The most favorable lakes for the development of purple sulfur bacteria are those that are

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Purple sulfur bacteria thrive in anaerobic conditions with plenty of organic matter. Meromictic lakes have distinct layers of water with different oxygen and nutrient levels, which provide ideal conditions for these bacteria to grow. Oligotrophic lakes have low nutrient levels, which may limit the growth of purple sulfur bacteria. Eutrophic lakes have high nutrient levels, but may also have higher oxygen levels, which are not as favorable for the growth of these anaerobic bacteria. Sedimentary lakes may have a lot of organic matter, but may not have the same anaerobic conditions as meromictic lakes.

The Most Favorable Lakes for the Development of Purple Sulfur