Saharan halophytics

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Saharan halophytics
Siwa oasis (2007-05-097) (870484450).jpg
Ecoregion PA0905.svg
Ecoregion territory (in purple)
Ecology
Realm Palearctic
Biome Flooded grasslands and savannas
Geography
Area54,031 km2 (20,861 sq mi)
Country Mauritania, Algeria, Tunisia, Libya, Egypt
Coordinates 29°15′S25°45′E / 29.25°S 25.75°E / -29.25; 25.75

The Saharan halophytics ecoregion (WWF ID: PA0905) covers a series of low-lying evaporite depressions and wetlands spread across North Africa. The depressions are characteristically saline, variously chotts (saline lakes fed by groundwater and some winter rains) or sabkhas (coastal, supratidal mudflats of evaporites). The plants of the areas are highly specialized to survive in the harsh environment, with many being xerophytes (drought-tolerant) and halophytes (salt-tolerant). The biodiversity of the areas has been relatively protected by their isolation, and unsuitability of alkaline soil for farming. [1] [2] [3] [4]

Contents

Location and description

The sites making up this ecoregion contain a wide variety of habitat types: salt pans, seasonal salt lakes, salt marshes, reed beds, and spring-fed oases. Chott and sebkha areas exist in arid regions with clay soils heavy with evaporites. Specific locations assigned to this ecoregion include:

The site are surrounded by terrain of the North Saharan steppe and woodlands ecoregion that extends across the northern Sahara. [2]

Climate

The climate of the ecoregion is Hot desert climate (Köppen climate classification (BWh)). This climate features stable air and high pressure aloft, producing a hot, arid desert. Hot-month temperatures typically average 29–35 °C (84–95 °F). [8] [9] Rainfall varies between 10–100 millimetres (0.39–3.94 in) per year. [1]

Flora and fauna

Megarine Oasis, Tunisia Megarine Lake Megarine ouasis Ouergla 4.JPG
Megarine Oasis, Tunisia

Vegetation within a site varies by soil salinity and sand tenure; these typically vary by distance from the center of a salt pan. Common species include Picklegrass ( Salicornia ), the generally subshrub genera Salsola , Saltbush ( Atriplex ), Halocnemum strobilaceum , and White wormwood ( Artemisia herba-alba ).

While there are some large mammals in these areas, the most common mammals are gerbils (the North African gerbil Gerbillus campestris and the Dipodillus ). An example of species diversity is that of the Chott el Hodna, in which have been identified 550 species of plants, 119 species of birds, 10 of reptiles and 20 of mammals. Animals of conservation in this area include the vulnerable Cuvier's gazelle ( Gazella cuvieri ) and the vulnerable Houbara bustard ( Chlamydotis undulata ). [4]

Protected areas

Over 25% of the ecoregion is officially protected. [3] These protected areas include:

Related Research Articles

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<span class="mw-page-title-main">Lake Natron</span> Alkaline lake in Arusha Region, Tanzania.

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<span class="mw-page-title-main">Djerid</span> One of the six geographical and economic regions of Tunisia

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<span class="mw-page-title-main">Etosha Pan</span> Big endorheic salt ville in Namibias north

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<span class="mw-page-title-main">Tozeur Governorate</span> Governorate of Tunisia

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<span class="mw-page-title-main">Chott el Djerid</span> Salt lake, endorheic basin in Tunisia

Chott el Djerid also spelled Sciott Gerid and Shott el Jerid, is a chott, a large endorheic salt lake in southern Tunisia. The name can be translated from the Arabic into English as "Lagoon of the Land of Palms".

<span class="mw-page-title-main">Chott Melrhir</span> Endorheic salt lake in Algeria

Chott Melrhir also known as Chott Melghir or Chott Melhir is an endorheic chott-kind of salt lake in northeastern Algeria. It is the westernmost part of a series of depressions, which extend from the Gulf of Gabès into the Sahara. They were created between Miocene and Early Pleistocene as a result of compression accompanying the formation of the Atlas Mountains. With the maximum area of about 6,700 km2 (2,600 sq mi), it is the largest lake in Algeria. It lies almost entirely below sea level and contains the lowest point in Algeria, −40 meters. Its size varies over the year and is usually larger than 130 km (81 mi) from east to west. The nearby cities are Biskra, El Oued and Touggourt.

<span class="mw-page-title-main">Chott Ech Chergui</span> Endorheic salt lake in Algeria

Chott Ech Chergui is a large endorheic salt lake in Saïda Province, northwestern Algeria. It is located at 34.35°N 0.5°E in the level terrain of the Hautes Plaines region between the Tell Atlas and the Saharan Atlas and is one of the largest lakes in Algeria.

<span class="mw-page-title-main">Wildlife of Libya</span> Natural fauna and flora of the country in north Africa

The wildlife of Libya is spread over the Mediterranean coastline and encompasses large areas of the Saharan desert. The protection of wildlife is provided through appropriate legislation in seven national parks, five reserves, 24 protected areas, two wetlands under Ramsar Convention, and also in other areas. Apart from these, there are also five UNESCO World Heritage Sites related to culture. The most important national parks are the El-Kouf National Park and Karabolli National Park. The well known nature reserves are the Benghazi Reserve and the Zellaf Reserve. The wildlife species recorded in the country are 87 mammals and 338 species of birds.

<span class="mw-page-title-main">Grand Erg Oriental</span> Erg in Algeria and Tunisia

The Grand Erg Oriental is a large erg or "field of sand dunes" in the Sahara Desert. Situated for the most part in Saharan lowlands of northeast Algeria, the Grand Erg Oriental covers an area some 600 km wide by 200 km north to south. The erg's northeastern edge spills over into neighbouring Tunisia.

<span class="mw-page-title-main">Tunisian salt lakes</span> Salted depressions between Gulf of Gabès and Algerian border

The Tunisian salt lakes are a series of lakes in central Tunisia, lying south of the Atlas Mountains at the northern edge of the Sahara. The lakes include, from east to west, the Chott el Fedjedj, Chott el Djerid, and Chott el Gharsa.

<span class="mw-page-title-main">North Saharan steppe and woodlands</span> Ecoregion in North Africa

The North Saharan steppe and woodlands is a desert ecoregion, in the deserts and xeric shrublands biome, that forms the northern edge of the Sahara. It extends east and west across Northern Africa, south of the Mediterranean dry woodlands and steppe ecoregion of the Maghreb and Cyrenaica, which is part of the Mediterranean forests, woodlands, and scrub biome. Winter rains sustain shrublands and dry woodlands that form an ecotone between the Mediterranean climate regions to the north and the hyper-arid Sahara Desert ecoregion to the south.

<span class="mw-page-title-main">Chott el Hodna</span> Endorheic salt lake in Algeria

The Chott el Hodna is a very shallow saline lake in Algeria. It is located within an endorheic basin in the Hodna region, towards the eastern end of the Hautes Plaines. The Chott el Hodna includes seasonal brackish and saline pools and marshes, but the central zone of the lake is characterized by a complete absence of vegetation.

<i>Hautes Plaines</i> Natural region in Algeria and NE Morocco

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<span class="mw-page-title-main">Hodna</span> Natural region in Algeria

The Hodna is a natural region of Algeria located between the Tell and Saharan Atlas ranges at the eastern end of the Hautes Plaines. It is a vast depression lying in the northeastern section of M'Sila Province and the western end of Batna Province.

<span class="mw-page-title-main">Central Anatolian steppe</span> Turkish ecoregion

The Central Anatolian steppe is a Palearctic ecoregion in the temperate grasslands, savannas, and shrublands biome. It covers an area of 24,934 km2.

<span class="mw-page-title-main">Rostov Nature Reserve</span> Strict nature reserve in Rostov Oblast, Russia

Rostov Nature Reserve is a Russian 'zapovednik' that protects a variety of sensitive southern European steppe wetlands, the largest herd of wild horses in Europe, and also wetland habitat for birds. The protected areas are divided into five sections that cover the waters of Lake Manych-Gudilo, islands in that lake, surrounding steppe and shore lands. The reserve is situated in the Orlovsky District, of Rostov Oblast, about 100 km northeast of Rostov-on-Don. It is part of a Ramsar Wetland site of international importance.

<span class="mw-page-title-main">Ivory Coast of Sviatoslav National Nature Park</span> National park in Ukraine

Ivory Coast of Sviatoslav National Nature Park, in English the "white beaches of Sviatosloav", is situated on the north coast of the Black Sea in southern Ukraine. It covers portions of Dnieper–Bug estuary, the Kinburn Peninsula just south of the estuary, and Yahorlyk Bay, a shallow bay of the Black Sea itself. Adjacent to the site along the coast is the Black Sea Biosphere Reserve. The various tracts protect and display the steppe ecology of south Ukraine and the adjacent waters. The park is in Mykolaiv Raion in Mykolaiv Oblast.

References

  1. 1 2 "Saharan halophytics". World Wildlife Federation. Retrieved March 21, 2020.
  2. 1 2 "Map of Ecoregions 2017". Resolve, using WWF data. Retrieved September 14, 2019.
  3. 1 2 "Saharan halophytics". Digital Observatory for Protected Areas. Retrieved August 1, 2020.
  4. 1 2 "Saharan halophytics". The Encyclopedia of Earth. Retrieved August 28, 2020.
  5. "Annotated list of Ramsar Sites in Algeria" (PDF) (pdf). Ramsar Convention on Wetlands. Retrieved October 31, 2020.
  6. "Chott el Hodna" (PDF) (pdf). Ramsar Convention on Wetlands. Retrieved October 31, 2020.
  7. "Siwa - Oasis Extraordinary". Aramco World. Retrieved October 30, 2020.
  8. Kottek, M.; Grieser, J.; Beck, C.; Rudolf, B.; Rubel, F. (2006). "World Map of Koppen-Geiger Climate Classification Updated" (PDF). Gebrüder Borntraeger 2006. Retrieved September 14, 2019.
  9. "Dataset - Koppen climate classifications". World Bank. Retrieved September 14, 2019.