56 Definitions 



INDEX OF LOSS - Measure of loss of a wetland type within an ecoregion 

 expressed by the equation: 



(rY-X¥1001) X ([Y-XinOOD : or (Unit Loss x 100) x (Unit Loss x 100) 

 N Y Net National Loss 1954 Unit Base 



Where, Y = 1954Unit Base acreage per wetland type and unit area 



X = 1974 Remaining acreage per wetland type and unit area 



Y-X = Unit Loss (e.g., 1954-74 State loss per wetland type) 



N = 1954-74 Net National Loss per wetland type 



Unit = Area of comparison (e.g., ecoregion, State) 



Base = Acres of wetlands in 1954 for the unit 



INTERESTS IN WETLANDS - The financial interest in wetland 

 acquisition including, but not limited to, fee title acquisition, perpetual 

 conservation easements, deed restrictions or other methods. Adjacent 

 associated uplands essential to protecting wetland values are also 

 included. 



NATIONAL WETLANDS INVENTORY PROJECT (NWI) - A long term 

 inventory and mapping effort of the Nation's wetlands being conducted by 

 the Fish and Wildlife Service. As of 1988, approximately 55 percent of the 

 wetlands in the conterminous United States had been mapped. Mapping 

 in the conterminous United States is projected to be completed by 1998. 



NATIONAL WETLANDS PRIORITY CONSERVATION PLAN 

 (NWPCP) - The plan referenced in section 301 of the Act, established and 

 periodically updated by the Secretary of the Interior, which specifies the 

 locations and types of wetlands and interests in wetlands that should be 

 given priority consideration with respect to Federal and State acquisition. 



RARE - Wetland types that are uncommon or seldom occur in the 

 ecoregion. 



RESTORABLE WETLANDS - Wetlands having functions and values 

 diminished by human impacts that can be restored through various 

 management techniques. 



SECRETARY - The Secretary of the Department of the Interior. 



SERVICE REGIONAL WETLANDS CONCEPT PLANS (Concept Plans) - 



Wetlands Concept Plans developed by the Regional Offices of the Fish and 

 Wildlife Service to implement the NWPCP for that agency. They will be 

 prepared to address wetlands within each Service Region on a state-by- 

 state basis and will include an unranked listing of wetland sites which 

 meet the Wetlands Assessment Threshold Criteria established by the 

 NWPCP. These Concept Plans: will be prepared in cooperation with 

 various Federal and State agencies, including fish and wildlife 



