In 1969, President Nixon issued to Congress a "Message on Population." Referring to the expectation of the time that the U.S. population might exceed 300 million by the year 2000, he said:
This growth will produce serious challenges for our society. I believe that many of our present social problems may be related to the fact that we have had only fifty years in which to accommodate the second hundred million Americans. In fact, since 1945 alone some 90 million babies have been born in this country. We have thus had to accommodate in a very few decades an adjustment to population growth which was once spread over centuries. And now it appears that we will have to provide for a third hundred million Americans in a period of just 30 years.
Sandplain gerardia: As the human population has increased, it has consumed remote landscapes with houses and other structures. The natural disturbances caused by fire, flood, drought and storm patterns, are suppressed despite playing essential roles in ecosystem health. In conflict with the permanence of human development, these disturbances create an ever-changing blend of meadow and forest, young and mature vegetation patterns. By controlling, limiting and often stopping these essential natural processes, we have changed ecosystems across America, eliminating habitat for rare and endangered species that depend on open habitats.
In New England and the Atlantic coast, brush fires once thinned out dense pine forests and created a constantly moving mosaic of grasslands and prairies. The fires have been suppressed to protect human structures, causing open habitats to be permanently replaced by forest and brush. This nearly caused the extinction of the sandplain gerardia, a coastal plant in the snapdragon family.
As the human population grows and the rich countries continue to consume resources at voracious rates, we are crowding out, poisoning and eating all other species into extinction. With the world population hitting 7 billion, the Center is marking this milestone by releasing a list of species in the United States facing extinction caused by the growing human population. The 10 species represent a range of geography, as well as species diversity — but all are critically threatened by the effects of human population. Some, like the Florida panther and Mississippi gopher frog, are rapidly losing habitat as the human population expands. Others are seeing their habitat dangerously altered — like the small flowering sandplain gerardia in New England — or, like the bluefin tuna, are buckling under the weight of massive overfishing. Still others, like the polar bear, are facing extinction because of fossil fuels driving catastrophic global warming.
Source: Center for Biological Diversity
