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Waterfowl Breeding Pair Distributions

Pond Classes

Translation of three different classifications to the system used in pair-wetland
regressions.
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                    Stewart and Kantrud     Shaw and Fredine          Cowardin et al.
                           (1971)                (1956)                   (1979)
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Temporary ponds   Class II temporary       Type 1 seasonally   Water regime temporary
                    ponds                    flooded basins
                                             and flats; Type
                                             2 inland fresh
                                             meadows

Seasonal ponds    Class III seasonal       Type 3 shallow      Water regime seasonally
                    ponds; Class VII fen     fresh marshes       flooded for wettest
                    ponds                                        mapping unit in basin

Semipermanent     Class IV semipermanent   Type 4 deep fresh   Water regime semipermanently
  ponds             ponds                    marshes             flooded for wettest        
                                                                 mapping unit in basin

Lakes             Class V permanent        Type 5 inland       System lacustrine or water
                    ponds and lakes;         freshwater          regime intermittently
                    Class VI alkali                              exposed or permanent
                    ponds and lakes
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References

Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe.  1979.  Classification of
     wetlands and deepwater habitats of the United States.  U. S. Fish Wildl. Serv.,
     FWS/OBS-79/31.  103 pp.

Shaw, S. P., and C. G. Fredine.  1956.  Wetlands of the United States.  U. S. Fish
     Wildl. Serv., Circ. 39.  67 pp.

Stewart, R. E., and H. A. Kantrud.  1971.  Classification of natural ponds and lakes
     in the glaciated prairie region.  U. S. Fish Wildl. Serv. Resour. Publ. 92.
     57 pp.