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SUMMARY:Plenary Lecture 17: Micro-scale biological interactions shape micr
 obial community dynamics on marine particles - Cordero\, O (ETH Zrich)
DTSTART:20140912T105500Z
DTEND:20140912T113000Z
UID:TALK54191@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Particulate organic matter in aquatic environments represents 
 a major source of nutrients for heterotrophic bacteria. To access these nu
 trients microbial communities need to assemble on particles and\, once the
  ecological opportunity expires\, disassemble to start migration and colon
 ization of new nutrient sources. Because of the enormous diversity of micr
 obes in the environment\, this process is likely to involve a large number
  of species interacting at different points during assembly and disassembl
 y. Using a model system based on chitin-associated communities from the co
 astal ocean\, I will discuss ongoing work aimed at studying community asse
 mbly on particles as the behavior of a multi-species system\, which we att
 empt to reconstruct with a combination of computational and experimental t
 ools. Our results show that community assembly on chitin involves the fast
  succession of a large number of species. These complex dynamics are not d
 riven by changes in substrates\, but by local biological interactions and 
 ecological trade-offs which structure communities at micro-meter scales. O
 verall\, this study shows that ecological interactions impose strong selec
 tive pressures on particle-attached communities and in that micro-scale ec
 ological processes can have a large impact on global ecosystem processes.\
 n
LOCATION:Seminar Room 1\, Newton Institute
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