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  1. Article: Editorial: Evolution and diversity of avian gut microbiomes.

    Bodawatta, Kasun H / Kogut, Michael / Taylor, Michael W

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1348762

    Language English
    Publishing date 2023-12-20
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1348762
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Indirect maternal effects via nest microbiome composition drive gut colonization in altricial chicks

    Diez‐Méndez, David / Bodawatta, Kasun H. / Freiberga, Inga / Klečková, Irena / Jønsson, Knud A. / Poulsen, Michael / Sam, Katerina

    Molecular Ecology. 2023 July, v. 32, no. 13 p.3657-3671

    2023  

    Abstract: Gut microbial communities are complex and heterogeneous and play critical roles for animal hosts. Early‐life disruptions to microbiome establishment can negatively impact host fitness and development. However, the consequences of such early‐life ... ...

    Abstract Gut microbial communities are complex and heterogeneous and play critical roles for animal hosts. Early‐life disruptions to microbiome establishment can negatively impact host fitness and development. However, the consequences of such early‐life disruptions remain unknown in wild birds. To help fill this gap, we investigated the effect of continuous early‐life gut microbiome disruptions on the establishment and development of gut communities in wild Great tit (Parus major) and Blue tit (Cyanistes caeruleus) nestlings by applying antibiotics and probiotics. Treatment neither affected nestling growth nor their gut microbiome composition. Independent of treatment, nestling gut microbiomes of both species grouped by brood, which shared the highest numbers of bacterial taxa with both nest environment and their mother. Although fathers showed different gut communities than their nestlings and nests, they still contributed to structuring chick microbiomes. Lastly, we observed that the distance between nests increased inter‐brood microbiome dissimilarity, but only in Great tits, indicating that species‐specific foraging behaviour and/or microhabitat influence gut microbiomes. Overall, the strong maternal effect, driven by continuous recolonization from the nest environment and vertical transfer of microbes during feeding, appears to provide resilience towards early‐life disruptions in nestling gut microbiomes.
    Keywords Cyanistes caeruleus ; Parus major ; chicks ; digestive system ; intestinal microorganisms ; maternal effect ; microbiome ; microhabitats ; nests ; probiotics
    Language English
    Dates of publication 2023-07
    Size p. 3657-3671.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 1126687-9
    ISSN 1365-294X ; 0962-1083
    ISSN (online) 1365-294X
    ISSN 0962-1083
    DOI 10.1111/mec.16959
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  3. Article: Avian gut microbiomes taking flight

    Bodawatta, Kasun H. / Hird, Sarah M. / Grond, Kirsten / Poulsen, Michael / Jønsson, Knud A.

    Elsevier Ltd Trends in microbiology. 2022 Mar., v. 30, no. 3

    2022  

    Abstract: Birds harbor complex gut bacterial communities that may sustain their ecologies and facilitate their biological roles, distribution, and diversity. Research on gut microbiomes in wild birds is surging and it is clear that they are diverse and important – ...

    Abstract Birds harbor complex gut bacterial communities that may sustain their ecologies and facilitate their biological roles, distribution, and diversity. Research on gut microbiomes in wild birds is surging and it is clear that they are diverse and important – but strongly influenced by a series of environmental factors. To continue expanding our understanding of how the internal ecosystems of birds work in their natural settings, we believe the most pressing needs involve studies on the functional and evolutionary aspects of these symbioses. Here we summarize the state of the field and provide a roadmap for future studies on aspects that are pivotal to understanding the biology of avian gut microbiomes, emphasizing prospects for integrating gut microbiome work in avian conservation and host health monitoring.
    Keywords digestive system ; flight ; intestinal microorganisms ; microbiome ; wildlife management
    Language English
    Dates of publication 2022-03
    Size p. 268-280.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1158963-2
    ISSN 1878-4380 ; 0966-842X
    ISSN (online) 1878-4380
    ISSN 0966-842X
    DOI 10.1016/j.tim.2021.07.003
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  4. Article ; Online: Indirect maternal effects via nest microbiome composition drive gut colonization in altricial chicks.

    Diez-Méndez, David / Bodawatta, Kasun H / Freiberga, Inga / Klečková, Irena / Jønsson, Knud A / Poulsen, Michael / Sam, Katerina

    Molecular ecology

    2023  Volume 32, Issue 13, Page(s) 3657–3671

    Abstract: Gut microbial communities are complex and heterogeneous and play critical roles for animal hosts. Early-life disruptions to microbiome establishment can negatively impact host fitness and development. However, the consequences of such early-life ... ...

    Abstract Gut microbial communities are complex and heterogeneous and play critical roles for animal hosts. Early-life disruptions to microbiome establishment can negatively impact host fitness and development. However, the consequences of such early-life disruptions remain unknown in wild birds. To help fill this gap, we investigated the effect of continuous early-life gut microbiome disruptions on the establishment and development of gut communities in wild Great tit (Parus major) and Blue tit (Cyanistes caeruleus) nestlings by applying antibiotics and probiotics. Treatment neither affected nestling growth nor their gut microbiome composition. Independent of treatment, nestling gut microbiomes of both species grouped by brood, which shared the highest numbers of bacterial taxa with both nest environment and their mother. Although fathers showed different gut communities than their nestlings and nests, they still contributed to structuring chick microbiomes. Lastly, we observed that the distance between nests increased inter-brood microbiome dissimilarity, but only in Great tits, indicating that species-specific foraging behaviour and/or microhabitat influence gut microbiomes. Overall, the strong maternal effect, driven by continuous recolonization from the nest environment and vertical transfer of microbes during feeding, appears to provide resilience towards early-life disruptions in nestling gut microbiomes.
    MeSH term(s) Animals ; Maternal Inheritance ; Passeriformes/microbiology ; Microbiota ; Gastrointestinal Microbiome ; Chickens ; Songbirds
    Language English
    Publishing date 2023-04-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1126687-9
    ISSN 1365-294X ; 0962-1083
    ISSN (online) 1365-294X
    ISSN 0962-1083
    DOI 10.1111/mec.16959
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  5. Article: Foraging <em>Macrotermes natalensis</em> Fungus-Growing Termites Avoid a Mycopathogen but Not an Entomopathogen

    Bodawatta, Kasun H / Poulsen, Michael / Bos, Nick

    Insects. 2019 June 26, v. 10, no. 7

    2019  

    Abstract: Fungus-growing termites have to defend both themselves and their monoculture fungal cultivars from antagonistic microbes. One of the ways that pathogens can enter the termite colony is on the plant substrate that is collected by termite foragers. In ... ...

    Abstract Fungus-growing termites have to defend both themselves and their monoculture fungal cultivars from antagonistic microbes. One of the ways that pathogens can enter the termite colony is on the plant substrate that is collected by termite foragers. In order to understand whether foragers avoid substrate infected with antagonists, we offered sub-colonies of Macrotermes natalensis a choice between food exposed to either a mycopathogenic or an entomopathogenic fungus, and control food. Workers did not show any preference between entomopathogen-exposed and control substrate, but significantly avoided the mycopathogen-exposed substrate. This suggests that the behaviour of foraging workers is more strongly influenced by pathogens affecting their crop than those posing risks to the termite workers themselves.
    Keywords Macrotermes natalensis ; antagonists ; cultivars ; entomopathogenic fungi ; foraging ; risk
    Language English
    Dates of publication 2019-0626
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ISSN 2075-4450
    DOI 10.3390/insects10070185
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  6. Article: Foraging

    Bodawatta, Kasun H / Poulsen, Michael / Bos, Nick

    Insects

    2019  Volume 10, Issue 7

    Abstract: Fungus-growing termites have to defend both themselves and their monoculture fungal cultivars from antagonistic microbes. One of the ways that pathogens can enter the termite colony is on the plant substrate that is collected by termite foragers. In ... ...

    Abstract Fungus-growing termites have to defend both themselves and their monoculture fungal cultivars from antagonistic microbes. One of the ways that pathogens can enter the termite colony is on the plant substrate that is collected by termite foragers. In order to understand whether foragers avoid substrate infected with antagonists, we offered sub-colonies of
    Language English
    Publishing date 2019-06-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662247-6
    ISSN 2075-4450
    ISSN 2075-4450
    DOI 10.3390/insects10070185
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  7. Article ; Online: Disentangling the Relative Roles of Vertical Transmission, Subsequent Colonizations, and Diet on Cockroach Microbiome Assembly.

    Renelies-Hamilton, Justinn / Germer, Kristjan / Sillam-Dussès, David / Bodawatta, Kasun H / Poulsen, Michael

    mSphere

    2021  Volume 6, Issue 1

    Abstract: A multitude of factors affect the assemblies of complex microbial communities associated with animal hosts, with implications for community flexibility, resilience, and long-term stability; however, their relative effects have rarely been deduced. Here, ... ...

    Abstract A multitude of factors affect the assemblies of complex microbial communities associated with animal hosts, with implications for community flexibility, resilience, and long-term stability; however, their relative effects have rarely been deduced. Here, we use a tractable lab model to quantify the relative and combined effects of parental transmission (egg case microbiome present/reduced), gut inocula (cockroach versus termite gut provisioned), and varying diets (matched or unmatched with gut inoculum source) on gut microbiota structure of hatchlings of the omnivorous cockroach
    MeSH term(s) Animals ; Anti-Infective Agents/pharmacology ; Bacteria/classification ; Bacteria/drug effects ; Bacteria/genetics ; Bacteria/pathogenicity ; Cockroaches/drug effects ; Cockroaches/microbiology ; Diet ; Host Specificity ; Infectious Disease Transmission, Vertical ; Microbiota/genetics ; Microbiota/physiology ; Ovum/drug effects ; Ovum/microbiology ; Phylogeny ; RNA, Ribosomal, 16S
    Chemical Substances Anti-Infective Agents ; RNA, Ribosomal, 16S
    Language English
    Publishing date 2021-01-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2379-5042
    ISSN (online) 2379-5042
    DOI 10.1128/mSphere.01023-20
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Flexibility and resilience of great tit (Parus major) gut microbiomes to changing diets.

    Bodawatta, Kasun H / Freiberga, Inga / Puzejova, Katerina / Sam, Katerina / Poulsen, Michael / Jønsson, Knud A

    Animal microbiome

    2021  Volume 3, Issue 1, Page(s) 20

    Abstract: Background: Gut microbial communities play important roles in nutrient management and can change in response to host diets. The extent of this flexibility and the concomitant resilience is largely unknown in wild animals. To untangle the dynamics of ... ...

    Abstract Background: Gut microbial communities play important roles in nutrient management and can change in response to host diets. The extent of this flexibility and the concomitant resilience is largely unknown in wild animals. To untangle the dynamics of avian-gut microbiome symbiosis associated with diet changes, we exposed Parus major (Great tits) fed with a standard diet (seeds and mealworms) to either a mixed (seeds, mealworms and fruits), a seed, or a mealworm diet for 4 weeks, and examined the flexibility of gut microbiomes to these compositionally different diets. To assess microbiome resilience (recovery potential), all individuals were subsequently reversed to a standard diet for another 4 weeks. Cloacal microbiomes were collected weekly and characterised through sequencing the v4 region of the 16S rRNA gene using Illumina MiSeq.
    Results: Initial microbiomes changed significantly with the diet manipulation, but the communities did not differ significantly between the three diet groups (mixed, seed and mealworm), despite multiple diet-specific changes in certain bacterial genera. Reverting birds to the standard diet led only to a partial recovery in gut community compositions. The majority of the bacterial taxa that increased significantly during diet manipulation decreased in relative abundance after reversion to the standard diet; however, bacterial taxa that decreased during the manipulation rarely increased after diet reversal CONCLUSIONS: The gut microbial response and partial resilience to dietary changes support that gut bacterial communities of P. major play a role in accommodating dietary changes experienced by wild avian hosts. This may be a contributing factor to the relaxed association between microbiome composition and the bird phylogeny. Our findings further imply that interpretations of wild bird gut microbiome analyses from single-time point sampling, especially for omnivorous species or species with seasonally changing diets, should be done with caution. The partial community recovery implies that ecologically relevant diet changes (e.g., seasonality and migration) open up gut niches that may be filled by previously abundant microbes or replaced by different symbiont lineages, which has important implications for the integrity and specificity of long-term avian-symbiont associations.
    Language English
    Publishing date 2021-02-18
    Publishing country England
    Document type Journal Article
    ISSN 2524-4671
    ISSN (online) 2524-4671
    DOI 10.1186/s42523-021-00076-6
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  9. Article: Species- and Caste-Specific Gut Metabolomes in Fungus-Farming Termites.

    Vidkjær, Nanna Hjort / Schmidt, Suzanne / Hu, Haofu / Bodawatta, Kasun H / Beemelmanns, Christine / Poulsen, Michael

    Metabolites

    2021  Volume 11, Issue 12

    Abstract: Fungus-farming termites host gut microbial communities that contribute to the pre-digestion of plant biomass for manuring the fungal mutualist, and potentially to the production of defensive compounds that suppress antagonists. Termite colonies are ... ...

    Abstract Fungus-farming termites host gut microbial communities that contribute to the pre-digestion of plant biomass for manuring the fungal mutualist, and potentially to the production of defensive compounds that suppress antagonists. Termite colonies are characterized by complex division of labor and differences in diet between termite size (minor and major) and morphological (worker and soldier) castes, and this extends to the composition of their gut microbial communities. We hypothesized that gut metabolomes should mirror these differences and tested this through untargeted LC-MS/MS analyses of three South African species of fungus-farming termites. We found distinct metabolomes between species and across castes, especially between soldiers and workers. Primary metabolites dominate the metabolomes and the high number of overlapping features with the mutualistic fungus and plant material show distinct impacts of diet and the environment. The identification of a few bioactive compounds of likely microbial origin underlines the potential for compound discovery among the many unannotated features. Our untargeted approach provides a first glimpse into the complex gut metabolomes and our dereplication suggests the presence of bioactive compounds with potential defensive roles to be targeted in future studies.
    Language English
    Publishing date 2021-12-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662251-8
    ISSN 2218-1989
    ISSN 2218-1989
    DOI 10.3390/metabo11120839
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  10. Article ; Online: Species-specific but not phylosymbiotic gut microbiomes of New Guinean passerine birds are shaped by diet and flight-associated gut modifications.

    Bodawatta, Kasun H / Koane, Bonny / Maiah, Gibson / Sam, Katerina / Poulsen, Michael / Jønsson, Knud A

    Proceedings. Biological sciences

    2021  Volume 288, Issue 1949, Page(s) 20210446

    Abstract: Animal hosts have evolved intricate associations with microbial symbionts, where both depend on each other for particular functions. In many cases, these associations lead to phylosymbiosis, where phylogenetically related species harbour compositionally ... ...

    Abstract Animal hosts have evolved intricate associations with microbial symbionts, where both depend on each other for particular functions. In many cases, these associations lead to phylosymbiosis, where phylogenetically related species harbour compositionally more similar microbiomes than distantly related species. However, evidence for phylosymbiosis is either weak or lacking in gut microbiomes of flying vertebrates, particularly in birds. To shed more light on this phenomenon, we compared cloacal microbiomes of 37 tropical passerine bird species from New Guinea using 16S rRNA bacterial gene sequencing. We show a lack of phylosymbiosis and document highly variable microbiomes. Furthermore, we find that gut bacterial community compositions are species-specific and tend to be shaped by host diet but not sampling locality, potentially driven by the similarities in habitats used by individual species. We further show that flight-associated gut modifications, coupled with individual dietary differences, shape gut microbiome structure and variation, contributing to the lack of phylosymbiosis. These patterns indicate that the stability of symbiosis may depend on microbial functional diversity rather than taxonomic composition. Furthermore, the more variable and fluid host-microbe associations suggest probable disparities in the potential for coevolution between bird host species and microbial symbionts.
    MeSH term(s) Animals ; Diet ; Gastrointestinal Microbiome ; New Guinea ; Passeriformes ; Phylogeny ; RNA, Ribosomal, 16S/genetics
    Chemical Substances RNA, Ribosomal, 16S
    Language English
    Publishing date 2021-04-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
    ISSN (online) 1471-2954
    ISSN 0080-4649 ; 0962-8452 ; 0950-1193
    DOI 10.1098/rspb.2021.0446
    Database MEDical Literature Analysis and Retrieval System OnLINE

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