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Cruz FVDS, Barbosa da Costa N, Juneau P. Non-pathogenic microbiome associated to aquatic plants and anthropogenic impacts on this interaction. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174663. [PMID: 38992379 DOI: 10.1016/j.scitotenv.2024.174663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 06/22/2024] [Accepted: 07/07/2024] [Indexed: 07/13/2024]
Abstract
The microbiota associated with aquatic plants plays a crucial role in promoting plant growth and development. The structure of the plant microbiome is shaped by intricate interactions among hosts, microbes, and environmental factors. Consequently, anthropogenic pressures that disrupt these interactions can indirectly impact the ecosystem services provided by aquatic plants, such as CO2 fixation, provision of food resources, shelter to animals, nutrient cycling, and water purification. Presently, studies on plant-microbiota interactions primarily focus on terrestrial hosts and overlook aquatic environments with their unique microbiomes. Therefore, there is a pressing need for a comprehensive understanding of plant microbiomes in aquatic ecosystems. This review delves into the overall composition of the microbiota associated with aquatic plant, with a particular emphasis on bacterial communities, which have been more extensively studied. Subsequently, the functions provided by the microbiota to their aquatic plants hosts are explored, including the acquisition and mobilization of nutrients, production of auxin and related compounds, enhancement of photosynthesis, and protection against biotic and abiotic stresses. Additionally, the influence of anthropogenic stressors, such as climate change and aquatic contamination, on the interaction between microbiota and aquatic plants is discussed. Finally, knowledge gaps are highlighted and future directions in this field are suggested.
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Affiliation(s)
- Fernanda Vieira da Silva Cruz
- Ecotoxicology of Aquatic Microorganisms Laboratory, GRIL, EcotoQ, TOXEN, Department of Biological Sciences, Université du Québec à Montréal, Montréal Succ. Centre-Ville, H3C 3P8 Montréal, QC, Canada
| | - Naíla Barbosa da Costa
- Institut national de la recherche scientifique - Centre Eau Terre Environnement, 490 Couronne St, Québec City, Québec G1K 9A9, Canada
| | - Philippe Juneau
- Ecotoxicology of Aquatic Microorganisms Laboratory, GRIL, EcotoQ, TOXEN, Department of Biological Sciences, Université du Québec à Montréal, Montréal Succ. Centre-Ville, H3C 3P8 Montréal, QC, Canada.
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Papazachariou V, Fernández-Juárez V, Parfrey LW, Riemann L. Nitrogen Fixation and Microbial Communities Associated with Decomposing Seagrass Leaves in Temperate Coastal Waters. MICROBIAL ECOLOGY 2024; 87:106. [PMID: 39141097 PMCID: PMC11324715 DOI: 10.1007/s00248-024-02424-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 08/05/2024] [Indexed: 08/15/2024]
Abstract
Seagrass meadows play pivotal roles in coastal biochemical cycles, with nitrogen fixation being a well-established process associated with living seagrass. Here, we tested the hypothesis that nitrogen fixation is also associated with seagrass debris in Danish coastal waters. We conducted a 52-day in situ experiment to investigate nitrogen fixation (proxied by acetylene reduction) and dynamics of the microbial community (16S rRNA gene amplicon sequencing) and the nitrogen fixing community (nifH DNA/RNA amplicon sequencing) associated with decomposing Zostera marina leaves. The leaves harboured distinct microbial communities, including distinct nitrogen fixers, relative to the surrounding seawater and sediment throughout the experiment. Nitrogen fixation rates were measurable on most days, but highest on days 3 (dark, 334.8 nmol N g-1 dw h-1) and 15 (light, 194.6 nmol N g-1 dw h-1). Nitrogen fixation rates were not correlated with the concentration of inorganic nutrients in the surrounding seawater or with carbon:nitrogen ratios in the leaves. The composition of nitrogen fixers shifted from cyanobacterial Sphaerospermopsis to heterotrophic genera like Desulfopila over the decomposition period. On the days with highest fixation, nifH RNA gene transcripts were mainly accounted for by cyanobacteria, in particular by Sphaerospermopsis and an unknown taxon (order Nostocales), alongside Proteobacteria. Our study shows that seagrass debris in temperate coastal waters harbours substantial nitrogen fixation carried out by cyanobacteria and heterotrophic bacteria that are distinct relative to the surrounding seawater and sediments. This suggests that seagrass debris constitutes a selective environment where degradation is affected by the import of nitrogen via nitrogen fixation.
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Affiliation(s)
- Vasiliki Papazachariou
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
- Center for Volatile Interactions, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Victor Fernández-Juárez
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark
| | - Laura Wegener Parfrey
- Biodiversity Research Centre, Department of Botany, and Department of Zoology, University of British Columbia, Vancouver, Canada
| | - Lasse Riemann
- Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark.
- Center for Volatile Interactions, Department of Biology, University of Copenhagen, Copenhagen, Denmark.
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Deng W, Chen S, Chen S, Xing B, Chan Z, Zhang Y, Chen B, Chen G. Impacts of eutrophication on microbial community structure in sediment, seawater, and phyllosphere of seagrass ecosystems. Front Microbiol 2024; 15:1449545. [PMID: 39206368 PMCID: PMC11350616 DOI: 10.3389/fmicb.2024.1449545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Accepted: 07/29/2024] [Indexed: 09/04/2024] Open
Abstract
Introduction Seagrass-associated microbial communities play a crucial role in the growth and health of seagrasses. However, like seagrass meadows, seagrass-associated microbial communities are often affected by eutrophication. It remains unclear how eutrophication influences the composition and function of microbial communities associated with different parts of seagrass. Methods We employed prokaryotic 16S rRNA gene high-throughput sequencing combining microbial community structure analysis and co-occurrence network analysis to investigate variances in microbial community compositions, potential functions and complexities across sediment, seagrass leaves, and seawater within different eutrophic areas of two adjacent seagrass meadows on Hainan Island, China. Results Our results indicated that microbial diversity on seagrass leaves was significantly lower than in sediment but significantly higher than in seawater. Both sediment and phyllosphere microbial diversity showed no significant difference between the highly eutrophic and less eutrophic sites in each lagoon. However, sediment microbial diversity was higher in the more eutrophic lagoon, while phyllosphere microbial diversity was higher in the less eutrophic lagoon. Heavy eutrophication increased the relative abundance of phyllosphere microorganisms potentially involved in anaerobic metabolic processes, while reducing those responsible for beneficial functions like denitrification. The main factor affecting microbial diversity was organic carbon in seawater and sediment, with high organic carbon levels leading to decreased microbial diversity. The co-occurrence network analysis revealed that heavy eutrophication notably reduced the complexity and internal connections of the phyllosphere microbial community in comparison to the sediment and seawater microbial communities. Furthermore, ternary analysis demonstrated that heavy eutrophication diminished the external connections of the phyllosphere microbial community with the sediment and seawater microbial communities. Conclusion The pronounced decrease in biodiversity and complexity of the phyllosphere microbial community under eutrophic conditions can lead to greater microbial functional loss, exacerbating seagrass decline. This study emphasizes the significance of phyllosphere microbial communities compared to sediment microbial communities in the conservation and restoration of seagrass meadows under eutrophic conditions.
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Affiliation(s)
- Wenchao Deng
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
| | - Shunyang Chen
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
- Key Laboratory of Marine Ecological Conservation and Restoration, Ministry of Natural Resources, Xiamen, China
| | - Shiquan Chen
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, China
| | - Bingpeng Xing
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
| | - Zhuhua Chan
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
| | - Yao Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Bin Chen
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
- Key Laboratory of Marine Ecological Conservation and Restoration, Ministry of Natural Resources, Xiamen, China
| | - Guangcheng Chen
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China
- Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf, Ministry of Natural Resources, Beihai, China
- Key Laboratory of Marine Ecological Conservation and Restoration, Ministry of Natural Resources, Xiamen, China
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Thomas G, Kay WT, Fones HN. Life on a leaf: the epiphyte to pathogen continuum and interplay in the phyllosphere. BMC Biol 2024; 22:168. [PMID: 39113027 PMCID: PMC11304629 DOI: 10.1186/s12915-024-01967-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 08/01/2024] [Indexed: 08/11/2024] Open
Abstract
Epiphytic microbes are those that live for some or all of their life cycle on the surface of plant leaves. Leaf surfaces are a topologically complex, physicochemically heterogeneous habitat that is home to extensive, mixed communities of resident and transient inhabitants from all three domains of life. In this review, we discuss the origins of leaf surface microbes and how different biotic and abiotic factors shape their communities. We discuss the leaf surface as a habitat and microbial adaptations which allow some species to thrive there, with particular emphasis on microbes that occupy the continuum between epiphytic specialists and phytopathogens, groups which have considerable overlap in terms of adapting to the leaf surface and between which a single virulence determinant can move a microbial strain. Finally, we discuss the recent findings that the wheat pathogenic fungus Zymoseptoria tritici spends a considerable amount of time on the leaf surface, and ask what insights other epiphytic organisms might provide into this pathogen, as well as how Z. tritici might serve as a model system for investigating plant-microbe-microbe interactions on the leaf surface.
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Affiliation(s)
| | - William T Kay
- Department of Plant Sciences, University of Oxford, Oxford, UK
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Di Gregorio S, Niccolini L, Seggiani M, Strangis G, Barbani N, Vitiello V, Becarelli S, Petroni G, Yan X, Buttino I. Marine copepod culture as a potential source of bioplastic-degrading microbiome: The case of poly(butylene succinate-co-adipate). CHEMOSPHERE 2024; 362:142603. [PMID: 38885765 DOI: 10.1016/j.chemosphere.2024.142603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 05/21/2024] [Accepted: 06/11/2024] [Indexed: 06/20/2024]
Abstract
The poly(butylene succinate-co-adipate) (PBSA) is emerging as environmentally sustainable polyester for applications in marine environment. In this work the capacity of microbiome associated with marine plankton culture to degrade PBSA, was tested. A taxonomic and functional characterization of the microbiome associated with the copepod Acartia tonsa, reared in controlled conditions, was analysed by 16S rDNA metabarcoding, in newly-formed adult stages and after 7 d of incubation. A predictive functional metagenomic profile was inferred for hydrolytic activities involved in bioplastic degradation with a particular focus on PBSA. The copepod-microbiome was also characterized in newly-formed carcasses of A. tonsa, and after 7 and 33 d of incubation in the plankton culture medium. Copepod-microbiome showed hydrolytic activities at all developmental stages of the alive copepods and their carcasses, however, the evenness of the hydrolytic bacterial community significantly increased with the time of incubation in carcasses. Microbial genera, never described in association with copepods: Devosia, Kordia, Lentibacter, Methylotenera, Rheinheimera, Marinagarivorans, Paraglaciecola, Pseudophaeobacter, Gaiella, Streptomyces and Kribbella sps., were retrieved. Kribbella sp. showed carboxylesterase activity and Streptomyces sp. showed carboxylesterase, triacylglycerol lipase and cutinase activities, that might be involved in PBSA degradation. A culturomic approach, adopted to isolate bacterial specimen from carcasses, led to the isolation of the bacterial strain, Vibrio sp. 01 tested for the capacity to promote the hydrolysis of the ester bonds. Granules of PBSA, incubated 82 d at 20 °C with Vibrio sp. 01, were characterized by scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry, showing fractures compared to the control sample, and hydrolysis of ester bonds. These preliminary results are encouraging for further investigation on the ability of the microbiome associated with plankton to biodegrade polyesters, such as PBSA, and increasing knowledge on microorganisms involved in bioplastic degradation in marine environment.
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Affiliation(s)
- Simona Di Gregorio
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - Luca Niccolini
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy; Functional Biology and Plankton Genomic Lab. ISPRA - Italian Institute for Environmental Protection and Research, Via del Cedro n.38, 57122, Livorno, Italy
| | - Maurizia Seggiani
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 1, 56122, Pisa, Italy
| | - Giovanna Strangis
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 1, 56122, Pisa, Italy
| | - Niccoletta Barbani
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino 1, 56122, Pisa, Italy
| | - Valentina Vitiello
- Functional Biology and Plankton Genomic Lab. ISPRA - Italian Institute for Environmental Protection and Research, Via del Cedro n.38, 57122, Livorno, Italy; Sino-Italian Joint Laboratory Functional Biology of Marine Biota, ISPRA, 57122, Livorno, Italy
| | - Simone Becarelli
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - Giulio Petroni
- Department of Biology, University of Pisa, Via Luca Ghini 13, 56123, Pisa, Italy
| | - Xiaojun Yan
- Sino-Italian Joint Laboratory Functional Biology of Marine Biota, ISPRA, 57122, Livorno, Italy; Laboratory of Marine Biological Resources and Molecular Engineering, Marine Science and Technical College, Zhejiang Ocean University, Zhoushan City, 316022, Zhejiang, China
| | - Isabella Buttino
- Functional Biology and Plankton Genomic Lab. ISPRA - Italian Institute for Environmental Protection and Research, Via del Cedro n.38, 57122, Livorno, Italy; Sino-Italian Joint Laboratory Functional Biology of Marine Biota, ISPRA, 57122, Livorno, Italy.
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Girão M, Alexandrino DAM, Cao W, Costa I, Jia Z, Carvalho MF. Unveiling the culturable and non-culturable actinobacterial diversity in two macroalgae species from the northern Portuguese coast. Environ Microbiol 2024; 26:e16620. [PMID: 38627038 DOI: 10.1111/1462-2920.16620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/16/2024] [Indexed: 04/19/2024]
Abstract
Actinomycetota, associated with macroalgae, remains one of the least explored marine niches. The secondary metabolism of Actinomycetota, the primary microbial source of compounds relevant to biotechnology, continues to drive research into the distribution, dynamics, and metabolome of these microorganisms. In this study, we employed a combination of traditional cultivation and metagenomic analysis to investigate the diversity of Actinomycetota in two native macroalgae species from the Portuguese coast. We obtained and taxonomically identified a collection of 380 strains, which were distributed across 12 orders, 15 families, and 25 genera affiliated with the Actinomycetia class, with Streptomyces making up approximately 60% of the composition. Metagenomic results revealed the presence of Actinomycetota in both Chondrus crispus and Codium tomentosum datasets, with relative abundances of 11% and 2%, respectively. This approach identified 12 orders, 16 families, and 17 genera affiliated with Actinomycetota, with minimal overlap with the cultivation results. Acidimicrobiales emerged as the dominant actinobacterial order in both macroalgae, although no strain affiliated with this taxonomic group was successfully isolated. Our findings suggest that macroalgae represent a hotspot for Actinomycetota. The synergistic use of both culture-dependent and independent approaches proved beneficial, enabling the identification and recovery of not only abundant but also rare taxonomic members.
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Affiliation(s)
- Mariana Girão
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
| | - Diogo A M Alexandrino
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- Department of Environmental Health, School of Health, Porto, Portugal
| | - Weiwei Cao
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Isabel Costa
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Zhongjun Jia
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Maria F Carvalho
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
- ICBAS-School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
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7
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Berlinghof J, Montilla LM, Peiffer F, Quero GM, Marzocchi U, Meador TB, Margiotta F, Abagnale M, Wild C, Cardini U. Accelerated nitrogen cycling on Mediterranean seagrass leaves at volcanic CO 2 vents. Commun Biol 2024; 7:341. [PMID: 38503855 PMCID: PMC11254932 DOI: 10.1038/s42003-024-06011-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 03/05/2024] [Indexed: 03/21/2024] Open
Abstract
Seagrass meadows form highly productive and diverse ecosystems in coastal areas worldwide, where they are increasingly exposed to ocean acidification (OA). Efficient nitrogen (N) cycling and uptake are essential to maintain plant productivity, but the effects of OA on N transformations in these systems are poorly understood. Here we show that complete N cycling occurs on leaves of the Mediterranean seagrass Posidonia oceanica at a volcanic CO2 vent near Ischia Island (Italy), with OA affecting both N gain and loss while the epiphytic microbial community structure remains largely unaffected. Daily leaf-associated N2 fixation contributes to 35% of the plant's N demand under ambient pH, while it contributes to 45% under OA. Nitrification potential is only detected under OA, and N-loss via N2 production increases, although the balance remains decisively in favor of enhanced N gain. Our work highlights the role of the N-cycling microbiome in seagrass adaptation to OA, with key N transformations accelerating towards increased N gain.
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Affiliation(s)
- Johanna Berlinghof
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy.
- Department of Marine Ecology, University of Bremen, Bremen, Germany.
- Genoa Marine Centre, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Genova, Italy.
| | - Luis M Montilla
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy
| | - Friederike Peiffer
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy
- Department of Marine Ecology, University of Bremen, Bremen, Germany
| | - Grazia M Quero
- Institute for Marine Biological Resources and Biotechnology, National Research Council (CNR), Ancona, Italy
| | - Ugo Marzocchi
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy
- Center for water technology (WATEC), Department of Biology, Aarhus University, Aarhus, Denmark
| | - Travis B Meador
- Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
- Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Francesca Margiotta
- Department of Research Infrastructures for marine biological resources, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy
| | - Maria Abagnale
- Department of Research Infrastructures for marine biological resources, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy
| | - Christian Wild
- Department of Marine Ecology, University of Bremen, Bremen, Germany
| | - Ulisse Cardini
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy.
- Genoa Marine Centre, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Genova, Italy.
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8
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Graham OJ, Adamczyk EM, Schenk S, Dawkins P, Burke S, Chei E, Cisz K, Dayal S, Elstner J, Hausner ALP, Hughes T, Manglani O, McDonald M, Mikles C, Poslednik A, Vinton A, Wegener Parfrey L, Harvell CD. Manipulation of the seagrass-associated microbiome reduces disease severity. Environ Microbiol 2024; 26:e16582. [PMID: 38195072 DOI: 10.1111/1462-2920.16582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/27/2023] [Indexed: 01/11/2024]
Abstract
Host-associated microbes influence host health and function and can be a first line of defence against infections. While research increasingly shows that terrestrial plant microbiomes contribute to bacterial, fungal, and oomycete disease resistance, no comparable experimental work has investigated marine plant microbiomes or more diverse disease agents. We test the hypothesis that the eelgrass (Zostera marina) leaf microbiome increases resistance to seagrass wasting disease. From field eelgrass with paired diseased and asymptomatic tissue, 16S rRNA gene amplicon sequencing revealed that bacterial composition and richness varied markedly between diseased and asymptomatic tissue in one of the two years. This suggests that the influence of disease on eelgrass microbial communities may vary with environmental conditions. We next experimentally reduced the eelgrass microbiome with antibiotics and bleach, then inoculated plants with Labyrinthula zosterae, the causative agent of wasting disease. We detected significantly higher disease severity in eelgrass with a native microbiome than an experimentally reduced microbiome. Our results over multiple experiments do not support a protective role of the eelgrass microbiome against L. zosterae. Further studies of these marine host-microbe-pathogen relationships may continue to show new relationships between plant microbiomes and diseases.
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Affiliation(s)
- Olivia J Graham
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Emily M Adamczyk
- Department of Zoology and Biodiversity Research Centre, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, University of British Columbia, Vancouver, British Columbia, Canada
| | - Siobhan Schenk
- Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada
| | - Phoebe Dawkins
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Samantha Burke
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Emily Chei
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Kaitlyn Cisz
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Sukanya Dayal
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Jack Elstner
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | | | - Taylor Hughes
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Omisha Manglani
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Miles McDonald
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Chloe Mikles
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Anna Poslednik
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Audrey Vinton
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Laura Wegener Parfrey
- Department of Zoology and Biodiversity Research Centre, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada
| | - C Drew Harvell
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
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9
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Tasdemir D, Scarpato S, Utermann-Thüsing C, Jensen T, Blümel M, Wenzel-Storjohann A, Welsch C, Echelmeyer VA. Epiphytic and endophytic microbiome of the seagrass Zostera marina: Do they contribute to pathogen reduction in seawater? THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168422. [PMID: 37956849 DOI: 10.1016/j.scitotenv.2023.168422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/27/2023] [Accepted: 11/06/2023] [Indexed: 11/15/2023]
Abstract
Seagrass meadows provide crucial ecosystem services for coastal environments and were shown to reduce the abundance of waterborne pathogens linked to infections in humans and marine organisms in their vicinity. Among potential drivers, seagrass phenolics released into seawater have been linked to pathogen suppression, but the potential involvement of the seagrass microbiome has not been investigated. We hypothesized that the microbiome of the eelgrass Zostera marina, especially the leaf epiphytes that are at direct interface between the seagrass host and the surrounding seawater, inhibit waterborne pathogens thereby contributing to their removal. Using a culture-dependent approach, we isolated 88 bacteria and fungi associated with the surfaces and inner tissues of the eelgrass leaves (healthy and decaying) and the roots. We assessed the antibiotic activity of microbial extracts against a large panel of common aquatic, human (fecal) and plant pathogens, and mined the metabolome of the most active extracts. The healthy leaf epibiotic bacteria, particularly Streptomyces sp. strain 131, displayed broad-spectrum antibiotic activity superior to some control drugs. Gram-negative bacteria abundant on healthy leaf surfaces, and few endosphere-associated bacteria and fungi also displayed remarkable activities. UPLC-MS/MS-based untargeted metabolomics analyses showed rich specialized metabolite repertoires with low annotation rates, indicating the presence of many undescribed antimicrobials in the extracts. This study contributes to our understanding on microbial and chemical ecology of seagrasses, implying potential involvement of the seagrass microbiome in suppression of pathogens in seawater. Such effect is beneficial for the health of ocean and human, especially in the context of climate change that is expected to exacerbate all infectious diseases. It may also assist future seagrass conservation and management strategies.
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Affiliation(s)
- Deniz Tasdemir
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany; Faculty of Mathematics and Natural Sciences, Kiel University, Kiel 24118, Germany.
| | - Silvia Scarpato
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Caroline Utermann-Thüsing
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Timo Jensen
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Martina Blümel
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Arlette Wenzel-Storjohann
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Claudia Welsch
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
| | - Vivien Anne Echelmeyer
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel 24106, Germany
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10
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Park J, Davis K, Lajoie G, Parfrey LW. Alternative approaches to identify core bacteria in Fucus distichus microbiome and assess their distribution and host-specificity. ENVIRONMENTAL MICROBIOME 2022; 17:55. [PMID: 36384808 PMCID: PMC9670562 DOI: 10.1186/s40793-022-00451-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Identifying meaningful ecological associations between host and components of the microbiome is challenging. This is especially true for hosts such as marine macroalgae where the taxonomic composition of the microbiome is highly diverse and variable in space and time. Identifying core taxa is one way forward but there are many methods and thresholds in use. This study leverages a large dataset of microbial communities associated with the widespread brown macroalga, Fucus distichus, across sites and years on one island in British Columbia, Canada. We compare three different methodological approaches to identify core taxa at the amplicon sequence variant (ASV) level from this dataset: (1) frequency analysis of taxa on F. distichus performed over the whole dataset, (2) indicator species analysis (IndVal) over the whole dataset that identifies frequent taxa that are enriched on F. distichus in comparison to the local environment, and (3) a two-step IndVal method that identifies taxa that are consistently enriched on F. distichus across sites and time points. We then investigated a F. distichus time-series dataset to see if those core taxa are seasonally consistent on another remote island in British Columbia, Canada. We then evaluate host-specificity of the identified F. distichus core ASVs using comparative data from 32 other macroalgal species sampled at one of the sites. RESULTS We show that a handful of core ASVs are consistently identified by both frequency analysis and IndVal approaches with alternative definitions, although no ASVs were always present on F. distichus and IndVal identified a diverse array of F. distichus indicator taxa across sites on Calvert Island in multiple years. Frequency analysis captured a broader suit of taxa, while IndVal was better at identifying host-specific microbes. Finally, two-step IndVal identified hundreds of indicator ASVs for particular sites/timepoints but only 12 that were indicators in a majority (> 6 out of 11) of sites/timepoints. Ten of these ASVs were also indicators on Quadra Island, 250 km away. Many F. distichus-core ASVs are generally found on multiple macroalgal species, while a few ASVs are highly specific to F. distichus. CONCLUSIONS Different methodological approaches with variable set thresholds influence core identification, but a handful of core taxa are apparently identifiable as they are widespread and temporally associated with F. distichus and enriched in comparison to the environment. Moreover, we show that many of these core ASVs of F. distichus are found on multiple macroalgal hosts, indicating that most occupy a macroalgal generalist niche rather than forming highly specialized associations with F. distichus. Further studies should test whether macroalgal generalists or specialists are more likely to engage in biologically important exchanges with host.
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Affiliation(s)
- Jungsoo Park
- Department of Botany, Biodiversity Research Centre, University of British Columbia, Vancouver, BC Canada
| | - Katherine Davis
- Department of Botany, Biodiversity Research Centre, University of British Columbia, Vancouver, BC Canada
| | - Geneviève Lajoie
- Department of Botany, Biodiversity Research Centre, University of British Columbia, Vancouver, BC Canada
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, Montréal, QC Canada
| | - Laura Wegener Parfrey
- Department of Botany, Biodiversity Research Centre, University of British Columbia, Vancouver, BC Canada
- Department of Zoology, University of British Columbia, Vancouver, BC Canada
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11
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Beatty DS, Aoki LR, Rappazzo B, Bergman C, Domke LK, Duffy JE, Dubois K, Eckert GL, Gomes C, Graham OJ, Harper L, Harvell CD, Hawthorne TL, Hessing-Lewis M, Hovel K, Monteith ZL, Mueller RS, Olson AM, Prentice C, Tomas F, Yang B, Stachowicz JJ. Predictable Changes in Eelgrass Microbiomes with Increasing Wasting Disease Prevalence across 23° Latitude in the Northeastern Pacific. mSystems 2022; 7:e0022422. [PMID: 35856664 PMCID: PMC9426469 DOI: 10.1128/msystems.00224-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/22/2022] [Indexed: 12/04/2022] Open
Abstract
Predicting outcomes of marine disease outbreaks presents a challenge in the face of both global and local stressors. Host-associated microbiomes may play important roles in disease dynamics but remain understudied in marine ecosystems. Host-pathogen-microbiome interactions can vary across host ranges, gradients of disease, and temperature; studying these relationships may aid our ability to forecast disease dynamics. Eelgrass, Zostera marina, is impacted by outbreaks of wasting disease caused by the opportunistic pathogen Labyrinthula zosterae. We investigated how Z. marina phyllosphere microbial communities vary with rising wasting disease lesion prevalence and severity relative to plant and meadow characteristics like shoot density, longest leaf length, and temperature across 23° latitude in the Northeastern Pacific. We detected effects of geography (11%) and smaller, but distinct, effects of temperature (30-day max sea surface temperature, 4%) and disease (lesion prevalence, 3%) on microbiome composition. Declines in alpha diversity on asymptomatic tissue occurred with rising wasting disease prevalence within meadows. However, no change in microbiome variability (dispersion) was detected between asymptomatic and symptomatic tissues. Further, we identified members of Cellvibrionaceae, Colwelliaceae, and Granulosicoccaceae on asymptomatic tissue that are predictive of wasting disease prevalence across the geographic range (3,100 kilometers). Functional roles of Colwelliaceae and Granulosicoccaceae are not known. Cellvibrionaceae, degraders of plant cellulose, were also enriched in lesions and adjacent green tissue relative to nonlesioned leaves. Cellvibrionaceae may play important roles in disease progression by degrading host tissues or overwhelming plant immune responses. Thus, inclusion of microbiomes in wasting disease studies may improve our ability to understand variable rates of infection, disease progression, and plant survival. IMPORTANCE The roles of marine microbiomes in disease remain poorly understood due, in part, to the challenging nature of sampling at appropriate spatiotemporal scales and across natural gradients of disease throughout host ranges. This is especially true for marine vascular plants like eelgrass (Zostera marina) that are vital for ecosystem function and biodiversity but are susceptible to rapid decline and die-off from pathogens like eukaryotic slime-mold Labyrinthula zosterae (wasting disease). We link bacterial members of phyllosphere tissues to the prevalence of wasting disease across the broadest geographic range to date for a marine plant microbiome-disease study (3,100 km). We identify Cellvibrionaceae, plant cell wall degraders, enriched (up to 61% relative abundance) within lesion tissue, which suggests this group may be playing important roles in disease progression. These findings suggest inclusion of microbiomes in marine disease studies will improve our ability to predict ecological outcomes of infection across variable landscapes spanning thousands of kilometers.
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Affiliation(s)
- Deanna S. Beatty
- Department of Evolution and Ecology, University of California, Davis, California, USA
| | - Lillian R. Aoki
- Data Science Initiative, University of Oregon, Eugene, Oregon, USA
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Brendan Rappazzo
- Department of Computer Science, Cornell University, Ithaca, New York, USA
| | - Chelsea Bergman
- Department of Biology and Coastal & Marine Institute, San Diego State University, San Diego, California, USA
| | - Lia K. Domke
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, Alaska, USA
| | - J. Emmett Duffy
- MarineGEO Program and Smithsonian Environmental Research Center, Edgewater, Maryland, USA
| | - Katie Dubois
- Department of Evolution and Ecology, University of California, Davis, California, USA
- Biology Department, Bowdoin College, Brunswick, Maine, USA
| | - Ginny L. Eckert
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, Alaska, USA
| | - Carla Gomes
- Department of Computer Science, Cornell University, Ithaca, New York, USA
| | - Olivia J. Graham
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Leah Harper
- MarineGEO Program and Smithsonian Environmental Research Center, Edgewater, Maryland, USA
| | - C. Drew Harvell
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA
| | - Timothy L. Hawthorne
- Department of Sociology and College of Sciences GIS Cluster, University of Central Florida, Orlando, Florida, USA
| | - Margot Hessing-Lewis
- Nearshore Marine Ecology, Hakai Institute, Heriot Bay, British Columbia, Canada
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kevin Hovel
- Department of Biology and Coastal & Marine Institute, San Diego State University, San Diego, California, USA
| | - Zachary L. Monteith
- Nearshore Marine Ecology, Hakai Institute, Heriot Bay, British Columbia, Canada
| | - Ryan S. Mueller
- Department of Microbiology, Oregon State University, Corvallis, Oregon, USA
| | - Angeleen M. Olson
- Nearshore Marine Ecology, Hakai Institute, Heriot Bay, British Columbia, Canada
| | - Carolyn Prentice
- Nearshore Marine Ecology, Hakai Institute, Heriot Bay, British Columbia, Canada
| | - Fiona Tomas
- Instituto Mediterráneo de Estudios Avanzados (UIB-CSIC), Esporles, Spain
| | - Bo Yang
- Department of Sociology and College of Sciences GIS Cluster, University of Central Florida, Orlando, Florida, USA
- Department of Urban and Regional Planning, San Jose State University, San Jose, California, USA
| | - John J. Stachowicz
- Department of Evolution and Ecology, University of California, Davis, California, USA
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12
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Adamczyk EM, O’Connor MI, Wegener Parfrey L. Seagrass (
Zostera marina
) transplant experiment reveals core microbiome and resistance to environmental change. Mol Ecol 2022; 31:5107-5123. [DOI: 10.1111/mec.16641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 07/20/2022] [Accepted: 07/28/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Emily M. Adamczyk
- Department of Zoology and Biodiversity Research Centre University of British Columbia, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, 4200 ‐ 600 University Blvd Vancouver British Columbia Canada
| | - Mary I. O’Connor
- Department of Zoology and Biodiversity Research Centre University of British Columbia, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, 4200 ‐ 600 University Blvd Vancouver British Columbia Canada
| | - Laura Wegener Parfrey
- Department of Zoology and Biodiversity Research Centre University of British Columbia, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, 4200 ‐ 600 University Blvd Vancouver British Columbia Canada
- Department of Botany and Biodiversity Research Centre University of British Columbia, Unceded xʷməθkʷəy̓əm (Musqueam) Territory, 3156 ‐ 6270 University Blvd Vancouver British Columbia Canada
- Hakai Institute, PO Box 25039 Campbell River British Columbia
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13
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Pan S, Zhang W, Li Y, Zhou P, Zhang H, Niu L, Wang L. Understanding the ecological processes governing hydrophyte-associated bacterial communities involved in hydrophyte growth and development. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 312:114952. [PMID: 35339791 DOI: 10.1016/j.jenvman.2022.114952] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/11/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
Maintaining hydrophyte growth has been a major focus of aquatic ecological research. The hydrophyte microbiome plays a key role in the growth and health of hydrophytes, but the ecological processes regulating the assembly and function of hydrophyte microbial communities remain unclear. This knowledge gap limits the efficacy of managing microbiomes to enhance the capacity of hydrophytes to restore the aquatic environment. Here, we sampled three typical hydrophytes (Ceratophyllum demersum, Nymphoides peltatum, and Potamogeton crispus) to study the ecological process governing hydrophyte-associated bacterial communities. The results demonstrated that hydrophyte-associated bacterial communities were affected more by the hydrophyte host species (HEEI = 2.40) than by the environment (HEEI = 1.00). The hydrophyte host species not only affected bacterial community assembly, but reduced the diversity and network complexity of the bacterial community relative to that of the environment. Furthermore, the core taxa of two hydrophytes were identified. Chryseobacterium was the core taxon of N. peltatum, and Burkholderia-Caballeronia-Paraburkholderia, Pseudolabrys, and Pajaroellobacter were the core taxa of P. crispus. The core taxa of P. crispus were closely related to potential denitrification-related functions of bacteria and revealed that P. crispus played a role in denitrification during aquatic ecological restoration. Overall, the results of this study highlight the need to develop approaches employing hydrophyte-associated bacteria to promote the development of hydrophytes, which will be essential for increasing the utility of hydrophyte microbiomes in the future and enhancing aquatic ecological restoration.
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Affiliation(s)
- Shenyang Pan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Wenlong Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Pengcheng Zhou
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Huanjun Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Lihua Niu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Longfei Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
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14
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Hervé V, Lambourdière J, René-Trouillefou M, Devault DA, Lopez PJ. Sargassum Differentially Shapes the Microbiota Composition and Diversity at Coastal Tide Sites and Inland Storage Sites on Caribbean Islands. Front Microbiol 2021; 12:701155. [PMID: 34777271 PMCID: PMC8586501 DOI: 10.3389/fmicb.2021.701155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 10/01/2021] [Indexed: 12/03/2022] Open
Abstract
Rafts of drifting pelagic Sargassum that are circulating across the Atlantic Ocean are complex ecosystems composed of a large number of associated species. Upon massive stranding, they lead to various socio-environmental issues including the inflow of contaminants and human health concerns. In this study, we used metabarcoding approaches to examine the differences in both the eukaryotic- and prokaryotic-associated communities from Sargassum present in two islands of the Lesser Antilles, namely Guadeloupe and Martinique. We detected significant differences in microbial community structure and composition between landing Sargassum, the surrounding seawater, and Sargassum from inland storage sites. In total we identified 22,214 prokaryotic and 17,679 eukaryotic OTUs. Among them, functional prediction analyses revealed a number of prokaryotes that might contribute to organic matter decomposition, nitrogen cycling and gas production, including sulfate-reducing bacteria at coastal landing sites, and methanogenic archaea at inland storage sites. We also found that Metazoan was the most abundant group in Sargassum samples, with nematode clades that presented exclusive or specific richness and abundance patterns depending on their Sargassum substrate. Together, these molecular inventories of the micro- and meiofauna communities provide baseline information for further characterization of trophic interactions, algal organic matter decomposition and nutrient transfers at coastal and inland storage sites.
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Affiliation(s)
- Vincent Hervé
- Max Planck Institute for Terrestrial Microbiology, Marburg, Germany.,Institut de Recherche sur la Biologie de l'Insecte, UMR 7261, CNRS-Université de Tours, Avenue Monge, Tours, France
| | - Josie Lambourdière
- Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique UMR-8067, Sorbonne Université, Institut de Recherche pour le Développement, Université de Caen Normandie, Université des Antilles, Paris, France
| | - Malika René-Trouillefou
- Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique UMR-8067, Sorbonne Université, Institut de Recherche pour le Développement, Université de Caen Normandie, Université des Antilles, Paris, France
| | - Damien Alain Devault
- Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique UMR-8067, Sorbonne Université, Institut de Recherche pour le Développement, Université de Caen Normandie, Université des Antilles, Paris, France
| | - Pascal Jean Lopez
- Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA), Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique UMR-8067, Sorbonne Université, Institut de Recherche pour le Développement, Université de Caen Normandie, Université des Antilles, Paris, France
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15
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Korlević M, Markovski M, Zhao Z, Herndl GJ, Najdek M. Seasonal Dynamics of Epiphytic Microbial Communities on Marine Macrophyte Surfaces. Front Microbiol 2021; 12:671342. [PMID: 34603223 PMCID: PMC8482799 DOI: 10.3389/fmicb.2021.671342] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/10/2021] [Indexed: 11/13/2022] Open
Abstract
Surfaces of marine macrophytes are inhabited by diverse microbial communities. Most studies focusing on epiphytic communities of macrophytes did not take into account temporal changes or applied low sampling frequency approaches. The seasonal dynamics of epiphytic microbial communities was determined in a meadow of Cymodocea nodosa invaded by Caulerpa cylindracea and in a monospecific settlement of C. cylindracea at monthly intervals. For comparison the ambient prokaryotic picoplankton community was also characterized. At the OTU level, the microbial community composition differed between the ambient water and the epiphytic communities exhibiting host-specificity. Also, successional changes were observed connected to the macrophyte growth cycle. Taxonomic analysis, however, showed similar high rank taxa (phyla and classes) in the ambient water and the epiphytic communities, with the exception of Desulfobacterota, which were only found on C. cylindracea. Cyanobacteria showed seasonal changes while other high rank taxa were present throughout the year. In months of high Cyanobacteria presence the majority of cyanobacterial sequences were classified as Pleurocapsa. Phylogenetic groups present throughout the year (e.g., Saprospiraceae, Rhodobacteraceae, members without known relatives within Gammaproteobacteria, Desulfatitalea, and members without known relatives within Desulfocapsaceae) constituted most of the sequences, while less abundant taxa showed seasonal patterns connected to the macrophyte growth cycle. Taken together, epiphytic microbial communities of the seagrass C. nodosa and the macroalga C. cylindracea appear to be host-specific and contain taxa that undergo successional changes.
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Affiliation(s)
- Marino Korlević
- Center for Marine Research, Ruđer Bošković Institute, Rovinj, Croatia
| | - Marsej Markovski
- Center for Marine Research, Ruđer Bošković Institute, Rovinj, Croatia
| | - Zihao Zhao
- Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
| | - Gerhard J Herndl
- Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria.,Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Utrecht University, Den Burg, Netherlands
| | - Mirjana Najdek
- Center for Marine Research, Ruđer Bošković Institute, Rovinj, Croatia
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