Overview

Distribution

Range Description

This species, described in 1999, was originally only known from two sites in south-west Madagascar: Analavelona Massif and Vohibasia, about 70 km apart, and at elevations between 780 and 1,050 m asl. No other records were known until 2006, when two additional specimens were taken in the Menabe region at a notable distance from the sites of the type series and in a different habitat (Soarimalala and Goodman 2007). One specimen was taken in Foret d’Amboropotsy (Kirindy CFPF) and another in the Foret de Lambokely. In February and March 2007, three different sites in the Kirindy-Mitea National Park were surveyed and 198 pit-fall trap days were accrued at each site and no individual of M. nasoloi was captured; further, no sign of this species was found during extensive small mammal surveys in the zone north of the Tsiribihina River (Soarimalala and Goodman 2007).
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Ecology

Habitat

Madagascar Subhumid Forests Habitat

The Lac Alaotra bamboo lemur (Hapalemur griseus aloatrensis) is strictly endemic to the Madagascar subhumid forests ecoregion. This ecoregion, coveris most of the Central Highlands of Madagascar, and boasts a considerable number of endemic species, found chiefly in the relict forest patches and also in some wetland areas. The rainfall here is approximately 1500 mm per year, although it may amount to as much as 2000 mm in the Sambirano area in the northwest and as little as 600 mm in the southwest.

The underlying geology of the ecoregion is mainly ancient Precambrian basement rocks that have been deformed and uplifted over millions of years. There are a few areas of more recent lava flows, and some alluvial deposits associated with wetlands. Vast grasslands now cover much of the central highlands at elevations ranging from 1000 to 1500 metres. The majority of this upland area was formerly forested, and native peoples have affected the fauna and flora through massive deforestation.

Many mammalian taxa are endemic to this ecoregion, including a number of lemurs and numerous shrews, tenrecs and rodents. A far larger number of species are near endemic, with the majority of these shared with the lowland forests to the east. At least 45 species of mammals are found only in the subhumid forest ecoregion and the lowland forest ecoregion of Madagascar and these include, for example, two species of bamboo lemurs (Hapalemur aureus and H. simus).

Of the endemic and near-endemic mammal species in the ecoregion, 12 species listed are on the IUCN Red List; nine species are considered vulnerable; two are endangered and one (the Alaotran gentle lemur) is critical. In the Analavelona forest a species of small mammal was recently discovered, Microgale nasoloi, that is only known from this site and the nearby Zombitse-Vohibasia Forest, the latter being classified in the Madagascar succulent woodlands ecoregion. In addition to the large number of mammalian endemics, there are many special status mammals in the ecoregion, including the Vulnerable Aquatic tenrec (Limnogale mergulus); the Near Threatened Aye aye (Daubentonia madagascariensis);

Two endemic bird species are found in the wetlands of this ecoregion, and others are confined to the subhumid forests or shared with other Madagascar ecoregions. In the wetlands, both the Alaotra little grebe (Tachybaptus rufolavatus) and the Madagascar pochard (Aythya innotata), are considered critically endangered and may be extinct. In the forests the endemic species include, for example, a new genus and species only named a few years ago called the cryptic warbler (Cryptosylvicola randrianasoloi), the yellow-browed oxylabes (Crossleyia xanthophrys), and the brown emutail (Dromaeocercus brunneus). Several other species of birds found here are limited to marshland habitats on Madagascar, including the slender-billed flufftail (Sarothrura watersi), Madagascar snipe (Gallinago macrodactyla), and Madagascar rail (Rallus madagascariensis). Further, Appert’s greenbul (Xanthomixis apperti), an endemic species with a very limited geographical distribution, is abundant on the upper reaches of the Analavelona Massif. More than 20 other bird species that occur in the subhumid forests of this ecoregion are shared only with the eastern lowland forests ecoregion.

The Madagascar subhumid forests hold more than twenty strictly endemic amphibians. Several groups of amphibians include more than one endemic species, such as the microhylids Rhombophryne testudo, Scaphiophryne goettliebi, the mantellids Vulnerable Elegant Madagascar frog (Spinomantis elegans); Mantella crocea, M. cowani, M. eiselti, Mantidactylus domerguei, and the Near Threatened Decary's Madagascar frog (Gephiyromantis decaryi); and the rhacophorids Boophis laurenti and B. microtympanum. Other notable amphibian endemics include:the Benavony stump-toed frog (Stumpffia gimmeli)/

There are a number of special status amphibians in the ecoregion including the Near Threatened Ambohimitombo bright-eyed frog (Boophis majori); the Vulnerable Andoany stump-toed frog (Stumpffia pygmaea); the Endangered Andringitra Madagascar Frog (Mantidactylus madecassus); and the Near Threatened Betsileo Bright-eyed Frog (Boophis rhodoscelis).

There are at least 25 strictly endemic reptiles in this ecoregion. These numbers include historically described species as well as newly identified taxa. Numerous speciess of chameleon and dwarf chameleon only occur in this ecoregion, including Calumma oshaughnessyi ambreensis, C. tsaratananensis, Furcifer petteri, Brookesia ambreesis, B. antakarana, B. lineata, and B. lolontany in the northern and northwestern portion; and C. fallax, F. campani, and F. minor in the central and southern portions. Otpher lizard species endemic to the ecoregion include the skinks Mabuya grnadidieri, M. madagascariensis, M. nancycoutouae, Amphiglossus meva, and Androngo crenni; the geckos Lygodactylus blanciL. decaryi and Phelsuma klemmeri, and the Plated lizard Zonosaurus ornatus. There are also a few endemic species of snakes including Pseudoxyrhopus ankafinensis, Liopholidophis grandidieri, and L. sexlineatus.


  • Du Puy, D.J. and Moat, J. 1996. A refined classification of the primary vegetation of Madagascar based on the underlying geology: using GIS to map its distribution and to assess its conservation status. In W.R. Lourenço (editor). Biogéographie de Madagascar, pp. 205-218, + 3 maps. Editions de l’ORSTOM, Paris. ISBN: 2709913240
  • World Wildlife Fund and C.MIchael Hogan/. 2015. Madagascar subhumid forests. Encyclopedia of Earth. National Council for Science and Environment. Washington DC
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Habitat and Ecology

Habitat and Ecology
It is a scansorial species that is apparently restricted to transitional dry deciduous forests (Vohibasia) and dry sclerophyllous montane forest (Analavelona) (Jenkins and Goodman 1999). The forest habitat where M. nasoloi was captured in the Menabe region is a seasonally dry deciduous habitat and distinctly more mesic than the Zombitse-Vohibasia zone (Soarimalala and Goodman 2007).

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
B1ab(iii)

Version
3.1

Year Assessed
2008

Assessor/s
Jenkins, P. & Goodman, S. (IUCN SSC Afrotheria Specialist Group - Tenrec Section)

Reviewer/s
Rathbun, G. (Afrotheria Red List Authority) & Hoffmann, M. (Global Mammal Assessment Team)

Contributor/s

Justification
Listed as Vulnerable because its total possible extent of occurrence is less than 20,000 km², it is currently known only from four distinct localities, and there is continuing decline in the extent and quality of its habitat.

History
  • 2006
    Endangered
    (IUCN 2006)
  • 2006
    Endangered
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Population

Population
It is known only from four specimens (Soarimalala and Goodman 2007).

Population Trend
Decreasing
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Threats

Major Threats
It is threatened by deforestation through pastoral use and fires.
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Management

Conservation Actions

Conservation Actions
It has been recorded from the Zombitse-Vohibasia National Park, the well-protected sacred forest at Analavelona, and the Kirindy CFPF area. Further research is needed into the population numbers, range, habitat and biology and threats to this species. Further information on distribution may suggest the expansion of protected areas (S.M. Goodman pers. comm.).
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Wikipedia

Nasolo's shrew tenrec

Nasolo's shrew tenrec (Microgale nasoloi) is a species of mammal in the Tenrecidae family. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.[2]

References

  1. ^ Bronner, G. N.; Jenkins, P. D. (2005). "Order Afrosoricida". In Wilson, D. E.; Reeder, D. M. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. pp. 74. ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3.
  2. ^ a b Afrotheria Specialist Group (Tenrec Section), Jenkins, P. & Goodman, S. (2008). Microgale nasoloi. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 29 December 2008.
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