The New York Times discusses a growing science subculture — the urban evolutionist. These brave souls are charting the growth of the super-strong mutant rats, fish, bacteria, and bugs that will someday overrun planet:
A small but growing number of field biologists study urban evolution — not the rise and fall of skyscrapers and neighborhoods, but the biological changes that cities bring to the wildlife that inhabits them. For these scientists, New York is one great laboratory.
White-footed mice, stranded on isolated urban islands, are evolving to adapt to urban stress. Fish in the Hudson have evolved to cope with poisons in the water. Native ants find refuge in the median strips on Broadway. And more familiar urban organisms, like bedbugs, rats and bacteria, also mutate and change in response to the pressures of the metropolis.
Pollution has driven some of the starkest examples of evolution around New York. Hudson River fish faced a dangerous threat from PCBs, which General Electric released from 1947 to 1977.