English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/28009
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorNogué, Sandra-
dc.contributor.authorRull, Valentí-
dc.contributor.authorMontoya, Encarnación-
dc.contributor.authorHuber, Otto-
dc.contributor.authorVegas-Vilarrúbia, Teresa-
dc.date.accessioned2010-09-27T11:54:28Z-
dc.date.available2010-09-27T11:54:28Z-
dc.date.issued2009-
dc.identifier.citationPalaeogeography Palaeoclimatology Palaeoecology 281: 165–173 (2009)en_US
dc.identifier.issn0031-0182-
dc.identifier.urihttp://hdl.handle.net/10261/28009-
dc.description9 p.en_US
dc.description.abstractThe previously recorded vegetation constancy during most of the Holocene, atop some summits of the Guayana tabular mountains (or tepuis), led to the hypotheses of either environmental stability or site insensitivity. As high-mountain biomes are considered to be especially well suited for recording past environmental changes, a palynological study on the uppermost summit of the Chimantá massif was designed to test its suitability for these purposes. A peat sequence was obtained spanning the last ~13.0 cal kyr BP, but an acceptable resolution for paleoecological reconstruction is available only for the last ~4000 years. Around 4.3 cal kyr BP, the modern vegetation was established and has remained virtually unchanged until today; minor paleoenvironmental changes recorded in other sequences around 2.5 cal kyr BP were not detected here. The main paleoclimatic trends are in good agreement with other neotropical records, especially from Lake Valencia and the Cariaco Basin. It is concluded that high-altitude tepuian sites are useful to record paleoenvironmental changes of moderate to high intensity but once a dense vegetation cover is established, gentle shifts remain hidden due to the capacity of plant communities to absorb the changes. The best sites for paleoecological research atop the tepuis are those lying on or near altitudinal ecotones, especially between the meadows and the paramoid shrublands (~2200 m elevation). Sites within the meadow domain, as most well-studied so far, are relatively insensitive to Holocene paleoenvironmental changes.en_US
dc.format.extent1643203 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsclosedAccessen_US
dc.subjectPalynologyen_US
dc.subjectPaleoclimatologyen_US
dc.subjectPaleoecologyen_US
dc.subjectHoloceneen_US
dc.subjectNeotropicsen_US
dc.subjectGuayanaen_US
dc.subjectTepuisen_US
dc.subjectVegetation constancyen_US
dc.titlePaleoecology of the Guayana Highlands (northern South record from the Eruoda-tepui, in the Chimantá massifen_US
dc.typeartículoen_US
dc.identifier.doi10.1016/j.palaeo.2009.07.019-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.palaeo.2009.07.019en_US
Appears in Collections:(IBB) Artículos
Files in This Item:
There are no files associated with this item.
Show simple item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.