"The population of the American Chestnut Tree has been on a steady decline ever since the introduction of a devastating fungal disease in North America around the year 1904. The blight impacted the American Chestnut severely, diminishing its initial population by approximately 4 billion..."
"Numbers have declined by about 72 percent in the last 60 years, [...] [WWF] should already be taking action and disrupting the development, to ensure the species have their habitat. If they go extinct, it is unlikely for any other species to replace the Peary caribou's role in the ecological niche."
"The steller sea lion has faced the threat of endangerment since it was first listed under the Endangered Species Act in 1990. The western population in North America must answer to the destructive consequences of human and natural activities. Hunting and pollution pose the greatest threats to these aquatic mammals..."