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DTSTAMP:20250117T103736
DTSTART;TZID=America/Detroit:20241004T153000
DTEND;TZID=America/Detroit:20241004T170000
SUMMARY:Workshop / Seminar:Interdisciplinary Workshop in Race\, Ethnicity and Politics
DESCRIPTION:Racial and ethnic identities play a key role in shaping behaviors\, attitudes\, institutions and social structures. As such\, scholars across disciplines have been devoted to investigating how race and ethnicity feature in every aspect of social and political life. The purpose of I-REP (Interdisciplinary Workshop in Race\, Ethnicity and Politics) is to provide a space for scholars whose research centers race\, ethnicity and politics across a number of fields to receive critical feedback on the early stages of their work (especially graduate students)\, build community with other researchers who share similar interests and offer an opportunity for participants to collaborate on a joint research project within the working group.
UID:112497-21857417@events.umich.edu
URL:https://events.umich.edu/event/112497
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Department Of Political Science,Political Science
LOCATION:Haven Hall - 5769 Pre-Function
CONTACT:
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DTSTAMP:20240926T164621
DTSTART;TZID=America/Detroit:20241004T153000
DTEND;TZID=America/Detroit:20241004T163000
SUMMARY:Lecture / Discussion:Smith Lecture - Christopher Francis\, Stanford University
DESCRIPTION:Ammonia-oxidizing archaea (AOA) carry out key transformations of ammonia in estuarine systems such as San Francisco Bay (SFB)—the largest estuary on the west coast of North America—and play a significant role in both local and global nitrogen cycling. Using metagenomics and 16S rRNA gene amplicon sequencing\, we found that AOA are more abundant than ammonia-oxidizing bacteria and nitrite-oxidizing bacteria\, except in the freshwater stations in SFB. Surprisingly\, in South SFB we observed recurrent AOA blooms of “Candidatus Nitrosomarinus catalina” SPOT01-like organisms\, which account for over 20% of the overall microbial community and co-occur with weeks of high nitrite concentrations (>10 μM) in the oxic water column. We also observed pronounced nitrite peaks occurring in the autumn for 7 of the last 9 years\, suggesting that seasonal AOA blooms are common in South SFB. To carefully examine the dynamics and activity of nitrifying microorganisms over the course of an AOA bloom in South SFB\, we measured nitrification rates\, quantified AOA abundance\, and analyzed both metagenomic and metatranscriptomic data during the autumn of 2018 and seasonally throughout 2019. Overall\, our study confirms that AOA are not only abundant but also highly active during blooms oxidizing large amounts of ammonia to nitrite—a key intermediate in the microbial nitrogen cycle—and producing reactive compounds that may impact other members of the microbial community.
UID:123383-21850840@events.umich.edu
URL:https://events.umich.edu/event/123383
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Lecture
LOCATION:1100 North University Building - 1528
CONTACT:
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