{"658567":{"#nid":"658567","#data":{"type":"event","title":"PhD Defense by Daniel Muratore","body":[{"value":"\u003Cp\u003EIn partial fulfillment of the requirements for the degree of\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDoctor of Philosophy in Quantitative Biosciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ein the School of Biological Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDaniel Muratore\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cbr \/\u003E\r\nDefends their thesis:\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003EEmergence of Marine Biogeochemical Dynamics Across Scales Drive by Complex Microbial and Viral Communities\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nThursday, June 9\u003Csup\u003Eth\u003C\/sup\u003E, 2022\u003Cbr \/\u003E\r\n11am Eastern Time\u003Cbr \/\u003E\r\nKlaus Advanced Computing Building\u003Cbr \/\u003E\r\n1116 East Seminar Room\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca name=\u0022_Hlk101764487\u0022\u003EVirtual = \u003C\/a\u003E\u0026nbsp;\u003Ca href=\u0022https:\/\/gatech.zoom.us\/j\/93131163215\u0022 target=\u0022_blank\u0022\u003Ehttps:\/\/gatech.zoom.us\/j\/93131163215\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EOpen to the Community\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca name=\u0022_Hlk99552581\u0022\u003EAdvisor: \u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Joshua Weitz\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Biological Sciences, School of Physics\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cbr \/\u003E\r\nCommittee Members:\u003Cbr \/\u003E\r\nDr. Takamitsu Ito\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Earth and Atmospheric Sciences\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. B. Aditya Prakash\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESchool of Computational Science and Engineering\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Frank Stewart\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDepartment of Microbiology and Immunology\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMontana State University\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Angelicque White\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDepartment of Oceanography, Center for Microbial Oceanography: Research and Education\u003C\/p\u003E\r\n\r\n\u003Cp\u003EUniversity of Hawai\u0026rsquo;i at M\u0101noa\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cbr \/\u003E\r\nAbstract:\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMarine microbial populations are subject to the dual pressures of bottom-up nutrient limitation and top-down infection by abundant viruses. However, top-down and bottom-up controls do not act independently. Environmental conditions also have a large impact on the ecology and evolution of viral populations. This thesis explores the mutual feedbacks between the bottom-up and top-down drivers of marine microbial ecosystems.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe first part of this thesis studies two Lagrangian field campaigns conducted in oligotrophic gyres \u0026ndash; one in the North Pacific and one in the Sargasso Sea. Emergent ecosystem-level diel cycles in nutrient uptake and assimilation show partitioning of key limiting resources. We also identify diel coordination of viral gene transcription across vast viral diversity.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe second part studies eco-evolutionary responses of marine virus infection strategies and variable environmental conditions. A comparative metagenomic study of genomic and proteomic nitrogen content across the Eastern Tropical North Pacific oxygen minimum zone identifies genome streamlining in bacteria, archaea, and viruses across nitrogen gradients. Then, we construct and analyze a game theoretic model of the evolution of strategies for viruses and their hosts in iron-limited environments, where viruses can use specialized host iron uptake mechanisms to facilitate infection. We identify conditions for the coexistence of hosts with and without this iron uptake capacity, and viruses that do or do not leverage it for infection.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Emergence of Marine Biogeochemical Dynamics Across Scales Drive by Complex Microbial and Viral Communities"}],"uid":"27707","created_gmt":"2022-05-27 17:03:16","changed_gmt":"2022-05-27 17:03:16","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-06-09T12:00:00-04:00","event_time_end":"2022-06-09T14:00:00-04:00","event_time_end_last":"2022-06-09T14:00:00-04:00","gmt_time_start":"2022-06-09 16:00:00","gmt_time_end":"2022-06-09 18:00:00","gmt_time_end_last":"2022-06-09 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}