Effects of Sphagnum Leachate on Competitive Sphagnum Microbiome Depend on Species and Time

Hamard, Samuel; Robroek, Bjorn J. M.; Allard, Pierre‐Marie; Signarbieux, Constant; Zhou, Shuaizhen; Saesong, Tongchai; Baaker, Flore de; Buttler, Alexandre; Chiapusio, Geneviève; Wolfender, Jean‐Luc; Bragazza, Luca; Jassey, Vincent E. J.

doi:10.3389/fmicb.2019.02042

Cited by 31 publications

(35 citation statements)

References 95 publications

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“…Prokaryotes have significantly lower numbers of plant partners, but their associations with plant species are much more specific. This pattern is consistent with observations of plant-specific microbial community compositions (Bragina et al 2012, Hamard et al 2019), yet our results also suggest that compared to the rather specific nature of microbial associations to plant species the plant-microbiome is relatively non-specific. An explanation for this observation would be that one plant species can provide resources or niche space for a wide array of microbes, which in turn are rather specific (Suppl.…”

Section: Discussionsupporting

confidence: 92%

“…Indeed, peatland plants, and Sphagnum mosses in particular, produce recalcitrant litter (Clymo 1965, Dorrepaal et al 2005) and release anti-microbial compounds (Fudyma et al 2019;Hamard et al 2019), which together with acidic and anoxic environmental conditions impede microbial breakdown of organic matter and thus facilitate the accumulation of plant remains. Hence, the C sink function of peatlands is controlled by an interplay between abiotic and biotic factors.…”

Section: Introductionmentioning

confidence: 99%

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Rewiring of peatland plant-microbe networks outpaces species turnover

Robroek

Martí

Svensson

et al. 2020

Preprint

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Enviro-climatological changes are thought to be causing alterations in ecosystem processes through shifts in plant and microbial communities. However, how links between plant and microbial communities change with enviro-climatological change is likely to be less straightforward, but may be fundamental for many ecological processes. To address this, we assessed the composition of the plant community and the prokaryotic community -using amplicon-based sequencing-of three European peatlands that were distinct in enviro-climatological conditions. Bipartite networks were used to construct site-specific plant-prokaryote co-occurrence networks. Our data show that between sites, plant and prokaryotic communities differ and that turnover in interactions between the communities was complex. Essentially, turnover in plant-microbial interactions is much faster than turnover in the respective communities. Our findings suggest that network rewiring does largely result from novel associations between species that are common and shared across the networks. Turnover in network composition is largely driven by novel interactions between a core community of plants and microorganisms. Taken together our results indicate that the functional role of species is context dependent, and that changes in enviro-climatological conditions will likely lead to network rewiring.Integrating turnover in plant-microbe interactions into studies that assess the impact of enviroclimatological change on peatland ecosystems is essential to understand ecosystem dynamics and must be combined with studies on the impact of these changes on ecosystem processes. Keywordsmicrobial and plant diversity, plant-microbe interactions, bipartite networks, 16SrRNA, 16S amplicon sequencing, peatlands.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Rewiring of peatland plant-microbe networks outpaces species turnover

Robroek

Martí

Svensson

et al. 2020

Preprint

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“…Testate amoeba community composition plays an important role in regulating the peatland microbial food web structure (Gilbert et al, 1998a(Gilbert et al, , 2003Jassey et al, 2012Jassey et al, , 2013aLamentowicz et al, 2013a;Meyer et al, 2013), with mounting evidences that shifts in microbial food web structure may be linked to shifts in the functional trait composition of testate amoebae (Jassey et al, 2013b;Lamentowicz et al, 2013a;Hamard et al, 2019). For instance, it has been recently shown that the loss of mixotrophic testate amoebae (Table 1) destabilizes peatland microbial food webs by changing trophic interactions and decreasing connectivity within the microbial network (Hamard et al, 2019). Other research has further demonstrated that shifts in environmental conditions select for testate amoeba taxa with either a high or low trophic level based on their body size features (Lamentowicz et al, 2013a;Jassey et al, 2014;Fournier et al, 2016).…”

Section: Sphagnum-dominated Peatlandsmentioning

confidence: 99%

Testate Amoeba Functional Traits and Their Use in Paleoecology

et al. 2020

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This review provides a synthesis of current knowledge on the morphological and functional traits of testate amoebae, a polyphyletic group of protists commonly used as proxies of past hydrological changes in paleoecological investigations from peatland, lake sediment and soil archives. A trait-based approach to understanding testate amoebae ecology and paleoecology has gained in popularity in recent years, with research showing that morphological characteristics provide complementary information to the commonly used environmental inferences based on testate amoeba (morpho-)species data. We provide a broad overview of testate amoeba morphological and functional traits and trait-environment relationships in the context of ecology, evolution, genetics, biogeography, and paleoecology. As examples we report upon previous ecological and paleoecological studies that used trait-based approaches, and describe key testate amoebae traits that can be used to improve the interpretation of environmental studies. We also highlight knowledge gaps and speculate on potential future directions for the application of trait-based approaches in testate amoeba research.

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“…Our analysis, however also suggests that species in the soil prokaryotic community in peatlands form specific links to species in the plant community (cf. Bragina et al 2012, Hamard et al 2019). Three non‐exclusive scenarios can explain the patterns we observe.…”

Section: Discussionmentioning

confidence: 98%

“…Indeed, decomposition rates in natural peatlands are low. Peatland plants, and Sphagnum mosses in particular, produce recalcitrant litter (Clymo 1965, Dorrepaal et al 2005) and release anti‐microbial compounds (Fudyma et al 2019, Hamard et al 2019), which together with acidic and anoxic environmental conditions impede microbial breakdown of organic matter and thus facilitate the accumulation of plant remains. Hence, the C sink function of peatlands is controlled by an interplay between abiotic and biotic factors.…”

Section: Introductionmentioning

confidence: 99%

Rewiring of peatland plant–microbe networks outpaces species turnover

Robroek

Martí

Svensson

et al. 2021

Oikos

Self Cite

View full text Add to dashboard Cite

Enviro–climatic changes are thought to be causing alterations in ecosystem processes through shifts in plant and microbial communities; however, how links between plant and microbial communities change with enviro–climatic change is likely to be less straightforward but may be fundamental for many ecological processes. To address this, we assessed the composition of the plant community and the prokaryotic community – using amplicon‐based sequencing – of three European peatlands that were distinct in enviro–climatic conditions. Bipartite networks were used to construct site‐specific plant–prokaryote co‐occurrence networks. Our data show that between sites, plant and prokaryotic communities differ and that turnover in interactions between the communities was complex. Essentially, turnover in plant–microbial interactions is much faster than turnover in the respective communities. Our findings suggest that network rewiring does largely result from novel or different interactions between species common to all realised networks. Hence, turnover in network composition is largely driven by the establishment of new interactions between a core community of plants and microorganisms that are shared among all sites. Taken together our results indicate that plant–microbe associations are context dependent, and that changes in enviro–climatic conditions will likely lead to network rewiring. Integrating turnover in plant–microbe interactions into studies that assess the impact of enviro–climatic change on peatland ecosystems is essential to understand ecosystem dynamics and must be combined with studies on the impact of these changes on ecosystem processes.

show abstract

Effects of Sphagnum Leachate on Competitive Sphagnum Microbiome Depend on Species and Time

Cited by 31 publications

References 95 publications

Rewiring of peatland plant-microbe networks outpaces species turnover

Rewiring of peatland plant-microbe networks outpaces species turnover

Testate Amoeba Functional Traits and Their Use in Paleoecology

Rewiring of peatland plant–microbe networks outpaces species turnover

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