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Wetlands

Losses in the United States

1780's to 1980's

Table 2


TABLE 2
ORIGINAL WETLAND ACREAGE ESTIMATES
Comparison of Various Data Sets

                                                                Millions           Percent
                                                                of Acres          Difference
                                                                                 (this study)
_____________________________________________________________________________________________

Roe and Ayers, 1954                                                 215*               -3
_____________________________________________________________________________________________

Aquic suborder soils                                                 211               -5
(hydric) Soil Taxonomy, 1975                                     165(AK)              
_____________________________________________________________________________________________

USDA Economic Research Service                                       217               -2
_____________________________________________________________________________________________

USDA Economic Research Service, 1987
(agricultural drainage plus remaining wetlands)              109 drained               
                                                           104 remaining               -4
                                                               213 Total
_____________________________________________________________________________________________

This study (Table on Wetland Losses                                  221
in the United States)                                            170(AK)
_____________________________________________________________________________________________
*Figures are for the conterminous 48 states and do not include Alaska unless stated.
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