Background - Regulations

Appendix II to Part 921-- Typology of National Estuarine Research Reserves.

This typology system reflects significant differences in estuarine characteristics that are not necessarily related to regional location. The purpose of this type of classification is to maximize ecosystem variety in the selection of national estuarine reserves. Priority will be given to important ecosystem types as yet unrepresented in the reserve system. It should be noted that any one site may represent several ecosystem types or physical characteristics.

Class I--Ecosystem Types
Group I--Shorelands
Group II--Transition Areas
Group III--Submerged Bottoms

Class II--Physical Characteristics
Group I--Geologic
Group II--Hydrographic
Group III--Chemical

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