Evaluating the Impact of Environmental Factors on Bacterial Populations in Riverine, Estuarine, and Coastal Sediments DOI Creative Commons
Ramganesh Selvarajan, Ming Yang, Henry Joseph Oduor Ogola

et al.

Diversity, Journal Year: 2024, Volume and Issue: 16(12), P. 749 - 749

Published: Dec. 6, 2024

Aquatic ecosystems, including rivers, estuaries, and coastal environments, are crucial for maintaining biodiversity, regulating nutrient cycles, supporting human livelihoods. However, these ecosystems increasingly being threatened by urbanization, making it essential to understand their microbial communities ecological roles. This study employed high-throughput 16S rRNA gene sequencing characterize the bacterial within riverine, estuarine, sediments of Adyar Creek, Chennai, India. Proteobacteria were dominant phylum across most samples, with proportions ranging from 39.65% 72.09%. Notably, estuarine environment exhibited a distinct taxonomic profile characterized significant abundance Firmicutes (47.09% population). Distinct classes observed sediment types: Alphaproteobacteria (30.07–34.32%) in riverine sediments, Bacilli dominated (40.17%), Gammaproteobacteria (15.71–51.94%) sediments. The environmental factors influencing community composition samples pH, salinity, phosphate, nitrate. LEfSe (Linear discriminant analysis Effect Size) identified specific genera estuary, Bacillus (20.26%), unclassified_Paenibacillus (12.87%), Clostridium (3.81%), Gailella (3.17%), Paenibacillus (3.02%), Massilia (1.70%), Paraburkholderia (1.42%), Pantoea (1.15%), as potential biomarkers habitat health. Functional revealed an elevated expression genes associated ABC transporters carbon metabolism suggesting heightened cycling capacity. Furthermore, co-occurrence network indicated that exhibit strong modular structure complex species interactions three types. These findings highlight communities’ critical role key drivers establishing baseline further investigations into functional ecology vulnerable ecosystems.

Language: Английский

Microbial Community Structure and Causal Analysis. in Sediments of Shallow Eutrophic Freshwater Lakes. Under Heavy Metal Compound Pollution DOI

Yang Chen,

Yaofei Xu,

Aidong Ruan

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 487, P. 137135 - 137135

Published: Jan. 7, 2025

Language: Английский

Citations

1
Analysis of bacterial community structure, functional variation, and assembly mechanisms in multi-media habitats of lakes during the frozen period DOI Creative Commons
Zixuan Zhang, Junping Lu, Sheng Zhang

et al.

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 284, P. 116903 - 116903

Published: Aug. 27, 2024

Ice, water, and sediment represent three interconnected habitats in lake ecosystems, bacteria are crucial for maintaining ecosystem equilibrium elemental cycling across these habitats. However, the differential characteristics driving mechanisms of bacterial community structures ice, sediments seasonally frozen lakes remain unclear. In this study, high-throughput sequencing technology was used to analyze compare structure, function, network characteristics, assembly communities Wuliangsuhai, a typical cold region Inner Mongolia. The results showed that ice water phases had similar diversity composition, with Proteobacteria, Bacteroidota, Actinobacteria, Campilobacterota, Cyanobacteria as dominant phyla. displayed significant differences from Chloroflexi, Firmicutes, Desulfobacterota, Acidobacteriota being Notably, exhibited higher spatial variability their distribution than those sediment. This study also revealed during period, species media were dominated by cooperative relationships. Community primarily influenced stochastic processes, dispersal limitation drift identified two most factors within process. heterogeneous selection played role composition. Furthermore, functions related nitrogen, phosphorus, sulfur, carbon, hydrogen vary among These findings elucidate intrinsic structure changes quality different (ice, sediment) cold-zone freezing offering new insights environmental protection ecological restoration efforts such environments.

Language: Английский

Citations

4
Microbial community dynamics in shallow-water grass-type lakes: Habitat succession of microbial ecological assembly and coexistence mechanisms DOI Creative Commons
Feng Chen, Junping Lu, Tingxi Liu

et al.

Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 291, P. 117819 - 117819

Published: Feb. 1, 2025

Aggregation and co-occurrence patterns of microbial communities are the key scientific issues in lake ecology. To explore mechanisms ecological assembly community succession this unique habitat, 16 samples were collected from eight sites Wuliangsuhai Lake. Second-generation DNA sequencing was applied to reveal spatial dynamics bacterial structure distribution across two environmental media nutrient-rich shallow grassland elucidate characteristics network. This study also examined effects filtering biological interactions on formation maintenance composition diversity. The results highlight habitat heterogeneity composition, with no discernible latitudinal diversity patterns. causal analysis identified electrical conductivity, pH, total nitrogen, phosphorus as primary factors driving changes water sediment grass-type lakes, TN being driver. CL500-3 a pollution-tolerant species aquatic environments. g__norank_f_Verrucomicrobiaceae exhibited significant distance decay pattern, higher turnover rate than sediment. Co-occurrence network revealed greater complexity stability communities, three potential keystone species, water. neutral null model indicated that more susceptible dispersal limitation, whereas complex increased role deterministic processes construction. proposed division plant regions freshwater lakes demonstrated different types, contributing comprehensive understanding shallow-water structure.

Language: Английский

Citations

0
Estuarine fine particles enhance nitrogen elevation and nutritional imbalance in coastal and offshore waters DOI
Xiangqing Kong, Nana Hu, Wenjing Wang

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133179 - 133179

Published: March 1, 2025

Language: Английский

Citations

0
Vertical distribution and environmental controls of methane cycling processes and associated microbial communities in Lake Chaohu sediments DOI

Siyan Li,

Zhipeng Wei,

Yaofei Xu

et al.

International Biodeterioration & Biodegradation, Journal Year: 2025, Volume and Issue: 203, P. 106105 - 106105

Published: May 4, 2025

Language: Английский

Citations

0
Stability characteristics of bacterial and protistan communities along an estuarine continuum: diversity, composition and co-occurrence networks DOI
Jianming Wu,

Lihua Niu,

Yi Li

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: 269, P. 120920 - 120920

Published: Jan. 21, 2025

Language: Английский

Citations

0
Seasonal freeze-thaw significantly alters the distinct aquifers solute transport, microbial community assembly patterns, and molecular ecological networks in the hyporheic zone DOI
Dong Li, Yuling Zhang, Xiaosi Su

et al.

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123555 - 123555

Published: March 1, 2025

Language: Английский

Citations

0
Seasonal distribution patterns of P-cycling-related microbes and its association with internal phosphorus release in the eutrophic Lake Chaohu, China DOI
Tingting Sun,

Linlin Zhu,

Tao Huang

et al.

Journal of Environmental Sciences, Journal Year: 2024, Volume and Issue: 154, P. 226 - 237

Published: Aug. 4, 2024

Language: Английский

Citations

1
Characterization of bacterial community dynamics dominated by salinity in lakes of the Inner Mongolian Plateau, China DOI Creative Commons
Xin Guo,

Xiaohong Shi,

Shi Yujiao

et al.

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

Published: Aug. 21, 2024

Microorganisms in lakes are sensitive to salinity fluctuations. Despite extensive prior research on bacterial communities, our understanding of their characteristics and assembly mechanisms lakes, especially desert with different salinities. To address this issue, we collected three samples from freshwater six brackish five salt the Badanjilin Desert. The 16S rRNA gene sequencing was applied investigate interactions rising salinity, community coexistence patterns, mechanisms. Our findings suggested that increased lake significantly reduces diversity enhanced differentiation. Significant variations were observed contribution biomarkers Cyanobacteria, Chloroflexi, Halobacterota composition communities. communities exhibited a higher susceptibility limitations than those lakes. In addition, null modeling analyses confirmed quantitative biases stochastic processes across freshwater, brackish, saline With increasing significance undominated diffusion limitation decreased slightly, influence homogenizing dispersal increased. However, stochasticity remained dominant process all analysis co-occurring networks revealed reduced complexity network structures altered interspecific interactions, resulting interspecies collaboration levels. Under stress, key taxon Cyanobacteria ( Schizothrix_LEGE_07164 ) replaced by Proteobacteria Thalassobaculum Polycyclovorans Thermotogota SC103 results indicated symbiotic patterns varying gradients offer insights into potential aggregation, thereby enhancing distribution response changes.

Language: Английский

Citations

1
Evaluating the Impact of Environmental Factors on Bacterial Populations in Riverine, Estuarine, and Coastal Sediments DOI Creative Commons
Ramganesh Selvarajan, Ming Yang, Henry Joseph Oduor Ogola

et al.

Diversity, Journal Year: 2024, Volume and Issue: 16(12), P. 749 - 749

Published: Dec. 6, 2024

Aquatic ecosystems, including rivers, estuaries, and coastal environments, are crucial for maintaining biodiversity, regulating nutrient cycles, supporting human livelihoods. However, these ecosystems increasingly being threatened by urbanization, making it essential to understand their microbial communities ecological roles. This study employed high-throughput 16S rRNA gene sequencing characterize the bacterial within riverine, estuarine, sediments of Adyar Creek, Chennai, India. Proteobacteria were dominant phylum across most samples, with proportions ranging from 39.65% 72.09%. Notably, estuarine environment exhibited a distinct taxonomic profile characterized significant abundance Firmicutes (47.09% population). Distinct classes observed sediment types: Alphaproteobacteria (30.07–34.32%) in riverine sediments, Bacilli dominated (40.17%), Gammaproteobacteria (15.71–51.94%) sediments. The environmental factors influencing community composition samples pH, salinity, phosphate, nitrate. LEfSe (Linear discriminant analysis Effect Size) identified specific genera estuary, Bacillus (20.26%), unclassified_Paenibacillus (12.87%), Clostridium (3.81%), Gailella (3.17%), Paenibacillus (3.02%), Massilia (1.70%), Paraburkholderia (1.42%), Pantoea (1.15%), as potential biomarkers habitat health. Functional revealed an elevated expression genes associated ABC transporters carbon metabolism suggesting heightened cycling capacity. Furthermore, co-occurrence network indicated that exhibit strong modular structure complex species interactions three types. These findings highlight communities’ critical role key drivers establishing baseline further investigations into functional ecology vulnerable ecosystems.

Language: Английский

Citations

0