Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium
The driving force of climate change in the monsoon margin is complex, making it a key area for regional and global climate change research. Palaeohydrological studies in the monsoon margin have increased the resolution of research in the long term, transitioning from qualitative to quantitative stud...
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ftdoajarticles:oai:doaj.org/article:2b555302f8834cb5989dd0617040db91 2024-09-15T18:24:05+00:00 Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium Xiao Li Dongxue Han Jinxin Cong Chuanyu Gao Guoping Wang 2024-03-01T00:00:00Z https://doi.org/10.3390/atmos15030314 https://doaj.org/article/2b555302f8834cb5989dd0617040db91 EN eng MDPI AG https://www.mdpi.com/2073-4433/15/3/314 https://doaj.org/toc/2073-4433 doi:10.3390/atmos15030314 2073-4433 https://doaj.org/article/2b555302f8834cb5989dd0617040db91 Atmosphere, Vol 15, Iss 3, p 314 (2024) peatland testate amoebae East Asian Summer Monsoon reconstruction palaeohydrology Meteorology. Climatology QC851-999 article 2024 ftdoajarticles https://doi.org/10.3390/atmos15030314 2024-08-05T17:49:45Z The driving force of climate change in the monsoon margin is complex, making it a key area for regional and global climate change research. Palaeohydrological studies in the monsoon margin have increased the resolution of research in the long term, transitioning from qualitative to quantitative studies to comprehend climate change processes, patterns, and mechanisms. Testate amoebae (TA) in peat sediments are used as a proxy indicator organism for quantitative reconstruction of palaeohydrology. Thus, their community changes are directly related to precipitation, and widely used to reconstruct the patterns of summer precipitation globally. We investigated TA species and reconstructed palaeohydrological changes in the Greater Khingan Mountains’ Hongtu (HT) peatland, located in the East Asian Summer Monsoon (EASM) margin. The result showed that the most abundant TA species were Assulina muscorum (12.4 ± 5.0%) and Nebela tincta (8.9 ± 4.9%) in the HT peat core. The increase in dry indicator species (e.g., A. muscorum and Alabasta militaris ) indicated a drying pattern in the HT peatland since 150 cal yr BP. Principal component analysis (PCA) explained 47.6% of the variation in the selected TA assemblages. During 400 to 250 cal yr BP, PCA axis 1 scores ranged from 0.2 to −1.3 (reflecting a drier climate), associating with the Little Ice Age. The paleohydrology of the northern part of the Greater Khingan Mountains was mainly controlled by the EASM, which was associated with changes in North Atlantic Sea surface temperature and solar radiative forcing. The apparent drying pattern may be the result of the gradual intensification of anthropogenic activities and the increase in EASM intensity. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Atmosphere 15 3 314 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
peatland testate amoebae East Asian Summer Monsoon reconstruction palaeohydrology Meteorology. Climatology QC851-999 |
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peatland testate amoebae East Asian Summer Monsoon reconstruction palaeohydrology Meteorology. Climatology QC851-999 Xiao Li Dongxue Han Jinxin Cong Chuanyu Gao Guoping Wang Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
topic_facet |
peatland testate amoebae East Asian Summer Monsoon reconstruction palaeohydrology Meteorology. Climatology QC851-999 |
description |
The driving force of climate change in the monsoon margin is complex, making it a key area for regional and global climate change research. Palaeohydrological studies in the monsoon margin have increased the resolution of research in the long term, transitioning from qualitative to quantitative studies to comprehend climate change processes, patterns, and mechanisms. Testate amoebae (TA) in peat sediments are used as a proxy indicator organism for quantitative reconstruction of palaeohydrology. Thus, their community changes are directly related to precipitation, and widely used to reconstruct the patterns of summer precipitation globally. We investigated TA species and reconstructed palaeohydrological changes in the Greater Khingan Mountains’ Hongtu (HT) peatland, located in the East Asian Summer Monsoon (EASM) margin. The result showed that the most abundant TA species were Assulina muscorum (12.4 ± 5.0%) and Nebela tincta (8.9 ± 4.9%) in the HT peat core. The increase in dry indicator species (e.g., A. muscorum and Alabasta militaris ) indicated a drying pattern in the HT peatland since 150 cal yr BP. Principal component analysis (PCA) explained 47.6% of the variation in the selected TA assemblages. During 400 to 250 cal yr BP, PCA axis 1 scores ranged from 0.2 to −1.3 (reflecting a drier climate), associating with the Little Ice Age. The paleohydrology of the northern part of the Greater Khingan Mountains was mainly controlled by the EASM, which was associated with changes in North Atlantic Sea surface temperature and solar radiative forcing. The apparent drying pattern may be the result of the gradual intensification of anthropogenic activities and the increase in EASM intensity. |
format |
Article in Journal/Newspaper |
author |
Xiao Li Dongxue Han Jinxin Cong Chuanyu Gao Guoping Wang |
author_facet |
Xiao Li Dongxue Han Jinxin Cong Chuanyu Gao Guoping Wang |
author_sort |
Xiao Li |
title |
Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
title_short |
Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
title_full |
Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
title_fullStr |
Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
title_full_unstemmed |
Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium |
title_sort |
hydroclimate changes based on testate amoebae in the greater khingan mountains’ peatland (ne china) during the last millennium |
publisher |
MDPI AG |
publishDate |
2024 |
url |
https://doi.org/10.3390/atmos15030314 https://doaj.org/article/2b555302f8834cb5989dd0617040db91 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmosphere, Vol 15, Iss 3, p 314 (2024) |
op_relation |
https://www.mdpi.com/2073-4433/15/3/314 https://doaj.org/toc/2073-4433 doi:10.3390/atmos15030314 2073-4433 https://doaj.org/article/2b555302f8834cb5989dd0617040db91 |
op_doi |
https://doi.org/10.3390/atmos15030314 |
container_title |
Atmosphere |
container_volume |
15 |
container_issue |
3 |
container_start_page |
314 |
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1810464384059703296 |