Please use this identifier to cite or link to this item: https://doi.org/10.1111/mec.16301
Title: A holobiont view of island biogeography: Unravelling patterns driving the nascent diversification of a Hawaiian spider and its microbial associates
Authors: Armstrong, Ellie E
Perez-Lamarque, Benoit
Bi, Ke
Chen, Cerise
Becking, Leontine E
Lim, Jun Ying 
Linderoth, Tyler
Krehenwinkel, Henrik
Gillespie, Rosemary G
Keywords: Science & Technology
Life Sciences & Biomedicine
Biochemistry & Molecular Biology
Ecology
Evolutionary Biology
Environmental Sciences & Ecology
adaptive radiation
Ariamnes
endosymbiont
Hawaiian Islands
host-associated microbes
population structure
speciation
GUT MICROBIOTA
POPULATION-STRUCTURE
BACTERIAL COMMUNITY
CD-HIT
EVOLUTIONARY
DIVERSITY
WOLBACHIA
PHYLOGENY
ENDOSYMBIONT
INFECTIONS
Issue Date: 15-Dec-2021
Publisher: WILEY
Citation: Armstrong, Ellie E, Perez-Lamarque, Benoit, Bi, Ke, Chen, Cerise, Becking, Leontine E, Lim, Jun Ying, Linderoth, Tyler, Krehenwinkel, Henrik, Gillespie, Rosemary G (2021-12-15). A holobiont view of island biogeography: Unravelling patterns driving the nascent diversification of a Hawaiian spider and its microbial associates. MOLECULAR ECOLOGY 31 (4) : 1299-1316. ScholarBank@NUS Repository. https://doi.org/10.1111/mec.16301
Abstract: The diversification of a host lineage can be influenced by both the external environment and its assemblage of microbes. Here, we use a young lineage of spiders, distributed along a chronologically arranged series of volcanic mountains, to investigate how their associated microbial communities have changed as the spiders colonized new locations. Using the stick spider Ariamnes waikula (Araneae, Theridiidae) on the island of Hawaiʻi, and outgroup taxa on older islands, we tested whether each component of the “holobiont” (spider hosts, intracellular endosymbionts and gut microbial communities) showed correlated signatures of diversity due to sequential colonization from older to younger volcanoes. To investigate this, we generated ddRAD data for the host spiders and 16S rRNA gene amplicon data from their microbiota. We expected sequential colonizations to result in a (phylo)genetic structuring of the host spiders and in a diversity gradient in microbial communities. The results showed that the host A. waikula is indeed structured by geographical isolation, suggesting sequential colonization from older to younger volcanoes. Similarly, the endosymbiont communities were markedly different between Ariamnes species on different islands, but more homogeneous among A. waikula populations on the island of Hawaiʻi. Conversely, the gut microbiota, which we suspect is generally environmentally derived, was largely conserved across all populations and species. Our results show that different components of the holobiont respond in distinct ways to the dynamic environment of the volcanic archipelago. This highlights the necessity of understanding the interplay between different components of the holobiont, to properly characterize its evolution.
Source Title: MOLECULAR ECOLOGY
URI: https://scholarbank.nus.edu.sg/handle/10635/227757
ISSN: 09621083
1365294X
DOI: 10.1111/mec.16301
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