San Francisco Bay Multicolored ponds

On the coast of San Francisco Bay there are numerous colorful ponds, coloring varies from purple to bright green. To rate all the scale and splendor of this phenomenon is possible only from the plane window. From this height ponds resemble the giant stained glass, or an exhibition of abstract art. The phenomenon of the bright color palette of evaporation ponds in San Francisco is not man-made, but completely natural. Such a variety of shades appears to vigorous activity of micro-organisms living in the water.
And all these colorful ponds owned by Cargill, Inc., one of the world leaders in the food industry, and are used for extraction of salt from the sea or ocean water. Under the influence of the sun the moisture in the ponds evaporates, and the salt is deposited. Within five years of distilled water transfers from one reservoir to another, until all the minerals are rinsed side and salt layer is 15-20 centimeters thick does not remain on the bottom.

Each species of bacteria inhabiting ponds, prefers a certain degree of salinity of the water and begins to multiply wildly as soon as conditions are propitious. Multicolored ponds in San Francisco Bay – is not just a quirk of nature, serving only for passenger entertainment during their flight over the bay. Around these reservoirs has developed a rich ecosystem that includes more than one million coastal and marine birds. In addition, microorganisms influence well on water quality, which affects the quality of produced salt.
In fact, San Francisco – not the only place on Earth where you can find reservoirs of unusual colors. For example, close to the Dakar there is a lake known as Lac Rose, the water in it has a surprising soft pink hue. But you can hardly envy the residents living in the neighborhood with such wonders of nature, because it is not recommended to swim in these waters.
source vk.com/public80799977