{"id":27,"date":"2008-10-15T10:55:44","date_gmt":"2008-10-15T17:55:44","guid":{"rendered":"https:\/\/econscience.org\/blog\/?p=27"},"modified":"2008-10-15T10:55:44","modified_gmt":"2008-10-15T17:55:44","slug":"robin-kodner-bringing-genomics-to-geobiology","status":"publish","type":"post","link":"https:\/\/econscience.org\/blog\/2008\/10\/15\/robin-kodner-bringing-genomics-to-geobiology\/","title":{"rendered":"Robin Kodner: Bringing genomics to geobiology"},"content":{"rendered":"<p>Fate of the organic molecules generated by primary productivity in the surface ocean:<\/p>\n<ul>\n<li>carbohydrates, proteins, and nucleic acids (biological pump acts on these)<\/li>\n<li>lipids and structural polymers (diagenesis turns these into organic fossils, kerogen, &amp; bitumen (oil)<\/li>\n<\/ul>\n<p>Organismal part of talk (examples of sterols used as biomarkers)<\/p>\n<ol>\n<li>diversity of sterols and steranes (branches can indicate phylogeny)<\/li>\n<li>C_30 isopropylcholesterol likely associated with sponges<\/li>\n<\/ol>\n<p>Population level (metagenomics)<\/p>\n<ol>\n<li>C_29 steranes (dominant [relative to C28} in Paleozoic)<\/li>\n<li>One explanation is that C29 may be typical of green algae, while C28 indicate modern phytoplankton (that arose ~200 Mya)<\/li>\n<li>But C29 sterols are made by MANY eukaryotes.\u00c2\u00a0 Green algae (Charophyceae) are implicated because they have a good fossil record back into the Paleozoic).<\/li>\n<li>Ternary diagram shows that Prasinophytes (likely modern analog of the Paleozoic green algae) have lower C29\/C28 ratio than groups of green algae [Kodner, Geobiology, 2008]<\/li>\n<\/ol>\n<ul>\n<li>Advantage of studying modern orgs is that nucleic acids are available for taxonomic survey, in addition to lipids.<\/li>\n<li>Sequence a aggregated sample, compare with sequence database, use search alignment tool (BLAST), and compare with reference sequences to get reference phylogeny<\/li>\n<\/ul>\n<p>My Qs:<\/p>\n<p>Where does all the sulfur come from in crude oil?<\/p>\n<p>Is it clear that diagenesis does not degrade sterol structure?\u00c2\u00a0 If so, what organisms generated the fossil molecules we call fuel?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fate of the organic molecules generated by primary productivity in the surface ocean: carbohydrates, proteins, and nucleic acids (biological pump acts on these) lipids and structural polymers (diagenesis turns these into organic fossils, kerogen, &amp; bitumen (oil) Organismal part of &hellip; <a href=\"https:\/\/econscience.org\/blog\/2008\/10\/15\/robin-kodner-bringing-genomics-to-geobiology\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[5,4,6],"tags":[8],"class_list":["post-27","post","type-post","status-publish","format-standard","hentry","category-algae","category-biofuels","category-phytoplankton","tag-robin-kodner-genomics-geobiology"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8qtAj-r","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/posts\/27","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/comments?post=27"}],"version-history":[{"count":3,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/posts\/27\/revisions"}],"predecessor-version":[{"id":30,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/posts\/27\/revisions\/30"}],"wp:attachment":[{"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/media?parent=27"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/categories?post=27"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/econscience.org\/blog\/wp-json\/wp\/v2\/tags?post=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}