{"638088":{"#nid":"638088","#data":{"type":"event","title":"Fingerprinting the Impacts of Environmental Change within Coral Reef Ecosystems","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EThe School of Earth and Atmospheric Sciences Presents Isaiah Bolden, University of Washington\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EFingerprinting the Impacts of Environmental Change within Coral Reef Ecosystems\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECoral reef ecosystems are known to be in a global state of decline, largely attributed to sea-surface warming, ocean acidification, pollution, disease, and other direct human contributions. The impending transition away from calcium carbonate (CaCO3) substrates to\u0026nbsp;macroalgae dominance within these\u0026nbsp;environments could translate to major losses in marine biodiversity, erosion of protective coastal barriers, stress on major fisheries, and numerous other sociocultural and economic impacts.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMy research\u0026nbsp;combines\u0026nbsp;discrete and autonomous\u0026nbsp;measurements of carbonate chemistry, trace metal, and carbon isotope variability within coral reef environments, quantitative decomposition models of\u0026nbsp;biogeochemical fluxes within reefs, and high-resolution mass spectrometry to investigate various geochemical proxies as fingerprints of stress-induced changes in reef metabolism and\u0026nbsp;community\u0026nbsp;composition.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003ESpecifically, I will report on (1) the limitations of assuming canonical metabolic closing of carbon and oxygen budgets on reefs, (2) temporal variability in the seawater Sr\/Ca ratio on reefs as an indicator of\u0026nbsp;calcifier community composition, and (3) variability in the \u0026delta;13C value of seawater dissolved inorganic carbon (DIC) on reefs as a proxy for benthic primary producer community composition.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe ultimate goal of this work is to construct a sophisticated and quantitative toolkit for detecting and monitoring trophic transitions within reefs around the world.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Isaiah Bolden, Earth and Atmospheric Sciences"}],"uid":"34458","created_gmt":"2020-08-19 16:54:40","changed_gmt":"2020-08-19 16:55:38","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2020-08-27T13:30:00-04:00","event_time_end":"2020-08-27T14:25:00-04:00","event_time_end_last":"2020-08-27T14:25:00-04:00","gmt_time_start":"2020-08-27 17:30:00","gmt_time_end":"2020-08-27 18:25:00","gmt_time_end_last":"2020-08-27 18:25:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"633453":{"id":"633453","type":"image","title":"Isaiah Bolden","body":null,"created":"1583859690","gmt_created":"2020-03-10 17:01:30","changed":"1583859690","gmt_changed":"2020-03-10 17:01:30","alt":"","file":{"fid":"241034","name":"Isaiah Bolden.jpg","image_path":"\/sites\/default\/files\/images\/Isaiah%20Bolden.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/Isaiah%20Bolden.jpg","mime":"image\/jpeg","size":66061,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/Isaiah%20Bolden.jpg?itok=5ti2mmdK"}}},"media_ids":["633453"],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (EAS)"}],"categories":[],"keywords":[{"id":"175623","name":"EAS Seminar"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EDr. Greg Huey\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}