Cascading response of flora and terrestrial mollusks to last deglacial warming

Dong, Yajie; Wu, Nan; Jiang, Wenying; Li, Fengjiang; Lü, Houyuan

doi:10.1016/j.gecco.2020.e01360

Cited by 5 publications

(3 citation statements)

References 35 publications

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“…Detrended correspondence components (DCA) analysis computed on correlation matrices was performed after arc sine transformation (Rousseau 1987(Rousseau , 1990(Rousseau , 1991(Rousseau , 2001Zar 1990) of the malacological data. Detrended correspondence analysis was used for molluscbased pale ecological reconstructions (Rousseau 1987(Rousseau , 1990Limondin & Rousseau 1991;Dong et al 2020). The dominance values of certain Mollusc species and those of the given palaeoecological groups are of crucial importance regarding the reconstruction of the prevailing environmental factors.…”

Section: Methodsmentioning

confidence: 99%

Results of the malacological assemblage from the moat of sultan Suleiman’s türbe at Szigetvár (SW Hungary)

Sümegi

2023

Archeometriai Műhely

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A total of 25 samples were taken from the section of the moat bordering the former türbe of Sultan Suleiman in Szigetvár. Altogether 5 713 identifiable mollusc remains that cover 20 terrestrial snail species were found. Based on the dominance changes of species and palaeoecological groups and the detrended correspondence analysis (DCA), three malacological zones (Türbe Malacological Zone: TMZ) could be separated in the profile of the moat. In the first malacological zone (between 250 and 140 cm) the high number of Eurosiberian species (hygrophilous and cold resistant species, Succinea: amber snail) were found. Their presence and significant amount are in relation with the colder meso- and microclimate of the 17th century. As a result, it can be assumed that the climate of the Little Ice Age (LIA) in the Carpathian Basin changed according to the micro-topography and vegetation cover, and was not uniform. In the second malacological zone (between 140 and 50 cm) the number of cold-tolerant and hygrophilous, Eurosiberian fauna elements decreased, and gradually disappeared from the profile. In parallel, mesophilous and thermophilous, open-vegetation favouring Central and South-eastern European taxa became dominant. So, the moat filled up and a dry habitat with more open vegetation, which was no longer favourable for moistureloving (and shade-loving) species developed. The third malacological zone (from 50 cm towards the surface) indicated a major transformation in the fauna composition. The ratio of mesophilous species decreased drastically. Central and South-eastern European thermophilous species, favouring open vegetation dominated in this level of the profile. Very likely, the upper 40–50 cm part of the profile was filled up at the end of the 17th century, or at the beginning of the 18th century. The changes in the malacofauna composition indicate mesoclimatic and microclimatic alterations and strong human impact. Based on our data, we need to treat climate change and its effects on agriculture in the Carpathian Basin in a more differentiated way for the 17th century, and we cannot and should not extend the negative effects of the North Atlantic to the Carpathian Basin. Since, on the basis of former malacological studies, the mosaic-like nature of the Carpathian Basin was able to compensate for the unfavourable climatic changes of the Little Ice Age.

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Section: Methodsmentioning

confidence: 99%

Results of the malacological assemblage from the moat of sultan Suleiman’s türbe at Szigetvár (SW Hungary)

Sümegi

2023

Archeometriai Műhely

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“…During warmer phases, there is a significant reduction in vegetation and malacofauna diversity (Fig. 9) due to cascade-type changes (Dong et al, 2020). The number of mollusc taxa of the characteristic temperate forest steppe during these periods is a third of those dwelling in the end-Pleistocene borealsteppe/forest-steppe ecotones (Sümegi et al, 2012(Sümegi et al, , 2018.…”

Section: Comparison With Other Regional Recordsmentioning

confidence: 99%

New chronology and extended palaeoenvironmental data to the 1975 loess profile of Madaras brickyard, South Hungary

Sümegi

Gulyás

Molnár

et al. 2021

J Quaternary Science

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The 10 m thick Madaras loess-palaeosol profile is one of the Hungarian outcrops that yielded Upper Palaeolithic artefacts in 1966. To clarify the nature of the deposits and establish a reliable litho-and chronostratigraphy, a profile was opened and sampled at 25 cm intervals on the northern side of the brickyard in 1975. Analyses focused on grain size, carbonate content and the mollusc fauna. The chronology was based on the mollusc composition and a single date from the archaeological layer at the depth of ca 7 m below the surface. The 1975 profile was destroyed by mining but the reposited samples allowed an extended analysis of this important Marine Isotope Stage 2 record to which archaeological features were directly assigned. A new absolute chronology was built based on 11 14 C dates. Environmental magnetic, geochemical and palaeoecological investigations allowed a refined view of site evolution with reliable chronology for the Last Glacial Maximum. Our results corroborated those of previous investigations done on other coeval loess-palaeosol sequences of the Southern Carpathian Basin. This also allowed for a temporal correlation to another local record with the published high-resolution chronology of the same brickyard and enabled modelling of local-scale heterogeneity of the environment in the long run.

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“…A sampling of each loess section was conducted at the equal intervals which equates to an average temporal resolution of ∼200-600 years for each sample (Supplementary Figure S1). The mollusk data for the Yaoxian, Jingchuan, Linxia and Jixian loess profiles are from Dong et al (2020aDong et al ( , 2020bDong et al ( , 2021b. Each sample comprised ∼15 kg of soil material, and all samples were washed and sieved in the field using a 0.5-mm mesh sieve to remove fine soil.…”

Section: Mollusk Samplesmentioning

confidence: 99%

Rapid Northwestward Extension of the East Asian Summer Monsoon Since the Last Deglaciation: Evidence From the Mollusk Record

Dong

et al. 2021

Front. Earth Sci.

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The magnitude and rate of the expansion of the East Asian summer monsoon (EASM) rain belt under future climatic warming are unclear. Appropriate ecological proxy data may provide an improved understanding of the spatial extension of the EASM during past warming intervals. We reconstructed the spatiotemporal pattern of the extension of the EASM since the Last Glacial Maximum (LGM), using six well-dated mollusk fossil sequences from Chinese loess sections located on the modern northern edge of the EASM. The abundance of typical dominant mollusk species indicative of EASM intensity shows a delayed response, from ∼17 ka in the southeastern sections to ∼9 ka in the northwestern sections, during the last deglacial warming. Isoline plots based on a mollusk data synthesis show that the mollusk EASM indicators have a northeast–southwest zonal distribution for both the present-day, the cold LGM, and the warm mid-Holocene, which is consistent with the spatial pattern of modern precipitation. The resulting estimated expansion rate of EASM intensity accelerated during ∼12–9 ka (∼50 km/ka), which corresponds to the early Holocene interval of rapid climatic warming, a northwestward shift of ∼150 km compared to today. This implies that the northern fringe of the EASM in northern China will become wetter in the coming century, under moderate warming scenarios.

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Cascading response of flora and terrestrial mollusks to last deglacial warming

Cited by 5 publications

References 35 publications

Results of the malacological assemblage from the moat of sultan Suleiman’s türbe at Szigetvár (SW Hungary)

Results of the malacological assemblage from the moat of sultan Suleiman’s türbe at Szigetvár (SW Hungary)

New chronology and extended palaeoenvironmental data to the 1975 loess profile of Madaras brickyard, South Hungary

Rapid Northwestward Extension of the East Asian Summer Monsoon Since the Last Deglaciation: Evidence From the Mollusk Record

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