Figure 6.

Changes in land use and land-cover near the Des Moines site from 1984–2004. A supervised classification of land use/land cover was performed for 1984 and 2004 to measure built-up land (maroon) and tree-covered land (green) over time using a 4km fixed area around the Des Moines trap site (A). Changes in land use/land cover classification are displayed by each year according to classification (B) or by classification over time (C). Values are displayed as percentages of total pixels or total pixel count respectively. Land use classifications falling under the agriculture or bare terms were not identified for the Des Moines site and were therefore excluded in the presentation of the data.