Organic Matter Pollution During the Spring Thaw in Hulun Lake Basin: Contribution of Multiform Human Activities

Wang, Wenlin; Li, Wenjing; Yan, Yan; Liu, Bo; Wang, Tanjing; Mao, Sichen; Song, Linhui; Dou, Huashan; Ao, Wen; Zou, Changxin

doi:10.1007/s00128-020-02911-z

Cited by 18 publications

(6 citation statements)

References 30 publications

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“…Therefore, anthropogenic activities can be regarded as the main factors influencing the spatial pattern of trophic level in lakes in Inner Mongolia. This result is consistent with those of previous studies on lakes in eastern Inner Mongolia (Yang et al, 2019;Wang et al, 2020). However, the results of the present study further showed that grazing intensity was the main factor driving the spatial pattern of lake eutrophication in Inner Mongolia of China, slightly different from those acting on lakes in Mongolia.…”

Section: Factors Driving the Spatial Variations In Lake Water Qualitysupporting

confidence: 93%

“…These lakes are of great significance to regional ecological environment security, climate regulation, and social and economic development. In addition, Inner Mongolia encompasses a large area and contains typical semi-arid and arid climate areas, and the water quality conditions of lakes are different among the different areas (Wang et al, 2015;Zhang et al, 2019;Wang et al, 2020). Therefore, Inner Mongolia is an ideal study region for examining the spatial changes of lake water quality.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the deterioration of lake water quality caused by climate change and the rapid development of the regional economy and urbanization has attracted more and more scientific attention (Liu and Wang, 2014;Wang et al, 2015;Yang et al, 2019). There are some studies on the water quality of lakes in Inner Mongolia, such as Hulun Lake (Chen et al, 2012;Wang et al, 2020), Dalinuoer Lake (Liu et al, 2015;Zhen et al, 2015), and Ulansuhai Lake (Zhang et al, 2019;Jin et al, 2020). Since these studies mainly focused on individual lakes and nutrient indicators, there remains a lack of comprehensive research on the spatial patterns and driving mechanisms of water quality in lakes across the entire Inner Mongolia.…”

Section: Introductionmentioning

confidence: 99%

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Spatial changes and driving factors of lake water quality in Inner Mongolia, China

Ren

Liu

et al. 2022

J. Arid Land

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Lakes play important roles in sustaining the ecosystem and economic development in Inner Mongolia Autonomous Region of China, but the spatial patterns and driving mechanisms of water quality in lakes so far remain unclear. This study aimed to identify the spatial changes in water quality and the driving factors of seven lakes (Juyanhai Lake, Ulansuhai Lake, Hongjiannao Lake, Daihai Lake, Chagannaoer Lake, Hulun Lake, and Wulannuoer Lake) across the longitudinal axis (from the west to the east) of Inner Mongolia. Large-scale research was conducted using the comprehensive trophic level index (TLI (Σ)), multivariate statistics, and spatial analysis methods. The results showed that most lakes in Inner Mongolia were weakly alkaline. Total dissolved solids and salinity of lake water showed obvious zonation characteristics. Nitrogen and phosphorus were identified as the main pollutants in lakes, with high average concentrations of total nitrogen and total phosphorus being of 4.05 and 0.21 mg/L, respectively. The values of TLI (Σ) ranged from 49.14 to 71.77, indicating varying degrees of lake eutrophication, and phosphorus was the main driver of lake eutrophication. The lakes of Inner Mongolia could be categorized into lakes to the west of Daihai Lake and lakes to the east of Daihai Lake in terms of salinity and TLI (Σ). The salinity levels of lakes to the west of Daihai Lake exceeded those of lakes to the east of Daihai Lake, whereas the opposite trend was observed for lake trophic level. The intensity and mode of anthropogenic activities were the driving factors of the spatial patterns of lake water quality. It is recommended to control the impact of anthropogenic activities on the water quality of lakes in Inner Mongolia to improve lake ecological environment. These findings provide a more thorough understanding of the driving mechanism of the spatial patterns of water quality in lakes of Inner Mongolia, which can be used to develop strategies for lake ecosystem protection and water resources management in this region.

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Section: Factors Driving the Spatial Variations In Lake Water Qualitysupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial changes and driving factors of lake water quality in Inner Mongolia, China

Ren

Liu

et al. 2022

J. Arid Land

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“…It is located in the Hulunbuir grassland of the Inner Mongolian autonomous region (Zhang et al, 2018). When the water level of Hulun Lake is 545.3 m, the water storage volume is ∼13.8 billion m 3 , the water surface area is ∼2,339 km 2 , the maximum water depth is 8 m, and the average water depth is 5.7 m (Inner Mongolia Hulun Lake to national nature reserve annals) (Wang et al, 2020). Overall, Hulun Lake is an irregular oblique long shape, showing a northeast southwest trend.…”

Section: Site Description and Sample Collectionmentioning

confidence: 99%

Total Arsenic, pH, and Sulfate Are the Main Environmental Factors Affecting the Microbial Ecology of the Water and Sediments in Hulun Lake, China

Shang

Wei

et al. 2020

Front. Microbiol.

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Bacteria have the metabolic potential to produce a diverse array of secondary metabolites, which have important roles in biogeochemical cycling processes. However, for Hulun Lake and the rivers that enter into it, the bacterial community structures and their effects have not previously been widely studied, limiting our ecological understanding of this habitat. To address this, we have analyzed the bacterial communities in the water ecosystem of the Hulun Lake Basin. 16S rRNA highthroughput sequencing identified 64 phyla, 165 classes, 218 orders, 386 families, and 740 genera of bacteria across all samples. The dominant phyla in the central area of the lake were Proteobacteria, Actinobacteria, Firmicutes, and Cyanobacteria, while in all other areas, Proteobacteria, Actinobacteria, and Bacteroidetes were dominant. The microbial community structures were significantly affected by environmental factors [arsenic (As), pH, and sulfate (SO 4 2−)] and their location in the lake. The species richness in the sediments of Hulun Lake was higher than in the water, and this ecosystem harbored the highest proportion of unclassified sequences, representing unclassified bacteria. This study provides basic data for future investigations into the Hulun lake ecosystem and for water microbial monitoring and protection measures.

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“…Its topography is irregularly sloping and elongated, flanked by expansive grasslands and a flat terrain. It covers an approximate surface area of 2,043 km 2 and exhibits climatic characteristics such as a multi-year average temperature of −0.60°C, precipitation of 352.30 mm, evaporation of 1549.80 mm, and wind speed of 3.45 m/s (Li et al, 2019;Wang W. L. et al, 2020). Influenced primarily by the mid-temperate continental monsoon climate, the region experiences pronounced seasonal variability, including short spring and summer seasons and prolonged winter.…”

Section: Introductionmentioning

confidence: 99%

Composition, interaction networks, and nitrogen metabolism patterns of bacterioplankton communities in a grassland type Lake: a case of Hulun Lake, China

Shi,

Li,

Guo

2023

Front. Microbiol.

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The composition of bacterial communities in freshwater ecosystems is influenced by numerous factors including environmental conditions and biological interactions. In grassland inland closed lakes, factors affecting lake ecosystems are either exogenous or endogenous, contributing to the formation of distinct habitats in the surface and bottom waters of the bacterial communities. However, the extent to which environmental factors selectively shape the bacterial communities in aquatic systems remains unclear. Therefore, we sampled the surface, middle, and bottom waters at 13 sampling points in each layer. High-throughput sequencing techniques were employed to examine the spatial heterogeneity of the bacterial community structure during summer in Hulun Lake, the largest grassland-type lake in Inner Mongolia, China, to determine the microbial community dynamics and symbiosis patterns under different habitat conditions. Our results revealed a decrease in the diversity and heterogeneity of the bacterioplankton community, influenced by changes in the environment from exogenous inputs to endogenous releases. Furthermore, this alteration in community structure was concomitant with enhanced co-occurrences among microorganisms in the bottom water layers. This finding suggests that endogenous release promotes heightened symbiotic interactions, thereby facilitating the development of more complex modular structures. Symbiotic networks in different layers were differentiated by key species, with the ecological clustering modules of these species demonstrating dissimilar environmental preferences. The microbial communities were highly habitat-specific, mimicking responses to total nitrogen (TN) in the surface layer, pH in the middle layer, and chemical oxygen demand (COD) in the bottom layer. Bacterioplankton functions were assessed using Tax4Fun, indicating exogenous inputs and endogenous release increased the relative abundance of genes with nitrogen-fixing and nitrification potential nitrogen metabolism functions in surface and bottom waters, respectively. With Planctomycetota and Proteobacteria phyla as potential key groups for regulating nitrogen metabolic processes, Proteobacteria may facilitate the depletion of nitrate in surface and bottom waters, while the close contact of surface waters with the atmosphere accelerated Planctomycetota-dominated nitrogen fixation into the lake. Our findings contribute to the understanding of vertical microbial diversity and its network patterns in grassland type lakes, underscoring the potential role of environmental factors (exogenous inputs and endogenous releases) in bacterioplankton community formation.

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Organic Matter Pollution During the Spring Thaw in Hulun Lake Basin: Contribution of Multiform Human Activities

Cited by 18 publications

References 30 publications

Spatial changes and driving factors of lake water quality in Inner Mongolia, China

Spatial changes and driving factors of lake water quality in Inner Mongolia, China

Total Arsenic, pH, and Sulfate Are the Main Environmental Factors Affecting the Microbial Ecology of the Water and Sediments in Hulun Lake, China

Composition, interaction networks, and nitrogen metabolism patterns of bacterioplankton communities in a grassland type Lake: a case of Hulun Lake, China

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