Temporal and Spatial Analysis of Trace Metal Ecotoxicity in Sediments of Chaohu Lake, China DOI Creative Commons
Wenguang Luo, Zong‐Jun Li, Ran Yi

et al.

Toxics, Journal Year: 2024, Volume and Issue: 12(12), P. 923 - 923

Published: Dec. 20, 2024

The species sensitivity distribution (SSD) analysis for aquatic ecosystems has been increasingly used in risk assessment. However, existing analyses of the impact trace metals lake sediments on organisms often neglect spatiotemporal variability metal release. This oversight can result ecological assessments that lack specificity. To address this gap, we collected 32 core sediment samples from Lake Chaohu to systematically investigate toxicological risks posed by release eight indicators into overlying water column under four hydrological scenarios throughout year. Results indicated only Cu, Pb, and Zn exhibit persistent risks. comprehensive showed spatial differences, increasing western region eastern region, i.e., < central region. Seasonally, levels are ordered as follows: May September November April following year June August. summer (June August) was identified high-risk area period pollution sediments. Based these conclusions, it is recommended implement control environmental monitoring measures during effectively metals.

Language: Английский

Influences of hydrodynamics on microbial community assembly and organic carbon composition of resuspended sediments in shallow marginal seas DOI
Yangli Che, Chaoran Lin, Shen Li

et al.

Water Research, Journal Year: 2023, Volume and Issue: 248, P. 120882 - 120882

Published: Nov. 15, 2023

Language: Английский

Citations

16
Seasonal sediment phosphate release flux of shallow lakes impacted by dual environmental factors DOI
Wenguang Luo,

Suyao Xu,

Jing Lu

et al.

Journal of Soils and Sediments, Journal Year: 2024, Volume and Issue: 24(3), P. 1377 - 1390

Published: Jan. 24, 2024

Language: Английский

Citations

3
Distribution Patterns of Sediment Organic Carbon Stocks in Shallow Lakes and the Significance for Sustainable Lake Management: Chaohu Lake in Eastern China as a Case Study DOI Creative Commons
Wenguang Luo,

Yan Pan,

Yangzhen Fan

et al.

Land, Journal Year: 2024, Volume and Issue: 13(4), P. 507 - 507

Published: April 12, 2024

Shallow lake sediments have huge potential for carbon storage, but they are vulnerable to various environmental changes and highly susceptible becoming a source of emissions. Understanding the amount sediment storage can provide information about shallow lakes in mitigating climate change. In this study, sampling was conducted at 12 study sites Chaohu Lake, China, water content, grain size, bulk density, organic (SOC) content were examined five layers along vertical direction, respectively, distribution SOC estimated. The results showed that surface west area Lake would release 66,300 t overlying body future. middle east will absorb another 15,900 17,300 TOC from future, respectively. Overall, lake-wide 33,100 into addition, also indicate human activities major influence on change stocks sediments, therefore, proactive measures restoration protection essential because increasing maintaining sustainable manner contribute crucial role play

Language: Английский

Citations

3
Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone DOI Creative Commons

Jitao Huang,

Ze Luo,

Zuopeng Xu

et al.

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: Feb. 10, 2025

During flooding in the Water Level Fluctuation Zone (WLFZ), nutrient levels of nitrogen (N) and phosphorus (P) overlying water fluctuate due to soil release, impacting decomposition plants like Cynodon dactylon . However, limited research on effects these changes plant release dynamics complicates accurate assessments quality impacts. This study used 8 samples with varying initial simulate N P induced by WLFZ nutrients examined Results showed that significantly increased P, especially as particulate (PN) (PP), affecting both water. After 60 days, lost 47.97%-56.01% dry matter, 43.58%-54.48% total (TN), 14.28%-20.50% (TP). Initial PN dissolved (TDN) promoted matter loss, PP TP while TDN inhibited TN loss. By day 60, no positive correlation was found between plant-released or were negatively correlated TP, indicating an inhibitory effect. Further analysis indicates released from supported formation microbial aggregates, enhancing denitrification removal thus improving purification over time.

Language: Английский

Citations

0
Interaction Between Organic Carbon Conversion and Microbial Metabolism in Marginal Seas Sediments During Hydrodynamic Sorting Processes DOI

Ziyang Yang,

Lei Xing, Yangli Che

et al.

Journal of Geophysical Research Oceans, Journal Year: 2025, Volume and Issue: 130(4)

Published: April 1, 2025

Abstract Hydrodynamic sorting processes control the transport of marine sediments in benthic environments marginal seas, affecting distribution associated microbes and organic carbon (OC) composition sediments. However, microbial characteristics variations their impacts on OC stability during hydrodynamic remain insufficiently understood. Here, we analyzed concentrations isotopes phospholipid fatty acids (PLFAs), conducted thermal analysis grain‐size fractionated retrieved along classical pathway from Yellow River delta to Sea. We find that relative abundance anaerobic bacterial PLFAs has positive correlations with proportion pre‐aged negative refractory compounds, bioavailable become more limited pathway. suggest decreasing increasing may facilitate bacteria, metabolism can utilize resuspension The attached produce by‐products including OC, which promote burial environments, important environmental implications such as sequestration seas

Language: Английский

Citations

0
Unraveling the rate-limiting step in microorganisms' mediation of denitrification and phosphorus absorption/transport processes in a highly regulated river-lake system DOI Creative Commons
Jiewei Ding,

Wei Yang,

Xinyu Liu

et al.

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Oct. 13, 2023

River-lake ecosystems are indispensable hubs for water transfers and flow regulation engineering, which have frequent complex artificial hydrological processes, the quality is often unstable. Microorganisms usually affect these systems by driving nutrient cycling process. Thus, understanding key biochemical rate-limiting steps under highly regulated conditions was critical stability of river-lake ecosystems. This study investigated how microorganisms genes involving nitrogen phosphorus contributed to combining 16S rRNA metagenomic sequencing using Dongping system as case study. The results showed that concentrations were significantly lower in lake zones than river inflow outflow (p < 0.05). Pseudomonas, Acinetobacter, Microbacterium associated with nitrate phosphate removal. These promote denitrification (nirB/narG/narH/nasA) absorption transport (pstA/pstB/pstC/pstS). Partial least squares path modeling (PLS-PM) revealed environmental factors (especially velocity COD concentration) a significant negative effect on microbial abundance 0.001). Our provides theoretical support effective management protection transfer function system.

Language: Английский

Citations

8
Temporal and Spatial Analysis of Trace Metal Ecotoxicity in Sediments of Chaohu Lake, China DOI Creative Commons
Wenguang Luo, Zong‐Jun Li, Ran Yi

et al.

Toxics, Journal Year: 2024, Volume and Issue: 12(12), P. 923 - 923

Published: Dec. 20, 2024

The species sensitivity distribution (SSD) analysis for aquatic ecosystems has been increasingly used in risk assessment. However, existing analyses of the impact trace metals lake sediments on organisms often neglect spatiotemporal variability metal release. This oversight can result ecological assessments that lack specificity. To address this gap, we collected 32 core sediment samples from Lake Chaohu to systematically investigate toxicological risks posed by release eight indicators into overlying water column under four hydrological scenarios throughout year. Results indicated only Cu, Pb, and Zn exhibit persistent risks. comprehensive showed spatial differences, increasing western region eastern region, i.e., < central region. Seasonally, levels are ordered as follows: May September November April following year June August. summer (June August) was identified high-risk area period pollution sediments. Based these conclusions, it is recommended implement control environmental monitoring measures during effectively metals.

Language: Английский

Citations

1