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BEGIN:VEVENT
CATEGORIES:Lectures and Seminars,SMAST,SMAST Seminar Series
DESCRIPTION:Seminar AnnouncementDepartment of Estuarine and Ocean Sciences 
 "Limitations and controls of nitrogen fixing microbes in coastal North Atl
 antic"Dr. Pia MoisanderProfessor, Biology and Estuarine and Ocean Sciences
 , UMassD Wednesday, October 21, 202612:30 - 1:30 pmSMAST E 101-103 and via
  Zoom Abstract: Biological nitrogen fixation is an assimilatory process in
  which certain bacteria and archaea (diazotrophs) reduce dinitrogen gas to
  biologically available ammonia. The process is important in marine enviro
 nments where nitrogen limitation prevails. Classically, nitrogen fixation 
 in marine environments has been attributed to cyanobacteria, but recent re
 search shows a great diversity and prevalence of non-cyanobacterial diazot
 rophs (NCDs). The environmental controls and limitations of marine diazotr
 ophs remain elusive. In this talk I will discuss our recent studies on div
 ersity and environmental limitations of cyanobacterial and non-cyanobacter
 ial diazotrophs in coastal New England. I will first discuss characterizat
 ion and phosphorus limitation in a benthic, bloom-forming cyanobacterial d
 iazotroph Hydrocoleum sp. on Nantucket Island. I will then discuss diazotr
 oph distributions in Buzzards Bay over a decadal scale, demonstrating seas
 onal filtering of communities, largely driven by the prevalence and season
 al variability in the cyanobacterial UCYN-A. Finally, I'll discuss potenti
 al metabolic strategies of NCDs based on metagenome assembled genomes we'v
 e enriched from Buzzards Bay. Understanding the environmental controls and
  limitations of marine nitrogen fixing microbial communities allows assess
 ment of their importance in the global nitrogen cycle. Join Meetinghttps:/
 /umassd.zoom.us/j/97440069270Note: Meeting ID and passcode required, email
  contact to obtain For additional information, please contact Callie Rumbu
 t at c.rumbut@umassd.edu\nEvent page: https://www.umassd.edu/events/cms/10
 -21-26-limitations-and-controls-of-nitrogen-fixing-microbes.php\nEvent lin
 k: https://umassd.zoom.us/j/97440069270
X-ALT-DESC;FMTTYPE=text/html:<html><body><p>Seminar Announcement<br>Departm
 ent of Estuarine and Ocean Sciences</p>\n<p>"Limitations and controls of n
 itrogen fixing microbes in coastal North Atlantic"<br>Dr. Pia Moisander<br
 >Professor\, Biology and Estuarine and Ocean Sciences\, UMassD</p>\n<p>Wed
 nesday\, October 21\, 2026<br>12:30 - 1:30 pm<br>SMAST E 101-103 and via Z
 oom</p>\n<p>Abstract:</p>\n<p>Biological nitrogen fixation is an assimilat
 ory process in which certain bacteria and archaea (diazotrophs) reduce din
 itrogen gas to biologically available ammonia. The process is important in
  marine environments where nitrogen limitation prevails. Classically\, nit
 rogen fixation in marine environments has been attributed to cyanobacteria
 \, but recent research shows a great diversity and prevalence of non-cyano
 bacterial diazotrophs (NCDs). The environmental controls and limitations o
 f marine diazotrophs remain elusive.</p>\n<p>In this talk I will discuss o
 ur recent studies on diversity and environmental limitations of cyanobacte
 rial and non-cyanobacterial diazotrophs in coastal New England. I will fir
 st discuss characterization and phosphorus limitation in a benthic\, bloom
 -forming cyanobacterial diazotroph Hydrocoleum sp. on Nantucket Island. I 
 will then discuss diazotroph distributions in Buzzards Bay over a decadal 
 scale\, demonstrating seasonal filtering of communities\, largely driven b
 y the prevalence and seasonal variability in the cyanobacterial UCYN-A. Fi
 nally\, I'll discuss potential metabolic strategies of NCDs based on metag
 enome assembled genomes we've enriched from Buzzards Bay. Understanding th
 e environmental controls and limitations of marine nitrogen fixing microbi
 al communities allows assessment of their importance in the global nitroge
 n cycle.</p>\n<p>Join Meeting<br><a href="https://umassd.zoom.us/j/9744006
 9270">https://umassd.zoom.us/j/97440069270</a><br>Note: Meeting ID and pas
 scode required\, email contact to obtain</p>\n<p>For additional informatio
 n\, please contact Callie Rumbut at c.rumbut@umassd.edu</p><p>Event page: 
 <a href="https://www.umassd.edu/events/cms/10-21-26-limitations-and-contro
 ls-of-nitrogen-fixing-microbes.php">https://www.umassd.edu/events/cms/10-2
 1-26-limitations-and-controls-of-nitrogen-fixing-microbes.php</a><br>Event
  link: <a href="https://umassd.zoom.us/j/97440069270">https://umassd.zoom.
 us/j/97440069270</a></p></body></html>
DTSTAMP:20261014T150806
DTSTART;TZID=America/New_York:20261021T123000
DTEND;TZID=America/New_York:20261021T133000
LOCATION:SMAST East 101-103
SUMMARY;LANGUAGE=en-us:Limitations and controls of nitrogen fixing microbes
  in coastal North Atlantic
UID:42162acc7f601693c95602116980d937@www.umassd.edu
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