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Number
2-1    Population, 1790
2-2    Population, 1850
2-3    Percent of land in farms by county, 1850
2-4    Population, 1860
2-5    Percent of land in farms by county, 1860
2-6    Population, 1900
2-7    Percent of land in farms by county, 1900
2-8    Population, 1950
2-9    Percent of land in farms by county, 1950
2-10   Population, 1990 and percent of land in farms by county, 1992
2-11   Percent of land in farms by coundy, 1982, and 1992
3-1    Nighttime "city lights" image for the continental United States
3-2    Soils map of the united States
3-3    Percent of soil area covered by lights in the United States
3-4    Percent of soil area covered by lights for all 315 soil units for the United States
4-1    A field dominated by kudzu in northern Georgia
4-2    Published floras used to detect changing patterns in species number
4-3    Estimated size of the flora for specific areas in 1900 and 1996
4-4    Estimated proportion of exotic species for specific areas in 1900 and 1996
5-1    Study area for the Baltimore-Washington Regional Collaboratory
5-2    Two hundred years of urban growth for the Baltimore-Washington region
5-3    Simulated forest land cover showing 200 years of urban growth in Baltimore
5-4    Long-term ecological research location map in Baltimore
5-5    Spatial analysis for forest patch map comparison
5-6    Temporal analysis of land cover using 1972 and 1994 photos
5-7    Baltimore region counties' population densities for 1800, 1890, and 1990
6-1    Presettlement and modern forests, and changes in forest types in Great Lakes states
6-2    Changes in area covered by major forest types in the Great lakes states
6-3    The average size of contiguous presettlement and modern forest patches in the Great Lakes states
6-4    Pollen sites in the Great Lakes states
6-5    Scatterplots of squared cord distance values between pollen samples
7-1    Locations of navigation reaches 25 and 26, upper Mississippi River
7-2    Section lines of the U.S. General Land Office surveys permanently etched across the landscape
7-3    Prairie-forest continuum and tree density criteria used to generalize presettlement communitites
7-4    Presettlement land cover along navigation reaches 25 and 26 of the upper Mississippi River
7-5    Contemporary land cover along navigation reaches 25 and 26 of the upper Mississippi River
7-6    Conceptual model of the presettlement upper Mississippi River valley ecosystem
8-1    The Greater Yellowstone Ecosystem
8-2    Time periods examined for studying the natural and human drivers of biodiversity in the Greater Yellowstone Ecosystem
8-3    Strong abiotic gradients in the Greater Yellowstone Ecosystem
8-4    Bird abundance in the Greater Yellowstone Ecosystem
8-5    Bird species richness in the Greater Yellowstone Ecosystem
8-6    Portions of Yellowstone National Park burned by wildfires in 1988
8-7    Stages of lodgepole pine forests after fires
8-8    Past vegetation patterns in the Targhee National Forest
8-9    Remains of a homestead on a productive valley bottom near the Gallatin River
8-10   Frequency distribution of land allocation across elevation classes over the study area
8-11   Landscape patterns imposed by wildfire in Yellowstone National Park
8-12   The Gallatin Valley near Bozeman, Montana
8-13   Change in rural residential development in a portion of Gallatin County, Montana
8-14   New construction in Gallatin County, Montana, 1979-95
8-15   Primary productivity compared with human population density
9-1    Vegetation changes in southwestern landscapes since the end of the last ice age
9-2    Diagram showing fossil packrat midden records of pinyon in the Southwest
9-3    An isolated stand of Colorado pinyon at Owl Canyon in 1950 and 1989
9-4    Creosotebush at the Sevilleta Long-Term Ecological Research site in 1915 and 1989
9-5    Views from Acoma Pueblo to Enchante Mesa in 1899 and 1977
9-6    Photographs of Silver Lake in 1891 and 1982
9-7    The confluence of the west branch of the Santa Cruz River in Tucson, 1904 and 1981
9-8    Changes in montane grassland area between 1935 and 1981 in the Jemez Mountains
9-9    Roads in 1935 and 1981 from aerial photographs of the Bandelier National Monument area
9-10   A tree ring sample showing fire scars
9-11   Fire history study sites in the southwestern United States
9-12   Fire-scar chronologies for different forest sites in 27 southwestern mountain ranges
9-13   A cross-scale comparison of the largest regional fire year (1748) in the Southwest
9-14   Ponderosa pine forest changes
10-1    The Palouse bioregion
10-2    Human population change on the Palouse Prairie
10-3    Percent of total land area in farms through time in three counties
10-4    Changing proportion of the human population living in rural areas
10-5    Rural population and average farm size through time for Whitman County
10-6    Historical and current vegetation in the Palouse bioregion
10-7    Changing vegetation over time of an area near Viola, Idaho
10-8    Past vegetation predicted from soil characteristics for areas in Idaho
10-9    Cropland soil loss due to erosion, 1939-72

Number
2-1    Large, historically non-farmed or unsustainably-farmed regions in the United States
3-1    U.S. soils grouped by number of physical factors limiting agricultural production
3-2    Results for soils of top-producing agricultural states
5-1    Historical trends of land use and land cover for the Chesapeake region
7-1    Presettlement tree composition within reaches 25 and 26 of the upper Mississippi River
10-1    Changes in species composition since European-American settlement
10-2    Noxious weeds in Latah County, Idaho

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Last Updated: Tuesday, 15-Aug-2000 08:26:50 MDT