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THE HISTORY OF AMERICAN ECOLOGICAL PROBLEMS Pre colonial Slash & Burn Land Management 1650-1750 Sustenance Farming & Commodification of Land 1775-1850 Monoculture of Tobacco South 1850-1890 Monoculture of Cotton South 1840-1940 Western Water Reclamation 1890-1910 Urban Pollution 1945-1965 Atomic Power & The Baby Boom 1950-1970 Biomagnification 1980-Present Invasive Species & Sprawl Edge Effect • Change in biotic relationships along the margins of ecosystems that have been fragmented • Often shown as changes in rates of predation, parasitism and interspecific competition Lab: Assessing Edge Effect In Mixed Woodlot Ecotones • Purpose: To determine if (and potentially, to what degree) the ecological phenomenon of edge effect is impact the community of secondary and tertiary consumers on the DHS Campus • Method: Longitudinal study of contacts between sham nests and predators/scavengers Protocol • 1) All members handling eggs or nest materials should put on gloves • 2) Travel to the three margins (high contrast, medium contrast, low contrast) and build sham nests of natural materials • 3) Place egg in nest and observe the position and location of the egg • 4) Return next week and record evidence of any potential contacts/predation