Diatoms as indicators of water quality in Western Mongolian lakes: a 54-site calibration set

Shinneman, Avery L.C.; Edlund, Mark B.; Almendinger, James E.; Nergui, Soninkhishig

doi:10.1007/s10933-008-9282-7

Cited by 24 publications

(24 citation statements)

References 19 publications

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“…S4). However, the closest modern analogues for the earlier period occur in the present-day central Mongolian Larix-Betula forest zone 17 . Diatom-based reconstructions show that HCO 3 À concentrations temporarily reached 900 mg l À 1 during the early Holocene, with a marked decrease from 7,100 to 4,500 cal yr BP to B150 mg l À 1 today.…”

Section: Resultsmentioning

confidence: 99%

“…Surface samples from sites that were later used for reconstructions were excluded from the calibration set. In addition to our data from Yakutia, a diatom data set of 26 Mongolian lakes 17 was included to improve potentially the reliability of the reconstructions of late glacial-early Holocene conditions at Ulakhan Chabyda where a high abundance of Cyclotella radiosa was recorded, which has no modern analogues in the modern Yakutian data set. Weighted-averaging partial leastsquares regressions were implemented with C2 software version 1.3 (ref.…”

Section: Methodsmentioning

confidence: 99%

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Siberian larch forests and the ion content of thaw lakes form a geochemically functional entity

et al. 2013

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Siberian larch forests and the ion content of thaw lakes form a geochemically functional entity

et al. 2013

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“…Even extreme events such as floods and earthquakes can be identified using diatoms (Nelson et al 1996;Kashima 2003;Atwater et al 2004;Borromei et al 2010;Schütt et al 2010;Wiklund et al 2010;Saegusa et al 2011). Some environmental variables can be estimated quantitatively using diatom-based transfer functions (Shinneman et al 2009(Shinneman et al , 2010.…”

Section: Introductionmentioning

confidence: 99%

Increased precipitation during the Little Ice Age in northern Taiwan inferred from diatoms and geochemistry in a sediment core from a subalpine lake

et al. 2013

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We studied diatoms in a 55.5-cm-long sediment core from a subalpine lake in northern Taiwan, Tsuifong Lake (TFL), to investigate environmental changes from AD 490 to present. Diatom assemblages of the last century were dominated by acidophilous species, whereas alkaliphilous taxa dominated the record between AD 1480 and 1910. Over the studied time frame, four decadal periods with high precipitation were inferred from evidence of elevated soil input from the watershed, supported by the stable isotope signatures (d 15 N, d 13 C) of organic matter and magnetic susceptibility of the sediments. We compared the inferred changes in pH of TFL to values obtained from three other Taiwanese subalpine lakes. The present study revealed that elevated precipitation was associated with increased solar irradiance over the last five centuries, with a stable dry period between AD 490 and 1450. Acidification of TFL in the last *100 years was a consequence of deforestation and acid rain.

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“…Although several areas in western Mongolia have received protected status during the last few decades, actual conservation efforts remain low to non-existent in practice. Regional freshwater resources are under severe stress resulting from global warming and changes in land use (Shinneman et al, 2009b). Mean annual temperature in Mongolia has increased by 1.8°C during the period 1940-2001 (Batima, 2006).…”

Section: Introductionmentioning

confidence: 99%

The ecology of ostracodes (Ostracoda, Crustacea) in western Mongolia

et al. 2010

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Aquatic biota in Central Asia witnesses and faces a changing environment. Because ostracodes contribute to both extant and fossil lacustrine diversity, they can be used to track evolution in water quality. Living ostracode communities in a variety of aquatic habitats of western Mongolia were analyzed in relation to environmental and hydrochemical variables of those habitats, based on presence/absence data from net samples. The sampled water bodies represent broad gradients in ionic concentration and composition. Ostracode community composition of springs differed from all other sampled habitats, which was also reflected in CCA analyses. Our data indicated that the ostracode fauna of western Mongolia shows a high response to calcium content, alkalinity, salinity, temperature, nutrients, and altitude. Species composition and diversity seem to be determined by solute evolution dominated by Ca-depletion. In general, this seems to be an important regulator of lacustrine ostracode species composition in several semi-arid regions. Binary logistic regression was used to predict the occurrence of the most common species with a minimal set of environmental variables. The resulting models showed on average low performance, and mainly demonstrated the potential of such modeling to predict the distribution of typical bio-indicator species

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Diatoms as indicators of water quality in Western Mongolian lakes: a 54-site calibration set

Cited by 24 publications

References 19 publications

Siberian larch forests and the ion content of thaw lakes form a geochemically functional entity

Siberian larch forests and the ion content of thaw lakes form a geochemically functional entity

Increased precipitation during the Little Ice Age in northern Taiwan inferred from diatoms and geochemistry in a sediment core from a subalpine lake

The ecology of ostracodes (Ostracoda, Crustacea) in western Mongolia

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