Seasonal Variation and Vertical Distribution of Inorganic Nutrients in a Small Artificial Lake, Lake Bulan, in Mongolia DOI Open Access

Bat-Erdene Ariunsanaa,

Seiya Nagao,

Baasanjav Zorigt

et al.

Water, Journal Year: 2022, Volume and Issue: 14(12), P. 1916 - 1916

Published: June 14, 2022

This is the first seasonal observation study on nutrient dynamics undertaken in a small freshwater lake with eutrophication Mongolia. The vertical profile and fluctuation of nutrients are crucial to understanding biogeochemical cycles aquatic systems. In this study, field research was carried out at shallow lake, Lake Bulan, lower Kharaa River basin. area has been receiving increased loads from water catchment for last 20 years. Water samples were collected seasonally 2019–2022 analyzed nutrients, major cations, trace metals, dissolved organic carbon. average concentration inorganic nitrogen (DIN) surface had wide variation 0.26 ± 0.11 mg N/L August 1.44 0.08 January. Seasonal differences also observed profiles. Concentrations relatively similar various depths April September turnover time. Thermal stratification when covered ice, maximum concentrations being bottom layer months January August. phosphate showed trend. These results indicate that both summer winter stratifications important regeneration layer, biochemical cycling, mitigating impacts global warming lakes

Language: Английский

Factors affecting seasonal variation of microbial community structure in Hulun Lake, China DOI
Yongquan Shang,

Xiaoyang Wu,

Xibao Wang

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 805, P. 150294 - 150294

Published: Sept. 11, 2021

Language: Английский

Citations

74
Effect of fulvic acid concentration levels on the cleavage of piperazinyl and defluorination of ciprofloxacin photodegradation in ice DOI

Zhuojuan Li,

Deming Dong,

Liwen Zhang

et al.

Environmental Pollution, Journal Year: 2022, Volume and Issue: 307, P. 119499 - 119499

Published: May 18, 2022

Language: Английский

Citations

26
Impact of Urbanisation Intensity on Bird Diversity in River Wetlands around Chaohu Lake, China DOI Creative Commons

XU Qing-ru,

Lizhi Zhou,

Shanshan Xia

et al.

Animals, Journal Year: 2022, Volume and Issue: 12(4), P. 473 - 473

Published: Feb. 14, 2022

Urbanisation is known to result in ‘urban stream syndrome’, which poses a huge threat the river health. Birds, are an important part of ecosystem, sensitive environmental changes basin. The ratio impervious surface area macroscopic indicator urbanisation intensity basins. In this study, we combined results year-round field survey seven wetlands around Chaohu Lake (China) with satellite remote sensing image data from same period. species richness at sections lake entrance was higher than middle river, and Shannon–Wiener index during autumn that winter. waterbird diversity declined exponentially increases urbanisation. land use patterns associated resulted loss food resources habitats. Therefore, driving factor leads bird community structure wetlands, so it had significant impact on wetland birds all four seasons variety influencing factors. Our research could be guide for urban landscape planning protection. For example, suggested necessary identify as reduced building area, increased vegetation coverage, retained slope protection beach land.

Language: Английский

Citations

19
The Utilization of Dissolved Organic Matter Spectral and Molecular Properties in Freshwater Eutrophication Studies: A Mini Review DOI Open Access

Yan Wen-gang,

Jun Xing,

Chunzhao Chen

et al.

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 151 - 151

Published: Jan. 8, 2025

Eutrophication is a major environmental issue affecting freshwater ecosystems worldwide. While its impact on the composition of dissolved organic matter (DOM) well recognized, relationships between DOM’s optical and molecular properties across eutrophication gradients remain underexplored. This review synthesizes recent research (derived from UV-Vis absorption fluorescence spectroscopy) characteristics (analyzed using Fourier-transform ion cyclotron resonance mass spectrometry, FT-ICR MS) in systems varying trophic states. Generalized additive model (GAM) analysis was used to assess correlations state index (TSI). The carbon (DOC), a254, SUVA254, SR, HIX, BIX, FI averaged 11.44 ± 11.97 mg/L, 23.23 16.95 m−1. 2.98 0.99 L·mg−1·m−1, 1.42 0.38, 2.38 1.31, 1.08 0.16, 2.11 0.44, respectively, mesotrophic middle-eutrophic sites. GAM results revealed significant linear correlation DOC properties, including FI, with TSI, suggesting that DOM accumulation intensifies eutrophication. such as O/C H/C ratios, double bond equivalents (DBEs), CHOS% content, exhibited nonlinear TSI. These trends imply shift sources terrestrial macrophyte-derived inputs those dominated by algal- sediment-derived progresses. We concluded indices alone may not serve reliable indicator states; future studies should focus integrating both offer more comprehensive assessment Given limited number variables examined this study, work only offers preliminary investigation into relationship changes More systematic focusing molecular-level analyses states broader geographic scale are needed.

Language: Английский

Citations

0
Fe(III)-mediated sediment sequestration of phosphate and humic acid: Timing of inputs regulates environmental processes DOI
Feng Wu,

Luo Chunyan,

YueHan Lu

et al.

Chemical Geology, Journal Year: 2025, Volume and Issue: unknown, P. 122778 - 122778

Published: April 1, 2025

Language: Английский

Citations

0
Characteristics, Sources, and Seasonal Variability of Dissolved Organic Matter (DOM) in the Ganges River, Bangladesh DOI
Nahin Mostofa Niloy, Md. Morshedul Haque, Shafi M. Tareq

et al.

Environmental Processes, Journal Year: 2021, Volume and Issue: 8(2), P. 593 - 613

Published: Feb. 15, 2021

Language: Английский

Citations

25
Binding of waterborne pharmaceutical and personal care products to natural dissolved organic matter DOI Creative Commons
Simone Rizzuto, Didier L. Baho, Kevin C. Jones

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 784, P. 147208 - 147208

Published: April 21, 2021

Information on how key environmental conditions such as natural dissolved organic matter (DOM) and water pH alter the possible risks posed by pharmaceuticals (PPCPs) is still scarce. In our previous study, presence of DOM at high reduced toxicity a mix waterborne PPCPs to algae. DOM-complexation effect speciation more hydrophobic neutral compounds was suggested be driving this behaviour. However, study design did not allow verification hypothesis. Here, DOM- interaction different investigated for 6 through equilibrium dialysis, under same study. Association with confirmed pH. The results suggest binding driven i) carboxylic groups PPCPs, ii) shifting structural configuration DOM, making it suited bind some PPCPs. A non-linear change capacity increasing concentration also observed among tested

Language: Английский

Citations

24
Hybridized machine learning models for phosphate pollution modeling in water systems for multiple uses DOI
Tales Humberto de Aquino Boratto,

Deivid E.D. Campos,

Douglas L. Fonseca

et al.

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 64, P. 105598 - 105598

Published: June 10, 2024

Language: Английский

Citations

3
Widespread declines in water salinity of the endorheic Tibetan Plateau lakes DOI Creative Commons
Chunqiao Song,

Shuangxiao Luo,

Kai Liu

et al.

Environmental Research Communications, Journal Year: 2022, Volume and Issue: 4(9), P. 091002 - 091002

Published: Sept. 1, 2022

Abstract The Tibetan Plateau (TP) hosts more than one thousand lakes (>1km 2 ) in its endorheic basins. changing climate recent decades has led to significant modifications the hydrologic system. Most TP experienced dramatically expanding areas, rising water levels, and increasing storage, which inevitably influenced lake salinity. This study provides a regional-scale investigation of salinity changes (for 83 with two-epoch records, among approximately 160 >50km by synthesizing multi-source data around 1970s 2010s. Our results reveal considerably declined for most across mean 62 terminal dropped from 92.76 g l −1 42.00 during 1970s–2010s, contrast slight variations (3.42 1.48 21 exorheic or upstream lakes. As result, many hypersaline have become polysaline oligosaline lakes, such as Cedo Caka, Norma Co, etc. In particular, some large (e.g., Siling ‘Twin Lakes’, Ayakkum Lake) also drops salinity, exceptional cases Nam Co Qinghai Lake probably due relatively low ratios increased mass their net storages. widespread declining salinities could greatly influence bacterial richness, diversity, evenness, affect aquatic carbon cycle utilization high-altitude More attention should be paid on understanding saline ecosystem evolution regional response

Language: Английский

Citations

15
Understanding the changes of optically active substances (OACs) in Hulun Lake in the past 35 years and its indication to the degradation of aquatic ecology DOI
Hao Zhang, Bo Yao, Shengrui Wang

et al.

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 377, P. 134286 - 134286

Published: Sept. 23, 2022

Language: Английский

Citations

15