[All-postdocs] Bioseminar TUESDAY - Julia Huggins

[Ana M Velez]

This is an extra Bioseminar next week. There is still another planned for Thursday as usual.

Woods Hole Oceanographic Institution
Biology Department Seminar
Tuesday, December 5, 2023 - 12:00 Noon

Julia Huggins
Postdoctoral Researcher, University of British Columbia, Vancouver, Canada

Microbially-Driven Shifts in Marine Nutrient Cycling in Response to Ocean Deoxygenation and Climate Change
The oceans are currently losing dissolved oxygen (O2) as a result of climate change and human activity, which may have dramatic effects on biodiversity and global climate feedbacks. As O2 is depleted to near-anoxia in pelagic marine environments, microorganisms shift from aerobic respiration to anaerobic nitrogen-based metabolisms. Most conceptual and numerical models assume this shift will lead to nitrogen loss, but it can also lead to nitrogen retention depending on which microbial metabolism(s) engage. The controls regulating the relative activity and variability of these metabolisms remain uncertain, however, and this confounds our efforts to predict how the marine nitrogen cycle responds to deoxygenation and impacts other marine biogeochemical cycles. I conduct experiments with live marine microbial communities to measure how different nitrogen-based microbial metabolisms are regulated in the transition from oxic to anoxic conditions. I use a combination of stable nitrogen isotopes (15N) and bioinformatics technologies to increase our knowledge of how competing microbial metabolisms are regulated under variable environmental conditions and unstable resource availability. My work has implications for our biogeochemical models that predict ocean deoxygenation and related climate feedbacks.

HYBRID! In person: Redfield Auditorium Zoom: https://whoi-edu.zoom.us/j/92270689921<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.google.com%2Furl%3Fq%3Dhttps%3A%2F%2Fwhoi-edu.zoom.us%2Fj%2F92270689921%26sa%3DD%26source%3Dcalendar%26ust%3D1700938374873239%26usg%3DAOvVaw12AeLRNt_o3XIdrC5vE40b&data=05%7C01%7Call-postdocs%40whoi.edu%7C33e6b217572f41052b8808dbf1d60823%7Cd44c5cc6d18c46cc8abd4fdf5b6e5944%7C0%7C0%7C638369674081176377%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=vsO%2FA7WDNIhiTQmyuUk76NPS1K6ZUXrr3GibdZTCke0%3D&reserved=0> Meeting ID: 922 7068 9921 By phone: Find your local number: https://whoi-edu.zoom.us/u/acKR1TbYcS<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.google.com%2Furl%3Fq%3Dhttps%3A%2F%2Fwhoi-edu.zoom.us%2Fu%2FacKR1TbYcS%26sa%3DD%26source%3Dcalendar%26ust%3D1700938374873239%26usg%3DAOvVaw3EMIx5PO_IyVuyO1ms0O44&data=05%7C01%7Call-postdocs%40whoi.edu%7C33e6b217572f41052b8808dbf1d60823%7Cd44c5cc6d18c46cc8abd4fdf5b6e5944%7C0%7C0%7C638369674081176377%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=a0aL8SroHWJeI9bIqv%2FOGIbkiVVaiXi47M%2BsDh7Fi%2BQ%3D&reserved=0>

For questions, contact:

Ana María Vélez
Administrative Associate
[signature_1005462319]
O: 508.289.2334
E: ana.velez at whoi.edu<mailto:ana.velez at whoi.edu>
She/her

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