Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/102330
Title: Late Holocene vegetation dynamics and deforestation in Rano Aroi: implications for Easter Island's ecological and cultural history
Author: Rull del Castillo, Valentí
Cañellas Boltà, Núria
Margalef Marrasé, Olga
Sáez, Alberto
Pla Rabés, Sergi
Giralt Romeu, Santiago
Keywords: Paleoclimatologia
Holocè
Paleoecologia
Pasqua (Xile : Illa)
Paleoclimatology
Holocene
Paleoecology
Easter Island (Chile)
Issue Date: Oct-2015
Publisher: Elsevier Ltd
Abstract: Easter Island (Rapa Nui) has been considered an example of how societies can cause their own destruction through the overexploitation of natural resources. The flagship of this ecocidal paradigm is the supposed abrupt, island-wide deforestation that occurred about one millennium ago, a few centuries after the arrival of Polynesian settlers to the island. Other hypotheses attribute the forest demise to different causes such as fruit consumption by rats or aridity but the occurrence of an abrupt, island-wide deforestation during the last millennium has become paradigmatic in Rapa Nui. We argue that such a view can be questioned, as it is based on the palynological study of incomplete records, owing to the existence of major sedimentary gaps. Here, we present a multiproxy (pollen, charcoal and geochemistry) study of the Aroi core, the first gap-free sedimentary sequence of the last millennia obtained to date in the island. Our results show changing vegetation patterns under the action of either climatic or anthropogenic drivers, or both, depending on the time interval considered. Palm forests were present in Aroi until the 16th century, when deforestation started, coinciding with fire exacerbation elikely of human origine and a dry climate. This is the latest deforestation event recorded so far in the island and took place roughly a century before European contact. In comparison to other Easter Island records, this record shows that deforestation was neither simultaneous nor proceeded at the same pace over the whole island. These findings suggest that Easter Island's deforestation was a heterogeneous process in space and time, and highlights the relevance of local catchment traits in the island's environmental and land management history.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.quascirev.2015.09.008
It is part of: Quaternary Science Reviews, 2015, vol. 126, p. 219-226
Related resource: http://dx.doi.org/10.1016/j.quascirev.2015.09.008
URI: http://hdl.handle.net/2445/102330
ISSN: 0277-3791
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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