Regional and local environment drive biogeographic patterns in intertidal microorganisms

Xu, Yuan; Chen, Xinyi; Zhang, Jiawei; Soininen, Janne

doi:10.1111/jbi.14460

Cited by 5 publications

(9 citation statements)

References 53 publications

(87 reference statements)

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“…One explanation is that bacterial communities are filtered by large-scale environmental conditions. Similar findings were reported by Xu et al (2022) that benthic ciliate communities along the coast of China were driven by large-scale environmental filtering related to the outflow of the Yangtze River. Another possible explanation may be the prevalence of generalist bacteria, which can adapt to a wide range of conditions (Székely and Langenheder 2014).…”

Section: Assembly Processes Governing Bacterial Communities Across Sp...supporting

confidence: 90%

“…1a): high‐latitude region (latitude > 35°N; hereafter REG_H), middle‐latitude region (35°N > latitude > 25°N; hereafter REG_M) and low‐latitude region (latitude < 25°N; hereafter REG_L). This separation generally corresponds to the three ecoregions suggested by former studies (Spalding et al 2007, Xu et al 2022). Sampling sites (1 m 2 ) were in the mid‐tidal zone at 100 m intervals, and the number of sites per beach (6–18) was proportional to the length of the beach (Fig.…”

Section: Methodssupporting

confidence: 81%

“…For representing the physical status of each beach, beach index (BI; McLachlan 1980) was adopted. The details for obtaining maximum spring tidal range (maxTR), beach slope and BI were described in Xu et al (2022). Two widely used climatic variables (mean annual temperature and annual precipitation) were also obtained at beach level from WorldClim at 30 s resolution (Hijmans et al 2005).…”

Section: Sampling and Data Collectionmentioning

confidence: 99%

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Scale dependency of community assembly differs between coastal marine bacteria and fungi

Xu,

Chen,

Graco‐Roza

et al. 2023

Ecography

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It is often assumed that community assembly processes, i.e. deterministic or stochastic factors determining the structure of communities, vary with spatial scale. However, evidence showing such scale‐dependency is challenging to gather, especially in microbial communities.Here we studied the relative importance of potential community assembly processes of bacterial and fungal communities across the coastline of China. We used null models based on phylogenetic and compositional turnover to quantify the relative importance of the processes at three spatial scales (local, regional and subcontinental). We used a generalized multinomial logistic regression to estimate the probability of observing the different assembly processes along environmental and spatial gradients. We found that, overall, deterministic processes are stronger in driving the assembly of bacterial communities compared to fungal communities, especially at the local scale. Moreover, the assembly processes in bacterial communities exhibit clear scale‐dependency, with homogeneous selection being the dominant process at the local scale, and dispersal limitation dominating at regional and subcontinental scales. Conversely, drift is consistently the dominant driver of fungal community assembly across all spatial scales. Our findings demonstrate scale‐dependency in community assembly processes between two marine microbial groups, and highlight the importance of adopting a multi‐scale approach to gain insights into the complex and dynamic spatial patterns of microbial communities.

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Section: Assembly Processes Governing Bacterial Communities Across Sp...supporting

confidence: 90%

Section: Methodssupporting

confidence: 81%

Section: Sampling and Data Collectionmentioning

confidence: 99%

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Scale dependency of community assembly differs between coastal marine bacteria and fungi

Xu,

Chen,

Graco‐Roza

et al. 2023

Ecography

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“…Soil bacterial α‐diversity is known to be governed by both species pool and local community assembly mechanisms (Xu et al., 2022). Moreover, the effects of species pools and local assembly processes will vary dramatically between saturated and unsaturated communities.…”

Section: Discussionmentioning

confidence: 99%

Species pool, local assembly processes: Disentangling the mechanisms determining bacterial α‐ and β‐diversity during forest secondary succession

Zhang,

Dai,

Huang

et al. 2023

Molecular Ecology

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Across ecology, and particularly within microbial ecology, there is limited understanding how the generation and maintenance of diversity. Although recent work has shown that both local assembly processes and species pools are important in structuring microbial communities, the relative contributions of these mechanisms remain an important question. Moreover, the roles of local assembly processes and species pools are drastically different when explicitly considering the potential for saturation or unsaturation, yet this issue is rarely addressed. Thus, we established a conceptual model that incorporated saturation theory into the microbiological domain to advance the understanding of mechanisms controlling soil bacterial diversity during forest secondary succession. Conceptual model hypotheses were tested by coupling soil bacterial diversity, local assembly processes and species pools using six different forest successional chronosequences distributed across multiple climate zones. Consistent with the unsaturated case proposed in our conceptual framework, we found that species pool consistently affected α‐diversity, even while local assembly processes on local richness operate. In contrast, the effects of species pool on β‐diversity disappeared once local assembly processes were taken into account, and changes in environmental conditions during secondary succession led to shifts in β‐diversity through mediation of the strength of heterogeneous selection. Overall, this study represents one of the first to demonstrate that most local bacterial communities might be unsaturated, where the effect of species pool on α‐diversity is robust to the consideration of multiple environmental influences, but β‐diversity is constrained by environmental selection.

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“…The marine ecoregion is a global bioregionalization of coastal and shelf areas and is used widely in macroorganisms [25]. Recent studies on sedimental archaea and ciliates, and planktonic microeukaryotes also showed that the biogeographical patterns of microorganisms, similar to macroorganisms, correspond well with the ecoregional delineations [26,55,57]. Our findings confirmed that the clustering of communities was primarily driven by the habitat types (e.g., water vs. sediment) and, within each habitat type, there were notable regional effects (e.g., ecoregions) [58].…”

Section: Similar Biogeographical Patterns With Distinct Assembly Mech...mentioning

confidence: 99%

Different Microeukaryotic Trophic Groups Show Different Latitudinal Spatial Scale Dependences in Assembly Processes across the Continental Shelves of China

Zhang,

Qu,

Zhang

et al. 2024

Microorganisms

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The relative role of stochasticity versus determinism is critically dependent on the spatial scale over which communities are studied. However, only a few studies have attempted to reveal how spatial scales influence the balance of different assembly processes. In this study, we investigated the latitudinal spatial scale dependences in assembly processes of microeukaryotic communities in surface water and sediment along the continental shelves of China. It was hypothesized that different microeukaryotic trophic groups (i.e., autotroph, heterotroph, mixotroph, and parasite) showed different latitudinal scale dependences in their assembly processes. Our results disclosed that the relative importance of different assembly processes depended on a latitudinal space scale for planktonic microeukaryotes. In surface water, as latitudinal difference increased, the relative contributions of homogenous selection and homogenizing dispersal decreased for the entire community, while those of heterogeneous selection and drift increased. The planktonic autotrophic and heterotrophic groups shifted from stochasticity-dominated processes to heterogeneous selection as latitudinal differences surpassed thresholds of 8° and 16°, respectively. For mixotrophic and parasitic groups, however, the assembly processes were always dominated by drift across different spatial scales. The balance of different assembly processes for the autotrophic group was mainly driven by temperature, whereas that of the heterotrophic group was driven by salinity and geographical distance. In sediment, neither the entire microeukaryotic community nor the four trophic groups showed remarkable spatial scale dependences in assembly processes; they were always overwhelmingly dominated by the drift. This work provides a deeper understanding of the distribution mechanisms of microeukaryotes along the continental shelves of China from the perspective of trophic groups.

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Regional and local environment drive biogeographic patterns in intertidal microorganisms

Cited by 5 publications

References 53 publications

Scale dependency of community assembly differs between coastal marine bacteria and fungi

Scale dependency of community assembly differs between coastal marine bacteria and fungi

Species pool, local assembly processes: Disentangling the mechanisms determining bacterial α‐ and β‐diversity during forest secondary succession

Different Microeukaryotic Trophic Groups Show Different Latitudinal Spatial Scale Dependences in Assembly Processes across the Continental Shelves of China

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