Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary DOI
D. M. Li, Bingjun Liu, Yang Lu

et al.

Hydrological Processes, Journal Year: 2023, Volume and Issue: 37(9)

Published: Sept. 1, 2023

Abstract Global warming alters the inherent variability of climate variables and induces more frequent extremes hydroclimatic compound events with substantial impacts. The concurrence hydrological drought saltwater intrusion in estuary can have devastating effects on agricultural production, water security, ecological health. In this study, extreme indices, including Blend Drought Saltwater Index (BDSI), Compound (CDSI) Standardized (SDSI), were constructed to monitor critical zone Pearl River Estuary during dry season from 1999 2016. results reveal that three indices effectively depict different aspects Estuary. Among SDSI performed best depicting drought‐saltwater events, while BDSI outperformed other high value Runoff (SRI) (SSI), CDSI low values SRI SSI. Using those developed we found frequency abnormal moderate increased 9.26% 12.03% period 1999–2016, severe, exceptional rare.

Language: Английский

Structure and assembly process of fungal communities in the Yangtze River Estuary DOI Creative Commons
Wu Qu,

Yaqiang Zuo,

Yixuan Zhang

et al.

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 14

Published: Jan. 8, 2024

Marine fungi are essential for the ecological function of estuarine ecosystems. However, limited studies have reported on structure and assembly pattern fungal communities in estuaries. The purpose this study is to reveal process community Yangtze River Estuary (YRE) by using amplicon sequencing method. Phyla Ascomycota, Basidiomycota, Chytridiomycota were dominant seawater sediment samples from YRE. null model analysis, community-neutral (NCM), phylogenetic normalized stochasticity ratio (pNST) showed that stochastic dominated Drift homogeneous dispersal predominant processes samples, respectively. co-occurrence network analysis more complex closely connected than samples. Mucoromycota potential keystone taxa network. These findings demonstrated importance assembly, thereby widening our knowledge dynamics future utilization YRE ecosystem.

Language: Английский

Citations

3
Field and Numerical Investigations of Wave Effects on Groundwater Flow and Salt Transport in a Sandy Beach DOI
Shengchao Yu, Xuejing Wang, Hailong Li

et al.

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(11)

Published: Nov. 1, 2022

Abstract Coastal dynamic forces, such as waves and tides, altogether drive groundwater circulation salt transport in the intertidal zone. However, few numerical studies have ever considered combined effects of tides. In this study, fluctuations wave height are integrated with tidal level together using an iterative least squares fitting method, which can be acquired from measured sea surf zone, fitted is further verified by wind speed. Groundwater flow were then simulated MARUN code to evaluate impacts after considering effect. The equivalent freshwater head salinity model effect presented less difference data compared results without After incorporating a model, submarine discharge (SGD) was increased, among recirculated SGD grew more rapidly than fresh, leading proportion fresh accounting for small (1.1%). water influx efflux rates increased greatly especially during period high height. Most occurred while considerable amount subtidal algorithm separate mixed field employed identify quantify respective tides on density‐dependent beach flow.

Language: Английский

Citations

14
Boosting nitrogen removal efficiency of wastewater treatment plant tailwater through iron-rich tidal flow constructed wetland: Insights on the microbial removal mechanism DOI
Jiaxing Lu, Qiang Kong, Qian Wang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158207 - 158207

Published: Dec. 1, 2024

Language: Английский

Citations

2
Vertical leaching of paleo-saltwater in a coastal aquifer–aquitard system of the Pearl River Delta DOI
Shengchao Yu,

Jiu Jimmy Jiao,

Xin Luo

et al.

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 626, P. 130168 - 130168

Published: Sept. 15, 2023

Language: Английский

Citations

6
The characteristic of compound drought and saltwater intrusion events in the several major river estuaries worldwide DOI
Dan Li, Bingjun Liu,

Lu Yang

et al.

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 350, P. 119659 - 119659

Published: Nov. 28, 2023

Language: Английский

Citations

6
Analytical study for wave-induced submarine groundwater discharge in subtidal zone DOI
Shengchao Yu, Xiaolang Zhang, Hailong Li

et al.

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 612, P. 128219 - 128219

Published: July 26, 2022

Language: Английский

Citations

10
Microbial Community Structure and Co-Occurrence Patterns in Closed and Open Subsidence Lake Ecosystems DOI Open Access
Shun Wang, Youbiao Hu, Tingyu Fan

et al.

Water, Journal Year: 2023, Volume and Issue: 15(10), P. 1829 - 1829

Published: May 11, 2023

Different types of subsidence lakes formed by underground coal mining are severely polluted mine-production wastewater, domestic sewage, and agricultural irrigation water. Microbial communities perform a crucial role in biogeochemical cycling processes responses to natural anthropogenic disturbances lake waters. Therefore, it is important investigate the characteristics microbial community diversity for utilization water resources areas. In this study, we collected samples from open closed explored bacterial based on Illumina amplicon high-throughput sequencing. Results showed that functional composition differed greatly, was significantly higher than (p < 0.001). Canonical correspondence analysis found pH explained 31.73% 39.98% variation lakes, while NH4+ COD accounted 29.73% 26.02% changes respectively. Modified stochasticity ratios null-model demonstrated stochastic were main factor affecting assembly both (MST = 0.58) 0.63). closed-lake network, hgcI_clade inferred be keystone species, Lactococcus, Acinetobacter, Psychrobacter, Chryseobacterium detected as species open-lake network. By way discussion, provide evidence regarding diversity, structure, co-occurrence patterns, lakes. This study contributes providing reference resources.

Language: Английский

Citations

4
Dispersal limitation determines the ecological processes that regulate the seasonal assembly of bacterial communities in a subtropical river DOI Creative Commons

Aiping Zhu,

Zuobing Liang, Lei Gao

et al.

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: Aug. 26, 2024

Bacteria play a crucial role in pollutant degradation, biogeochemical cycling, and energy flow within river ecosystems. However, the underlying mechanisms governing bacterial community assembly their response to environmental factors at seasonal scales subtropical rivers remain poorly understood. In this study, we conducted 16S rRNA gene amplicon sequencing on water samples from Liuxi River investigate composition, processes, co-occurrence relationships of communities during wet season dry season. The results demonstrated that differences hydrochemistry significantly influenced composition communities. A more heterogeneous structure increased alpha diversity were observed Water temperature emerged as primary driver for changes Dispersal limitation predominantly governed assembly, however, season, its contribution due decreased immigration rates. Co-occurrence network analysis reveals mutualism played prevailing shaping structure. Compared exhibited higher modularity, competition, keystone species resulting stable Although displayed distinct variations, Proteobacteria Actinobacteria consistently abundant maintaining both seasons. Our findings provide insights into how respond changes, uncovering rivers, which are effective management conservation riverine

Language: Английский

Citations

1
Decoupling of diversity and network complexity of bacterial communities during water quality deterioration DOI

Qizhen Feng,

Yuyan Liu, Kaiming Hu

et al.

Journal of Environmental Sciences, Journal Year: 2024, Volume and Issue: 155, P. 86 - 95

Published: Nov. 4, 2024

Language: Английский

Citations

1
Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system DOI Creative Commons
Tong Wu, Le Zhong,

Ji-Wei Pang

et al.

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

Published: April 6, 2023

In this study, the influence of Fe 3+ on N removal, microbial assembly, and species interactions in a biofilm system was determined. The results showed that maximum efficiencies ammonia nitrogen (NH 4 + -N), total (TN), phosphorus (P), chemical oxygen demand (COD) removal were achieved using 10 mg/L , reaching values 100, 78.85, 95.8%, respectively, whereas at concentrations 15 30 suppressed NH -N, TN, COD. terms absolute abundance, expression bacterial amoA narG nirK napA maximal presence (9.18 × 5 8.58 8 1.09 1.07 9 copies/g dry weight, respectively). Irrespective concentrations, P efficiency remained almost 100%. Candidatus _Competibacter (10.26–23.32%) identified as most abundant genus within system. Determinism (50%) stochasticity contributed equally to community assembly. Co-occurrence network analysis revealed 60.94% OTUs exhibited positive interactions, 39.06% negative interactions. Within OTU-based co-occurrence network, fourteen key microbes. stability found be predominantly shaped by cooperation, complemented competition for resources or niche incompatibility. study suggested during wastewater treatment plants methods, concentration supplemental should maintained mg/L, which would not only contribute elimination, but also enhance COD removal.

Language: Английский

Citations

3