Intraspecific Trait Variation and its Effects on food chains Don deangelis University of Miami Coral gables, florida USa Workshop on Nonlinear Equations in Population Biology East China normal University Shanghai, china May2527,2013
Intraspecific Trait Variation and its Effects on Food Chains Don DeAngelis University of Miami Coral Gables, Florida USA Workshop on Nonlinear Equations in Population Biology East China Normal University, Shanghai, China May 25-27, 2013
Intraspecific Variation 1. Traits such as skill at foraging and investment in anti predator defense may vary among individuals within a species population. 2. Traits such as the choice of what sort of habitat to utilize can also vary among individuals of a population Here the effects of both types of variation are examined This intraspecific variation has implications for both fitness strategies within a population and food web dynamics
Intraspecific Variation 1. Traits such as skill at foraging and investment in antipredator defense may vary among individuals within a species population. 2. Traits such as the choice of what sort of habitat to utilize can also vary among individuals of a population. Here the effects of both types of variation are examined. This intraspecific variation has implications for both fitness strategies within a population and food web dynamics
. Intraspecific Variation in foraging ability predator avoidance, and other mortality risk Intraspecific variation within populations has been shown to be nearly ubiquitous in nature and to play an important role in community dynamics D I Bolnick, P. Amarasekare, M.S. Araujo, R. Burger, J M. Levine, M. Novak, V H. W. Rudolf, S.J. Schreiber, M. C Urban, and D. A Vasseur, Why intraspecific trait variation matters in community ecology, Trends Ecol. EvoL, 26: 183-192 (2011) D I Bolnick. R. Svanback, J. A Fordyce, L.H. Yang, J M. Davis, C D Hulsey, and M. L. Forister The ecology of individuals: incidence and implications of individual specialization. Amer. Natu,161:1-28(2003). M. Wolf, and F J Weissing, Animal personalities: consequences for ecology and evolution Trends in Ecol. Evol, 27: 452-461 (2012)
I. Intraspecific Variation in foraging ability, predator avoidance, and other mortality risk Intraspecific variation within populations has been shown to be nearly ubiquitous in nature and to play an important role in community dynamics: • D. I. Bolnick, P. Amarasekare, M. S. Araújo, R. Bürger, J. M. Levine, M. Novak, V. H. W. Rudolf, S. J. Schreiber, M. C. Urban, and D. A. Vasseur, Why intraspecific trait variation matters in community ecology, Trends Ecol. Evol,, 26:183-192 (2011). • D. I. Bolnick. R. Svanbäck, J. A. Fordyce, L. H. Yang, J. M. Davis, C. D. Hulsey, and M. L. Forister, The ecology of individuals: incidence and implications of individual specialization. Amer. Natur., 161:1-28 (2003). • M. Wolf, and F. J. Weissing, Animal personalities: consequences for ecology and evolution. Trends in Ecol. Evol., 27:452-461 (2012)
Basic Questions How does this intraspecific variation relate to strategies for fitness of individuals in a population Given the existence of subpopulations having distinct sets of traits or strategies within a population and that there is probably continuous switching of individuals between these subpopulations affect these dynamics?
• How does this intraspecific variation relate to strategies for fitness of individuals in a population? • Given the existence of subpopulations having distinct sets of traits or strategies within a population, and that there is probably continuous switching of individuals between these subpopulations affect these dynamics? Basic Questions
M Predator To investigate trait variation, fN,M fN,M we consider a tri-trophic chain of resource r consumer N, and predator M onsumer 1 The consumer is assumed to m2 n2 have two phenotype subpopulations( with different strategies) and there is some switching back a,RN1 2RN2 and forth between the two
M Predator N1 Consumer 1 N2 Consumer 2 R Resource a2RN2 a1RN1 f2N2M f1N1M m12N1 m21N2 To investigate trait variation, we consider a tri-trophic chain of ‘resource R’, ‘consumer N’, and ‘predator M’ The consumer is assumed to have two phenotype subpopulations (with different strategies) and there is some switching back and forth between the two