The Relationships Between the Free-Living and Particle-Attached Bacterial Communities in Response to Elevated Eutrophication

Hu, Yang; Xie, Guobo; Jiang, Xingyu; Shao, Kwang‐Tsao; Tang, Xiangming; Gao, Guang

doi:10.3389/fmicb.2020.00423

Cited by 36 publications

(31 citation statements)

References 62 publications

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“…Acute lung injury, mediated by gut microbiota, was associated with a shift in the microbial community in the lung, showing a co-relation between gut and lung 55 . These strains exhibit anti-tumor or immunomodulating activities, and some of them have also shown inhibitory effects on viruses 56 .…”

Section: Benefits Of the Microbiotamentioning

confidence: 99%

Microbiota and their Influence in the Human Body

Al-Judaibi¹

2021

J Pure Appl Microbiol

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Scientists have invested considerable resources in the study of the microbiota of the human body. These microorganisms play pivotal roles in immunity and disease. Of which, probiotics are live beneficial microorganisms that keep your intestinal or lung microbiota healthy, and occupy a special role in combating the infections. Thus, it is critical to understand their contributions to these processes. Technology can facilitate advanced studies of the microbiota, including how it develops and its positive and negatives effects on the immune system. This paper investigates how several factors (e.g. birth delivery mode, metabolic activities, types of microorganisms, and immune system interactions) affect the microbiota, particularly in early life. The paper also discusses how gastrointestinal microbes in particular may be associated with certain disease processes, such as those related to schizophrenia, autism, and diabetes. Clinical studies show that certain probiotic strains, like Lactobacillus rhamnosus GG and Bifidobacterium animalis ssp. lactis help to prevent infection of pathogenic organisms (both bacterial and viral). This research may yield crucial contributions to disease prevention and public health. The dysbiosis may result in changes in the acquired immunity later on. The probiotic strains can prevent viral replication during SARS-CoV-2 or COVID-19 infection by reducing proinflammatory cytokines. There has been much interest into the intestinal flora as proposed by the diversity, volume, and proposed role in disease. Future research in the field of microbiome should be done in order to uncover their association to gut virome by noting both their influence on each other and relevant health and disease.

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Section: Benefits Of the Microbiotamentioning

confidence: 99%

Microbiota and their Influence in the Human Body

Al-Judaibi¹

2021

J Pure Appl Microbiol

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“…Based on recent studies on microbial interactions in plankton, Grossart (2010) proposed the concept of an intertwined microbial network between free-living and surface-attached (particle-associated) bacteria, where surface associated bacteria may play a considerable role for nutrient cycling and biomass production. Later studies of free-living and particle-associated bacteria revealed that the connectivity between these communities increased along nutrient gradients ( Hu et al, 2020 ). Also, it was shown that interactions in particle-associated community are stronger, than in free-living ( Zhang et al, 2016 ; Hu et al, 2020 ).…”

Section: Interactions Between Auto- and Heterotrophs In Aquatic Micromentioning

confidence: 99%

“…Later studies of free-living and particle-associated bacteria revealed that the connectivity between these communities increased along nutrient gradients ( Hu et al, 2020 ). Also, it was shown that interactions in particle-associated community are stronger, than in free-living ( Zhang et al, 2016 ; Hu et al, 2020 ). Microbial interactions mediated by chemical substances, e.g., allelopathy, seem to be a widespread strategy in both planktonic and benthic communities ( Leflaive and Ten-Hage, 2007 , 2009 ).…”

Section: Interactions Between Auto- and Heterotrophs In Aquatic Micromentioning

confidence: 99%

New Methods, New Concepts: What Can Be Applied to Freshwater Periphyton?

Gubelit

Grossart

2020

Front. Microbiol.

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Microbial interactions play an essential role in aquatic ecosystems and are of the great interest for both marine and freshwater ecologists. Recent development of new technologies and methods allowed to reveal many functional mechanisms and create new concepts. Yet, many fundamental aspects of microbial interactions have been almost exclusively studied for marine pelagic and benthic ecosystems. These studies resulted in a formulation of the Black Queen Hypothesis, a development of the phycosphere concept for pelagic communities, and a realization of microbial communication as a key mechanism for microbial interactions. In freshwater ecosystems, especially for periphyton communities, studies focus mainly on physiology, biodiversity, biological indication, and assessment, but the many aspects of microbial interactions are neglected to a large extent. Since periphyton plays a great role for aquatic nutrient cycling, provides the basis for water purification, and can be regarded as a hotspot of microbial biodiversity, we highlight that more in-depth studies on microbial interactions in periphyton are needed to improve our understanding on functioning of freshwater ecosystems. In this paper we first present an overview on recent concepts (e.g., the "Black Queen Hypothesis") derived from state-of-the-art OMICS methods including metagenomics, metatranscriptomics, and metabolomics. We then point to the avenues how these methods can be applied for future studies on biodiversity and the ecological role of freshwater periphyton, a yet largely neglected component of many freshwater ecosystems.

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“…The transfer of organic carbon from phytoplankton to bacteria may occur through two different routes: via the DOC released by phytoplankton into the surrounding water and its uptake by free-living bacteria, and through bacteria that are physically attached to the phytoplankton taking up the DOC directly from phytoplankton cells (Grossart and Simon, 2007;Mével et al, 2008). Although some recent studies have demonstrated that communities of free-living and attached bacteria were only slightly different, they have generally been considered to have many distinct characteristics (Hu et al, 2020). Compared with free-living cells, attached bacteria generally have stronger capability for involvement in biofilm development, having higher extracellular enzymatic activity and stronger chemotactic behavior (Tout et al, 2015;Dang and Lovell, 2016).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

et al. 2021

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In the context of global warming, changes in phytoplankton-associated bacterial communities have the potential to change biogeochemical cycling and food webs in marine ecosystems. Skeletonema is a cosmopolitan diatom genus in coastal waters worldwide. Here, we grew a Skeletonema strain with its native bacterial assemblage at different temperatures and examined cell concentrations of Skeletonema sp. and free-living bacteria, dissolved organic carbon (DOC) concentrations of cultures, and the community structure of both free-living and attached bacteria at different culture stages. The results showed that elevated temperature increased the specific growth rates of both Skeletonema and free-living bacteria. Different growth stages had a more pronounced effect on community structure compared with temperatures and different physical states of bacteria. The effects of temperature on the structure of the free-living bacterial community were more pronounced compared with diatom-attached bacteria. Carbon metabolism genes and those for some specific amino acid pathways were found to be positively correlated with elevated temperature, which may have profound implications on the oceanic carbon cycle and the marine microbial loop. Network analysis revealed evidence of enhanced cooperation with an increase in positive interactions among different bacteria at elevated temperature. This may help the whole community to overcome the stress of elevated temperature. We speculate that different bacterial species may build more integrated networks with a modified functional profile of the whole community to cope with elevated temperature. This study contributes to an improved understanding of the response of diatom-associated bacterial communities to elevated temperature.

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The Relationships Between the Free-Living and Particle-Attached Bacterial Communities in Response to Elevated Eutrophication

Cited by 36 publications

References 62 publications

Microbiota and their Influence in the Human Body

Microbiota and their Influence in the Human Body

New Methods, New Concepts: What Can Be Applied to Freshwater Periphyton?

Dynamics of Free-Living and Attached Bacterial Assemblages in Skeletonema sp. Diatom Cultures at Elevated Temperatures

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