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SUMMARY:Consumer-Resource Model for species coexistence
DTSTART:20260427T133000Z
DTEND:20260427T153000Z
DTSTAMP:20260430T170700Z
UID:indico-event-9653@indico.fysik.su.se
DESCRIPTION:Speakers: Deepak Gupta (Technische Universität Berlin)\n\nSpe
 cies in an ecological community with similar characteristics often compete
  with each other for available nutrients/resources. The Competition Exclus
 ion Principle (CEP) predicts that the fittest species outcompetes the othe
 rs to survive. MacArthur’s consumer-resource model successfully explain
 s the validity of this competitive exclusion principle\, i.e.\, the number
  of coexisting species competing for available resources is bounded by the
  number of resources themselves. On the contrary\, we still observe rich b
 iodiversity\, where several species coexist in nearby regions. So far\, se
 veral explanations via different modeling techniques have been proposed to
  understand this rich biodiversity\, but a definite answer in this directi
 on is still not available. In this talk\, I will introduce an effective re
 source competition model for species coexistence that is obtained by perfo
 rming spatial coarse-graining. With this new model\, I will show how many 
 species can coexist and violate CEP. Our analytical calculations and numer
 ical simulations correctly predict the empirical species abundance distrib
 ution (SAD) of the plankton community data. In the second part of my talk
 \, I will discuss our recent results discussing how biodiversity is influe
 nced by the presence of environmental fluctuations. By applying the dynami
 cal mean field theory (DMFT)\, I will show the effective mean field equati
 ons for species competing for resources. These mean field equations correc
 tly predict the empirical SAD and many other features.\nG. Hardin\, The co
 mpetitive exclusion principle\, Science 131\, 1292 (1960). \nP. Chesson\
 , Macarthur’s consumer-resource model\, Theor. Popul. Biol. 37\, 26 (19
 90).\nG. E. Hutchinson\, The paradox of the plankton\, Am. Nat. 95\, 137 (
 1961).\nA. Posfai\, T. Taillefumier\, and N. S. Wingreen\, Metabolic Trade
 -Offs Promote Diversity in a Model Ecosystem\, Phys. Rev. Lett. 118\, 028
 103 (2017). \nS. Roy and J. Chattopadhyay\, The stability of ecosystems: 
 A brief overview of the paradox of enrichment\, J. Biosci. 32\, 421 (2007
 ).\n D. Gupta\, S. Garlaschi\, S. Suweis\, S. Azaele\, and A. Maritan\, E
 ffective Resource-Competition Model for Species Coexistence\, Phys. Rev. L
 ett. 127\, 208101 (2021).\nD. Zanchetta\, D. Gupta\, S. Moschin\, S. Suwe
 is\, A. Maritan\, and S. Azaele\, Emergence of ecological structure and sp
 ecies rarity from fluctuating metabolic strategies. PRX Life\, 3\, 033016
  (2025).\nzoom : https://stockholmuniversity.zoom.us/j/622224375\n\nhttps:
 //indico.fysik.su.se/event/9653/
LOCATION:Albano 3: 6228 - Mega (22 seats) (Albano Building 3)
URL:https://indico.fysik.su.se/event/9653/
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