Spatial patterns and co-occurrence networks of microbial communities related to environmental heterogeneity in deep-sea surface sediments around Yap Trench, Western Pacific Ocean

Zhang, Chenru; Liu, Qian; Li, Xianrong; Wang, Min; Liu, Xiaoshou; Yang, Jinjuan; Xu, Jishang

doi:10.1016/j.scitotenv.2020.143799

Cited by 45 publications

(19 citation statements)

References 67 publications

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“…In addition, we also found that some generalist and specialist taxa presented in the same module within the co‐occurrence network. This indicates that these taxa may have similar trophic preferences or similar ecophysiological responses to different environmental conditions in the sediments (Zhang et al ., 2021). Previous studies indicated that keystone taxa possess disproportionately more important roles in maintaining network structure than other microorganisms in a network, and the disappearance of these putative keystone taxa may cause networks to disassemble (Jordan, 2009; Faust and Raes, 2012; Sun et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Liu

et al. 2022

Environmental Microbiology

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Microbial metacommunities normally comprise generalists and specialists. Uncovering the mechanisms underlying the diversity patterns of these two subcommunities is crucial for aquatic biodiversity maintenance. However, little is known about the ecological assembly processes and co-occurrence patterns of the habitat generalists and specialists across large spatial scales in plateau lake sediments, particularly regarding their environmental adaptations. Here, we investigated assembly processes of the habitat generalists and specialists in sediment of Tibetan lakes and their role in the stability of metacommunity cooccurrence network. Our results showed that the habitat generalists exhibited broader environmental thresholds and closer phylogenetic clustering than specialist counterparts. In contrast, the specialists exhibited stronger phylogenetic signals of ecological preferences compared with the habitat generalists. Stochastic processes dominated the habitat generalist (63.2%) and specialist (81.3%) community assembly. Sediment pH was the major factor mediating the balance between stochastic and deterministic processes in the habitat generalists and specialists. In addition, as revealed by network analysis, the habitat specialists played a greater role in maintaining the stability of metacommunity co-occurrence network. The insights gained from this study can be helpful to understand the mechanisms underlying maintenance of sediment microbial diversity in plateau lakes.

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Section: Discussionmentioning

confidence: 99%

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Liu

et al. 2022

Environmental Microbiology

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“…43 Therefore, the higher positive correlations in these networks may indicate the synergetic effect among different functional genes to complete the functions of material circulation and energy metabolism with abundant electron donors (i.e., Fe 2+ , S 2− ) and the carbon resource (i.e., the slow-release carbon resource of PHBV). 44 Obviously, according to the degree of node connection, the C_ FeS2 group was the highest, followed by FeS2, PHBV, and C_ PHBV. On one hand, it was verified again that the pyrite surface was in the mixotrophic system hot area for N and P cycling.…”

Section: Resultsmentioning

confidence: 93%

“…In the co-occurrence patterns, the positive associations might reflect similar niches or mutualisms, while negative associations might be indicative of differences in growth constraints among taxa or antagonism . Therefore, the higher positive correlations in these networks may indicate the synergetic effect among different functional genes to complete the functions of material circulation and energy metabolism with abundant electron donors (i.e., Fe 2+ , S 2– ) and the carbon resource (i.e., the slow-release carbon resource of PHBV) . Obviously, according to the degree of node connection, the C_ FeS2 group was the highest, followed by FeS2, PHBV, and C_ PHBV.…”

Section: Results and Discussionmentioning

confidence: 99%

Difference and Network Analysis of Functional Genes Revealed the Hot Area of Carbon Degradation, Nitrogen, Phosphorus, and Sulfur Cycling in Blending Systems with Pyrite and Poly(3-hydroxybutyrate-hydroxyvalerate) for Nitrogen and Phosphorus Removal

et al. 2022

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A higher denitrification rate was realized via controlling the mass ratio of pyrite and poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) under natural aerobic conditions. The results showed that the suitable mass ratio of PHBV and pyrite could be 1:2 with its removal efficiency of nitrogen and phosphorus of 99.7 and 53.4%, respectively. The PHBV/pyrite system has formed the spatial patterns of the biofilm community, such as Dechloromons attached to the pyrite surface, Rhodocyclaceae attached to the PHBV surface, and Acidovorax attached to the suppled sludge, which highlighted that the autotrophic− heterotrophic synergy was achieved. The difference analysis among functional genes detected by high-throughput quantitative polymerase chain reaction indicated that the surface of pyrite in the pyrite/PHBV system is the hot area of methane production, the denitrifying process, and phosphorus removal. Network analysis indicated that there was a closer connection among functional genes on the pyrite surface, also supporting the speculation that pyrite was the hot area for the interaction of various genes in the pyrite/PHBV system. The key gene co-occurrence revealed that lig, nirS, and aspA are the keystone genes for cellulose degradation, denitrification, and S cycling, respectively. These results suggested that the pyrite surface was the hot area for denitrification, phosphorus removal in the blending system with pyrite and PHBV for nitrogen and phosphorus removal.

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“…20 The different media (e.g., surface water and sediment) in which microplastics exist may also affect the formation of biofilms owing to the distinct contents and forms of components (free nutrients and microbes in water versus adhered ones in sediment, higher amount of minerals in sediment than in surface water). 21,22 Hence, it is important to consider the effects of aging and environmental media when studying the ecosystem-level impacts of microplastics.…”

Section: ■ Introductionmentioning

confidence: 99%

Bioaccessibility of Microplastic-Associated Antibiotics in Freshwater Organisms: Highlighting the Impacts of Biofilm Colonization via an In Vitro Protocol

Liu

Dai

Bie

et al. 2022

Environ. Sci. Technol.

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Microplastics in the environment can be colonized by microbes capable of forming biofilms, which may act as reactive coatings to affect the bioaccessibility of pollutants in organisms. This study investigated the dynamic evolution of biofilm colonization on microplastics and its impacts and mechanisms on the bioaccessibility of microplastic-associated sulfamethazine (SMT) via microcosm incubation in surface water and sediment. After 60 days of incubation, the microbial communities formed in microplastics were distinct and more diverse than those untethered in surroundings, and photoaging treatment decreased the affinity of biofilms on microplastics due to decreased hydrophobicity. Biofilm formation further enhanced the desorption and bioaccessibility of microplastic-sorbed SMT in organisms. In vitro experiments indicated that the critical effects were mainly related to the stronger interaction of gastrointestinal components (i.e., pepsin, bovine serum albumin (BSA), and NaT) with biofilm components (e.g., extracellular polymer substances) than with the pure surface of microplastics, which competed for binding sites in microplastics for SMT more significantly. Photoaging decreased the enhancing effects of biofilms due to their lower accumulation in aged microplastics. This study is the first attempt to reveal the role of biofilms in the bioaccessibility of microplastics with associated antibiotics and provide insights into the combined risk of microplastics in the environment.

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Spatial patterns and co-occurrence networks of microbial communities related to environmental heterogeneity in deep-sea surface sediments around Yap Trench, Western Pacific Ocean

Cited by 45 publications

References 67 publications

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Difference and Network Analysis of Functional Genes Revealed the Hot Area of Carbon Degradation, Nitrogen, Phosphorus, and Sulfur Cycling in Blending Systems with Pyrite and Poly(3-hydroxybutyrate-hydroxyvalerate) for Nitrogen and Phosphorus Removal

Bioaccessibility of Microplastic-Associated Antibiotics in Freshwater Organisms: Highlighting the Impacts of Biofilm Colonization via an In Vitro Protocol

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