Developing a new testate amoeba hydrological transfer function for permafrost peatlands of NW Siberia

Halaś, Agnieszka; Lamentowicz, Mariusz; Łuców, Dominika; Słowiński, Michał

doi:10.1016/j.quascirev.2023.108067

Cited by 3 publications

(5 citation statements)

References 108 publications

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“…TA are valuable bioindicators for studying past environmental changes, and their community distributions and abundance are strongly influenced by WTD and humidity [58,59]. By studying the changes of TA communities, we can understand the humidity and WTD status of paleoenvironments and further explore the patterns and mechanisms of environmental changes [34]. Our research results showed that the fossilized TA in the HT peatland revealed diverse and abundant assemblages, dominated by common species with a wildly ranging geographical distribution.…”

Section: Ta Community Evolution Process Of the Ht Profilementioning

confidence: 77%

“…The TA taxonomic scheme developed by Charman [20] and Charman, D and W.A [51] has been widely used in recent TA ecological studies [34,53,54]. We assigned Phryganella acropodia, P. acropodia penardi, and P. hemisphaerica to the Phryganella acropodia.…”

Section: Testate Amoebae Analysismentioning

confidence: 99%

“…At the base of the HT peatland core (650-450 cal yr BP), the dominant taxa are A. muscorum and T. arcula (Figure 2). A. muscorum and T. arcula are more abundant in boreal peatlands [34,58,59]. In modern ecological research, A. muscorum and T. arcula are considered as indicators of drought [29,35,60,61].…”

Section: Ta Community Evolution Process Of the Ht Profilementioning

confidence: 99%

“…A multitude of studies have demonstrated that PCA analysis utilizing species data can be employed to delineate habitat characteristics, contrast habitat differences, and investigate the primary habitat indicators [13,[31][32][33]. Transfer functions, commonly used for quantitatively reconstructing water levels, pH, and humidity [34][35][36], do indeed have inherent limitations. Notably, the precision of a transfer function heavily relies on the quality of the original data.…”

Section: Introductionmentioning

confidence: 99%

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Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium

Li,

Han,

Cong

et al. 2024

Atmosphere

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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.

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Section: Ta Community Evolution Process Of the Ht Profilementioning

confidence: 77%

Section: Testate Amoebae Analysismentioning

confidence: 99%

Section: Ta Community Evolution Process Of the Ht Profilementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium

Li,

Han,

Cong

et al. 2024

Atmosphere

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“…However, the study of the distribution of testate amoebae in these regions is extremely uneven. For example, the vast Siberian regions remain a blank spot on the map [16][17][18][19][20][21][22]. This dataset description is based on testate amoebae data published in Mazei et al, 2017 [23].…”

Section: Discussionmentioning

confidence: 99%

Biodiversity of Terrestrial Testate Amoebae in Western Siberia Lowland Peatlands

Saldaev,

Babeshko,

Chernyshov

et al. 2023

Data

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Testate amoebae are unicellular eukaryotic organisms covered with an external skeleton called a shell. They are an important component of many terrestrial ecosystems, especially peatlands, where they can be preserved in peat deposits and used as a proxy of surface wetness in paleoecological reconstructions. Here, we represent a database from a vast but poorly studied region of the Western Siberia Lowland containing information on TA occurrences in relation to substrate moisture and WTD. The dataset includes 88 species from 32 genera, with 2181 incidences and 21,562 counted individuals. All samples were collected in oligotrophic peatlands and prepared using the method of wet sieving with a subsequent sedimentation of aqueous suspensions. This database contributes to the understanding of the distribution of testate amoebae and can be further used in large-scale investigations.

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Multi-scale beta-diversity patterns in testate amoeba communities: species turnover and nestedness along a latitudinal gradient

Su,

Mazei,

Tsyganov

et al. 2024

Oecologia

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Developing a new testate amoeba hydrological transfer function for permafrost peatlands of NW Siberia

Cited by 3 publications

References 108 publications

Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium

Hydroclimate Changes Based on Testate Amoebae in the Greater Khingan Mountains’ Peatland (NE China) during the Last Millennium

Biodiversity of Terrestrial Testate Amoebae in Western Siberia Lowland Peatlands

Multi-scale beta-diversity patterns in testate amoeba communities: species turnover and nestedness along a latitudinal gradient

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