{"id":364,"date":"2019-02-07T09:17:17","date_gmt":"2019-02-07T09:17:17","guid":{"rendered":"https:\/\/andrea-koschinsky.org\/?page_id=364"},"modified":"2025-09-20T19:40:25","modified_gmt":"2025-09-20T19:40:25","slug":"adrian-hollister","status":"publish","type":"page","link":"https:\/\/andrea-koschinsky.org\/pt\/group-members\/adrian-hollister\/","title":{"rendered":"Dr. Adrian Hollister"},"content":{"rendered":"<p><strong> <a href=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-387 alignleft\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623-300x225.jpg 300w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623-768x576.jpg 768w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623-1024x768.jpg 1024w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2019\/04\/IMG_2623.jpg 2016w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Research interests: <\/strong><\/p>\n<p>Trace metals and organic matter in the Amazon and Par\u00e1 River estuary and mixing plume, specifically:<\/p>\n<ul>\n<li>Copper (Cu) speciation and Cu-binding organic ligands along the estuary salinity gradient<\/li>\n<li>Nickel (Ni) and cobalt (Co) speciation and concentrations in surface and depth profiles throughout the estuary<\/li>\n<li>Fluxes of trace metals (Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) from the estuary into the Atlantic Ocean<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Project description and background:<\/strong><\/p>\n<p>Broadly, I am interested in understanding trace metal biogeochemistry in the oceans. Trace metals are essential for life, but are present in nano- or picomolar concentrations in the ocean. For my Master\u2019s thesis (Aug 2016 \u2013 Mar 2019), I worked under Dr. Kristen Buck at the University of South Florida (USF), USA. Here, I researched the regeneration of the trace metals (Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb) and macronutrients (N, P, Si) from phytoplankton assemblages. In April, 2019, I entered a Ph.D. program under Prof. Dr. Andrea Koschinsky at Jacobs University Bremen, where I have continued to research on trace metals biogeochemistry \u2013 this time looking at trace metals in the Amazon River estuary!<\/p>\n<p>The Amazon River is the largest on earth and makes up 15-20% of the global freshwater discharge. It is therefore an important source of dissolved trace metals and organic matter to the Atlantic Ocean. In the estuary, the larger Amazon River also mixes with the smaller Par\u00e1 River to the south (earth\u2019s 5<sup>th<\/sup> largest river), and groundwater from a large mangrove belt from the southeast serves as an additional source of trace metals and organic matter. Together, these waters mix and form a plume that ages as it flows north, mixing with seawater in the Atlantic Ocean. Trace metals are lost or gained during estuary mixing due to factors such as adsorption\/desorption to particles, colloidal flocculation, benthic exchange, or biological activity. However, recent trace metal data from the Amazon and Par\u00e1 estuary are sparse.<\/p>\n<p>I joined the project, \u201cDevelopment of a consistent thermodynamic model of trace element \u2013 organic matter interaction in the ocean,\u201d where I have been working to analyse trace metal and organic ligand samples collected previously on the Amazon-GEOTRACES cruise M147. In this project, I have also been working closely with Dr. Martha Gledhill at GEOMAR Helmholz Centre for Ocean Research. My analytical work has focused on (1) quantification and size fractionation of trace metals (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) in surface and depth samples throughout the estuary and (2) analysis of Cu-organic matter speciation in these samples.<\/p>\n<p>In addition to my work on samples previously collected on M147, I had the opportunity to go to the Amazon myself on cruise M174 (Apr-May 2021) (blog: <a href=\"https:\/\/www.io-warnemuende.de\/rv-meteor-m174-2021.html\">https:\/\/www.io-warnemuende.de\/rv-meteor-m174-2021.html<\/a>). Here, I worked with another PhD student colleague to collect trace metal samples, as well as conducting an incubation experiment to measure Cu-ligand production by phytoplankton. In addition, I participated on the North Sea cruise M169 (Dec 2020) (blog: <a href=\"https:\/\/www.jacobs-university.de\/blog-post-m169\">https:\/\/www.jacobs-university.de\/blog-post-m169<\/a>). This served as the basis for a bachelor student thesis on the analysis of platinum in the North Sea, which I co-supervised. Finally, I had the opportunity to participate in a week-long GEOTRACES summer school in Cadiz Spain (Aug 2019) (<a href=\"https:\/\/geotraces.uca.es\/\" rel=\"nofollow\">https:\/\/geotraces.uca.es\/<\/a>), where I learned first-hand about GEOTRACES trace-metal clean protocol with 40 other students from a total of 19 countries aboard the vessel Intermares. In the future, I hope to return to the Amazon Estuary during a period of low-discharge, which has been already approved as a GEOTRACES cruise. Since both previous Amazon cruises (M147 and M174) took place during the high river discharge period, this cruise will help complete the picture of trace metal cycling in this region.<\/p>\n<hr \/>\n<p><strong>Collaborations<\/strong>:<\/p>\n<p>GEOMAR: <a href=\"https:\/\/www.geomar.de\/en\/\">https:\/\/www.geomar.de\/en\/<\/a><\/p>\n<p>Oldenburg ICBM: <a href=\"https:\/\/uol.de\/en\/icbm\/\">https:\/\/uol.de\/en\/icbm\/<\/a><\/p>\n<hr \/>\n<p><strong>Ongoing projects: <\/strong><\/p>\n<p><em><strong>2019- 2022 Thermodynamic Model (DFG)<\/strong><\/em><\/p>\n<p>Development of a consistent thermodynamic model of trace element \u2013 organic matter interaction in the ocean<\/p>\n<p><em><strong>2016 &#8211; 2020 Amazon-GEOTRACES<\/strong><\/em> (DFG)<\/p>\n<p>RV Meteor (M147) research cruise to Amazon River estuary, May 2018<\/p>\n<p><strong>Previous projects:<\/strong><\/p>\n<p>2016 \u2013 2019: \u201cRegeneration of macronutrients and trace metals during phytoplankton decay: an experimental study\u201d (Advisor: Dr. Kristen Buck, University of South Florida)<\/p>\n<p>R\/V W. T. Hogarth research cruise, Eastern Gulf of Mexico and West Florida shelf, Mar 2018<\/p>\n<p>News interview about the cruise: <a href=\"https:\/\/www.usf.edu\/marine-science\/news\/2018\/usf-students-gain-valuable-experience-on-floating-lab.aspx\">https:\/\/www.usf.edu\/marine-science\/news\/2018\/usf-students-gain-valuable-experience-on-floating-lab.aspx<\/a><\/p>\n<p>2018 \u2013 2019: Harmful Algal Bloom (HAB) Mitigation Project (PI: Dr. Donald Anderson, Woods Hole Oceanographic Institute)<\/p>\n<hr \/>\n<p><strong>Science outreach involvement:<\/strong><\/p>\n<p>2019: Jacobs University VDI summer camp:\u00a0<a href=\"https:\/\/www.jacobs-university.de\/news\/using-holidays-study-summer-camp-jacobs-university\">https:\/\/www.jacobs-university.de\/news\/using-holidays-study-summer-camp-jacobs-university<\/a><\/p>\n<p>OCG lab blogs<\/p>\n<p>2018: <a href=\"https:\/\/www.usf.edu\/marine-science\/news\/2018\/iron-bubbles-oil-spill-troubles.aspx\">https:\/\/www.usf.edu\/marine-science\/news\/2018\/iron-bubbles-oil-spill-troubles.aspx<\/a><\/p>\n<p>2017: OCG in the lab: Ocean Chemistry (not available online anymore)<\/p>\n<p>St. Pete Science Fest: <a href=\"https:\/\/www.stpetescifest.org\/\">https:\/\/www.stpetescifest.org\/<\/a><\/p>\n<hr \/>\n<p><strong>Publications:<\/strong><\/p>\n<p><strong>Fr\u00f6hberg, N., Hollister, A., Koschinsky, A. <\/strong>(2025). Simple Automation and Volume Reduction of Voltammetric Measurements for Marine Trace Metal Speciation. <em>Electroanalysis<\/em>,\u00a037, e70060. <a href=\"https:\/\/doi.org\/10.1002\/elan.70060\">https:\/\/doi.org\/10.1002\/elan.70060<\/a><\/p>\n<p><strong>Hollister, A.<\/strong>, Marcinek, S., Schmidt, K., Omanovi\u0107, D., <strong>Schulte, M.<\/strong>, &amp;<strong> Koschinsky, A. <\/strong>(2024). First indication of platinum input into the southern North Sea via German Rivers.\u00a0<em>Marine Chemistry, 104439.<\/em><a href=\" https:\/\/doi.org\/10.1016\/j.marchem.2024.104439 \"> https:\/\/doi.org\/10.1016\/j.marchem.2024.104439 <\/a><\/p>\n<p>de Carvalho, L. M.; <strong>Hollister, A.P.<\/strong>, Trindade, C.; Gledhill, M. and Koschinsky, A. (2021) Distribution and size fractionation of nickel and cobalt species along the Amazon estuary and mixing plume. <em>Marine Chemistry 236: 104019<\/em>.\u00a0<a href=\"https:\/\/doi.org\/10.1016\/j.marchem.2021.104019\">https:\/\/doi.org\/10.1016\/j.marchem.2021.104019<\/a><\/p>\n<p><strong>Hollister, A. P.<\/strong>; Whitby, H.; Seidel, M.; Lodeiro, P.; Gledhill, M.; Koschinsky, A. (2021) Dissolved concentrations and organic speciation of copper in the Amazone estuary and mixing plume. <em>Marine Chemistry 234: 104005. <\/em><a href=\"https:\/\/doi.org\/10.1016\/j.marchem.2021.104005\">doi:\u00a010.1016\/j.marchem.2021.104005<\/a><\/p>\n<p><strong>Hollister, A. P.<\/strong>; Kerr, M.; Malki, K.; Muhlbach, E.; Robert, M.; Tilney, C. L.; Breitbard, M.; Hubbard, K. A. and Buck, K. N. (2020) Regeneration of macronutrients and trace metals during phytoplankton decay: an experimental study. <em>Limnology &amp; Oceanography 1-20. <\/em>doi: <a href=\"https:\/\/aslopubs.onlinelibrary.wiley.com\/doi\/full\/10.1002\/lno.11429\">10.1002\/lno.11429<\/a><\/p>\n<p>For coauthored publications prior to my Master\u2019s work, refer to my Google Scholar profile: <a href=\"http:\/\/tinyurl.com\/Hollister-Scholar\">http:\/\/tinyurl.com\/Hollister-Scholar<\/a><\/p>\n<p><strong><em>\u00a0<\/em><\/strong><\/p>\n<p><strong>Conference presentations: <\/strong><\/p>\n<ul>\n<li><strong>Hollister, A. P.,\u00a0<\/strong>Koschinsky, A., Gledhill, M. Dissolved concentrations and organic speciation of Cu in the Amazon River estuary and mixing plume. <strong>Talk<\/strong>. Ocean Sciences Meeting, <strong>2020<\/strong>, San Diego, USA.<\/li>\n<li><strong>Hollister, A.P., <\/strong>Buck, K. N., Hubbard, K., Robert, M., Tilney, C. L., Schlosser, C., Gledhill, M., Koschinsky, A. An Experimental Study of Trace Metal Regeneration and Implications for the Amazon River Estuary. <strong>Poster<\/strong>. Goldschmidt, <strong>2019<\/strong>, Barcelona, Spain.<\/li>\n<li><strong>Hollister, A. P., <\/strong>Palmer, K., Robert, M., Tilney, C., Breitbart, M., Djurhuus, A., Hubbard, K., Buck, K. Remineralization of trace metals and macronutrients from natural phytoplankton assemblages, <em>pseudo-nitzschia dolorosa<\/em> and <em>Karenia brevis.<\/em> Aquatic Sciences meeting (ASLO), <strong>2019<\/strong>, San Juan, PR, USA.<\/li>\n<li><strong>Hollister, A. P.,<\/strong> Buck, K. N. Mapping Marine Trace Metal and Macronutrient Remineralization Following a Phytoplankton Bloom. <strong>Poster<\/strong>. Southeastern Biogeochemistry Symposium,\u00a0 <strong>2018<\/strong>, Tallahassee, FL, USA.<\/li>\n<li><strong>Hollister, A. P., <\/strong>Buck, K. N. Riding the Ferrous Wheel: A Study in Marine Iron Remineralization. <strong>Poster.<\/strong> American Chemical Society (ACS) Florida Section Meeting and Exposition (FAME), <strong>2017<\/strong>, Tampa, FL, USA.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"1191\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon1-768x1024.jpg\" alt=\"\" class=\"wp-image-1191\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon1-768x1024.jpg 768w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon1-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"1192\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon2-1024x768.jpg\" alt=\"\" class=\"wp-image-1192\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon2-1024x768.jpg 1024w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon2-300x225.jpg 300w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Amazon2-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"1193\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Azores-1024x768.jpg\" alt=\"\" class=\"wp-image-1193\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Azores-1024x768.jpg 1024w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Azores-300x225.jpg 300w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/Azores-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"1194\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/CTD-1024x768.jpg\" alt=\"\" class=\"wp-image-1194\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/CTD-1024x768.jpg 1024w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/CTD-300x225.jpg 300w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/CTD-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"643\" height=\"482\" data-id=\"1195\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/filtering.jpeg\" alt=\"\" class=\"wp-image-1195\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/filtering.jpeg 643w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/filtering-300x225.jpeg 300w\" sizes=\"auto, (max-width: 643px) 100vw, 643px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"643\" height=\"482\" data-id=\"1196\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/meteor.jpeg\" alt=\"\" class=\"wp-image-1196\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/meteor.jpeg 643w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/meteor-300x225.jpeg 300w\" sizes=\"auto, (max-width: 643px) 100vw, 643px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"1197\" src=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/sunset-1024x768.jpg\" alt=\"\" class=\"wp-image-1197\" srcset=\"https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/sunset-1024x768.jpg 1024w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/sunset-300x225.jpg 300w, https:\/\/andrea-koschinsky.org\/wp-content\/uploads\/2021\/10\/sunset-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>","protected":false},"excerpt":{"rendered":"<p>Research interests: Trace metals and organic matter in the Amazon and Par\u00e1 River estuary and mixing plume, specifically: Copper (Cu) speciation and Cu-binding organic ligands along the estuary salinity gradient Nickel (Ni) and cobalt (Co) speciation and concentrations in surface<\/p>","protected":false},"author":4,"featured_media":0,"parent":72,"menu_order":40,"comment_status":"closed","ping_status":"closed","template":"","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-364","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/comments?post=364"}],"version-history":[{"count":36,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/364\/revisions"}],"predecessor-version":[{"id":3678,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/364\/revisions\/3678"}],"up":[{"embeddable":true,"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/pages\/72"}],"wp:attachment":[{"href":"https:\/\/andrea-koschinsky.org\/pt\/wp-json\/wp\/v2\/media?parent=364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}