Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co
The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local enviro...
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Online Access: | https://doi.org/10.5194/cp-14-1543-2018 https://cp.copernicus.org/articles/14/1543/2018/ |
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fttriple:oai:gotriple.eu:DrhJ4gFJDcc6D25CJ2o4v 2023-05-15T16:39:24+02:00 Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben Villoslada Hidalgo, Maria del Carmen Bird, Broxton W. Barbante, Carlo 2019-01-24 https://doi.org/10.5194/cp-14-1543-2018 https://cp.copernicus.org/articles/14/1543/2018/ en eng Copernicus Publications doi:10.5194/cp-14-1543-2018 10670/1.hf2jm2 1814-9324 1814-9332 https://cp.copernicus.org/articles/14/1543/2018/ undefined Geographica Helvetica - geography eISSN: 1814-9332 anthro-bio envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/cp-14-1543-2018 2023-01-22T17:39:26Z The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local environmental change on millennial scales during the Holocene through the accumulation and preservation of specific organic molecular biomarkers. To reconstruct Holocene fire events and vegetation changes occurring on the southeastern Tibetan Plateau and the surrounding areas, we used a multi-proxy approach, investigating multiple biomarkers preserved in core sediment samples retrieved from Paru Co, a small lake located in the Nyainqentanglha Mountains (29∘47′45.6 ′′ N, 92∘21′07.2 ′′ E; 4845 m a.s.l.). Biomarkers include n-alkanes as indicators of vegetation, polycyclic aromatic hydrocarbons (PAHs) as combustion proxies, fecal sterols and stanols (FeSts) as indicators of the presence of humans or grazing animals, and finally monosaccharide anhydrides (MAs) as specific markers of vegetation burning processes. Insolation changes and the associated influence on the Indian summer monsoon (ISM) affect the vegetation distribution and fire types recorded in Paru Co throughout the Holocene. The early Holocene (10.7–7.5 cal kyr BP) n-alkane ratios demonstrate oscillations between grass and conifer communities, resulting in respective smouldering fires represented by levoglucosan peaks, and high-temperature fires represented by high-molecular-weight PAHs. Forest cover increases with a strengthened ISM, where coincident high levoglucosan to mannosan (L ∕ M) ratios are consistent with conifer burning. The decrease in the ISM at 4.2 cal kyr BP corresponds with the expansion of regional civilizations, although the lack of human FeSts above the method detection limits excludes local anthropogenic influence on fire and vegetation changes. The late Holocene is characterized by a relatively shallow lake surrounded by grassland, where all ... Article in Journal/Newspaper ice core Unknown Indian Climate of the Past 14 10 1543 1563 |
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language |
English |
topic |
anthro-bio envir |
spellingShingle |
anthro-bio envir Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben Villoslada Hidalgo, Maria del Carmen Bird, Broxton W. Barbante, Carlo Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
topic_facet |
anthro-bio envir |
description |
The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local environmental change on millennial scales during the Holocene through the accumulation and preservation of specific organic molecular biomarkers. To reconstruct Holocene fire events and vegetation changes occurring on the southeastern Tibetan Plateau and the surrounding areas, we used a multi-proxy approach, investigating multiple biomarkers preserved in core sediment samples retrieved from Paru Co, a small lake located in the Nyainqentanglha Mountains (29∘47′45.6 ′′ N, 92∘21′07.2 ′′ E; 4845 m a.s.l.). Biomarkers include n-alkanes as indicators of vegetation, polycyclic aromatic hydrocarbons (PAHs) as combustion proxies, fecal sterols and stanols (FeSts) as indicators of the presence of humans or grazing animals, and finally monosaccharide anhydrides (MAs) as specific markers of vegetation burning processes. Insolation changes and the associated influence on the Indian summer monsoon (ISM) affect the vegetation distribution and fire types recorded in Paru Co throughout the Holocene. The early Holocene (10.7–7.5 cal kyr BP) n-alkane ratios demonstrate oscillations between grass and conifer communities, resulting in respective smouldering fires represented by levoglucosan peaks, and high-temperature fires represented by high-molecular-weight PAHs. Forest cover increases with a strengthened ISM, where coincident high levoglucosan to mannosan (L ∕ M) ratios are consistent with conifer burning. The decrease in the ISM at 4.2 cal kyr BP corresponds with the expansion of regional civilizations, although the lack of human FeSts above the method detection limits excludes local anthropogenic influence on fire and vegetation changes. The late Holocene is characterized by a relatively shallow lake surrounded by grassland, where all ... |
format |
Article in Journal/Newspaper |
author |
Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben Villoslada Hidalgo, Maria del Carmen Bird, Broxton W. Barbante, Carlo |
author_facet |
Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben Villoslada Hidalgo, Maria del Carmen Bird, Broxton W. Barbante, Carlo |
author_sort |
Callegaro, Alice |
title |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
title_short |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
title_full |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
title_fullStr |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
title_full_unstemmed |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: a multi-biomarker reconstruction from Paru Co |
title_sort |
fire, vegetation, and holocene climate in a southeastern tibetan lake: a multi-biomarker reconstruction from paru co |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-14-1543-2018 https://cp.copernicus.org/articles/14/1543/2018/ |
geographic |
Indian |
geographic_facet |
Indian |
genre |
ice core |
genre_facet |
ice core |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-14-1543-2018 10670/1.hf2jm2 1814-9324 1814-9332 https://cp.copernicus.org/articles/14/1543/2018/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-14-1543-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
10 |
container_start_page |
1543 |
op_container_end_page |
1563 |
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1766029735508312064 |