Positive feedbacks between increased connectivity and loss of resources are recognized as potential landscape-scale factors driving degradation and desertification in semiarid regions. Common dryland vegetation models exhibit bistability as the result of different mechanisms yielding local positive feedbacks that reinforce the persistence and growth of vegetation patches, with an unstable equilibrium for vegetation separating the stable equilibria of vegetated and desert states. The existence of bistability allows for abrupt transitions between the alternative stable states, the so called catastrophic shifts, either as the result of gradual worsening of the environmental conditions or due to single or randomly distributed perturbations. Using a spatially explicit cellular automata (CA) dryland model, it has been shown that feedbacks between vegetation pattern and resource loss, measured through an index of spatial bare soil connectivity (Flowlength, FL), dramatically decrease ecosystem resilience and restoration potential. In this work, we considered mean field approximations to this CA model and other common dryland models, and showed that positive global ecohydrological feedbacks mediated by bare-soil connectivity, as captured by the expected value of the FL index, effectively decrease resilience and suffice to induce bistability in absence of additional local feedbacks. We also explored how the presence of delayed responses could affect recovery after random perturbations.
Thursday, June 17 at 02:15am (PDT)Thursday, June 17 at 10:15am (BST)Thursday, June 17 06:15pm (KST)
MS17-CBBS: Recent advances in random and deterministic modeling in biology/health sciences
Organized by: Maria C.A. Leite, (University of South Florida St.Petersburg), Juan Carlos Cortés López (Instituto Universitario de Matemática Multidisciplinar. Universitat Politècnica de València, Spain), Rafael J. Villanueva Micó (Instituto Universitario de Matemática Multidisciplinar. Universitat Politècnica de València, Spain) Note: this minisymposia has multiple sessions. The second session is MS11-CBBS.
- Francisco Rodríguez (Dept. of Applied Mathematics and Multidisciplinary Institute for Environmental Studies (IMEM), University of Alicante, Spain) "Ecohydrological feedbacks, delay responses and random perturbations in mean field dryland vegetation models"
- Sandra Delgadillo (Universidad Autónoma de Aguascalientes, México) "Full probabilistic analysis of random first-order linear differential equations with Dirac delta impulses (Pre-recorded)"
- Carlos A. Braumann (Department of Mathematics & CIMA, Universidade de Évora, Portugal) "Harvesting optimization in a randomly varying environment"
- Roberto Ku-Carrillo (Universidad Autónoma de Aguascalientes, Mexico) "On a linear random differential equation with periodic harvesting and migration"
MS17-CDEV: Mathematical approaches to vascular biology
Organized by: Jessica Crawshaw (The University of Melbourne, Australia), James Osborne (The University of Melbourne, Australia), Lowell Edgar (The University of Edinburgh, Scotland) Note: this minisymposia has multiple sessions. The second session is MS18-CDEV.
- Alys Clark (The University of Auckland, New Zealand) "What drives vascular remodelling in the uterus in pregnancy? Vascular adaptions to elevated blood flow."
- Richard Clarke (The University of Auckland, New Zealand) "Understanding the mechanical impact of the endothelial glycocalyx’s microstructure"
- Michael Watson (The University of Sydney, Australia) "A Multiphase Model of Cap Formation in the Atherosclerotic Plaque"
- Fabian Spill (The University of Birmingham, England) "Organisation and dynamics of the microvasculature"
MS17-DDMB: Image Analysis and Machine Learning for Bio-Medical Applications
Organized by: Amit Roy-Chowdhury (University of California, Riverside), G. Venugopala Reddy (University of California, Riverside) Note: this minisymposia has multiple sessions. The second session is MS16-DDMB.
- Henrik Jonsson (Cambridge Sainsbury Laboratories, UK) "Integration of live imaging and spatial modelling in plant development"
- Anuradha Kar (ENS-Lyon, CNRS, France) "Deep learning for cellular segmentation in 3D confocal images"
- Richard Smith (Univ of Koln, Germany and John Innes Center, Norwich, UK) "Quantifying life on surfaces with MorphoGraphX"
- Albert Do (University of California, Riverside) "Multiscale modeling of the Arabidopsis shoot meristem signaling network"
MS17-ECOP: Translational effects of trait changes in aquatic ecosystems
Organized by: Hanna Schenk (German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Leipzig University, Germany), Michael Raatz (Max Planck Institute for Evolutionary Biology, Germany)
- Ken H. Andersen (Center for Ocean Life, Natl. Inst. of Aquatic Resources, Technical University of Denmark, Denmark) "Using size-spectrum models to address global food security"
- Andrea Campos Candela (The Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Germany) "Towards a mechanistic understanding of phenotypic trait changes, adaptive behaviour and life history based on dynamic energy budgets"
- Maite Erauskin-Extramiana (AZTI BRTA, Spain) "The influence of climate change and fishing pressure in global top predator abundance and body size in the future"
- Hanna Schenk (German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; Leipzig University, Germany) "Optimal harvest of evolving fish"
MS17-EVOP: Recent developments in phylogenetic network reconstruction and beyond
Organized by: Guillaume Scholz (University of Leipzig, Germany), Katharina Huber (University of East Anglia, United Kingdom) Note: this minisymposia has multiple sessions. The second session is MS11-EVOP.
- Steven Kelk (Maastricht University, The Netherlands) "Quantifying the dissimilarity of trees using phylogenetic networks and data reduction"
- Mike Steel (University of Canterbury, New Zealand) "Ranked tree-child networks"
- Marc Hellmuth (Stockholm University, Sweden) "From modular decomposition trees to rooted median graphs"
- Barbara Holland (University of Tasmania, Australia) "Modelling convergence and divergence of species in phylogenetic networks"
MS17-IMMU: Intravital imaging in immunology: experimental and computational approaches
Organized by: Barun Majumder (University of Tennessee, USA), Soumen Bera (University of Tennessee, USA) Note: this minisymposia has multiple sessions. The second session is MS18-IMMU.
- Joost Beltman (Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, The Netherlands, The Netherlands) "Quantifying the role of T cells in tumor control through computational modeling"
- Sachie Kanatani (Johns Hopkins Bloomberg School of Public Health, USA) "Comparative intravital imaging of human and rodent malaria sporozoites"
- Irina Grigorova (University of Michigan Medical School, USA) "Studying the role of CCL3 in the interactions between Germinal Center B cells and follicular regulatory T cells"
- Barun Majumder (Department of Microbiology, University of Tennessee Knoxville, USA) "Correlation between speed and turning naturally arises for sparsely sampled cell movements"
MS17-MEPI: Modelling the transmission of COVID-19 in indoor spaces
Organized by: Raquel González Fariña (Cardiff University, United Kingdom), Katerina Kaouri (Cardiff University, United Kingdom)
- Christian Kähler (Universität der Bundeswehr München, Germany) "From droplets to pandemic – how to prevent SARS-CoV-2 infections via droplets and aerosols"
- Chenfeng Li (Swansea University, United Kingdom) "CFD simulation of airborne virus transmission aided by a machine learning surrogate model"
- Simon Parker (Defence Science and Technology Laboratory, United Kingdom) "Transmission of virus in carriages - development of a multiroute viral exposure model for public transport"
- Raquel González Fariña (Cardiff University, United Kingdom) "Predicting the spatiotemporal risk of airborne infection in indoor spaces using an advection-diffusion-reaction equation"
MS17-MMPB: Aggregation - Growth - Fragmentation Phenomena arising in biology
Organized by: Magali Tournus (Ecole Centrale Marseille, France), Marie Doumic (INRIA Paris, France), Miguel Escobedo (Universidad del País Vasco, Spain)
- Thomas C T Michaels (Department of Physics and Astronomy, University College London, UK) "Spatiotemporal control of filamentous protein aggregation"
- Alex Watson (University College London, UK) "Growth-fragmentation and quasi-stationary methods"
- Wei-Feng Xue (School of Biosciences, University of Kent, UK) "The division of amyloid fibrils – Experimental analysis and future challenges"
- Magali Tournus (Ecole Centrale Marseille, France) " Recovering the parameters of the fragmentation equation"
MS17-NEUR: Recent advances in mathematical neuroscience: cortically inspired models for vision and synaptic plasticity
Organized by: Luca Calatroni (Laboratoire I3S, CNRS, UCA & Inria Sophia Antipolis Méditerranée, France), Mathieu Desroches (MathNeuro Project-Team, Inria Sophia Antipolis Méditerranée & Université Côté d’Azur, France), Valentina Franceschi (Dipartimento di Matematica, Università degli Studidi Padova, Italy), Dario Prandi (Université Paris-Saclay, CNRS, CentraleSupélec, L2S, France) Note: this minisymposia has multiple sessions. The second session is MS05-NEUR.
- Marcelo Bertalmío (Spanish National Research Council (CSIC), Spain) "Evidence for the intrinsically nonlinear nature of receptive fields in vision"
- Emre Baspinar (CNRS/NeuroPSI, France) "A biologically-inspired model for Poggendorff type illusions"
- Rasa Gulbinaite (Netherlands Institute for Neuroscience, The Netherlands) "Resonance frequencies in the visual cortex and illusory perception"
- Ludovic Sacchelli (LAGEPP, Université Claude Bernard Lyon 1 (UCBL), France) "Cortical-inspired sound processing: hearing with the visual cortex"