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TZUNTIL:20190331T010000Z
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DTSTART:20161030T030000
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RDATE:20171029T030000
RDATE:20181028T030000
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UID:www.bayceer.uni-bayreuth.de-bayceer-t137493id
DTSTAMP:20260830T035736Z
DESCRIPTION:Marine microbes play a crucial role in the production and consu
 mption of climate-active gases. In our studies\, we investigate the enviro
 nmental control on two important microbial pathways leading to the product
 ion of climate-active gases in the ocean\, (i) the enzymatic hydrolysis an
 d bacterial turnover of organic matter that results in the release of CO2 
 and (ii) the formation and cycling of halogenated trace gases which play a
  significant role in present day ozone depletion.\nHeterotrophic bacteria 
 are the main producers of CO2 in the ocean\, thereby counteracting the bio
 logical drawdown of CO2 by primary production. Microbial cycling is curren
 tly hypothesized as the main source for oceanic bromocarbons\, but with li
 ttle knowledge of the underlying processes and magnitude of the biogenic s
 ources and sinks. Recently\, it has been suggested that reactive halogen s
 pecies in seawater halogenate dissolved organic matter releasing halogenat
 ed trace gases such as bromoform.\nMany enzymatic processes involved in th
 e bacterial cycling of organic compounds were shown to be temperature and 
 pH sensitive in previous studies. Due to the continuous rise in atmospheri
 c CO2 concentration\, the ocean is experiencing considerable changes in te
 mperature\, carbonate chemistry\, and pH at a rate unprecedented during th
 e last 300 million years but the consequences for microbial physiology\, o
 rganic matter cycling and marine biogeochemistry are still unresolved.\nWe
  studied microbial production and removal processes in the surface ocean d
 uring research cruises to low and high latitudes as well as during CO2-man
 ipulation studies simulating future ocean conditions. We conclude that the
  ongoing ocean acidification has the potential to stimulate the bacterial 
 community and facilitate the microbial recycling of freshly produced organ
 ic matter\, thus strengthening the role of the microbial production of cli
 mate-active gases in the surface ocean.\n*** Invited by Birgit Thies\, Bay
 CEER Office\n\nIm interaktiven Vortrag 'Traumberuf Naturwissenschaftler*in
 ' erzählt Sonja Endres am gleichen Abend um 19 Uhr im Glashaus vom Alltag 
 an Bord und beantwortet Fragen zum Karriereweg als Naturwissenschaftler*in
  (Veranstalter: Educare / Fachschaft BCG).
DTSTART;TZID=Europe/Berlin:20170629T120000
DTEND;TZID=Europe/Berlin:20170629T133000
LOCATION:H6\, GEO
SUMMARY:Dr. Sonja Endres\, Biological Oceanography\, GEOMAR Helmholtz Centr
 e for Ocean Research Kiel (Homepage): Microbial cycling of organic matter 
 and trace gases in a changing ocean
TRANSP:TRANSPARENT
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