Impact of riverine suspended particulate matter on the branched glycerol dialkyl glycerol tetraether composition of lakes: The outflow of the Selenga River in Lake Baikal (Russia)

Jonge, Cindy De; Stadnitskaia, Alina; Fedotov, Andrey; Damsté, Jaap S. Sinninghe

doi:10.1016/j.orggeochem.2015.04.004

Cited by 30 publications

(16 citation statements)

References 60 publications

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“…However, up to now there are only a few investigations of 5-and 6-methyl isomers in lake systems (De Jonge et al, 2015;Weber et al, 2015;Ding et al, 2016;Dang et al, 2016a;Russell et al, 2018), and the environmental controls (especially temperature control) on these isomers in Chinese lacustrine environments are yet to be deciphered. In particular, it is unknown if the relationships between the 5-and 6-methyl brGDGT isomers with environmental factors are the same in lakes as observed for soils.…”

Section: Introductionmentioning

confidence: 99%

Different temperature dependence of the bacterial brGDGT isomers in 35 Chinese lake sediments compared to that in soils

Dang

Ding

Yang

et al. 2018

Organic Geochemistry

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During the last decade, the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in lacustrine sediments has been widely used to reconstruct past variations in lake temperature. A prerequisite for the application of brGDGTs to lacustrine paleoclimate reconstructions is to understand the sources of brGDGTs in lake systems and the processes that influence their distribution. In this study, we investigated the distribution of brGDGTs in core-top sediments from 35 lakes across China, with a broad mean annual air temperature (MAAT) range but a constrained pH range, to explore the effect of temperature. The results reveal a contrasting response of MBT'5ME and MBT'6ME to temperature in lake environments compared to that in soils. The sedimentary distributions of 5-and 6-methyl brGDGTs exhibit different relationships with temperature, with most of the latter being correlated to MAAT while the former responding to temperature by only hexamethylated compounds. In both global and Chinese soils, most 6-methyl brGDGTs have no relationship with MAAT but the distribution of 5-methyl brGDGTs is correlated with MAAT. The different behaviors suggest that both 5-and 6methyl brGDGTs-producing communities might be different in lakes and soils. In addition, in lakes from cold regions (MAAT < 5 °C), the brGDGT distribution correlates only with warm season temperatures (April to October) but exhibits no correlation with cold seasons, suggesting a seasonal bias in brGDGT production in these lakes. This bias towards the warm season is not found in lakes from warmer regions (MAAT > 5 °C). Based on these results we propose new temperature calibrations for paleotemperature reconstructions in Chinese alkaline lakes. Highlights 5-and 6-methyl brGDGTs measured in 35 Chinese lakes Seasonal bias towards warm months in cold region lakes Different responses to temperature between lakes and soils Highlights (for review)

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Section: Introductionmentioning

confidence: 99%

Different temperature dependence of the bacterial brGDGT isomers in 35 Chinese lake sediments compared to that in soils

Dang

Ding

Yang

et al. 2018

Organic Geochemistry

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“…Dang et al (2016), for example, found a moisture control on 6-methyl brGDGT distributions in semi-arid and arid soils. Results of the analyses of sources and distributions of 6-methyl brGDGTs in coastal marine and lake sediments suggest that brGDGTs are universally produced in the water column (De Jonge et al, 2015a, 2015b, 2016Sinninghe Damsté, 2016).…”

Section: Introductionmentioning

confidence: 99%

Identification of novel 7-methyl and cyclopentanyl branched glycerol dialkyl glycerol tetraethers in lake sediments

Sheng

Schwab

Ueberschaar

et al. 2016

Organic Geochemistry

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Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are bacterial membrane lipids that are widely used as valuable paleoenvironmental proxies. The recently discovered 6-methyl brGDGTs improved the accuracy of the proxies for temperature “methylation branched tetraethers (MBT)” and soil pH “cyclization branched tetraethers (CBT)”. However, the calibration uncertainties are still substantial for brGDGT-derived proxies (e.g., 5 °C for MBT′5ME). Here we report a series of novel 7-methyl brGDGT isomers that co-eluted with the known 5- and 6-methyl brGDGTs in commonly applied normal phase high performance liquid chromatography (HPLC). Using an optimized HPLC gradient the novel 7-methyl brGDGTs could be structurally characterized and quantified. Their mean relative abundance was in the range of 6% of the total brGDGTs in Chinese and Cameroon lake sediments. The 7-methyl brGDGT IIa7 correlates with sediment pH (R2 = 0.44, root-mean-square error = 0.26 pH unit), a result that motivates the re-analysis of brGDGTs in soils and sediments to further reassess brGDGT-based proxies and to determine the source of 7-methyl brGDGTs. In addition to the 7-methyl brGDGTs, we identified two novel pentamethylated brGDGTs based on the mass spectra of its ether-cleaved hydrocarbon products

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“…Since bGDGTs are membrane lipids produced by bacteria, sources of bGDGTs in lake sediments can be diverse, comprising, for example, soils (Weijers et al, 2007b), peats (Weijers et al, 2006;Naafs et al, 2017), and aquatic environments (Zhu et al, 2011;Buckles et al, 2014;Sinninghe Damsté, 2016). Therefore, the provenance of bGDGTs should be assessed before using bGDGTs in paleotemperature reconstruction (Yang et al, 2013;Zell et al, 2013;De Jonge et al, 2015;Warden et al, 2016). It has been reported that the ternary diagram of tetra-, penta-, and hexa-methylated bGDGTs can separate bGDGTs from soils by input from land (e.g., by riverine transport) or by aquatic (in situ) production (Sinninghe Damsté, 2016).…”

Section: Provenance Of Glycerol Dialkyl Glycerol Tetraethersmentioning

confidence: 99%

Temperature Variation on the Central Tibetan Plateau Revealed by Glycerol Dialkyl Glycerol Tetraethers From the Sediment Record of Lake Linggo Co Since the Last Deglaciation

Wang

et al. 2020

Front. Earth Sci.

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Impact of riverine suspended particulate matter on the branched glycerol dialkyl glycerol tetraether composition of lakes: The outflow of the Selenga River in Lake Baikal (Russia)

Abstract: Impact of riverine suspended particulate matter on the branched glycerol dialkyl glycerol tetraether composition of lakes: The outflow of the Selenga River in Lake Baikal (Russia)

Cited by 30 publications

References 60 publications

Different temperature dependence of the bacterial brGDGT isomers in 35 Chinese lake sediments compared to that in soils

Different temperature dependence of the bacterial brGDGT isomers in 35 Chinese lake sediments compared to that in soils

Identification of novel 7-methyl and cyclopentanyl branched glycerol dialkyl glycerol tetraethers in lake sediments

Temperature Variation on the Central Tibetan Plateau Revealed by Glycerol Dialkyl Glycerol Tetraethers From the Sediment Record of Lake Linggo Co Since the Last Deglaciation

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