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Holocene vegetation history from fossil rodent middens near Arequipa, Peru

Auteurs :
HOLMGREN, C.A.
BETANCOURT, J.L.
RYLANDER, K.A.
ROQUE, J.
TOVAR, O.
ZEBALLOS, H.
LINARES, E.
QUADE, J.

Description :
Rodent middens collected from 2350 to 2750 m elevation near Arequipa, provide an 9600-yr vegetation history of the northern Atacama Desert, based on identification of >50 species of plant macrofossils. These midden floras show considerable stability throughout the Holocene, with slightly more mesophytic plant assemblages in the middle Holocene. In the Arequipa area, the midden record does not reflect any effects of a mid-Holocene mega drought proposed from the extreme lowstand of Lake Titicaca, only 200 km east of Arequipa. The apparent difference in paleoclimatic reconstructions suggests that it is premature to relate changes observed during the Holocene to changes in El Niño Southern Oscillation modes.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2001, vol. 56, n°. 2, p. 242-251, nombre de pages : 10, Collation : Illustration, Références bibliographiques : 33 ref.

Date :
2001

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier

Langue :
Anglais
Droits :
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