. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. Figure 1. In Example 1. the species have nested distribution among the four islands with respect to island area and richness. Each set of species on an island is a perfect subset of the species of each larger island; as island size decreases certain species are lost. Species A represents a widespread generalist that is present in no particular pat- tern; it does not contribute to the nested pattern. Species , and D are nested. Sp
. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. Figure 1. In Example 1. the species have nested distribution among the four islands with respect to island area and richness. Each set of species on an island is a perfect subset of the species of each larger island; as island size decreases certain species are lost. Species A represents a widespread generalist that is present in no particular pat- tern; it does not contribute to the nested pattern. Species , and D are nested. Species D is the most area sensitive species, and may be a species of conservation concern because it requires large contiguous habitats. In Example 2, the species assemblage is not nested. Species are distributed randomly among Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Illinois. Natural History Survey Division; Critical Trends Assessment Project. [Illinois] : Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning : Office of Scientific Research and Analysis, Natural History Survey Division
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