Phototrophic purple sulfur bacteria as heat engines in the South Andros Black Hole

  title={Phototrophic purple sulfur bacteria as heat engines in the South Andros Black Hole},
  author={Rodney Andrew Herbert and Andrew Gall and Takashi Maoka and Richard J. Cogdell and Bruno Robert and Shinichi Takaichi and S Schwabe},
  journal={Photosynthesis Research},
Photosynthetic organisms normally endeavor to optimize the efficiency of their light-harvesting apparatus. However, here we describe two bacterial isolates belonging to the genera Allochromatium and Thiocapsa that demonstrate a novel adaptation by optimizing their external growth conditions at the expense of photosynthetic efficiency. In the South Andros Black Hole, Bahamas, a dense l-m thick layer of these anoxygenic purple sulfur bacteria is present at a depth of 17.8 m. In this layer the… 
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