Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia)
Organic matter deposited in ancient, ice-rich permafrost sediments is vulnerable to climate change and may contribute to the future release of greenhouse gases; it is thus important to get a better characterization of the plant organic matter within such sediments. From a Late Quaternary permafrost...
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ftdoajarticles:oai:doaj.org/article:d3d1276d8bec46f49d33798b2efb98cd 2023-05-15T16:37:38+02:00 Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) H. H. Zimmermann E. Raschke L. S. Epp K. R. Stoof-Leichsenring G. Schwamborn L. Schirrmeister P. P. Overduin U. Herzschuh 2017-02-01T00:00:00Z https://doi.org/10.5194/bg-14-575-2017 https://doaj.org/article/d3d1276d8bec46f49d33798b2efb98cd EN eng Copernicus Publications http://www.biogeosciences.net/14/575/2017/bg-14-575-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-14-575-2017 https://doaj.org/article/d3d1276d8bec46f49d33798b2efb98cd Biogeosciences, Vol 14, Iss 3, Pp 575-596 (2017) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/bg-14-575-2017 2022-12-31T08:53:27Z Organic matter deposited in ancient, ice-rich permafrost sediments is vulnerable to climate change and may contribute to the future release of greenhouse gases; it is thus important to get a better characterization of the plant organic matter within such sediments. From a Late Quaternary permafrost sediment core from the Buor Khaya Peninsula, we analysed plant-derived sedimentary ancient DNA (sedaDNA) to identify the taxonomic composition of plant organic matter, and undertook palynological analysis to assess the environmental conditions during deposition. Using sedaDNA, we identified 154 taxa and from pollen and non-pollen palynomorphs we identified 83 taxa. In the deposits dated between 54 and 51 kyr BP, sedaDNA records a diverse low-centred polygon plant community including recurring aquatic pond vegetation while from the pollen record we infer terrestrial open-land vegetation with relatively dry environmental conditions at a regional scale. A fluctuating dominance of either terrestrial or swamp and aquatic taxa in both proxies allowed the local hydrological development of the polygon to be traced. In deposits dated between 11.4 and 9.7 kyr BP (13.4–11.1 cal kyr BP), sedaDNA shows a taxonomic turnover to moist shrub tundra and a lower taxonomic richness compared to the older samples. Pollen also records a shrub tundra community, mostly seen as changes in relative proportions of the most dominant taxa, while a decrease in taxonomic richness was less pronounced compared to sedaDNA. Our results show the advantages of using sedaDNA in combination with palynological analyses when macrofossils are rarely preserved. The high resolution of the sedaDNA record provides a detailed picture of the taxonomic composition of plant-derived organic matter throughout the core, and palynological analyses prove valuable by allowing for inferences of regional environmental conditions. Article in Journal/Newspaper Ice permafrost Tundra Siberia Directory of Open Access Journals: DOAJ Articles Khaya ENVELOPE(135.167,135.167,60.567,60.567) Buor-Khaya ENVELOPE(127.803,127.803,72.287,72.287) Biogeosciences 14 3 575 596 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 H. H. Zimmermann E. Raschke L. S. Epp K. R. Stoof-Leichsenring G. Schwamborn L. Schirrmeister P. P. Overduin U. Herzschuh Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Organic matter deposited in ancient, ice-rich permafrost sediments is vulnerable to climate change and may contribute to the future release of greenhouse gases; it is thus important to get a better characterization of the plant organic matter within such sediments. From a Late Quaternary permafrost sediment core from the Buor Khaya Peninsula, we analysed plant-derived sedimentary ancient DNA (sedaDNA) to identify the taxonomic composition of plant organic matter, and undertook palynological analysis to assess the environmental conditions during deposition. Using sedaDNA, we identified 154 taxa and from pollen and non-pollen palynomorphs we identified 83 taxa. In the deposits dated between 54 and 51 kyr BP, sedaDNA records a diverse low-centred polygon plant community including recurring aquatic pond vegetation while from the pollen record we infer terrestrial open-land vegetation with relatively dry environmental conditions at a regional scale. A fluctuating dominance of either terrestrial or swamp and aquatic taxa in both proxies allowed the local hydrological development of the polygon to be traced. In deposits dated between 11.4 and 9.7 kyr BP (13.4–11.1 cal kyr BP), sedaDNA shows a taxonomic turnover to moist shrub tundra and a lower taxonomic richness compared to the older samples. Pollen also records a shrub tundra community, mostly seen as changes in relative proportions of the most dominant taxa, while a decrease in taxonomic richness was less pronounced compared to sedaDNA. Our results show the advantages of using sedaDNA in combination with palynological analyses when macrofossils are rarely preserved. The high resolution of the sedaDNA record provides a detailed picture of the taxonomic composition of plant-derived organic matter throughout the core, and palynological analyses prove valuable by allowing for inferences of regional environmental conditions. |
format |
Article in Journal/Newspaper |
author |
H. H. Zimmermann E. Raschke L. S. Epp K. R. Stoof-Leichsenring G. Schwamborn L. Schirrmeister P. P. Overduin U. Herzschuh |
author_facet |
H. H. Zimmermann E. Raschke L. S. Epp K. R. Stoof-Leichsenring G. Schwamborn L. Schirrmeister P. P. Overduin U. Herzschuh |
author_sort |
H. H. Zimmermann |
title |
Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
title_short |
Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
title_full |
Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
title_fullStr |
Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
title_full_unstemmed |
Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia) |
title_sort |
sedimentary ancient dna and pollen reveal the composition of plant organic matter in late quaternary permafrost sediments of the buor khaya peninsula (north-eastern siberia) |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-575-2017 https://doaj.org/article/d3d1276d8bec46f49d33798b2efb98cd |
long_lat |
ENVELOPE(135.167,135.167,60.567,60.567) ENVELOPE(127.803,127.803,72.287,72.287) |
geographic |
Khaya Buor-Khaya |
geographic_facet |
Khaya Buor-Khaya |
genre |
Ice permafrost Tundra Siberia |
genre_facet |
Ice permafrost Tundra Siberia |
op_source |
Biogeosciences, Vol 14, Iss 3, Pp 575-596 (2017) |
op_relation |
http://www.biogeosciences.net/14/575/2017/bg-14-575-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-14-575-2017 https://doaj.org/article/d3d1276d8bec46f49d33798b2efb98cd |
op_doi |
https://doi.org/10.5194/bg-14-575-2017 |
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Biogeosciences |
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14 |
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575 |
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596 |
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