<i>Diatoma kalakulensis</i>sp. nov. – a new diatom (Bacillariophyceae) species from a high-altitude lake in the Pamir Mountains, Western China

Peng, Yumei; Rioual, Patrick; Williams, David M.; Zhang, Zhongyan; Zhang, Fei; Jin, Zhangdong

doi:10.1080/0269249x.2017.1335239

Cited by 4 publications

(3 citation statements)

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“…Within the genus Diatoma , species can be distinguished by using valve outline, shape of the apices, valve dimensions, stria density, transapical rib density, and number and position of rimoportulae (e.g., Bąk et al 2014 ; Peng et al 2017 ). The valve outline and dimensions of D. sinensis can be usefully compared to those of D. moniliformis and D. tenuis (Table 1 ).…”

Section: Discussionmentioning

confidence: 99%

“…The configuration of girdle bands (i.e., in a cell, the ratio between the number of girdle bands associated with the epivalve and those associated with the hypovalve, sensu Mann 1982 ), has rarely been mentioned in studies on the genus Diatoma . Williams (1985) mentioned that D. moniliformis has five girdle bands, and Peng et al (2017) only noted that the cingulum of D. kalakulensis is composed of 1–3 open bands. As seen above, in a normal cell (i.e., one not dividing), D. sinensis has a 4:2 configuration of girdle bands (four bands associated with the epivalve, two with the hypovalve, Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Williams ( Jüttner et al 2017 ). More recently, Peng et al (2017) described Diatoma kalakulensis Peng, Rioual and D.M. Williams from a high-altitude lake in western China.…”

Section: Introductionmentioning

confidence: 99%

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Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Yuan¹,

Liu²,

Rioual³

et al. 2022

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Lake Qinghai is an ancient brackish water lake in which several endemic diatom species have been discovered. In this study, a species of Diatoma is observed under light and scanning electron microscopy and described as new, Diatoma sinensissp. nov. The living cells of D. sinensis always lie in girdle view due to the cell depth being much larger than valve width (3.3–8.8 vs. 2.0–3.0 μm). The valves of D. sinensis are characterized by their narrow, linear-lanceolate outline, with capitate to subcapitate apices, the presence of two rimoportulae, one at each apex, embedded in the last rib or located among striae and a 4:2 configuration of girdle bands in normal vegetative cells, with four bands assigned to the epivalve and two to the hypovalve. The new taxon is compared with similar species from the genera Diatoma and Distrionella.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Yuan¹,

Liu²,

Rioual³

et al. 2022

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Re-examination of Cyclotella lacunarum Hustedt (Bacillariophyta) from lakes in the Pamir Mountains, western China, and description of two similar Lindavia taxa collected from Tajikistan and Nepal

et al. 2020

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A record of Holocene climate changes in central Asia derived from diatom-inferred water-level variations in Lake Kalakuli (Eastern Pamirs, western China)

2022

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The unique geographical and climatic settings of the eastern Pamirs make this region sensitive to the Westerlies and global climate change. Holocene fluctuations in water-level of Lake Kalakuli, a proglacial lake located to the northwest of the Muztag Ata glacier, were reconstructed based on diatoms from a ∼15 m long sediment core spanning the last ∼9,900 years. To establish how diatom species distribute in relation to water depth in Lake Kalakuli, a dataset of 45 surface sediment samples was retrieved from different water depth. Statistical analyses such as cluster analysis (TWINSPAN) and redundancy analysis (RDA) were used to demonstrate that the water depth gradient is the main environmental gradient driving the distribution of these diatom assemblages. A diatom-water depth transfer function, was then developed using a weighted averaging partial least squares component 2 model (R2 = 0.89, RMSEP = 1.85 m) and applied to the Holocene diatom sequence from Lake Kalakuli. Due to the large residual errors in the model only the general trends in water level are proposed. Effective moisture increased rapidly during the early Holocene, as the water depth reached a high level from the lowest level within about two thousand years. Only small amplitude fluctuations were recorded during the mid- and late Holocene until the last few hundred years when a marked increase occurred. Changes in summer insolation over the northern hemisphere drove the advances and retreats of the Muztag Ata glacier, which in turn controlled the fluctuations of water level in this lake. The diatom-derived paleoclimatic trend from Lake Kalakuli is consistent with the Holocene climate evolution in the Westerlies-dominated area of Central Asia.

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Diatoma kalakulensissp. nov. – a new diatom (Bacillariophyceae) species from a high-altitude lake in the Pamir Mountains, Western China

Cited by 4 publications

References 18 publications

Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Re-examination of Cyclotella lacunarum Hustedt (Bacillariophyta) from lakes in the Pamir Mountains, western China, and description of two similar Lindavia taxa collected from Tajikistan and Nepal

A record of Holocene climate changes in central Asia derived from diatom-inferred water-level variations in Lake Kalakuli (Eastern Pamirs, western China)

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Diatoma kalakulensissp. nov. – a new diatom (Bacillariophyceae) species from a high-altitude lake in the Pamir Mountains, Western China

Cited by 4 publications

References 18 publications

﻿Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

﻿Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Re-examination of Cyclotella lacunarum Hustedt (Bacillariophyta) from lakes in the Pamir Mountains, western China, and description of two similar Lindavia taxa collected from Tajikistan and Nepal

A record of Holocene climate changes in central Asia derived from diatom-inferred water-level variations in Lake Kalakuli (Eastern Pamirs, western China)

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Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China

Diatoma sinensis: a new diatom species (Bacillariophyta) found in the brackish Lake Qinghai, China