Stochastic processes shape microeukaryotic community assembly in a subtropical river across wet and dry seasons

Microbiome, Journal Year: 2019, Volume and Issue: 7(1)

Published: Oct. 22, 2019

Abstract Background The deep mechanisms (deterministic and/or stochastic processes) underlying community assembly are a central challenge in microbial ecology. However, the relative importance of these processes shaping riverine microeukaryotic biogeography is still poorly understood. Here, we compared spatiotemporal and biogeographical patterns using high-throughput sequencing 18S rRNA gene multivariate statistical analyses from subtropical river during wet dry seasons. Results Our results provide first description communities Tingjiang River, largest west Fujian province, southeastern China. showed that microeukaryotes both seasons exhibited contrasting compositions, which might be owing to planktonic having seasonal succession patterns. Further, all components (including total, dominant, always rare, conditionally rare taxa) significant distance-decay pattern seasons, had stronger relationship season, especially for taxa. Although several variables influence on communities, environmental spatial factors minor roles communities. Importantly, were strongly driven by processes, with 89.9%, 88.5%, 89.6% variation explained neutral model wet, dry, respectively. also large fraction across different taxonomic groups levels. Additionally, taxa, above below prediction, ecologically taxonomically distinct groups, interactively structured deterministic processes. Conclusions This study demonstrated sufficient substantial metacommunity hydrographic regimes, thereby providing better understanding patterns, waters.

Language: Английский

---

Abundant fungi adapt to broader environmental gradients than rare fungi in agricultural fields

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(8), P. 4506 - 4520

Published: April 23, 2020

Abstract Soil communities are intricately linked to ecosystem functioning, and a predictive understanding of how assemble in response environmental change is great ecological importance. Little known about the assembly processes governing abundant rare fungal across agro‐ecosystems, particularly with regard their adaptation. By considering taxa, we tested thresholds phylogenetic signals for preferences complex gradients reflect adaptation, explored factors influencing based on large‐scale soil survey agricultural fields eastern China. We found that taxa exhibited remarkably broader stronger compared taxa. Neutral played key role shaping subcommunity subcommunity. Null model analysis revealed was less clustered phylogenetically governed primarily by dispersal limitation, while homogeneous selection major process available sulfur factor mediating balance between stochastic deterministic both subcommunities, as indicated an increase stochasticity higher concentration. Based macroecological spatial scale datasets, our study potential adaptation identified distinct community fields. These results contribute mechanisms underlying generation maintenance diversity global change.

Language: Английский

---

Soil pH and temperature regulate assembly processes of abundant and rare bacterial communities in agricultural ecosystems

Environmental Microbiology, Journal Year: 2019, Volume and Issue: 22(3), P. 1052 - 1065

Published: Oct. 10, 2019

Summary The factors determining stochastic and deterministic processes that drive microbial community structure, specifically the balance of abundant rare bacterial taxa, remain underexplored. Here we examined biogeographic patterns taxa explored environmental influencing their assembly in agricultural fields across eastern China. More phylogenetic turnover correlating with spatial distance was observed than sub‐communities. Homogeneous selection main process for both sub‐communities; however, sub‐community more tightly clustered phylogenetically sensitive to dispersal limitations sub‐community. Rare rice maize were governed by processes, which showed higher operational taxonomic unit richness. We propose a conceptual paradigm wherein soil pH mean annual temperature mediate sub‐communities respectively. A leads For sub‐community, dominance stochasticity low‐temperature regions indicates weaker niche‐based exclusion arrival evolutionary lineages. These findings suggest are dependent on distinct variables agro‐ecosystems.

Language: Английский

---

Spatiotemporal dynamics of the archaeal community in coastal sediments: assembly process and co-occurrence relationship

The ISME Journal, Journal Year: 2020, Volume and Issue: 14(6), P. 1463 - 1478

Published: March 4, 2020

Studies of marine benthic archaeal communities are updating our view their taxonomic composition and metabolic versatility. However, large knowledge gaps remain with regard to community assembly processes inter taxa associations. Here, using 16S rRNA gene amplicon sequencing qPCR, we investigated the spatiotemporal dynamics, processes, co-occurrence relationships in 58 surface sediment samples collected both summer winter from across ~1500 km eastern Chinese marginal seas. Clear patterns dynamics structure were observed, a more pronounced spatial rather than seasonal variation. Accompanying geographic variation was significant distance-decay pattern varying contributions different clades, determined by relative abundance. In seasons, dispersal limitation most important process, explaining ~40% variation, followed homogeneous selection ecological drift, that made an approximately equal contribution (~30%). This meant stochasticity determinism had greater impact on assembly. Furthermore, observed seasonality patterns: closer inter-taxa connections summer, unmatched between relationship. These results demonstrate assembled under seasonal-consistent mechanism but changed over indicating complex dynamic coastal sediments

Language: Английский

---

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Environmental Microbiology, Journal Year: 2019, Volume and Issue: 22(3), P. 832 - 849

Published: Aug. 30, 2019

Summary Despite the essential functions of sedimentary bacterial and fungal communities in biogeochemical cycling, little is known about their biogeographic patterns driving processes large rivers. Here we investigated assemblies co‐occurrence Jinsha River, one largest rivers southwestern China. The mainstream river was divided into upstream, midstream downstream. results showed that both differed significantly among three sections. For communities, composition variations all sites or each section were controlled by combination dispersal limitation environmental selection, dominant factor. Compared with bacteria, fungi had stronger limitation. Co‐occurrence network analyses revealed higher connectivity but a lower proportion positive interaction than at sites. In particular, keystone species belonging to phyla Proteobacteria Firmicutes Ascomycota Chytridiomycota may play critical roles maintaining community function. Together, these observations indicate have influence less implying different assembly mechanisms ecological between bacteria

Language: Английский

---

Homogeneous selection dominates the microbial community assembly in the sediment of the Three Gorges Reservoir

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 690, P. 50 - 60

Published: July 2, 2019

Language: Английский

---

Microbial assembly, interaction, functioning, activity and diversification: a review derived from community compositional data

Marine Life Science & Technology, Journal Year: 2019, Volume and Issue: 1(1), P. 112 - 128

Published: Sept. 30, 2019

Abstract Microorganisms play crucial roles in maintaining ecosystem stability. The last two decades have witnessed an upsurge studies on marine microbial community composition using high-throughput sequencing methods. Extensive mining of the compositional data has provided exciting new insights into ecology from a number perspectives. Both deterministic and stochastic processes contribute to assembly but their relative importance structuring subcommunities, that are categorized by traits such as abundance, functional type activity, differs. Through correlation-based network analysis, significant progress been made unraveling co-occurrence patterns dynamics response environmental changes. Prediction functioning, based data, is receiving increasing attention, closely related microbes often share similar ecological diversity exhibits correlations functioning. functioning likely executed not whole community, rather active fraction which can be inferred marker gene transcription level members. Furthermore, huge amount significantly expanded tree life illuminated phylogenetic divergence evolutionary history. This review summarizes important findings assembly, interaction, activity diversification, highlighting interacting different aspects, derived data.

Language: Английский

---

Environmental adaptation is stronger for abundant rather than rare microorganisms in wetland soils from the Qinghai‐Tibet Plateau

Molecular Ecology, Journal Year: 2021, Volume and Issue: 30(10), P. 2390 - 2403

Published: March 14, 2021

Disentangling the biogeographic patterns of rare and abundant microbes is essential in order to understand generation maintenance microbial diversity with respect functions they provide. However, little known about ecological assembly processes environmental adaptation across large spatial-scale wetlands. Using Illumina sequencing multiple statistical analyses, we characterized taxonomic phylogenetic bacteria fungi Qinghai-Tibet Plateau wetland soils. Abundant taxa exhibited broader thresholds stronger signals for traits than ones. By contrast, showed higher sensitivity changes closer clustering The null model analysis revealed that dispersal limitation belonging stochastic process dominated community assemblies bacteria, fungi, while variable selection deterministic governed bacteria. Neutral variation partitioning further confirmed were less environmentally constrained. Soil ammonia nitrogen was crucial factor mediating balance between stochasticity determinism both microbes. may have better potential are dispersed by Our findings extend knowledge ongoing change could facilitate prediction biodiversity loss caused probably climate human activity

Language: Английский

---

Assembly of abundant and rare bacterial and fungal sub-communities in different soil aggregate sizes in an apple orchard treated with cover crop and fertilizer

Soil Biology and Biochemistry, Journal Year: 2021, Volume and Issue: 156, P. 108222 - 108222

Published: March 20, 2021

Language: Английский

---

Similar geographic patterns but distinct assembly processes of abundant and rare bacterioplankton communities in river networks of the Taihu Basin

Water Research, Journal Year: 2022, Volume and Issue: 211, P. 118057 - 118057

Published: Jan. 12, 2022

Language: Английский

---