Limits...
Extinction risks and the conservation of Madagascar's reptiles.

Jenkins RK, Tognelli MF, Bowles P, Cox N, Brown JL, Chan L, Andreone F, Andriamazava A, Andriantsimanarilafy RR, Anjeriniaina M, Bora P, Brady LD, Hantalalaina EF, Glaw F, Griffiths RA, Hilton-Taylor C, Hoffmann M, Katariya V, Rabibisoa NH, Rafanomezantsoa J, Rakotomalala D, Rakotondravony H, Rakotondrazafy NA, Ralambonirainy J, Ramanamanjato JB, Randriamahazo H, Randrianantoandro JC, Randrianasolo HH, Randrianirina JE, Randrianizahana H, Raselimanana AP, Rasolohery A, Ratsoavina FM, Raxworthy CJ, Robsomanitrandrasana E, Rollande F, van Dijk PP, Yoder AD, Vences M - PLoS ONE (2014)

Bottom Line: Nine threatened reptile species are endemic to recently created protected areas.With a few alarming exceptions, the threatened endemic reptiles of Madagascar occur within the national network of protected areas, including some taxa that are only found in new protected areas.Threats to these species, however, operate inside and outside protected area boundaries.

View Article: PubMed Central - PubMed

Affiliation: Global Species Programme, IUCN, Cambridge, United Kingdom.

ABSTRACT

Background: An understanding of the conservation status of Madagascar's endemic reptile species is needed to underpin conservation planning and priority setting in this global biodiversity hotspot, and to complement existing information on the island's mammals, birds and amphibians. We report here on the first systematic assessment of the extinction risk of endemic and native non-marine Malagasy snakes, lizards, turtles and tortoises.

Methodology/principal findings: Species range maps from The IUCN Red List of Threatened Species were analysed to determine patterns in the distribution of threatened reptile species. These data, in addition to information on threats, were used to identify priority areas and actions for conservation. Thirty-nine percent of the data-sufficient Malagasy reptiles in our analyses are threatened with extinction. Areas in the north, west and south-east were identified as having more threatened species than expected and are therefore conservation priorities. Habitat degradation caused by wood harvesting and non-timber crops was the most pervasive threat. The direct removal of reptiles for international trade and human consumption threatened relatively few species, but were the primary threats for tortoises. Nine threatened reptile species are endemic to recently created protected areas.

Conclusions/significance: With a few alarming exceptions, the threatened endemic reptiles of Madagascar occur within the national network of protected areas, including some taxa that are only found in new protected areas. Threats to these species, however, operate inside and outside protected area boundaries. This analysis has identified priority sites for reptile conservation and completes the conservation assessment of terrestrial vertebrates in Madagascar which will facilitate conservation planning, monitoring and wise-decision making. In sharp contrast with the amphibians, there is significant reptile diversity and regional endemism in the southern and western regions of Madagascar and this study highlights the importance of these arid regions to conserving the island's biodiversity.

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Related in: MedlinePlus

Percentage of reptile species' range represented in all Madagascar Protected Areas by IUCN Red List Category.Dotted line indicates grand mean and black short lines indicate mean percentage of range protected in each IUCN Red List Category.
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pone-0100173-g005: Percentage of reptile species' range represented in all Madagascar Protected Areas by IUCN Red List Category.Dotted line indicates grand mean and black short lines indicate mean percentage of range protected in each IUCN Red List Category.

Mentions: On average, almost 40% of the geographic range of Malagasy reptiles is within some form of protected areas (Figure 5). Among threatened species, the coverage is variable, being lowest for Critically Endangered and Vulnerable species. Based on this study, only four Critically Endangered (Calumma hafahafa, Phelsuma masohoala, P. pronki and Pseudoxyrhopus ankafinaensis) and one Endangered (Lygodactylus ornatus) species are not represented in any formal protected area (Figure 6). However, a further nine Critically Endangered species are included within the network only through their presence in recently established, or provisional, protected areas (C. tarzan, F. belalandaensis, L. mirabilis, Paracontias fasika, P. rothschildi, P. minimus, Xenotyphlops grandidieri, Phelsuma antanosy and Pseudoacontias menamainty).


Extinction risks and the conservation of Madagascar's reptiles.

Jenkins RK, Tognelli MF, Bowles P, Cox N, Brown JL, Chan L, Andreone F, Andriamazava A, Andriantsimanarilafy RR, Anjeriniaina M, Bora P, Brady LD, Hantalalaina EF, Glaw F, Griffiths RA, Hilton-Taylor C, Hoffmann M, Katariya V, Rabibisoa NH, Rafanomezantsoa J, Rakotomalala D, Rakotondravony H, Rakotondrazafy NA, Ralambonirainy J, Ramanamanjato JB, Randriamahazo H, Randrianantoandro JC, Randrianasolo HH, Randrianirina JE, Randrianizahana H, Raselimanana AP, Rasolohery A, Ratsoavina FM, Raxworthy CJ, Robsomanitrandrasana E, Rollande F, van Dijk PP, Yoder AD, Vences M - PLoS ONE (2014)

Percentage of reptile species' range represented in all Madagascar Protected Areas by IUCN Red List Category.Dotted line indicates grand mean and black short lines indicate mean percentage of range protected in each IUCN Red List Category.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4128600&req=5

pone-0100173-g005: Percentage of reptile species' range represented in all Madagascar Protected Areas by IUCN Red List Category.Dotted line indicates grand mean and black short lines indicate mean percentage of range protected in each IUCN Red List Category.
Mentions: On average, almost 40% of the geographic range of Malagasy reptiles is within some form of protected areas (Figure 5). Among threatened species, the coverage is variable, being lowest for Critically Endangered and Vulnerable species. Based on this study, only four Critically Endangered (Calumma hafahafa, Phelsuma masohoala, P. pronki and Pseudoxyrhopus ankafinaensis) and one Endangered (Lygodactylus ornatus) species are not represented in any formal protected area (Figure 6). However, a further nine Critically Endangered species are included within the network only through their presence in recently established, or provisional, protected areas (C. tarzan, F. belalandaensis, L. mirabilis, Paracontias fasika, P. rothschildi, P. minimus, Xenotyphlops grandidieri, Phelsuma antanosy and Pseudoacontias menamainty).

Bottom Line: Nine threatened reptile species are endemic to recently created protected areas.With a few alarming exceptions, the threatened endemic reptiles of Madagascar occur within the national network of protected areas, including some taxa that are only found in new protected areas.Threats to these species, however, operate inside and outside protected area boundaries.

View Article: PubMed Central - PubMed

Affiliation: Global Species Programme, IUCN, Cambridge, United Kingdom.

ABSTRACT

Background: An understanding of the conservation status of Madagascar's endemic reptile species is needed to underpin conservation planning and priority setting in this global biodiversity hotspot, and to complement existing information on the island's mammals, birds and amphibians. We report here on the first systematic assessment of the extinction risk of endemic and native non-marine Malagasy snakes, lizards, turtles and tortoises.

Methodology/principal findings: Species range maps from The IUCN Red List of Threatened Species were analysed to determine patterns in the distribution of threatened reptile species. These data, in addition to information on threats, were used to identify priority areas and actions for conservation. Thirty-nine percent of the data-sufficient Malagasy reptiles in our analyses are threatened with extinction. Areas in the north, west and south-east were identified as having more threatened species than expected and are therefore conservation priorities. Habitat degradation caused by wood harvesting and non-timber crops was the most pervasive threat. The direct removal of reptiles for international trade and human consumption threatened relatively few species, but were the primary threats for tortoises. Nine threatened reptile species are endemic to recently created protected areas.

Conclusions/significance: With a few alarming exceptions, the threatened endemic reptiles of Madagascar occur within the national network of protected areas, including some taxa that are only found in new protected areas. Threats to these species, however, operate inside and outside protected area boundaries. This analysis has identified priority sites for reptile conservation and completes the conservation assessment of terrestrial vertebrates in Madagascar which will facilitate conservation planning, monitoring and wise-decision making. In sharp contrast with the amphibians, there is significant reptile diversity and regional endemism in the southern and western regions of Madagascar and this study highlights the importance of these arid regions to conserving the island's biodiversity.

Show MeSH
Related in: MedlinePlus