San Francisco Bay Salt Ponds, Fremont, California, USA
The San Francisco Bay salt ponds are bright pond pockets of red and green and are caused by the organisms or micro-algae living within them. The microorganisms located in each pond are determined by their tolerance to salinity, and the colors are reactions to salt levels. The evaporation ponds cover an array of hues from bright green, where low salinity encourages green algae to thrive, to a deep coral pink or red hue that is caused by the algae Dunaliella, producing a red pigment in response to high salt content. A high number of tiny brine shrimp cast an orange sheen to the ponds that are considered mid-salinity. Weather can affect the colors as well, but their ever-changing pigments always stand out from the sky, and have served as a visual marker for astronauts.
Since 1854, salt was one of San Francisco’s largest industries, with over 80% of its wetlands developed for salt mining. The salt ponds covered over 16,500 acres, most of which was owned by Cargill, Inc., an international food production and marketing company. In 2003, Cargill, Inc. sold 15.100 acres of the ponds to State and Federal agencies as well as private foundations who are in the process of restoring them to their pristine tidal wetland beginnings.
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Congratulations to Mavis Ansong, from Saltpond Model Kindergarten School, who came second in the award for ‘Best Kindergarten Teacher in the Mfantseman District’ during the district's celebration of World Teachers’ Day on Friday. Mavis was a student teacher on our Fast-track Transformational Teacher Training during the 2013/14 academic year, and has gone on to implement the programme fantastically well in her own classroom. This is incredibly timely and fitting as that very teacher training project which helped Mavis transform her practice was awarded the prestigious @UNESCO-Hamdan Bin Rashid Al -Maktoum Prize for Outstanding Practice and Performance in Enhancing the Effectiveness of Teachers on World Teachers’ Day also!