The Missing Metric: An Evaluation of Fungal Importance in Wetland Assessments

Onufrak, Aaron J.; Rúa, Megan A.; Hossler, Katie

doi:10.1007/s13157-019-01228-w

Cited by 14 publications

(4 citation statements)

References 46 publications

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“…Among the bacteria, only Actinobacteria were negatively correlated with heavy metals, indicating that Actinobacteria was sensitive to heavy metals and that low concentrations of heavy metal pollution can reduce its abundance. Previous research has demonstrated that AP and AN had a strong influence on fungal communities in rhizosphere soil and bulk soils, while soil moisture contributed significantly to determine the structure of fungal communities in wetland soils (Onufrak et al, 2019;Wang Y. et al, 2022). In the present study, environmental factors cluster differently in fungi compared to bacteria.…”

Section: Discussion the Response Of Microbial Communities To Heavy M...mentioning

confidence: 48%

Bacterial–fungal interactions and response to heavy metal contamination of soil in agricultural areas

Li,

Zheng,

Liu

et al. 2024

Front. Microbiol.

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IntroductionLong-term heavy metal contamination of soil affects the structure and function of microbial communities. The aim of our study was to investigate the effect of soil heavy metal contamination on microorganisms and the impact of different heavy metal pollution levels on the microbial interactions.MethodsWe collected soil samples and determined soil properties. Microbial diversity was analyzed in two groups of samples using high-throughput sequencing technology. Additionally, we constructed microbial networks to analyze microbial interactions.ResultsThe pollution load index (PLI) < 1 indicates that the area is not polluted. 1 < PLI < 2 represents moderate pollution. PLI was 1.05 and 0.14 for the heavy metal contaminated area and the uncontaminated area, respectively. Cd, Hg, Pb, Zn, and Cu were identified as the major contaminants in the contaminated area, with the contamination factors were 30.35, 11.26, 5.46, 5.19, and 2.46, respectively. The diversities and compositions of the bacterial community varied significantly between the two groups. Compared to the uncontaminated area, the co-occurrence network between bacterial and fungal species in the contaminated area was more complex. The keystone taxa of the co-occurrence network in the contaminated area were more than those in the uncontaminated area and were completely different from it.DiscussionHeavy metal concentrations played a crucial role in shaping the difference in microbial community compositions. Microorganisms adapt to long-term and moderate levels of heavy metal contamination through enhanced interactions. Bacteria resistant to heavy metal concentrations may play an important role in soils contaminated with moderate levels of heavy metals over long periods of time.

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Section: Discussion the Response Of Microbial Communities To Heavy M...mentioning

confidence: 48%

Bacterial–fungal interactions and response to heavy metal contamination of soil in agricultural areas

Li,

Zheng,

Liu

et al. 2024

Front. Microbiol.

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“…The majority of examined soil physicochemical properties did not differ between the prescribed burn-treated plot and the unburned control plot. The lack of differences in soil properties could explain why we did not detect alteration of the bulk soil microbial communities following prescribed burn treatment, given the well-documented role of soil physicochemical properties in structuring microbial communities ( Parfrey, Moreau & Russell, 2018 ; Glassman, Wang & Bruns, 2017 ; Onufrak, Rúa & Hossler, 2020 ; Pulido-Chavez et al, 2021 ). Most notably, SOM did not differ between the unburned control and prescribed burn-treated plots.…”

Section: Discussionmentioning

confidence: 87%

Signatures of prescribed fire in the microbial communities of Cornus florida are largely undetectable five months post-fire

Kapoor,

Onufrak,

Klingeman III

et al. 2023

PeerJ

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Prescribed burn is a management tool that influences the physical structure and composition of forest plant communities and their associated microorganisms. Plant-associated microorganisms aid in host plant disease tolerance and increase nutrient availability. The effects of prescribed burn on microorganisms associated with native ecologically and economically important tree species, such as Cornus florida L. (flowering dogwood), are not well understood, particularly in aboveground plant tissues (e.g., leaf, stem, and bark tissues). The objective of this study was to use 16S rRNA gene and ITS2 region sequencing to evaluate changes in bacterial and fungal communities of five different flowering dogwood-associated niches (soil, roots, bark, stem, and leaves) five months following a prescribed burn treatment. The alpha- and beta-diversity of root bacterial/archaeal communities differed significantly between prescribed burn and unburned control-treated trees. In these bacterial/archaeal root communities, we also detected a significantly higher relative abundance of sequences identified as Acidothermaceae, a family of thermophilic bacteria. No significant differences were detected between prescribed burn-treated and unburned control trees in bulk soils or bark, stem, or leaf tissues. The findings of our study suggest that prescribed burn does not significantly alter the aboveground plant-associated microbial communities of flowering dogwood trees five months following the prescribed burn application. Further studies are required to better understand the short- and long-term effects of prescribed burns on the microbial communities of forest trees.

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“…These results likely reflect a strong influence of host filtering on microbial colonization into their root tissues. These results also suggest that bacteria play a more prominent role in mediating S. americanus responses to salinity stress than fungi, perhaps because wetland soils present anoxic and reducing conditions that are biogeochemically hostile to fungal communities (Onufrak et al, 2020). Culture-based studies have, however,…”

Section: Endosphere Microbial Associates Of S Americanusmentioning

confidence: 94%

Microbial mediation of salinity stress response varies by plant genotype and provenance over time

et al. 2022

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Although it is becoming widely appreciated that microbes can enhance plant tolerance to environmental stress, the nature of microbial mediation of exposure responses is not well understood. We addressed this deficit by examining whether microbial mediation of plant responses to elevated salinity is contingent on the environment and factors intrinsic to the host. We evaluated the influence of contrasting environmental conditions relative to host genotype, provenance and evolution by conducting a common‐garden experiment utilizing ancestral and descendant cohorts of Schoenoplectus americanus genotypes recovered from two 100+ year coastal marsh seed banks. We compared S. americanus productivity and trait variation as well as associated endophytic microbial communities according to plant genotype, provenance, and age cohort under high and low salinity stress with and without native soil inoculation. The magnitude and direction of microbial mediation of S. americanus responses to elevated salinity varied according to individual genotype, provenance, as well as temporal shifts in genotypic variation and G × E (gene by environment) interactions. Relationships differed between plant traits and the structure of endosphere communities. Our findings indicate that plant‐microbe associations and microbial mediation of plant stress are not only context‐dependent but also dynamic. Our results additionally suggest that evolution can shape the fate of marsh ecosystems by altering how microbes confer plant tolerance to pressures linked to global change.

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The Missing Metric: An Evaluation of Fungal Importance in Wetland Assessments

Cited by 14 publications

References 46 publications

Bacterial–fungal interactions and response to heavy metal contamination of soil in agricultural areas

Bacterial–fungal interactions and response to heavy metal contamination of soil in agricultural areas

Signatures of prescribed fire in the microbial communities of Cornus florida are largely undetectable five months post-fire

Microbial mediation of salinity stress response varies by plant genotype and provenance over time

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