Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods
We compare eight pollen records reflecting climatic and environmental change from northern and southern sites in the tropical Andes. Our analysis focuses on the last 30 000 years, with particular emphasis on the Pleistocene to Holocene transition. We explore ecological grouping and downcore ordinati...
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Online Access: | https://archimer.ifremer.fr/doc/00421/53285/54277.pdf https://archimer.ifremer.fr/doc/00421/53285/54278.pdf https://doi.org/10.5194/cp-12-697-2016 https://archimer.ifremer.fr/doc/00421/53285/ |
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ftarchimer:oai:archimer.ifremer.fr:53285 2023-05-15T16:30:02+02:00 Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods Urrego, Dunia H. Hooghiemstra, Henry Rama-corredor, Oscar Martrat, Belen Grimalt, Joan O. Thompson, Lonnie Bush, Mark B. Gonzalez-carranza, Zaire Hanselman, Jennifer Valencia, Bryan Velasquez-ruiz, Cesar 2016 application/pdf https://archimer.ifremer.fr/doc/00421/53285/54277.pdf https://archimer.ifremer.fr/doc/00421/53285/54278.pdf https://doi.org/10.5194/cp-12-697-2016 https://archimer.ifremer.fr/doc/00421/53285/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00421/53285/54277.pdf https://archimer.ifremer.fr/doc/00421/53285/54278.pdf doi:10.5194/cp-12-697-2016 https://archimer.ifremer.fr/doc/00421/53285/ Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use CC-BY Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2016 , Vol. 12 , N. 3 , P. 697-711 text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.5194/cp-12-697-2016 2021-09-23T20:30:28Z We compare eight pollen records reflecting climatic and environmental change from northern and southern sites in the tropical Andes. Our analysis focuses on the last 30 000 years, with particular emphasis on the Pleistocene to Holocene transition. We explore ecological grouping and downcore ordination results as two approaches for extracting environmental variability from pollen records. We also use the records of aquatic and shoreline vegetation as markers for lake level fluctuations and moisture availability. Our analysis focuses on the signature of millennial-scale climate variability in the tropical Andes, in particular Heinrich stadials (HS) and Greenland interstadials (GI). The pollen records show an overall warming trend during the Pleistocene-Holocene transition, but the onset of post-glacial warming differs in timing among records. We identify rapid responses of the tropical vegetation to millennial-scale climate variability. The signatures of HS and the Younger Dryas are generally recorded as downslope upper forest line (UFL) migrations in our transect, and are likely linked to air temperature cooling. The GI1 signal is overall comparable between northern and southern records and indicates upslope UFL migrations and warming in the tropical Andes. Our marker for lake level changes indicated a north-to-south difference that could be related to moisture availability. The air temperature signature recorded by the Andean vegetation was consistent with millennial-scale cryosphere and sea surface temperature changes but suggests a potential difference between the magnitude of temperature change in the ocean and the atmosphere. We also show that arboreal pollen percentage (AP %) and detrended correspondence analysis (DCA) scores are two complementary approaches to extract environmental variability from pollen records. Article in Journal/Newspaper Greenland Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Climate of the Past 12 3 697 711 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We compare eight pollen records reflecting climatic and environmental change from northern and southern sites in the tropical Andes. Our analysis focuses on the last 30 000 years, with particular emphasis on the Pleistocene to Holocene transition. We explore ecological grouping and downcore ordination results as two approaches for extracting environmental variability from pollen records. We also use the records of aquatic and shoreline vegetation as markers for lake level fluctuations and moisture availability. Our analysis focuses on the signature of millennial-scale climate variability in the tropical Andes, in particular Heinrich stadials (HS) and Greenland interstadials (GI). The pollen records show an overall warming trend during the Pleistocene-Holocene transition, but the onset of post-glacial warming differs in timing among records. We identify rapid responses of the tropical vegetation to millennial-scale climate variability. The signatures of HS and the Younger Dryas are generally recorded as downslope upper forest line (UFL) migrations in our transect, and are likely linked to air temperature cooling. The GI1 signal is overall comparable between northern and southern records and indicates upslope UFL migrations and warming in the tropical Andes. Our marker for lake level changes indicated a north-to-south difference that could be related to moisture availability. The air temperature signature recorded by the Andean vegetation was consistent with millennial-scale cryosphere and sea surface temperature changes but suggests a potential difference between the magnitude of temperature change in the ocean and the atmosphere. We also show that arboreal pollen percentage (AP %) and detrended correspondence analysis (DCA) scores are two complementary approaches to extract environmental variability from pollen records. |
format |
Article in Journal/Newspaper |
author |
Urrego, Dunia H. Hooghiemstra, Henry Rama-corredor, Oscar Martrat, Belen Grimalt, Joan O. Thompson, Lonnie Bush, Mark B. Gonzalez-carranza, Zaire Hanselman, Jennifer Valencia, Bryan Velasquez-ruiz, Cesar |
spellingShingle |
Urrego, Dunia H. Hooghiemstra, Henry Rama-corredor, Oscar Martrat, Belen Grimalt, Joan O. Thompson, Lonnie Bush, Mark B. Gonzalez-carranza, Zaire Hanselman, Jennifer Valencia, Bryan Velasquez-ruiz, Cesar Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
author_facet |
Urrego, Dunia H. Hooghiemstra, Henry Rama-corredor, Oscar Martrat, Belen Grimalt, Joan O. Thompson, Lonnie Bush, Mark B. Gonzalez-carranza, Zaire Hanselman, Jennifer Valencia, Bryan Velasquez-ruiz, Cesar |
author_sort |
Urrego, Dunia H. |
title |
Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
title_short |
Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
title_full |
Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
title_fullStr |
Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
title_full_unstemmed |
Millennial-scale vegetation changes in the tropical Andes using ecological grouping and ordination methods |
title_sort |
millennial-scale vegetation changes in the tropical andes using ecological grouping and ordination methods |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00421/53285/54277.pdf https://archimer.ifremer.fr/doc/00421/53285/54278.pdf https://doi.org/10.5194/cp-12-697-2016 https://archimer.ifremer.fr/doc/00421/53285/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2016 , Vol. 12 , N. 3 , P. 697-711 |
op_relation |
https://archimer.ifremer.fr/doc/00421/53285/54277.pdf https://archimer.ifremer.fr/doc/00421/53285/54278.pdf doi:10.5194/cp-12-697-2016 https://archimer.ifremer.fr/doc/00421/53285/ |
op_rights |
Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-12-697-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
3 |
container_start_page |
697 |
op_container_end_page |
711 |
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1766019752265777152 |