| The Heinz Center's State of the Nation's
Ecosystems |
| ecosystem: |
Core National Indicators |
| indicator Name: |
National Extent: recent trends |
| page # in printed report: |
41 |
| location on page: |
upper graph |
| data source: |
USDA Forest Service (forests, current area, recent trends), USDA
Economic Research Service (croplands trends, urban area trends), Multi-Resolution
Land Characterization Consortium (MRLC; all satellite data, including
current estimate of grass/shrub and urban/suburban area in top graph).
Presettlement estimates are from Klopatek et al. (1979). Coverage:
lower 48 states. |
| notes: |
please see technical notes for further details on accessing these
data from their original source; |
|
this data table comes from a specific graphic in The State of the
Nation's Ecosystems report (www.heinzctr.org/ecosystems) |
| units: % of US land area |
| |
Other |
Urban & Suburban |
Croplands |
Forests |
Grasslands and Shrublands |
| presettlement |
0.0 |
0.0 |
0.0 |
48.5 |
51.5 |
| 1990s |
6.3 |
1.7 |
24.1 |
31.7 |
36.1 |
|