Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland)
Holocene permafrost from ice wedge polygons in the vicinity of large seabird breeding colonies in the Thule District, NW Greenland, was drilled to explore the relation between permafrost aggradation and seabird presence. The latter is reliant on the presence of the North Water Polynya (NOW) in the n...
Published in: | Biogeosciences |
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2019
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Online Access: | https://pure.au.dk/portal/da/publications/stable-isotope-signatures-of-holocene-syngenetic-permafrost-trace-seabird-presence-in-the-thule-district-nw-greenland(558b2891-667c-4f19-baad-bc051b7525d0).html https://doi.org/10.5194/bg-16-4261-2019 http://www.scopus.com/inward/record.url?scp=85074996231&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/558b2891-667c-4f19-baad-bc051b7525d0 2023-12-31T09:58:43+01:00 Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) Wetterich, Sebastian Davidson, Thomas Alexander Bobrov, Anatoly Opel, Thomas Windirsch, Torben Johansen, Kasper Lambert Gonzalez-Bergonzoni, Ivan Mosbech, Anders Jeppesen, Erik 2019-11 https://pure.au.dk/portal/da/publications/stable-isotope-signatures-of-holocene-syngenetic-permafrost-trace-seabird-presence-in-the-thule-district-nw-greenland(558b2891-667c-4f19-baad-bc051b7525d0).html https://doi.org/10.5194/bg-16-4261-2019 http://www.scopus.com/inward/record.url?scp=85074996231&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/stable-isotope-signatures-of-holocene-syngenetic-permafrost-trace-seabird-presence-in-the-thule-district-nw-greenland(558b2891-667c-4f19-baad-bc051b7525d0).html info:eu-repo/semantics/openAccess Wetterich , S , Davidson , T A , Bobrov , A , Opel , T , Windirsch , T , Johansen , K L , Gonzalez-Bergonzoni , I , Mosbech , A & Jeppesen , E 2019 , ' Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) ' , Biogeosciences , vol. 16 , no. 21 , pp. 4261-4275 . https://doi.org/10.5194/bg-16-4261-2019 , https://doi.org/10.5194/bg-16-4261-2019 AUKS ALLE-ALLE COLONIES GROUND-ICE NORTHERNMOST BAFFIN-BAY POPULATION SEA-ICE TESTATE AMEBAS WEDGES article 2019 ftuniaarhuspubl https://doi.org/10.5194/bg-16-4261-2019 2023-12-07T00:03:46Z Holocene permafrost from ice wedge polygons in the vicinity of large seabird breeding colonies in the Thule District, NW Greenland, was drilled to explore the relation between permafrost aggradation and seabird presence. The latter is reliant on the presence of the North Water Polynya (NOW) in the northern Baffin Bay. The onset of peat accumulation associated with the arrival of little auks (Alle alle) in a breeding colony at Annikitisoq, north of Cape York, is radiocarbon-dated to 4400 cal BP. A thick-billed murre (Uria lomvia) colony on Appat (Saunders Island) in the mouth of the Wolstenholme Fjord started 5650 cal BP. Both species provide marine-derived nutrients (MDNs) that fertilize vegetation and promote peat growth. The geochemical signature of organic matter left by the birds is traceable in the frozen Holocene peat. The peat accumulation rates at both sites are highest after the onset, decrease over time, and were about 2-times faster at the little auk site than at the thick-billed murre site. High accumulation rates induce shorter periods of organic matter (OM) decomposition before it enters the perennially frozen state. This is seen in comparably high C=N ratios and less depleted 13C, pointing to a lower degree of OM decomposition at the little auk site, while the opposite pattern can be discerned at the thick-billed murre site. Peat accumulation rates correspond to 15N trends, where decreasing accumulation led to increasing depletion in 15N as seen in the little-auk-related data. In contrast, the more decomposed OM of the thick-billed murre site shows almost stable 15N. Late Holocene wedge ice fed by cold season precipitation was studied at the little auk site and provides the first stable-water isotopic record from Greenland with mean 18O of 8:00:8, mean D of 36:25:7, mean d excess of 7:70:7, and a 18O-D slope of 7.27, which is close to those of the modern Thule meteoric water line. The syngenetic ice wedge polygon development is mirrored in testacean records of the little auk site and delineates ... Article in Journal/Newspaper Alle alle Baffin Bay Baffin Bay Baffin Greenland Ice little auk permafrost Saunders Island Sea ice thick-billed murre Thule Uria lomvia wedge* Wolstenholme fjord uria Aarhus University: Research Biogeosciences 16 21 4261 4275 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
AUKS ALLE-ALLE COLONIES GROUND-ICE NORTHERNMOST BAFFIN-BAY POPULATION SEA-ICE TESTATE AMEBAS WEDGES |
spellingShingle |
AUKS ALLE-ALLE COLONIES GROUND-ICE NORTHERNMOST BAFFIN-BAY POPULATION SEA-ICE TESTATE AMEBAS WEDGES Wetterich, Sebastian Davidson, Thomas Alexander Bobrov, Anatoly Opel, Thomas Windirsch, Torben Johansen, Kasper Lambert Gonzalez-Bergonzoni, Ivan Mosbech, Anders Jeppesen, Erik Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
topic_facet |
AUKS ALLE-ALLE COLONIES GROUND-ICE NORTHERNMOST BAFFIN-BAY POPULATION SEA-ICE TESTATE AMEBAS WEDGES |
description |
Holocene permafrost from ice wedge polygons in the vicinity of large seabird breeding colonies in the Thule District, NW Greenland, was drilled to explore the relation between permafrost aggradation and seabird presence. The latter is reliant on the presence of the North Water Polynya (NOW) in the northern Baffin Bay. The onset of peat accumulation associated with the arrival of little auks (Alle alle) in a breeding colony at Annikitisoq, north of Cape York, is radiocarbon-dated to 4400 cal BP. A thick-billed murre (Uria lomvia) colony on Appat (Saunders Island) in the mouth of the Wolstenholme Fjord started 5650 cal BP. Both species provide marine-derived nutrients (MDNs) that fertilize vegetation and promote peat growth. The geochemical signature of organic matter left by the birds is traceable in the frozen Holocene peat. The peat accumulation rates at both sites are highest after the onset, decrease over time, and were about 2-times faster at the little auk site than at the thick-billed murre site. High accumulation rates induce shorter periods of organic matter (OM) decomposition before it enters the perennially frozen state. This is seen in comparably high C=N ratios and less depleted 13C, pointing to a lower degree of OM decomposition at the little auk site, while the opposite pattern can be discerned at the thick-billed murre site. Peat accumulation rates correspond to 15N trends, where decreasing accumulation led to increasing depletion in 15N as seen in the little-auk-related data. In contrast, the more decomposed OM of the thick-billed murre site shows almost stable 15N. Late Holocene wedge ice fed by cold season precipitation was studied at the little auk site and provides the first stable-water isotopic record from Greenland with mean 18O of 8:00:8, mean D of 36:25:7, mean d excess of 7:70:7, and a 18O-D slope of 7.27, which is close to those of the modern Thule meteoric water line. The syngenetic ice wedge polygon development is mirrored in testacean records of the little auk site and delineates ... |
format |
Article in Journal/Newspaper |
author |
Wetterich, Sebastian Davidson, Thomas Alexander Bobrov, Anatoly Opel, Thomas Windirsch, Torben Johansen, Kasper Lambert Gonzalez-Bergonzoni, Ivan Mosbech, Anders Jeppesen, Erik |
author_facet |
Wetterich, Sebastian Davidson, Thomas Alexander Bobrov, Anatoly Opel, Thomas Windirsch, Torben Johansen, Kasper Lambert Gonzalez-Bergonzoni, Ivan Mosbech, Anders Jeppesen, Erik |
author_sort |
Wetterich, Sebastian |
title |
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
title_short |
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
title_full |
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
title_fullStr |
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
title_full_unstemmed |
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) |
title_sort |
stable isotope signatures of holocene syngenetic permafrost trace seabird presence in the thule district (nw greenland) |
publishDate |
2019 |
url |
https://pure.au.dk/portal/da/publications/stable-isotope-signatures-of-holocene-syngenetic-permafrost-trace-seabird-presence-in-the-thule-district-nw-greenland(558b2891-667c-4f19-baad-bc051b7525d0).html https://doi.org/10.5194/bg-16-4261-2019 http://www.scopus.com/inward/record.url?scp=85074996231&partnerID=8YFLogxK |
genre |
Alle alle Baffin Bay Baffin Bay Baffin Greenland Ice little auk permafrost Saunders Island Sea ice thick-billed murre Thule Uria lomvia wedge* Wolstenholme fjord uria |
genre_facet |
Alle alle Baffin Bay Baffin Bay Baffin Greenland Ice little auk permafrost Saunders Island Sea ice thick-billed murre Thule Uria lomvia wedge* Wolstenholme fjord uria |
op_source |
Wetterich , S , Davidson , T A , Bobrov , A , Opel , T , Windirsch , T , Johansen , K L , Gonzalez-Bergonzoni , I , Mosbech , A & Jeppesen , E 2019 , ' Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland) ' , Biogeosciences , vol. 16 , no. 21 , pp. 4261-4275 . https://doi.org/10.5194/bg-16-4261-2019 , https://doi.org/10.5194/bg-16-4261-2019 |
op_relation |
https://pure.au.dk/portal/da/publications/stable-isotope-signatures-of-holocene-syngenetic-permafrost-trace-seabird-presence-in-the-thule-district-nw-greenland(558b2891-667c-4f19-baad-bc051b7525d0).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-16-4261-2019 |
container_title |
Biogeosciences |
container_volume |
16 |
container_issue |
21 |
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4261 |
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