Saline ponds at the Bonanza salt works near Sanlúcar de Barrameda. The red colour depends on the level of salinity and is directly caused by the algae Dunaliella salina and brine shrimp. Aerial view. Drone shot. Cádiz province, Andalusia, Spain.

dunaliella salina salt works natural area autumn salt outdoor background high angle view day straight line top view cross (shape) salt exploitation wetland area august october decanting basin microorganism water surface nobody cadiz (province) green micro algae (dunaliella salina) drone view saltworks nature natural areas ecosystem ecosystems fall (season) autumnal salts outdoors outsides outside backgrounds high angle shot overhead shots overhead shot overhead sight overhead sights overhead view overhead views days daytime straight lines top views top sight top sights view from above top shot cruciform cruciforms salt exploitation wetland areas salt exploitation wetland zone salt exploitation wetland zones micro organism micro organisms microorganisms microbe microbes water surfaces watersurface watersurfaces with nobody salt exploitation land use natural resources use naturalness area temperate season seasons ambiance mineral matter matter (substance) shot shape artificial wetland area freshwater wetland area water treatment plant urban waste water treatment water depollution pollution management environment water (matter) enumeration andalusia autonomous community spain european union europe chlorophyceae green alga / chlorophyta alga flora aerial view