Jeff Gore: Emergent phases of ecological diversity and dynamics mapped in microcosms

Mon, Nov 15, 2021, 12:30 pm
Location: 
Joseph Henry Room
Speaker(s): 
Sponsor(s): 
CPBF an NSF PFC

Natural ecological communities display striking features, such as high biodiversity and a wide range of dynamics, that have been difficult to explain in a unified framework. Using experimental bacterial microcosms, we have performed the first direct test of recent theory predicting that simple aggregate parameters dictate emergent behaviors of the community. As either the number of species or the strength of species interactions is increased, we show that microbial ecosystems transition between distinct qualitative dynamical phases in a predicted order, from a stable equilibrium where all species coexist, to partial coexistence, to emergence of persistent fluctuations in species abundance. Under the same conditions, high biodiversity and fluctuations allow and require each other. Our results demonstrate predictable emergent diversity and dynamics in ecological communities.

Andrew Gordus: Untangling the web of behaviors used in spider orb-weaving

Mon, Dec 6, 2021, 12:30 pm

Many innate behaviors are the result of multiple sensorimotor programs that are dynamically coordinated to produce higher-order behaviors such as...

Location: Joseph Henry Room, Jadwin Hall

Chris Wiggins, Just do the best you can: statistical physics approaches to reinforcement learning

Mon, Dec 13, 2021, 1:15 pm

The most celebrated corners of machine learning over the past decades are those successful at predicting - e.g., spam...

Location: Zoom

Madhav Mani: TBD

Mon, Jan 31, 2022, 12:30 pm
Location: Joseph Henry Room, Jadwin Hall

Zvonimir Dogic: TBD

Mon, Feb 7, 2022, 12:30 pm
Location: Joseph Henry Room

Naama Brenner: TBD

Mon, Mar 14, 2022, 12:30 pm

Na Ji: TBD

Mon, Mar 21, 2022, 12:30 pm
Location: Joseph Henry Room

Arnold Mathijssen: TBD

Mon, Mar 28, 2022, 12:30 pm
Location: Joseph Henry Room

Gijsje Koenderink: TBD

Mon, Apr 11, 2022, 12:30 pm
Location: Zoom