Browsing by Author "Hume, Benjamin C. C."

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    Building consensus around the assessment and interpretation of Symbiodiniaceae diversity
    (PeerJ, Inc, 2023) Davies, Sarah W.; Gamache, Matthew H.; Howe-Kerr, Lauren I.; Kriefall, Nicola G.; Baker, Andrew C.; Banaszak, Anastazia T.; Bay, Line Kolind; Bellantuono, Anthony J.; Bhattacharya, Debashish; Chan, Cheong Xin; Claar, Danielle C.; Coffroth, Mary Alice; Cunning, Ross; Davy, Simon K.; Campo, Javier del; Díaz-Almeyda, Erika M.; Frommlet, Jörg C.; Fuess, Lauren E.; González-Pech, Raúl A.; Goulet, Tamar L.; Hoadley, Kenneth D.; Howells, Emily J.; Hume, Benjamin C. C.; Kemp, Dustin W.; Kenkel, Carly D.; Kitchen, Sheila A.; LaJeunesse, Todd C.; Lin, Senjie; McIlroy, Shelby E.; McMinds, Ryan; Nitschke, Matthew R.; Oakley, Clinton A.; Peixoto, Raquel S.; Prada, Carlos; Putnam, Hollie M.; Quigley, Kate; Reich, Hannah G.; Reimer, James Davis; Rodriguez-Lanetty, Mauricio; Rosales, Stephanie M.; Saad, Osama S.; Sampayo, Eugenia M.; Santos, Scott R.; Shoguchi, Eiichi; Smith, Edward G.; Stat, Michael; Stephens, Timothy G.; Strader, Marie E.; Suggett, David J.; Swain, Timothy D.; Tran, Cawa; Traylor-Knowles, Nikki; Voolstra, Christian R.; Warner, Mark E.; Weis, Virginia M.; Wright, Rachel M.; Xiang, Tingting; Yamashita, Hiroshi; Ziegler, Maren; Correa, Adrienne M. S.; Parkinson, John Everett
    Within microeukaryotes, genetic variation and functional variation sometimes accumulate more quickly than morphological differences. To understand the evolutionary history and ecology of such lineages, it is key to examine diversity at multiple levels of organization. In the dinoflagellate family Symbiodiniaceae, which can form endosymbioses with cnidarians (e.g., corals, octocorals, sea anemones, jellyfish), other marine invertebrates (e.g., sponges, molluscs, flatworms), and protists (e.g., foraminifera), molecular data have been used extensively over the past three decades to describe phenotypes and to make evolutionary and ecological inferences. Despite advances in Symbiodiniaceae genomics, a lack of consensus among researchers with respect to interpreting genetic data has slowed progress in the field and acted as a barrier to reconciling observations. Here, we identify key challenges regarding the assessment and interpretation of Symbiodiniaceae genetic diversity across three levels: species, populations, and communities. We summarize areas of agreement and highlight techniques and approaches that are broadly accepted. In areas where debate remains, we identify unresolved issues and discuss technologies and approaches that can help to fill knowledge gaps related to genetic and phenotypic diversity. We also discuss ways to stimulate progress, in particular by fostering a more inclusive and collaborative research community. We hope that this perspective will inspire and accelerate coral reef science by serving as a resource to those designing experiments, publishing research, and applying for funding related to Symbiodiniaceae and their symbiotic partnerships.
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    Endogenous viral elements reveal associations between a non-retroviral RNA virus and symbiotic dinoflagellate genomes
    (Springer Nature, 2023) Veglia, Alex J.; Bistolas, Kalia S. I.; Voolstra, Christian R.; Hume, Benjamin C. C.; Ruscheweyh, Hans-Joachim; Planes, Serge; Allemand, Denis; Boissin, Emilie; Wincker, Patrick; Poulain, Julie; Moulin, Clémentine; Bourdin, Guillaume; Iwankow, Guillaume; Romac, Sarah; Agostini, Sylvain; Banaigs, Bernard; Boss, Emmanuel; Bowler, Chris; de Vargas, Colomban; Douville, Eric; Flores, Michel; Forcioli, Didier; Furla, Paola; Galand, Pierre E.; Gilson, Eric; Lombard, Fabien; Pesant, Stéphane; Reynaud, Stéphanie; Sunagawa, Shinichi; Thomas, Olivier P.; Troublé, Romain; Zoccola, Didier; Correa, Adrienne M. S.; Vega Thurber, Rebecca L.
    Endogenous viral elements (EVEs) offer insight into the evolutionary histories and hosts of contemporary viruses. This study leveraged DNA metagenomics and genomics to detect and infer the host of a non-retroviral dinoflagellate-infecting +ssRNA virus (dinoRNAV) common in coral reefs. As part of the Tara Pacific Expedition, this study surveyed 269 newly sequenced cnidarians and their resident symbiotic dinoflagellates (Symbiodiniaceae), associated metabarcodes, and publicly available metagenomes, revealing 178 dinoRNAV EVEs, predominantly among hydrocoral-dinoflagellate metagenomes. Putative associations between Symbiodiniaceae and dinoRNAV EVEs were corroborated by the characterization of dinoRNAV-like sequences in 17 of 18 scaffold-scale and one chromosome-scale dinoflagellate genome assembly, flanked by characteristically cellular sequences and in proximity to retroelements, suggesting potential mechanisms of integration. EVEs were not detected in dinoflagellate-free (aposymbiotic) cnidarian genome assemblies, including stony corals, hydrocorals, jellyfish, or seawater. The pervasive nature of dinoRNAV EVEs within dinoflagellate genomes (especially Symbiodinium), as well as their inconsistent within-genome distribution and fragmented nature, suggest ancestral or recurrent integration of this virus with variable conservation. Broadly, these findings illustrate how +ssRNA viruses may obscure their genomes as members of nested symbioses, with implications for host evolution, exaptation, and immunity in the context of reef health and disease.