Land use intensification destabilizes stream microbial biodiversity and decreases metabolic efficiency

Dang, Chansotheary; Kellner, Elliott; Martin, Gregory D.; Freedman, Zachary; Hubbart, Jason A.; Stephan, Kirsten; Kelly, Charlene N.; Morrissey, Ember M.

doi:10.1016/j.scitotenv.2021.145440

Cited by 11 publications

(5 citation statements)

References 95 publications

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“…The finding aligns with the previous study which reported that forests serve a better condition for microbial diversity and structure richness due to optimal availability of microbial growth development factors, i.e., optimal soil nutrient availability and oxygen levels (Sui et al, 2019). In contrast, anthropogenic activities in managing land (e.g., land use change) alter soil microbial community structures, due to the activity significantly affecting soil pH, phosphorus, soil nitrogen, and total organic carbon (Sui et al, 2019;Dang et al, 2021). It is well-known that soil organic carbon is a nutrient source and an important component in conserving soil microbial diversity and density (Page et al, 2020;Szostek et al, 2022).…”

Section: Microbial Diversitysupporting

confidence: 90%

Changes in Essential Soil Nutrients and Soil Disturbance Directly Affected Soil Microbial Community Structure – A Metagenomic Approach

Wiryawan¹,

Eginarta²,

Hermanto³

et al. 2022

J. Ecol. Eng.

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Soil environment, both biotic (e.g., microbial community) and abiotic (e.g., nutrients and water availability) factors determine soil fertility and health and are directly affected by soil management systems. However, only limited studies evaluate the combined effect of nutrients availability and soil disturbance on the soil bacteria community structure, especially in conventional agricultural practices, on the forests converted to agricultural land. This study aimed to provide a viewpoint of the effect of different soil management systems, i.e., forest soil (natural process) and tilled land, on soil bacteria community structure on forest converted to agricultural land, according to a metagenomics approach. Moreover, each land use was sampled to identify the bacterial community using 16S gene as a biomarker. The sequencing was performed using MinION (Oxford Nanopore Technologies) to read the DNA sequence from each soil sample. Principle Component Analysis (PCA) was performed to comprehend the relationship between availability of nutrients and bacterial diversity. The results revealed that the concentrations of soil micronutrients, such as iron, zinc, and magnesium, were significantly higher in forest soil than in tilled land. According to diversity indices, soil bacteria were more diverse in forest soil than in tilled land. Forest soil had more distinctive taxa than tilled land. Several species comprised the most abundant taxa, such as Candidatus Koribacter versatilis, Candidatus Solibacter usiatus, Rhodoplanes sp., Luteitalea pratensis, and Betaproteobacteria bacterium, were more scarce in tilled land. On the distinctive taxa in each soil sample, Anseongella ginsenosidimutans and Janthinobacterium sp. were the most abundant species in forest and tilled land, respectively. According to PCA analysis, soil management system affected the soil micro-and macronutrients also microbial community structure between forest and tilled land. In conclusion, soil management influences the essential nutrient content and bacterial community structure of soil. Better management should be adopted to maintain soil quality near forest soil.

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Section: Microbial Diversitysupporting

confidence: 90%

Changes in Essential Soil Nutrients and Soil Disturbance Directly Affected Soil Microbial Community Structure – A Metagenomic Approach

Wiryawan¹,

Eginarta²,

Hermanto³

et al. 2022

J. Ecol. Eng.

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“…Land-use types have a profound effect on freshwater communities, their biodiversity and on the ecosystem functions they provide [1,51]. However, our results underline that regional landuse effects determine microbial community assembly by primarily shaping local environmental conditions.…”

Section: Discussionmentioning

confidence: 60%

“…This clear separation beyond taxonomic domains, suggests that environmental filtering and species sorting are the main processes underpinning the microbial community structure [52][53][54]. Different land use type-associated community composition also point to differences in water quality and microbial activity with altered stream metabolism possibly affecting higher trophic levels through altered food web structure [14,51]. The strong observed impact of environmental filtering on the microbial meta-community supports their potential as bioindicators for the assessment of environmental conditions [55].…”

Section: Discussionmentioning

confidence: 92%

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Local eukaryotic and bacterial stream community assembly is shaped by regional land use effects

Weigel

Graco-Roza

Hultman

et al. 2023

ISME Communications

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With anticipated expansion of agricultural areas for food production and increasing intensity of pressures stemming from land-use, it is critical to better understand how species respond to land-use change. This is particularly true for microbial communities which provide key ecosystem functions and display fastest responses to environmental change. However, regional land-use effects on local environmental conditions are often neglected, and, hence, underestimated when investigating community responses. Here we show that the effects stemming from agricultural and forested land use are strongest reflected in water conductivity, pH and phosphorus concentration, shaping microbial communities and their assembly processes. Using a joint species distribution modelling framework with community data based on metabarcoding, we quantify the contribution of land-use types in determining local environmental variables and uncover the impact of both, land-use, and local environment, on microbial stream communities. We found that community assembly is closely linked to land-use type but that the local environment strongly mediates the effects of land-use, resulting in systematic variation of taxon responses to environmental conditions, depending on their domain (bacteria vs. eukaryote) and trophic mode (autotrophy vs. heterotrophy). Given that regional land-use type strongly shapes local environments, it is paramount to consider its key role in shaping local stream communities.

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“…30 Further, in-stream sediment microbial communities 33 and their correlation with land-use patterns have also been reported. 34 However, the impact of biotic factors (multiple fecal sources) and abiotic factors (landuse and in-stream physiochemical parameters) on the occurrence and persistence of ARGs has never been examined. Moreover, previous research indicated a strong correlation between land-use patterns and fecal pollution.…”

Section: ■ Introductionmentioning

confidence: 99%

Tracking Sources and Dissemination of Indicator Antibiotic Resistance Genes at a Watershed Scale

Tarek,

Hubbart,

Garner

2024

ACS EST Water

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Fecal contamination of surface water from anthropogenic sources that contain antibiotic resistance genes (ARGs) poses a potential risk to human health. Therefore, identifying ARG sources is essential for protecting drinking and recreational water. An investigation was undertaken to determine anthropogenic ARG sources in a representative mixed-land-use watershed in the Northeastern United States to examine the relationships between ARGs, microbial source tracking (MST) markers, and in-stream physiochemistry. Monthly water samples were collected from 11 sites throughout one year, including the confluence of key firstorder streams representing distinct land-use types. Five anthropogenic indicator ARGs (oqxA, ermB, sul1, mexE, tetO) were monitored to quantify ARG loading and help identify ARG sources. The monitoring efforts revealed that human inputs via sewer, septic failure, or illicit discharge and agriculture were dominant ARG sources. Results also indicated that anthropogenic ARGs were more persistent in the surface water than Escherichia coli or MST markers, suggesting they may integrate into the native microbial community. Understanding the impact of different fecal sources on ARG loading is crucial for developing sustainable and effective watershed management plans to control fecal and ARG contamination and protect drinking and recreational water.

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Land use intensification destabilizes stream microbial biodiversity and decreases metabolic efficiency

Cited by 11 publications

References 95 publications

Changes in Essential Soil Nutrients and Soil Disturbance Directly Affected Soil Microbial Community Structure – A Metagenomic Approach

Changes in Essential Soil Nutrients and Soil Disturbance Directly Affected Soil Microbial Community Structure – A Metagenomic Approach

Local eukaryotic and bacterial stream community assembly is shaped by regional land use effects

Tracking Sources and Dissemination of Indicator Antibiotic Resistance Genes at a Watershed Scale

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