Spatial variation of diatom diversity with water depth at Huguang Maar Lake, Southern China

Li, Jingjing; Wang, Luo; Zou, Yao; Li, Jie

doi:10.1007/s10933-021-00218-5

Cited by 4 publications

(3 citation statements)

References 46 publications

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“…In Yulong Lake, an alpine lake in Yunnan (southern China), small Fragilariaceae are dominant throughout the shallow zone from 0 to 5.5 m, and remain abundant in the profundal zone (Zou et al, 2020). In Huguang Maar Lake, a volcanic lake in Guangzhou Province (S. China), Achnanthidium minutissimum and Encyonopsis spp dominate the shallow zone but only few Fragilariaceae are present and no clear mid-depth assemblage can be distinguished (Li et al, 2021). Finally, in Lugu Lake, a deep lake on the Yunnan Plateau, a middepth assemblage was observed but it was mainly composed of Diploneis species while the shallow zone (below 10 m depth) was dominated by small Fragilariaceae, with significant contribution of Achnanthidium minutissum, small Amphora and diverse motile species of Navicula and Nitzschia (Wang et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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 lowest species number of E6 was also reflected by the station's low benthic diatoms diversity (H': 2.053) and equitability (E: 0.7731) values (Table 2). The lowest values of diversity indices at E6 (46.3 m) are attributed to the low productivity due to the low penetration of sunlight towards the seafloor for benthic diatoms to undergo photosynthesis (Li et al, 2022). Also, sunlight could be the limiting factor to species richness at the depth where light intensity is low.…”

Section: Spatial Diversity Of Benthic Diatomsmentioning

confidence: 99%

Common Genus of Benthic Diatoms on the Seafloor of the Southern South China Sea, Peninsular Malaysia - A Preliminary Survey

REDZUAN,

M ABDULLAH,

NORIZAN

2023

UMT JUR

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This study was conducted to determine the diversity of benthic diatom, which is the most ubiquitous group of the microphytobenthos (MPB) collected on the seafloor of the southern South China Sea along the Peninsular coastal waters during a research expedition in March 2019. Triplicates samples were collected from six stations (E1 to E6), and a total of 968 cells representing 17 species of benthic diatoms were identified and recorded. The highest species richness was recorded at E1 with 16 species, and the least number of species was found at E6 with 9 species recorded. The highest density was recorded at E3 with 30 cells cm-2 and the lowest density was found at E6 with only 3 cells cm-2. Coscinodiscus sp. was the most abundant reported species. Although only preliminary, this study provides an essential baseline data especially due to limited information available on the diversity and richness of benthic diatom in the coastal waters of the South China Sea.

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“…Among various pollutants emitted by anthropogenic activities, volatile heavy metals such as Pb and Zn are the most concerning owing to their long-range transport in the atmosphere and persistent toxicity to ecosystems and human health. − Currently, even Earth’s most remote areas (such as the polar and alpine regions) are facing risks of Pb and Zn pollution caused by the atmospheric deposition of these heavy metals. − Historically released Pb and Zn also have far-reaching impacts on the environment due to their persistent toxicity. The anthropogenic emissions of Pb and Zn have been observed to fluctuate over time in different countries. − In general, the industrial structure and the economic growth rates of a country determine its category and intensity of emissions, respectively. , However, the historical Pb and Zn pollution sources of a country are often hard to determine because these heavy metals can be transported long distances from their sources.…”

Section: Introductionmentioning

confidence: 99%

Lake Sediment Archive Reveals a Distinct Response to Anthropogenic Pb and Zn Deposition with Historical Periods: Pb–Zn Isotope Evidence

Xia,

Liu,

Liu

et al. 2023

Environ. Sci. Technol.

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Anthropogenic activities release large quantities of heavy metals into the atmosphere. In China, the input of these heavy metals through local and trans-boundary atmospheric deposition is poorly understood. To assess this issue, herein, we use Pb and Zn isotopes to constrain the sources of Pb and Zn in a 210Pb-dated sediment core collected from the enclosed lake in South China. We observed a progressive shift toward higher 208Pb/206Pb and Pb fluxes (0.79–4.02 μg·cm–2·a–1) from 1850 to 1950 and a consistent decrease in δ66ZnIRMM (as low as −0.097 ± 0.030‰) coupled with an increase in Pb (1.74–3.36 μg·cm–2·a–1) and Zn (8.07–10.44 μg·cm–2·a–1) fluxes after 1980. These distinguished isotopic signals and flux variations reveal the presence of trans-boundary Pb since 1900, with the addition of local industrial Pb and Zn pollution after 1980. Up to 72.3% of Pb deposited at our site can be attributed to long-distance transportation from previously industrialized countries, resulting in a noteworthy legacy of Pb in China since 1900. Despite the phasing out of leaded gasoline, Chinese gasoline still contributes an average of 20.9%. The contribution of China’s mining and smelting activities to Pb has increased steadily since 1980 and remained stable at an average of 25.1% since 2000.

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Spatial variation of diatom diversity with water depth at Huguang Maar Lake, Southern China

Cited by 4 publications

References 46 publications

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

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

Common Genus of Benthic Diatoms on the Seafloor of the Southern South China Sea, Peninsular Malaysia - A Preliminary Survey

Lake Sediment Archive Reveals a Distinct Response to Anthropogenic Pb and Zn Deposition with Historical Periods: Pb–Zn Isotope Evidence

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