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- W4387424131 abstract "Abstract Background and Aims Contrasting patterns of host and microbiome biogeography can provide insight into the drivers of microbial community assembly. Distance-decay relationships are a classic biogeographic pattern that are shaped by interactions between selective and non-selective processes. Joint biogeography of microbiomes and their hosts are of increasing interest due to the potential for microbiome-facilitated adaptation. Methods In this study we examine the coupled biogeography of the model macroalgae Durvillaea and its microbiome using a combination of Genotyping-by-Sequencing (host) and 16S rRNA amplicon sequencing (microbiome). Alongside these approaches, we employ environmental data to characterize the relationship between the microbiome, the host, and the environment. Key Results We show that although host and microbiome exhibit shared biogeographic structure, these arise from different processes – with host biogeography showing classic signs of geographic distance decay, but the microbiome showing environmental distance decay. Examination of microbial sub communities, defined by abundance, revealed that the abundance of microbes is linked to environmental selection. As microbes become less common, the dominant ecological processes shift away from selective processes and towards neutral processes. Contrary to expectations, we found that ecological drift does not promote structuring of the microbiome. Conclusions Our results suggest that although host macroalgae exhibit a relatively ‘typical’ biogeographic pattern of declining similarity with increasing geographic distance, the microbiome is more variable, and is primarily shaped by environmental conditions. Our findings suggest that the Baas Becking hypothesis of “everything is everywhere, the environment selects” may be a useful hypothesis to understand biogeography of macroalgal microbiomes. As environmental conditions change in response to anthropogenic influences, the processes structuring the microbiome of macroalgae may shift while those governing the host biogeography are less likely to change. As a result, increasingly decoupled host-microbe biogeography may be observed in response to such human influences." @default.
- W4387424131 created "2023-10-08" @default.
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- W4387424131 date "2023-10-07" @default.
- W4387424131 modified "2023-10-09" @default.
- W4387424131 title "Macroalgal microbiome biogeography is shaped by environmental drivers rather than geographic distance" @default.
- W4387424131 doi "https://doi.org/10.1093/aob/mcad151" @default.
- W4387424131 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37804485" @default.
- W4387424131 hasPublicationYear "2023" @default.
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