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Slide1: 

Interagency Briefing December 2000

Introduction: 

Introduction Congressional Mandate: The Emergency Wetlands Resources Act of 1986 Third National Report: Prior wetlands reports for the 1950s to 1970s, and the 1970s to 1980s Approach: Statistically rigorous sampling and use of contemporary imagery Wetlands Status and Trends 2000

Study Improvements: 

Study Improvements Added more sample plots to total 4375 Used imagery with a mean date of 1997 Field verified 21 percent of all plots All wetlands data now in digital format Interagency involvement in the study, field work, and report Wetlands Status and Trends 2000

Imagery Dates: 

Imagery Dates Mean date of 1997 Wetlands Status and Trends 2000 1996 1997 1998 1999

Field Verification: 

Field Verification 21 percent of sample plots were field verified in parts of 35 states Wetlands Status and Trends 2000

Digital Format: 

Digital Format Improved geographic information system capability Wetlands Status and Trends 2000

Interagency Involvement: 

Interagency Involvement Wetlands Status and Trends 2000

Major Findings: 

Major Findings Estimated 105.5 million acres of wetlands in the lower 48 States Estimated wetland loss rate is 58,500 acres annually Wetlands losses were attributed to: 30 percent Urban Development 26 percent Agriculture 23 percent Silviculture 21 percent Rural Development Wetlands Status and Trends 2000

Major Findings: 

Major Findings Wetlands status in 1997 Wetlands Status and Trends 2000 Total Wetlands Estuarine 5% Estuarine Wetlands Flats / Beaches 13% Shrubs 13% Shrubs 18% Forested 51% Ponds 6% Emergents 25% Emergents 74% Freshwater Wetlands

Major Findings: 

Major Findings Estimated rate of loss Wetlands Status and Trends 2000 458,000 290,000 58,500 Average annual net wetland loss for the conterminous United States Acres 1950s – 70s 1980s – 90s 1970s – 80s

Major Findings: 

Major Findings Wetland conversions and losses – forested wetland changes Wetlands Status and Trends 2000 Acres

Major Findings: 

Major Findings Attribution of losses Wetlands Status and Trends 2000

Major Findings: 

Major Findings Long-term trends – freshwater wetlands Wetlands Status and Trends 2000 Freshwater Forested Freshwater Shrub Freshwater Emergent

Major Findings: 

Major Findings Wetland restoration and creation Wetlands Status and Trends 2000

Summary: 

Summary Wetlands Status and Trends 2000 The wetland loss rate for the nation has declined about 80 percent from the previous decade Freshwater wetland systems were the most vulnerable to loss and change Development was the leading attributable cause of wetland loss to uplands Wetland restoration and creation are offsetting some losses

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