Potential suitable areas of giant ground sloths dropped before its extinction in South America: the evidences from bioclimatic envelope modeling

Matheus Souza  Lima-Ribeiro; Sara Varela; David Bravo Nogues; José Alexandre Felizola Diniz-Filho

doi:10.4322/natcon.2012.022

Potential suitable areas of giant ground sloths dropped before its extinction in South America: the evidences from bioclimatic envelope modeling

Matheus Souza Lima-Ribeiro, Sara Varela, David Bravo Nogues, José Alexandre Felizola Diniz-Filho

Ecology and Evolution

14 Citationer (Scopus)

71 Downloads (Pure)

Abstract

Here we analyze the effects that climatic changes through last ice age had on the potential distributions and extinction risk
dynamics of two extinct species of South American giant ground sloths, Eremotherium laurillardi and Megatherium americanum.
We tested the assumption of stability of the climate preferences through time for the two species and modeled their potential
distributions at last glacial maximum (LGM, 21 ky BP) and mid-Holocene (6 ky BP) using Bioclimatic Envelope Modeling (BEM),
fossil records and paleoclimatic simulations. The model predictions showed a drastic reduction of the geographical ranges for
both species during mid-Holocene, along with a considerable fragmentation of their core climatic conditions and refugia, although
it did not fully disappear at this time. Thus, our findings point out that the extinction risk of both species greatly increased as a
consequence of the climate change, although do not support it as the unique stressor

Originalsprog	Engelsk
Tidsskrift	Natureza & Conservacao
Vol/bind	10
Udgave nummer	2
Sider (fra-til)	145-151
Antal sider	7
ISSN	1679-0073
DOI	https://doi.org/10.4322/natcon.2012.022
Status	Udgivet - 2012

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10.4322/natcon.2012.022Licens: CC BY-NC-ND

Lima-Ribeiro_2012_Potential_suitable_areasForlagets udgivne version, 1,39 MBLicens: CC BY-NC-ND

Citationsformater

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title = "Potential suitable areas of giant ground sloths dropped before its extinction in South America: the evidences from bioclimatic envelope modeling",

abstract = "Here we analyze the effects that climatic changes through last ice age had on the potential distributions and extinction risk dynamics of two extinct species of South American giant ground sloths, Eremotherium laurillardi and Megatherium americanum. We tested the assumption of stability of the climate preferences through time for the two species and modeled their potential distributions at last glacial maximum (LGM, 21 ky BP) and mid-Holocene (6 ky BP) using Bioclimatic Envelope Modeling (BEM), fossil records and paleoclimatic simulations. The model predictions showed a drastic reduction of the geographical ranges for both species during mid-Holocene, along with a considerable fragmentation of their core climatic conditions and refugia, although it did not fully disappear at this time. Thus, our findings point out that the extinction risk of both species greatly increased as a consequence of the climate change, although do not support it as the unique stressor",

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T2 - the evidences from bioclimatic envelope modeling

AU - Lima-Ribeiro, Matheus Souza

AU - Varela, Sara

AU - Nogues, David Bravo

AU - Diniz-Filho, José Alexandre Felizola

PY - 2012

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N2 - Here we analyze the effects that climatic changes through last ice age had on the potential distributions and extinction risk dynamics of two extinct species of South American giant ground sloths, Eremotherium laurillardi and Megatherium americanum. We tested the assumption of stability of the climate preferences through time for the two species and modeled their potential distributions at last glacial maximum (LGM, 21 ky BP) and mid-Holocene (6 ky BP) using Bioclimatic Envelope Modeling (BEM), fossil records and paleoclimatic simulations. The model predictions showed a drastic reduction of the geographical ranges for both species during mid-Holocene, along with a considerable fragmentation of their core climatic conditions and refugia, although it did not fully disappear at this time. Thus, our findings point out that the extinction risk of both species greatly increased as a consequence of the climate change, although do not support it as the unique stressor

AB - Here we analyze the effects that climatic changes through last ice age had on the potential distributions and extinction risk dynamics of two extinct species of South American giant ground sloths, Eremotherium laurillardi and Megatherium americanum. We tested the assumption of stability of the climate preferences through time for the two species and modeled their potential distributions at last glacial maximum (LGM, 21 ky BP) and mid-Holocene (6 ky BP) using Bioclimatic Envelope Modeling (BEM), fossil records and paleoclimatic simulations. The model predictions showed a drastic reduction of the geographical ranges for both species during mid-Holocene, along with a considerable fragmentation of their core climatic conditions and refugia, although it did not fully disappear at this time. Thus, our findings point out that the extinction risk of both species greatly increased as a consequence of the climate change, although do not support it as the unique stressor

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DO - 10.4322/natcon.2012.022

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