Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record
The presence of pollen from Yungas tree species in fossil sequences located above the tree-line has led to alternative interpretations of past climate changes in tropical and subtropical Andes. We studied atmospheric and surface pollen deposition rates of Yungas trees along an altitudinal gradient (...
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2019
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v520_n_p66_Torres http://hdl.handle.net/20.500.12110/paper_00310182_v520_n_p66_Torres |
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paper:paper_00310182_v520_n_p66_Torres2023-06-08T14:56:46Z Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record Local wind Palaeoenvironment Pollen tracers Subtropical Andes Vegetation zones altitude atmospheric circulation deciduous tree fossil record mountain region paleoclimate paleoenvironment pollen Quaternary rainforest subtropical region treeline vegetation cover Andes Argentina Alnus Anadenanthera Celtis Juglans Myrtaceae The presence of pollen from Yungas tree species in fossil sequences located above the tree-line has led to alternative interpretations of past climate changes in tropical and subtropical Andes. We studied atmospheric and surface pollen deposition rates of Yungas trees along an altitudinal gradient (1700–3800 m a.s.l.) to understand the role of local wind patterns in modern pollen transport to mountain regions. Pollen from the Montane forest (Alnus and Juglans) and the Montane rainforest (Anadenanthera, Celtis and Myrtaceae) becomes airborne and is transported upslope well above the tree-line. The resulting patterns of pollen deposition show a secondary maximum in the Montane grassland, consistent with the development of a mountain-valley breeze system during the flowering period of the pollen producer species. Given that the pattern is also preserved in the surface sediment, we propose that these tree pollen types are good indicators of mesoscale atmospheric circulation and could provide a proxy for this circulation system in Quaternary records. This alternative approach to interpreting fossil pollen records of Yungas species in highlands of the Central Andes has implications for regional reconstructions of past climate. © 2019 Elsevier B.V. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v520_n_p66_Torres http://hdl.handle.net/20.500.12110/paper_00310182_v520_n_p66_Torres |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Local wind Palaeoenvironment Pollen tracers Subtropical Andes Vegetation zones altitude atmospheric circulation deciduous tree fossil record mountain region paleoclimate paleoenvironment pollen Quaternary rainforest subtropical region treeline vegetation cover Andes Argentina Alnus Anadenanthera Celtis Juglans Myrtaceae |
| spellingShingle |
Local wind Palaeoenvironment Pollen tracers Subtropical Andes Vegetation zones altitude atmospheric circulation deciduous tree fossil record mountain region paleoclimate paleoenvironment pollen Quaternary rainforest subtropical region treeline vegetation cover Andes Argentina Alnus Anadenanthera Celtis Juglans Myrtaceae Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| topic_facet |
Local wind Palaeoenvironment Pollen tracers Subtropical Andes Vegetation zones altitude atmospheric circulation deciduous tree fossil record mountain region paleoclimate paleoenvironment pollen Quaternary rainforest subtropical region treeline vegetation cover Andes Argentina Alnus Anadenanthera Celtis Juglans Myrtaceae |
| description |
The presence of pollen from Yungas tree species in fossil sequences located above the tree-line has led to alternative interpretations of past climate changes in tropical and subtropical Andes. We studied atmospheric and surface pollen deposition rates of Yungas trees along an altitudinal gradient (1700–3800 m a.s.l.) to understand the role of local wind patterns in modern pollen transport to mountain regions. Pollen from the Montane forest (Alnus and Juglans) and the Montane rainforest (Anadenanthera, Celtis and Myrtaceae) becomes airborne and is transported upslope well above the tree-line. The resulting patterns of pollen deposition show a secondary maximum in the Montane grassland, consistent with the development of a mountain-valley breeze system during the flowering period of the pollen producer species. Given that the pattern is also preserved in the surface sediment, we propose that these tree pollen types are good indicators of mesoscale atmospheric circulation and could provide a proxy for this circulation system in Quaternary records. This alternative approach to interpreting fossil pollen records of Yungas species in highlands of the Central Andes has implications for regional reconstructions of past climate. © 2019 Elsevier B.V. |
| title |
Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| title_short |
Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| title_full |
Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| title_fullStr |
Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| title_full_unstemmed |
Altitudinal patterns of wind transport and deposition of Yungas tree pollen in northwestern Argentina: Implications for interpreting the Quaternary fossil record |
| title_sort |
altitudinal patterns of wind transport and deposition of yungas tree pollen in northwestern argentina: implications for interpreting the quaternary fossil record |
| publishDate |
2019 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310182_v520_n_p66_Torres http://hdl.handle.net/20.500.12110/paper_00310182_v520_n_p66_Torres |
| _version_ |
1768546198945267712 |