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Problem Percentage of SGCN in the Subsection <br />for Which This Is a Problem <br />Habitat Loss in MN 81 <br />Habitat Degradation in MN 87 <br />Habitat Loss/Degradation Outside of MN 28 <br />Invasive Species and Competition 32 <br />Pollution 38 <br />Social Tolerance/Persecution/Exploitation 21 <br />Disease 2 <br />Fond Source Limitations 3 <br />Other 17 <br />The graph shown <br />here demonstrates <br />how much the <br />landscape of the <br />eastern Metro area <br />had changed over <br />the course of 100 <br />years. <br />The oak savanna <br />that once covered <br />half of the area has <br />been reduced to a <br />tiny fraction, and the <br />remaining patches <br />are no longer <br />connected (habitat <br />fragmentation). <br />C — Terrestrial Habitat Change <br />Forest -Upland Deciduous (Aspen -oak) <br />Forest -Upland Deciduous (Hardwood) <br />Oak Savanna <br />Prairie <br />Grassland 0 <br />Cropland <br />❑ 1890S Developed <br />0 1990S <br />■ Key Habitat Water <br />Not only are viable habitats <br />fragmented, they have also <br />been invaded by 3300 <br />species of introduced <br />plants. <br />'IO °IO <br />7.3 0.3 <br />18.0 6.3 <br />50.1 2.8 <br />9.4 0.0 <br />13.4 <br />30.3 <br />31.3 <br />0 50 100 150 200 250 <br />Acres (in thousands) <br />"We have allowed alien plants to replace natives all over the country. Our native <br />animals and plants cannot adapt to this gross and completely unnatural <br />manipulation of their environment in time to <br />negate the consequences. Their only hope for a <br />sustainable future is for us to intervene to right <br />the wrongs that we have perpetrated." - D. Tallamy F <br />Insects are critical components of nearly all terrestrial food we <br />being eaten, insects turn plants into protein and power the growth o <br />species — including freshwater fish and a majority of birds — that n <br />not to mention all the creatures that eat those creatures. - B. Jarvis <br />* 96% of terrestrial birds in North <br />America feed their young insects and Causes of insect <br />of those insects are caterpillars. declines <br />* 90% of insects that eat plants can <br />develop and reproduce ONLY on the <br />plants with which they share an <br />evolutionary history. <br />"Like other species, insects are <br />responding to what Chris Thomas, an <br />insect ecologist at the University of <br />York, has called "the transformation <br />Pesticides <br />Habitat loss <br />Nonnative ornamentals <br />Invasive species <br />Security lights <br />Roadside mortality <br />Climate change <br />3 <br />