Irreversible community difference between bacterioplankton generalists and specialists in response to lake dredging

Yang, Yuyi; Zhang, Weihong; Liu, Wenzhi; He, Donglan; Wan, Wenjie

doi:10.1016/j.watres.2023.120344

Cited by 10 publications

(2 citation statements)

References 66 publications

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“…This raises a fascinating question about the coexistence of bacterial taxa within generalists or specialists, which -for over 50 years -has been a major issue in ecological theory, where the number of species often appears to exceed the available niches, a phenomenon commonly known as 'The paradox of the plankton' (Hutchinson, 1961). The coexistence of bacterial taxa between generalists and specialists can be influenced by different strategies, such as intra-specific variation, dormancy potential and evolutionary potential (He et al, 2023;Xu, Luo, et al, 2022;Yang et al, 2023). However, bacterial taxa within generalists or specialists have similar ecological strategies, but how they coexist remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Patterns of bacterial generalists and specialists in lakes and reservoirs along a latitudinal gradient

Zuo,

Liu,

Xiao

et al. 2023

Global Ecol Biogeogr

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AimThe geographical distribution of bacteria is an important, but poorly understood, topic in microbial ecology. A major question is how broadly distributed generalist taxa, and limitedly distributed specialist taxa, vary across a latitudinal gradient in freshwater ecosystems. We predict that: (a) generalists and specialists exhibit latitudinal diversity gradient with different patterns; (b) their community assemblies are mainly driven by stochastic processes; and (c) generalists coexist through niche differences, while specialists coexist through fitness differences.LocationSixty lakes and reservoirs in China, ranging from 18° N to 50° N.Time PeriodJuly–August in 2012 and 2018.Taxa StudiedBacterioplankton.MethodsWe clustered zero‐radius operational taxonomic unit (zOTU) (subspecies‐like level) into operational taxonomic unit (OTU) (species‐like level) and calculated the intra‐specific variation and spatial asynchrony of OTU. We examined the relative effects of environment versus space (latitude) on bacterial community and quantified the community assembly processes of generalists and specialists, respectively. The binary‐state speciation and extinction (BiSSE) model has been used to estimate the evolutionary characteristics. The abundances of the top zOTUs within each OTU were identified to reveal their niche preferences (distribution patterns at different sites).ResultsWe found that bacterial generalists had a higher intra‐specific variation, greater asynchrony and wider niche width than the specialists. With increasing latitude, bacterial diversity decreased with abundance variations in generalists and occurrence variations in specialists, respectively. Diversification in stochastic processes was the main driving factor in both groups, though deterministic processes showed greater effects on specialists than generalists in local communities. Bacterial generalists coexisted through niche differences, whereas specialists coexisted through average fitness differences.Main ConclusionsWe demonstrated distinct latitudinal distribution patterns of bacterial generalists and specialists. These results highlight differences in biogeography of microbial generalist and specialist taxa mediated by intra‐specific variation and emphasize their distinctly vital roles mediated by differing mechanisms in freshwater ecosystems.

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Section: Introductionmentioning

confidence: 99%

Patterns of bacterial generalists and specialists in lakes and reservoirs along a latitudinal gradient

Zuo,

Liu,

Xiao

et al. 2023

Global Ecol Biogeogr

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“…3 These disturbances can also lead to the occurrence of primary producer succession. For instance, (i) hydraulic projects can cause succession from river-dominated species to lake-dominated species; 4 (ii) lake dredging could change landscape patterns of bacterioplankton generalists and specialists; 5 and (iii) succession patterns of aquatic plants are related to the intensity of changes in the external environment. 6 However, research on the legacy effects of habitat disturbance on aquatic plants has been scant thus far.…”

Section: Introductionmentioning

confidence: 99%

Habitat Disturbance Drives the Feedback of Aquatic Plants on the Microbial Community after Lake Degradation

Yu,

Lu,

Cao

et al. 2024

ACS EST Water

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Globally intensified lake system degradation has been attributed to high-intensity disturbance and emerged as a significant driver of the declines in lake biodiversity and ecosystem stability. However, potential alterations in feedback mechanisms between aquatic plants and microorganisms after ecological succession are still unclear. This study delves into the influence of aquatic plants on sediment bacterial diversity and nutrient dynamics across different growth phases using Illumina MiSeq sequencing and diffusive gradients in thin film analysis. Our results indicate that the surface temperature of the research area has increased from 20 to 28 °C over the past 25 years, and the dominant species has shifted to Stuckenia pectinata. Constructive species show responsive changes in their organ's stoichiometric characteristics to adapt to environmental changes. The growth of S. pectinata could affect the diffusion fluxes of NH 4 + −N, NO 3 − −N, P, and Fe at the sediment−water interface. Morever, the deterministic processes of environmental filtering and competition may have altered the microorganisms in the rhizosphere of S. pectinata, temperature, and water depth were major drivers of seasonal microbial changes. These results in the driver-response relationship of multiple stressors in the lake ecosystem may contribute to the development of engineering projects focusing on restoring aquatic plants.

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Deciphering diverse colonization patterns of plastisphere generalists and specialists in greenhouse soils

Wang,

Gao,

Zeng

et al. 2024

Applied Geochemistry

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Irreversible community difference between bacterioplankton generalists and specialists in response to lake dredging

Cited by 10 publications

References 66 publications

Patterns of bacterial generalists and specialists in lakes and reservoirs along a latitudinal gradient

Patterns of bacterial generalists and specialists in lakes and reservoirs along a latitudinal gradient

Habitat Disturbance Drives the Feedback of Aquatic Plants on the Microbial Community after Lake Degradation

Deciphering diverse colonization patterns of plastisphere generalists and specialists in greenhouse soils

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