East Sudanian savanna

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East Sudanian savanna
Girafe du parc national de Zakouma.jpg
Giraffe in Zakouma National Park, Chad
AT0705 map.png
Map of the East Sudanian savanna ecoregion
Ecology
Realm Afrotropical
Biome tropical and subtropical grasslands, savannas, and shrublands
Borders
Geography
Area917,630 km2 (354,300 sq mi)
Countries
Conservation
Conservation status Critical/endangered
Protected24.68% [1]

The East Sudanian savanna is a hot, seasonally dry tropical savanna ecoregion of Central and East Africa.

Contents

Geography

The East Sudanian savanna is the eastern half of the Sudanian savanna belt which runs east and west across Africa. The eastern lies east of the Cameroon Highlands, and west of the Ethiopian Highlands. The Sahel belt of drier acacia savanna lies to the north, and beyond that is the Sahara Desert. More humid forest–savanna mosaic ecoregions lie to the south.

The Sudd flooded grasslands in South Sudan divide the ecoregion into eastern and western blocks. The land is mainly flat, although there are some hillier sections around Lake Albert and in western Ethiopia.

Climate

The climate is a tropical savanna climate and a hot semi-arid climate (Köppen climate classification Aw and BSh) with a dry season and a wet season and the temperature being warm and hot year-round.

Examples

Climate data for Garoua, Cameroon
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)34.4
(93.9)
37.3
(99.1)
39.8
(103.6)
39.5
(103.1)
36.5
(97.7)
33.2
(91.8)
31.1
(88.0)
30.7
(87.3)
31.5
(88.7)
34.2
(93.6)
36.0
(96.8)
34.8
(94.6)
34.9
(94.8)
Daily mean °C (°F)26.0
(78.8)
28.9
(84.0)
32.2
(90.0)
33.0
(91.4)
30.7
(87.3)
28.2
(82.8)
26.6
(79.9)
26.4
(79.5)
26.7
(80.1)
28.1
(82.6)
27.3
(81.1)
26.0
(78.8)
28.3
(82.9)
Mean daily minimum °C (°F)17.5
(63.5)
20.5
(68.9)
24.7
(76.5)
26.4
(79.5)
24.9
(76.8)
23.2
(73.8)
22.2
(72.0)
22.0
(71.6)
21.9
(71.4)
22.2
(72.0)
19.2
(66.6)
17.3
(63.1)
21.8
(71.2)
Average rainfall mm (inches)0.0
(0.0)
0.0
(0.0)
2.0
(0.08)
44.1
(1.74)
108.4
(4.27)
134.8
(5.31)
205.3
(8.08)
247.9
(9.76)
190.0
(7.48)
63.3
(2.49)
1.6
(0.06)
0.0
(0.0)
997.4
(39.27)
Average rainy days (≥ 1.0 mm)001591114172461088
Mean monthly sunshine hours 275.0252.6260.1245.4256.7224.4194.0187.2204.5261.5279.2286.52,927.1
Source: NOAA [2]
Climate data for Sarh, Chad (1961-1990)
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)35.8
(96.4)
38.0
(100.4)
39.1
(102.4)
38.5
(101.3)
36.2
(97.2)
33.2
(91.8)
30.9
(87.6)
30.6
(87.1)
31.7
(89.1)
33.6
(92.5)
35.5
(95.9)
35.4
(95.7)
34.9
(94.8)
Mean daily minimum °C (°F)16.5
(61.7)
18.8
(65.8)
22.6
(72.7)
24.7
(76.5)
24.1
(75.4)
22.6
(72.7)
21.6
(70.9)
21.5
(70.7)
21.5
(70.7)
21.7
(71.1)
18.8
(65.8)
16.4
(61.5)
20.9
(69.6)
Average rainfall mm (inches)0.1
(0.00)
1.6
(0.06)
9.5
(0.37)
37.4
(1.47)
82.1
(3.23)
135.9
(5.35)
234.4
(9.23)
243.7
(9.59)
165.5
(6.52)
55.8
(2.20)
3.3
(0.13)
0.0
(0.0)
969.3
(38.16)
Average rainy days (≥ 0.1 mm)012591215181671086
Average relative humidity (%)33293750617279828073574258
Mean monthly sunshine hours 266.6243.6244.9237.0241.8207.0173.6176.7186.0232.5261.0266.62,737.3
Mean daily sunshine hours 8.68.77.97.97.86.95.65.76.27.58.78.67.5
Source 1: World Meteorological Organization (temperatures and rainy days) [3]
Source 2: NOAA (sun, humidity and precipitation) [4]
Climate data for Moundou, Chad (1961-1990)
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)34.1
(93.4)
36.7
(98.1)
38.6
(101.5)
38.0
(100.4)
35.7
(96.3)
32.3
(90.1)
30.2
(86.4)
29.8
(85.6)
30.7
(87.3)
33.1
(91.6)
35.1
(95.2)
34.2
(93.6)
34.0
(93.2)
Mean daily minimum °C (°F)15.1
(59.2)
18.3
(64.9)
22.5
(72.5)
24.2
(75.6)
23.5
(74.3)
22.1
(71.8)
21.2
(70.2)
21.0
(69.8)
20.8
(69.4)
21.0
(69.8)
17.4
(63.3)
14.6
(58.3)
20.1
(68.2)
Average rainfall mm (inches)0.0
(0.0)
0.2
(0.01)
4.6
(0.18)
39.2
(1.54)
89.8
(3.54)
147.7
(5.81)
257.8
(10.15)
284.8
(11.21)
200.1
(7.88)
57.1
(2.25)
1.5
(0.06)
0.0
(0.0)
1,082.8
(42.63)
Average rainy days (≥ 0.1 mm)012591215191372085
Average relative humidity (%)36283150637380817873564558
Mean monthly sunshine hours 279.0249.2248.0234.0241.8210.0182.9170.5186.0235.6282.0291.42,810.4
Mean daily sunshine hours 9.08.98.07.87.87.05.95.56.27.69.49.47.7
Source 1: World Meteorological Organization [5]
Source 2: NOAA (sun and humidity) [6]
Climate data for Birao, Central African Republic
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)34.7
(94.5)
37.3
(99.1)
39.4
(102.9)
39.7
(103.5)
37.9
(100.2)
35
(95)
31.4
(88.5)
30.8
(87.4)
32.1
(89.8)
34.5
(94.1)
35
(95)
33.6
(92.5)
35.1
(95.2)
Daily mean °C (°F)23.7
(74.7)
26
(79)
28.8
(83.8)
30.4
(86.7)
30.2
(86.4)
28.3
(82.9)
25.7
(78.3)
25.3
(77.5)
25.9
(78.6)
26.5
(79.7)
23.9
(75.0)
22.5
(72.5)
26.4
(79.6)
Mean daily minimum °C (°F)12.7
(54.9)
14.8
(58.6)
18.3
(64.9)
21.1
(70.0)
22.5
(72.5)
21.6
(70.9)
20.1
(68.2)
19.8
(67.6)
19.7
(67.5)
18.6
(65.5)
12.8
(55.0)
11.4
(52.5)
17.8
(64.0)
Average rainfall mm (inches)0
(0)
0
(0)
1
(0.0)
20
(0.8)
67
(2.6)
107
(4.2)
189
(7.4)
193
(7.6)
146
(5.7)
38
(1.5)
1
(0.0)
0
(0)
762
(29.8)
Source: Climate-Data.org [7]
Climate data for Wau, South Sudan
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)41.1
(106.0)
42.2
(108.0)
43.5
(110.3)
42.0
(107.6)
41.5
(106.7)
38.5
(101.3)
36.5
(97.7)
36.7
(98.1)
40.0
(104.0)
39.2
(102.6)
38.5
(101.3)
39.5
(103.1)
43.5
(110.3)
Mean daily maximum °C (°F)35.5
(95.9)
37.1
(98.8)
38.1
(100.6)
37.4
(99.3)
35.3
(95.5)
32.9
(91.2)
31.4
(88.5)
31.4
(88.5)
32.6
(90.7)
33.8
(92.8)
35.2
(95.4)
35.2
(95.4)
34.7
(94.5)
Daily mean °C (°F)26.8
(80.2)
28.5
(83.3)
30.4
(86.7)
30.6
(87.1)
29.3
(84.7)
27.5
(81.5)
26.3
(79.3)
26.2
(79.2)
26.8
(80.2)
27.4
(81.3)
27.4
(81.3)
26.5
(79.7)
27.8
(82.0)
Mean daily minimum °C (°F)19.1
(66.4)
19.9
(67.8)
22.7
(72.9)
23.8
(74.8)
23.2
(73.8)
22.0
(71.6)
21.2
(70.2)
21.0
(69.8)
21.0
(69.8)
21.0
(69.8)
19.6
(67.3)
17.9
(64.2)
20.9
(69.6)
Record low °C (°F)9.3
(48.7)
12.5
(54.5)
14.9
(58.8)
16.5
(61.7)
19.5
(67.1)
17.7
(63.9)
18.0
(64.4)
18.6
(65.5)
17.0
(62.6)
16.4
(61.5)
11.4
(52.5)
10.3
(50.5)
9.3
(48.7)
Average precipitation mm (inches)1.3
(0.05)
3.6
(0.14)
18.6
(0.73)
68.3
(2.69)
118.8
(4.68)
177.4
(6.98)
176.0
(6.93)
192.3
(7.57)
179.4
(7.06)
123.8
(4.87)
14.9
(0.59)
0.1
(0.00)
1,074.5
(42.30)
Average precipitation days (≥ 0.1 mm)0.20.33.46.311.412.715.915.523.711.21.70.1102.4
Average relative humidity (%)29263548627176777469483554
Mean monthly sunshine hours 288.3246.4229.4228.0220.1204.0182.9192.2204.0223.2264.0294.52,777
Mean daily sunshine hours 9.38.87.47.67.16.85.96.26.87.28.89.57.6
Percent possible sunshine 79746261605447505660758263
Source: NOAA [8]
Climate data for Juba, South Sudan (1971–2000, extremes 1931–1990)
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)42.2
(108.0)
43.0
(109.4)
43.6
(110.5)
42.4
(108.3)
43.7
(110.7)
38.5
(101.3)
37.0
(98.6)
38.5
(101.3)
39.0
(102.2)
39.6
(103.3)
40.4
(104.7)
42.8
(109.0)
43.7
(110.7)
Mean daily maximum °C (°F)36.8
(98.2)
37.9
(100.2)
37.7
(99.9)
35.4
(95.7)
33.5
(92.3)
32.4
(90.3)
31.1
(88.0)
31.6
(88.9)
33.1
(91.6)
34.0
(93.2)
34.7
(94.5)
35.9
(96.6)
34.5
(94.1)
Daily mean °C (°F)28.2
(82.8)
29.3
(84.7)
29.9
(85.8)
28.7
(83.7)
27.6
(81.7)
26.5
(79.7)
25.6
(78.1)
25.5
(77.9)
26.4
(79.5)
26.9
(80.4)
27.4
(81.3)
27.5
(81.5)
27.5
(81.4)
Mean daily minimum °C (°F)20.1
(68.2)
21.7
(71.1)
23.6
(74.5)
23.4
(74.1)
22.6
(72.7)
21.9
(71.4)
21.1
(70.0)
21.0
(69.8)
21.1
(70.0)
21.3
(70.3)
20.9
(69.6)
20.0
(68.0)
21.6
(70.9)
Record low °C (°F)11.4
(52.5)
12.2
(54.0)
16.3
(61.3)
16.5
(61.7)
16.8
(62.2)
14.0
(57.2)
13.3
(55.9)
16.0
(60.8)
15.5
(59.9)
14.0
(57.2)
13.2
(55.8)
13.9
(57.0)
11.4
(52.5)
Average rainfall mm (inches)5.1
(0.20)
11.0
(0.43)
36.7
(1.44)
111.5
(4.39)
129.9
(5.11)
117.8
(4.64)
144.7
(5.70)
127.5
(5.02)
103.7
(4.08)
114.5
(4.51)
43.1
(1.70)
8.2
(0.32)
953.7
(37.55)
Average rainy days (≥ 0.1 mm)1.42.06.611.612.410.313.011.58.610.46.51.996.2
Average relative humidity (%)44425164737681807773695365
Mean monthly sunshine hours 279.0235.2210.8198.0207.7207.0182.9204.6228.0241.8237.0260.42,692.4
Percent possible sunshine 76675754625850576364686862
Source 1: World Meteorological Organization , [9]
Source 2: NOAA (sun and humidity, 1961–1990), [10] Deutscher Wetterdienst (extremes, mean temperatures) [11]
Climate data for Ad-Damazin, Sudan (1961-1990)
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)41.1
(106.0)
44.3
(111.7)
44.5
(112.1)
45.5
(113.9)
47.0
(116.6)
42.0
(107.6)
39.0
(102.2)
37.0
(98.6)
38.1
(100.6)
40.0
(104.0)
41.0
(105.8)
41.5
(106.7)
47.0
(116.6)
Mean daily maximum °C (°F)35.2
(95.4)
37.1
(98.8)
39.5
(103.1)
40.5
(104.9)
38.5
(101.3)
35.2
(95.4)
31.8
(89.2)
31.1
(88.0)
32.5
(90.5)
35.2
(95.4)
36.9
(98.4)
35.7
(96.3)
35.8
(96.4)
Daily mean °C (°F)26.0
(78.8)
27.7
(81.9)
30.7
(87.3)
32.2
(90.0)
31.7
(89.1)
29.1
(84.4)
26.7
(80.1)
26.1
(79.0)
26.7
(80.1)
28.2
(82.8)
27.9
(82.2)
26.3
(79.3)
28.3
(82.9)
Mean daily minimum °C (°F)16.8
(62.2)
18.4
(65.1)
21.9
(71.4)
23.9
(75.0)
24.8
(76.6)
22.9
(73.2)
21.5
(70.7)
21.2
(70.2)
21.0
(69.8)
21.2
(70.2)
19.0
(66.2)
17.0
(62.6)
20.8
(69.4)
Record low °C (°F)8.5
(47.3)
10.4
(50.7)
13.4
(56.1)
16.3
(61.3)
18.0
(64.4)
17.5
(63.5)
15.9
(60.6)
17.5
(63.5)
17.5
(63.5)
14.3
(57.7)
12.0
(53.6)
8.7
(47.7)
8.5
(47.3)
Average rainfall mm (inches)0.0
(0.0)
0.1
(0.00)
2.8
(0.11)
12.9
(0.51)
40.2
(1.58)
114.4
(4.50)
189.2
(7.45)
171.8
(6.76)
133.6
(5.26)
45.7
(1.80)
2.1
(0.08)
0.1
(0.00)
712.9
(28.05)
Average rainy days (≥ 0.1 mm)0.00.10.31.46.012.316.116.912.44.70.50.070.7
Average relative humidity (%)29232124435972797667383246.9
Mean monthly sunshine hours 303.8280.0294.5288.0257.3201.0170.5182.9204.0251.1279.0294.53,006.6
Percent possible sunshine 85857978665344455668838369
Source: NOAA [12]

Flora

Typical species are deciduous Terminalia trees with an undergrowth of shrubs and grasses such as Combretum and tall elephant grass (Pennisetum purpureum). There are more than 1,000 endemic plant species. [13]

Fauna

Threatened species include the African bush elephant (Loxodonta africana) (in Chad and the CAE), East African wild dog (Lycaon pictus lupinus), Northeast African cheetah (Acinonyx jubatus soemmeringii), African leopard (Panthera pardus paruds), lion (Panthera leo), and giant eland (Taurotragus derbianus). [13]

Urban areas and settlements

In Cameroon the region is more or less contiguous with the North Region, where Bénoué National Park and Bouba Njida National Park contain some of the endangered species mentioned above. In Chad East Sudanian savanna covers the south including the industrial city of Moundou, Chad's second largest city, the oil town of Doba and the cotton-growing towns of Sarh and Pala. In the Central African Republic the region covers the sparsely populated north of the country, the larger towns include Bossangoa. In Sudan west of the Sudd swamp east Sudanian savanna covers the Bahr el Ghazal area including the town of Wau. East of the Sudd the ecoregion runs north to south from northern Uganda, through south-eastern Sudan east of the White Nile (including the area around the southern cities of Juba and Eastern Equatoria around Torit), and up along the Ethiopia–Sudan border. Much of this area has seen combat in recent decades and is in various states of reconstruction.

Threats and preservation

Seasonal cultivation and herding are lifestyles which lead the population of the savanna to overgraze, overharvest the trees for firewood or charcoal and cause fires. This has reduced the woodland considerably. However large areas of unspoilt habitat remain even outside protected areas, especially compared with the more heavily populated West Sudanian savanna.

Poaching is another problem, indeed the black rhinoceros (Diceros bicornis) and northern white rhinoceros (Ceratotherium simum cottoni) were formerly native to the ecoregion but have been eliminated through over-hunting.

Protected areas

24.68% of the ecoregion is in protected areas. [1] Protected areas include Bouba Njida National Park in Cameroon, Bamingui-Bangoran National Park and Biosphere Reserve, Andre Felix National Park, and Manovo-Gounda St. Floris National Park in the Central African Republic, Zakouma National Park in Chad, Gambella National Park in Ethiopia, Dinder National Park and Radom National Park in Sudan, Boma National Park and Kidepo Game Reserve in South Sudan, and Kidepo Valley National Park in Uganda. [13] [1]

Most protected areas are severely under-resourced, and apart from hunting for sport in the Central African Republic there is little wildlife-based tourism.

See also

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Tropical and subtropical grasslands, savannas, and shrublands is a terrestrial biome defined by the World Wide Fund for Nature. The biome is dominated by grass and/or shrubs located in semi-arid to semi-humid climate regions of subtropical and tropical latitudes. Tropical grasslands are mainly found between 5 degrees and 20 degrees in both North and south of the Equator.

<span class="mw-page-title-main">Moundou</span> Place in Logone Occidental Region, Chad

Moundou is the second-largest city in Chad and is the capital of the region of Logone Occidental.

Sarh, formerly French colonial Fort Archambault, is the capital of the Moyen-Chari Region and of the Department of Barh Köh in Chad.

<span class="mw-page-title-main">Forest–savanna mosaic</span>

Forest–savanna mosaic is a transitory ecotone between the tropical moist broadleaf forests of Equatorial Africa and the drier savannas and open woodlands to the north and south of the forest belt. The forest–savanna mosaic consists of drier forests, often gallery forest, interspersed with savannas and open grasslands.

<span class="mw-page-title-main">Sudanian savanna</span> African region south of the Sahel

The Sudanian savanna or Sudan region is a broad belt of tropical savanna that runs east and west across the African continent, from the Ethiopian Highlands in the east to the Atlantic Ocean in the west. It represents the central bioregion within the broader tropical savanna biome of the Afrotropical realm. The Sahel acacia savanna, a belt of drier grasslands, lies to the north, forming a transition zone between the Sudanian savanna and the Sahara Desert phytochorion. To the Sudan's south, the more humid forest-savanna mosaic forms a transition zone between the Sudanian savanna and the Guineo-Congolian forests that lie nearer the equator.

<span class="mw-page-title-main">Northern Congolian forest–savanna mosaic</span> Forest and savanna ecoregion of Central Africa

The Northern Congolian forest–savanna mosaic is a forest and savanna ecoregion of central Africa. It extends east and west across central Africa, covering parts of Cameroon, Central African Republic, Democratic Republic of the Congo, South Sudan, and Uganda. It is part of the belt of transitional forest-savanna mosaic that lie between Africa's moist equatorial Guineo-Congolian forests and the tropical dry forests, savannas, and grasslands to the north and south.

<span class="mw-page-title-main">Geography of South Sudan</span>

The geography of South Sudan describes the physical features of South Sudan, a country in East Africa. South Sudan is a landlocked country and borders – clockwise – Sudan from the north, Ethiopia from the east, Kenya, Uganda and the Democratic Republic of the Congo from the south and the Central African Republic from the west.

<span class="mw-page-title-main">Mandara Plateau mosaic</span> Ecoregion in the Mandara Mountains, Nigeria-Cameroon

The Mandara Plateau mosaic, also known as the Mandara Plateau woodlands, is a tropical grasslands, savannas, and shrublands ecoregion located in the Mandara Mountains of northern Nigeria and Cameroon.

<span class="mw-page-title-main">West Sudanian savanna</span> Tropical savanna ecoregion across Western Africa

The West Sudanian savanna is a tropical savanna ecoregion that extends across West Africa.

Northern <i>Acacia</i>–<i>Commiphora</i> bushlands and thickets

The Northern AcaciaCommiphora bushlands and thickets are a tropical grasslands, savannas and shrublands ecoregion in eastern Africa. The ecoregion is mostly located in Kenya, extending north into southeastern South Sudan, northeastern Uganda and southwestern Ethiopia and south into Tanzania along the Kenya-Tanzania border.

Somali <i>Acacia</i>–<i>Commiphora</i> bushlands and thickets

The Somali AcaciaCommiphora bushlands and thickets is a semi-arid tropical grasslands, savannas, and shrublands ecoregion in the Horn of Africa. It is home to diverse communities of plants and animals, including several endemic species.

<span class="mw-page-title-main">Victoria Basin forest–savanna mosaic</span>

The Victoria Basin forest–grassland mosaic is an ecoregion that lies mostly in Uganda and extends into neighboring countries. The ecoregion is centered north and west of Lake Victoria, with an outlier on the border of Ethiopia and South Sudan.

References

  1. 1 2 3 "East African savanna". DOPA Explorer. Accessed 5 March 2022
  2. "Garoua Climate Normals 1961–1990". National Oceanic and Atmospheric Administration . Retrieved March 8, 2015.
  3. "World Weather Information Service – Sarh". World Meteorological Organization. Retrieved June 24, 2015.
  4. "Sarh Climate Normals 1961-1990". National Oceanic and Atmospheric Administration . Retrieved June 24, 2015.
  5. "World Weather Information Service – Moundou". World Meteorological Organization. Retrieved June 24, 2015.
  6. "Moundou Climate Normals 1961-1990". National Oceanic and Atmospheric Administration . Retrieved June 24, 2015.
  7. "Climate: Birao". Climate-Data.org. Retrieved August 14, 2019.
  8. "Wau Climate Normals 1961–1990". National Oceanic and Atmospheric Administration . Retrieved January 16, 2015.
  9. "World Weather Information Service – Juba". World Meteorological Organization (UN). Archived from the original on 25 December 2018. Retrieved 21 March 2013.
  10. "Juba Climate Normals 1961–1990". National Oceanic and Atmospheric Administration . Retrieved 18 January 2016.
  11. "Klimatafel von Juba / Sudan" (PDF) (in German). Deutscher Wetterdienst. Retrieved 3 November 2016.
  12. "Damazin Climate Normals 1961–1990". National Oceanic and Atmospheric Administration . Retrieved January 17, 2016.
  13. 1 2 3 "East Sudanian savanna". Terrestrial Ecoregions. World Wildlife Fund.