Gradients Column Foil cap 02 Algae and cyanobacteria Lake or pond water Purple nonsulfur bacteria Sulfur Mud chemolithotrophs supplemented- Patches of purple with organic sulfur or green nutrients sulfur bacteria and CaSO4 H2S Anoxic decomposition and sulfate (a) reduction 2012 Pearson Education,Inc. Winogradsky Column:a miniature anoxic ecosystem.Its has been used to isolate purple and green phototrophic bacteria, sulfate-reducing bacteria,and many other anaerobes.一个缩微 的厌氧生态系统。可用于分离紫色和绿色光合菌、硫还原细菌和其它的厌氧菌。Winogradsky Column: a miniature anoxic ecosystem. Its has been used to isolate purple and green phototrophic bacteria, sulfate-reducing bacteria, and many other anaerobes.一个缩微 的厌氧生态系统。可用于分离紫色和绿色光合菌、硫还原细菌和其它的厌氧菌