Management Programs: Describes any known management programs; contact information may be provided where known.

Management Requirements: Description of the methods that are either in use, or might best be used, in monitoring this species.

Management Research Needs: Description of current management research needs for this species.

Management Research Programs: Description of any known management research programs for this species. Specifies questions being studied, methods used, and key contacts.

Mapping Guidance: Specific information on how to map occurrences of the Element.

Marine Habitat(s): Marine habitat(s) where the species is found. Values include: pelagic, abyssal, near shore, and aerial.

Maximum Percent Cover Class (Floristic Composition)
The maximum percent cover for each floristic component species identified of the designated component species in the designated stratum/lifeform of the ecological community.

Maximum Percent Cover Class (Vegetation Structure)
The maximum percent cover for each stratum/lifeform (identified in the associated Stratum and Lifeform columns) in the community.

Medium River: Perennial tributaries of big rivers (or flowing directly into other water bodies); with coarse-to-fine sediments. Riparian vegetation does not heavily dominate the community through shading and organic inputs.

Migration Comments: Comments on seasonality, direction, distances, major routes, sociality/dispersion, daily timing and variability of species movements/migration patterns over some distance.

Minimum Criteria for an Occurrence: For species, the minimum criteria that define precisely what constitutes a valid occurrence, derived from the known biology, ecology, phenology, and/or reproductive behaviors of the species. The minimum occurrence criteria for many species typically specify a single persisting, recurring, or potentially persisting or recurring individual. For some species, the minimum criteria might include a minimum required size (population and/or area) and essential characteristics of the environment that sustain or contribute to that species' survival and/or recurrence (e.g., for migratory species).

Minimum Percent Cover Class (Floristic Composition)
The minimum percent cover for each floristic component species identified of the designated component species in the designated stratum/lifeform of the ecological community.

Minimum Percent Cover Class (Vegetation Structure)
The minimum percent cover for each stratum/lifeform (identified in the associated Stratum and Lifeform columns) in the community.

Mixed Forest: Stand composed of both hardwood and conifer trees, neither dominating as much as two-thirds of the canopy. For more information see Classification of Ecological Communities.

Mixed Woodland: Stand composed of both hardwood and conifer trees, neither dominating as much as two-thirds of the canopy. For more information see Classification of Ecological Communities.

Mobility Comments: Comments on the migration/mobility of the elements, especially between nations. Specifically, on the dispersive vs. sedentary nature of the taxon, the mechanism of dispersal (e.g., passive via wind, water), flight capabilities, and variability in movement.

Moderate Gradient: Streams with a fall between 0.2 and 2 meters per kilometers; bottom sediments are a mosaic of sand, gravel, and silt.

Monitoring Programs: Description of any known monitoring programs; contact information may be provided where known.

Monitoring Requirements: Description of currently recommended monitoring procedures and needs of the species.