Late Quaternary water depth changes in Hala Lake, northeastern Tibetan Plateau, derived from ostracod assemblages and sediment properties in multiple sediment records

Yan, Dada; Wünnemann, B.

doi:10.1016/j.quascirev.2014.04.030

Cited by 76 publications

(33 citation statements)

References 74 publications

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“…The profundal sediments are characterised by clayey structure, low organic matter content, and anaerobic conditions that eliminate biological life. Waves and variations of the lake's level do not affect the profundal sediments as strongly as the littoral deposits [23]. The significant increase in the very fine fraction (by 7.3%) was noted along with the distance from the inflow.…”

Section: Discussionmentioning

confidence: 82%

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Kuriata-Potasznik

Szymczyk

Skwierawski

et al. 2016

Water

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River-lake systems most often behave as hydrographic units, which undergo complex interactions, especially in the contact zone. One such interaction pertains to the role of a river in the dispersal of trace elements carried into and out of a lake. In this study, we aimed to assess the impact of rivers on the accumulation of heavy metals in bottom sediments of natural lakes comprised in postglacial river-lake systems. The results showed that a river flowing through a lake is a key factor responsible for the input of the majority of available fraction of heavy metals (Zn, Mn, Cd and Ni) into the water body and for their accumulation along the flow of river water in the lake. The origin of other accumulated elements were the linear and point sources in catchments. In turn, the Pb content was associated with the location of roads in the direct catchment, while the sediment structure (especially size of fraction and density) could have affected the accumulation of Cr and Zn, which indicated correlations between these metals and fine fraction. Our results suggest that lakes act as filters and contribute to the self-purification of water that flows through them. As a result, the content of most metals in lake sediments showed a decrease by approx. 75% between the upstream (inflow) and downstream (outflow) sections. The increased content of two metals only, such as chromium and cadmium (higher by 2.0 and 2.5 times, respectively, after passing through the lake), was due to the correlation of the metals with fine sand. Both the content and distribution pattern of heavy metals in lake sediments are indicative of the natural response of aquatic ecosystems to environmental stressors, such as pollutant import with river water or climate change. The complex elements creating the water ecosystem of each lake can counteract stress by temporarily removing pollutants such as toxic metals form circulation and depositing them mostly around the delta.

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Section: Discussionmentioning

confidence: 82%

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Kuriata-Potasznik

Szymczyk

Skwierawski

et al. 2016

Water

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“…Nam Co and Qinghai Lake as well as surrounding areas (e.g. Yan and Wünnemann, 2014), showing a similar moisture evolution, seem to be influenced by this moisture source (Fig. 4).…”

Section: F Günther Et Al / Quaternary Science Reviews 112 (2015) 66e77mentioning

confidence: 81%

“…Numerous lake studies at the Tibetan Plateau have focused on changes of the IOSM during the Holocene (e.g., Morrill et al, 2006;Mügler et al, 2010;Kasper et al, 2012;Doberschütz et al, 2013), but only a few have investigated the transition from the Pleistocene to the Holocene (partially in Morrill et al, 2003;Liu et al, 2007;Wünnemann et al, 2010;Yan and Wünnemann, 2014). The current investigation focuses on the transition from the Last Glacial Maximum (LGM) to the Early Holocene and is an extension of the already-published Nam Co data covering the Holocene .…”

Section: Introductionmentioning

confidence: 99%

Quaternary ecological responses and impacts of the Indian Ocean Summer Monsoon at Nam Co, Southern Tibetan Plateau

Günther

Witt

Schouten

et al. 2015

Quaternary Science Reviews

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“…It is generally assumed that sediments from a selected core site are representative enough to reconstruct past climate-induced environmental conditions. However, some publications have indicated that a single coring site does not necessarily provide an accurate representation of changes in the entire lake (e.g., Opitz et al 2012;Wünnemann et al 2012;Yan and Wünnemann 2014). Therefore, the debate about whether or not a single core from a lake is sufficient for a paleoenvironmental study has been increasingly criticized in recent years, and studies of the spatial characteristics of lake sediments are still rare.…”

Section: Introductionmentioning

confidence: 99%

Spatial uniformity in the mineralogical and geochemical compositions of surface sediments in Lake Qinghai and their controlling factors

et al. 2015

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To advance the understanding of the spatial variability of sediment composition and its controlling factors in a large hydrologically closed lake, the spatial distributions in the mineralogy and geochemistry of 18 surface sediment samples along three transects across the deepest part of Lake Qinghai on the northeastern Tibetan Plateau were investigated. The data show (1) that the surface lake sediments are almost the same in the XRD patterns, (2) that the sediments do not have considerable changes in geochemical compositions along three transects and (3) that the standard deviations of the lake sediments are low in grain size, elemental abundances, d 13 C and d 18 O values of carbonates, and total organic carbon and nitrogen, with the exception of one sample (QH-11) from the westernmost part of the northern sub-basin. These characteristics indicate that the spatial variability of the surface sediment across Lake Qinghai is very low in geochemical and silicate mineralogical compositions, with limited differences in the chemical composition of carbonates associated with river water dilution. Sample QH-11 has anomalously high levels of MgO, a high carbonate content, and positive d 13 C and d 18 O values in bulk and fine-grained carbonates, probably because of the effect of calcareous tufa. Spatial uniformity in the mineralogical and geochemical compositions of surface sediments in Lake Qinghai can be attributed to the flat topography of the lakebed and stable sediment provenances, the latter dominated by dust deposition and authigenic carbonates. The spatial uniformity and dominance of dust and authigenic aragonite of surface sediments across Lake Qinghai provide a potential record of the hydroclimate in the past, which is associated with changes in the Westerlies and the summer monsoons.

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Late Quaternary water depth changes in Hala Lake, northeastern Tibetan Plateau, derived from ostracod assemblages and sediment properties in multiple sediment records

Cited by 76 publications

References 74 publications

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Quaternary ecological responses and impacts of the Indian Ocean Summer Monsoon at Nam Co, Southern Tibetan Plateau

Spatial uniformity in the mineralogical and geochemical compositions of surface sediments in Lake Qinghai and their controlling factors

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