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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-1026@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20250617T110000
DTEND;TZID=Europe/Paris:20250617T120000
DTSTAMP:20250505T144652Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-daniel-amor-ens-2/
SUMMARY:Séminaire du LPTMS : Daniel Amor (ENS) - Salle des séminaires du 
 FAST et du LPTMS\, bâtiment Pascal n°530 - 17 Juin 25 11:00
DESCRIPTION:Community transitions and the emergence of alternative stable s
 tates in microbial systems\nDaniel Amor (ENS)\nMicrobial communities often
  face external perturbations that can induce lasting changes in their comp
 osition and functions. Responses to such perturbations can drive community
  functions\, including host health\, which urges for predictive understand
 ing of community dynamics following perturbations. First in this talk\, I 
 will present our work addressing how perturbations can induce transitions 
 between alternative stable states of a simple experimental community. For 
 the case of antibiotic perturbations\, I will address how bacterial growth
  dynamics can overcome differences in antibiotic susceptibility and determ
 ine the community outcome of antibiotic exposure. Combining theory and exp
 eriments\, we demonstrated that differences in the growth rates of communi
 ty members can determine the resilience of stable community states against
  several antibiotics\, a result that holds with relative independence of d
 ifferences in antibiotic susceptibility. As our understanding of response 
 to perturbations in simple communities was growing\, we faced a classical 
 question in ecology: how does community complexity impact stability and dy
 namics? We addressed this question by assembling experimental communities 
 under a large range of species pools\, controlling both identity and numbe
 r of community members\, and a range of environments\, controlling the ave
 rage interaction strength between community members. These experiments con
 stitute the first empirical demonstration of complexity-driven transitions
  between three generic phases of community dynamics predicted by ecologica
 l theory.
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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TZID:Europe/Paris
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DTSTART:20250330T030000
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