Environmental change, extinction and human activity: evidence from caves in NW Madagascar


Material Information

Environmental change, extinction and human activity: evidence from caves in NW Madagascar
Series Title:
Journal of Biogeography
Burney, David
James, Helen
Grady, Frederick
Rafamantanantsoa, Jean-Gervais
Wright, Henry T.
Cowart, James
Blackwell Science, Ltd
Publication Date:


Subjects / Keywords:
Madagascar ( local )
Extinctions ( local )
Human Impacts ( local )
Caves ( local )
Paleobiogeography ( local )
Les Disparitions ( local )
Les Impactes Humains ( local )
Les Grottes ( local )
Paléobiogéographie ( local )
serial ( sobekcm )


In the last 2000 years, changes on the island of Madagascar have resulted in the modification of key environments and the extinction of nearly all large native animals. Humans have long been suspected as the primary cause of this ecological catastrophe, but the exact mechanisms of the island's rapid transformation and the role of natural factors such as climate change remain uncertain. Caves in northwestern Madagascar are helping researchers to disentangle these factors, by providing many types of datable information concerning the past in close physical proximity. U‐series dated pollen spectra from the caverns of Anjohibe provide a 40,000‐year record of vegetation in the vicinity. Bone deposits from caves in the region provide new site records for extinct taxa, including Babakotia radofilai Godfrey et al. 1990, Plesiorycteropus madagascariensis Filhol 1895, and Mullerornis sp. Several extant taxa that were present in the region in the late Holocene are now locally extinct. Archaeological evidence from the caves suggests little or no human activity in the vicinity or interaction with the fauna at these sites until recent centuries.
Original Version:
Journal of Biogeography, Vol. 24, no. 6 (2003-10-31).

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