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Eco-187: Madagascar succulent woodlands

Source: Wikipedia
Madagascar succulent woodlands
Tall baobab trees on the edge of a sand track at sunset
Avenue of the Baobabs near Morondava
Map showing location of the succulent woodlands ecoregion in the southwest and centre-west of Madagascar
Ecology
RealmAfrotropical
BiomeDeserts and xeric shrublands
Borders
AnimalsStanding's day gecko, flat-backed spider tortoise
Bird speciesAppert's greenbul
Mammal speciesMalagasy giant rat, Madame Berthe's mouse lemur, Verreaux's sifaka, narrow-striped mongoose
Geography
Area79,700 km2 (30,800 sq mi)
CountryMadagascar
Elevation0–600 metres (0–1,969 ft)
Coordinates22°36′S 44°36′E / 22.600°S 44.600°E / -22.600; 44.600
GeologySands, sandstone, limestone, metamorphic, and igneous basement rocks
Climate typeHot semi-arid climate (BSh)
Soil typesSandy
Conservation
Conservation statusCritical, endangered
Protected4.63%[1]

The Madagascar succulent woodlands are a xeric shrublands ecoregion in southwestern and central western Madagascar. Native plants survive in the arid climate and long dry season with adaptations like succulent leaves, water storing trunks, photosynthetic stems, and dropping leaves during the dry season. The ecoregion is threatened by various human activities.

Geography

The succulent woodlands are found in the southwest and centre-west of Madagascar, in the rain shadow region that receives less moisture than the east and the Central Highlands. The climate is tropical and dry, with rainfall ranging from 575 to 1,330 mm per year, and a marked dry season from May to October.[2]

To the north, the succulent woodlands make a transition into the Madagascar dry deciduous forests, while to the south they border the even drier Madagascar spiny thickets, and to the east the Madagascar subhumid forests. They are bounded on the west by the Mozambique Channel.[2]

Flora

The vegetation is similar to the dry deciduous forests to the north, but includes more dry-adapted, xerophytic species. Forests and open-canopied woodlands, reaching 15 metres (49 ft) in height, contain trees and shrubs of the families Burseraceae, Euphorbiaceae, Fabaceae, and Sapindaceae. Notable endemic and near-endemic plants include two species of baobab, Adansonia za and A. grandidieri (near threatened and endangered, respectively), the endemic tree hazomalany (Hazomalania voyronii), and succulents in the genus Pachypodium.[2]

Fauna

Between 60 and 90 bird species and eight lemur species are found in the ecoregion and a number of mammals, frogs, and reptiles are endemic to the area.[2]

Native mammals include the red-tailed sportive lemur (Lepilemur ruficaudatus), large-eared tenrec (Geogale aurita), lesser hedgehog tenrec (Echinops telfairi), and Verreaux's sifaka (Propithecus verreauxi verreauxi). Endemic mammals include the narrow-striped mongoose (Mungotictis decemlineata), Malagasy giant rat (Hypogeomys antimena), and endangered Madame Berthe's mouse lemur (Microcebus berthae),[2] the world's smallest primate.[3]

Native limited-range birds include the red-capped coua (Coua ruficeps), Appert's greenbul (Xanthomixis apperti), white-breasted mesite (Mesitornis variegatus), and long-tailed ground roller (Uratelorinis chimaera).[2]

Threats and conservation

The Madagascar succulent woodlands are threatened by burning, logging (which impacts species such as the endemic tree Hazomalania voyronii), cattle and goat farming, and hunting of several mammals.[2]

4.63% of the ecoregion is in protected areas. Protected areas include Zombitse-Vohibasia National Park, Kirindy Mitea National Park, Andranomena Special Reserve, and Beza Mahafaly Special Reserve.[1][2]

The Menabe Antimena protected area, located in the west of the ecoregion, includes the northern portion of the Kirindy Forest. Large areas have been illegally logged, burned, and converted to maize fields, which threatens the area's wildlife, including Madame Berthe's mouse lemur.[4]

See also

References

  1. 1 2 Madagascar succulent woodlands. DOPA Explorer. Accessed 7 September 2022.
  2. 1 2 3 4 5 6 7 8 Crowley, H. (2004). "114 – Madagascar Succulent Woodlands". In Burgess, N.; D'Amico Hales, J.; Underwood, E.; et al. (eds.). Terrestrial Ecoregions of Africa and Madagascar: A Conservation Assessment (PDF). World Wildlife Fund Ecoregion Assessments (2nd ed.). Washington D.C.: Island Press. pp. 417–418. ISBN 978-1559633642. Archived from the original (PDF) on 2016-11-01.
  3. ↑ Goodman, S.M.; Ganzhorn, J.U.; Rakotondravony, D. (2003). "Introduction to the Mammals". In Goodman, S.M.; Benstead, J.P. (eds.). The Natural History of Madagascar. Chicago, London: The University of Chicago Press. pp. 1159–1190. ISBN 978-0226303062.
  4. ↑ Ratsimbazafy, Rondro (6 September 2019). "Madagascar forest destruction wiping out humans' tiniest relative". Reuters. Retrieved 9 September 2022.