|For Many Species Its Sink or Swim|
Photograph by Peter Essick
A southern sand darter hovers in Alabamas unbridled Cahaba River, which boasts remarkable freshwater biodiversity with more fish species per mile than any other river in North America. But the introduction of dams and other diversions alters much of the worlds river habitat. Some species can adapt, but for others the results can be devastating: Modifications of natural river flows are part of the reason that during the past decade 20 percent of all freshwater fish species have become threatened or endangeredor extinct.
|Camera: Canon EOS 1N
Film Type: Fujichrome Velvia 50
Speed and F-Stop: 1/250 @ f/5.6
||Weather Conditions: Sunny|
Time of Day: Near sunset
Lighting Techniques: I used a polarizer and gyro.