A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids
The late glacial – early Holocene transition is a key period in the earth’s history. However, although this transition is well studied in Europe, it is not well constrained in the Middle East and palaeohydrological records with robust chronologies remain scarce from this region. Here we present an i...
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crcansciencepubl:10.1139/cjes-2018-0256 2024-05-19T07:44:21+00:00 A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids Aubert, Cyril Djamali, Morteza Jones, Matthew Lahijani, Hamid Marriner, Nick Naderi-Beni, Abdolmajid Sharifi, Arash Ponel, Philippe Gandouin, Emmanuel 2019 http://dx.doi.org/10.1139/cjes-2018-0256 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2018-0256 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2018-0256 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 56, issue 8, page 848-856 ISSN 0008-4077 1480-3313 journal-article 2019 crcansciencepubl https://doi.org/10.1139/cjes-2018-0256 2024-05-02T06:51:27Z The late glacial – early Holocene transition is a key period in the earth’s history. However, although this transition is well studied in Europe, it is not well constrained in the Middle East and palaeohydrological records with robust chronologies remain scarce from this region. Here we present an interesting hydrobiological record showing a major environmental change occurring in the Dasht-e Arjan Wetland (southwestern Iran, near to Persepolis) during the late glacial – early Holocene transition (ca. 11 650 years cal BP). We use subfossil chironomids (Insecta: Diptera) as a proxy for hydrological changes and to reconstruct lake-level fluctuations. The Arjan wetland was a deep lake during the Younger Dryas marked by a dominance of Chironomus plumosus/anthracinus-type, taxa adapted to anoxic conditions of deep waters. At the beginning of the Holocene, a drastic decrease (more than 80% to less than 10%) of Chironomus plumosus/anthracinus-type, combined with diversification of littoral taxa such as Polypedilum nubeculosum-type, Dicrotendipes nervosus-type, and Glyptotendipes pallens-type, suggests a lake-level decrease and a more vegetalized aquatic environment. We compare and contrast the chironomid record of Arjan with a similar record from northwestern Iran. The palaeoclimatic significance of the record, at a local and regional scale, is subsequently discussed. The increase in Northern Hemisphere temperatures, inferred by geochemical data from NGRIP, at the beginning of the Holocene best explains the change from the Younger Dryas highstand to early Holocene lowstand conditions in the Dasht-e Arjan wetland. However, a contribution of the meltwater inflow from small local glaciers in the catchment basin is not excluded. Article in Journal/Newspaper NGRIP Canadian Science Publishing Canadian Journal of Earth Sciences 56 8 848 856 |
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English |
description |
The late glacial – early Holocene transition is a key period in the earth’s history. However, although this transition is well studied in Europe, it is not well constrained in the Middle East and palaeohydrological records with robust chronologies remain scarce from this region. Here we present an interesting hydrobiological record showing a major environmental change occurring in the Dasht-e Arjan Wetland (southwestern Iran, near to Persepolis) during the late glacial – early Holocene transition (ca. 11 650 years cal BP). We use subfossil chironomids (Insecta: Diptera) as a proxy for hydrological changes and to reconstruct lake-level fluctuations. The Arjan wetland was a deep lake during the Younger Dryas marked by a dominance of Chironomus plumosus/anthracinus-type, taxa adapted to anoxic conditions of deep waters. At the beginning of the Holocene, a drastic decrease (more than 80% to less than 10%) of Chironomus plumosus/anthracinus-type, combined with diversification of littoral taxa such as Polypedilum nubeculosum-type, Dicrotendipes nervosus-type, and Glyptotendipes pallens-type, suggests a lake-level decrease and a more vegetalized aquatic environment. We compare and contrast the chironomid record of Arjan with a similar record from northwestern Iran. The palaeoclimatic significance of the record, at a local and regional scale, is subsequently discussed. The increase in Northern Hemisphere temperatures, inferred by geochemical data from NGRIP, at the beginning of the Holocene best explains the change from the Younger Dryas highstand to early Holocene lowstand conditions in the Dasht-e Arjan wetland. However, a contribution of the meltwater inflow from small local glaciers in the catchment basin is not excluded. |
format |
Article in Journal/Newspaper |
author |
Aubert, Cyril Djamali, Morteza Jones, Matthew Lahijani, Hamid Marriner, Nick Naderi-Beni, Abdolmajid Sharifi, Arash Ponel, Philippe Gandouin, Emmanuel |
spellingShingle |
Aubert, Cyril Djamali, Morteza Jones, Matthew Lahijani, Hamid Marriner, Nick Naderi-Beni, Abdolmajid Sharifi, Arash Ponel, Philippe Gandouin, Emmanuel A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
author_facet |
Aubert, Cyril Djamali, Morteza Jones, Matthew Lahijani, Hamid Marriner, Nick Naderi-Beni, Abdolmajid Sharifi, Arash Ponel, Philippe Gandouin, Emmanuel |
author_sort |
Aubert, Cyril |
title |
A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
title_short |
A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
title_full |
A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
title_fullStr |
A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
title_full_unstemmed |
A major hydrobiological change in Dasht-e Arjan Wetland (southwestern Iran) during the late glacial – early Holocene transition revealed by subfossil chironomids |
title_sort |
major hydrobiological change in dasht-e arjan wetland (southwestern iran) during the late glacial – early holocene transition revealed by subfossil chironomids |
publisher |
Canadian Science Publishing |
publishDate |
2019 |
url |
http://dx.doi.org/10.1139/cjes-2018-0256 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2018-0256 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2018-0256 |
genre |
NGRIP |
genre_facet |
NGRIP |
op_source |
Canadian Journal of Earth Sciences volume 56, issue 8, page 848-856 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2018-0256 |
container_title |
Canadian Journal of Earth Sciences |
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56 |
container_issue |
8 |
container_start_page |
848 |
op_container_end_page |
856 |
_version_ |
1799484120744591360 |