"Forests cover approximately 30 percent of the Earth's landmass and provide important ecosystem services that include food, fuel, and timber, as well as habitat for diverse organisms. Threats posed to forests by invasive and pestiferous species are rapidly growing. Global change, an umbrella term that includes may human-mediated processes such as climate change and international trade, is altering the structure and functioning of forests." So writes forest entomologist Todd Johnson assistant...
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