Lac Rose (meaning Pink Lake) lies north of the Cap Vert

peninsula A peninsula (; ) is a landform that extends from a mainland and is surrounded by water on most, but not all of its borders. A peninsula is also sometimes defined as a piece of land bordered by water on three of its sides. Peninsulas exist on all ...

Senegal Senegal,; Wolof: ''Senegaal''; Pulaar: 𞤅𞤫𞤲𞤫𞤺𞤢𞥄𞤤𞤭 (Senegaali); Arabic: السنغال ''As-Sinighal'') officially the Republic of Senegal,; Wolof: ''Réewum Senegaal''; Pulaar : 𞤈𞤫𞤲𞤣𞤢𞥄𞤲𞤣𞤭 � ...

, some 30 km (18 miles) north-east of the capital,

Dakar Dakar ( ; ; wo, Ndakaaru) (from daqaar ''tamarind''), is the capital and largest city of Senegal. The city of Dakar proper has a population of 1,030,594, whereas the population of the Dakar metropolitan area is estimated at 3.94 million in 2 ...

, in northwest Africa. It is named for its

pink Pink is the color of a namesake flower that is a pale tint of red. It was first used as a color name in the late 17th century. According to surveys in Europe and the United States, pink is the color most often associated with charm, politeness, ...

waters caused by ''

Dunaliella salina ''Dunaliella salina'' is a type of halophile green unicellular micro-algae especially found in hypersaline environments, such as salt lakes and salt evaporation ponds. Known for its antioxidant activity because of its ability to create large ...

'' algae and is known for its high

salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantitie ...

content, up to 40% in some areas.

Description

The lake is separated from the Atlantic Ocean only by a narrow corridor of dunes, and is named for its

waters, which are caused by ''

'' algae. The algae produce a red pigment to help them absorb sunlight, which gives them energy to create ATP. The color is particularly visible during the

dry season The dry season is a yearly period of low rainfall, especially in the tropics. The weather in the tropics is dominated by the tropical rain belt, which moves from the northern to the southern tropics and back over the course of the year. The te ...

(from November to May) and less visible during the rainy season (June to October).

Magenta Magenta () is a color that is variously defined as pinkish- purplish-red, reddish-purplish-pink or mauvish-crimson. On color wheels of the RGB (additive) and CMY (subtractive) color models, it is located exactly midway between red and blue. I ...

coloured

samphire Samphire is a name given to a number of succulent salt-tolerant plants (halophytes) that tend to be associated with water bodies. *Rock samphire, ''Crithmum maritimum'' is a coastal species with white flowers that grows in Ireland, the Unit ...

bushes flourish in the lake’s white sandbanks; the sand dunes are terra-cotta-coloured.

Salt

The

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

is known for its high

content (up to 40% in some areas), which is mainly due to the ingress of seawater and its subsequent evaporation. Like the

Dead Sea The Dead Sea ( he, יַם הַמֶּלַח, ''Yam hamMelaḥ''; ar, اَلْبَحْرُ الْمَيْتُ, ''Āl-Baḥrū l-Maytū''), also known by other names, is a salt lake bordered by Jordan to the east and Israel and the West Bank ...

, the lake is sufficiently

buoyant Buoyancy (), or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pr ...

that people can float easily. Salt is exported across the region by up to 3,000 collectors, men and women from all over Western Africa, who work 6–7 hours a day. They protect their skin with ''beurre de Karité'' ( shea butter), an emollient produced from Shea nuts which helps avoid tissue damage. The salt is used by Senegalese fishermen to preserve fish, which is an ingredient in many traditional recipes, including the national dish, which is a fish and rice combination called

thieboudienne ''Tiep'' or ''thieb'' is a traditional dish from Senegal that is also consumed in Guinea-Bissau, Guinea, Mali, Mauritania, and The Gambia. It is the national dish in Senegal. The version of tiep called ''thieboudienne'' or ''chebu jen'' ( wo, ...

. About 38,000 tonnes of salt are harvested from this lake each year, which contributes to Senegal’s salt production industry. Senegal is the number-one producer of salt in Africa.

Wildlife

Despite the high

salinity Salinity () is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal ...

of the lake, which can reach as high as 350 g/L during the

, blackchin tilapia have been found living in

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

sections fed fresh water by an intermittent creek.

World heritage

Lake Retba is under consideration by

UNESCO The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations (UN) aimed at promoting world peace and security through international cooperation in education, arts, sciences and culture. It ...

as a

World Heritage Site A World Heritage Site is a landmark or area with legal protection by an international convention administered by the United Nations Educational, Scientific and Cultural Organization (UNESCO). World Heritage Sites are designated by UNESCO for h ...

Motorsport

The lake was often the finishing point of the

Dakar Rally The Dakar Rally (or simply "The Dakar"; formerly known as the "Paris–Dakar Rally") is an annual rally raid organised by the Amaury Sport Organisation. Most events since the inception in 1978 were staged from Paris, France, to Dakar, Senegal, ...

, before the rally moved to South America in 2009. In 2021, it hosted a round of the

Extreme E Extreme E is an FIA-sanctioned international off-road racing series that uses spec silhouette electric SUVs to race in remote parts of the world, such as the Saudi Arabian desert or the Arctic. All racing locations are chosen to raise awarenes ...

electric off-road racing series.

References

External links

Lake Retba''Senegal’s Pink Lake''
Al Jazeera English, October 2021 (video, 46 mins) {{DEFAULTSORT:Retba Lakes of Senegal Saline lakes of Africa