A5053640928- Evolution and Genetic Dynamics
- Evolutionary Game Theory and Cooperation
- Mathematical and Theoretical Epidemiology and Ecology Models
- Zoonotic diseases and public health
- Animal Disease Management and Epidemiology
- Bacteriophages and microbial interactions
- Plant and animal studies
- COVID-19 epidemiological studies
- Plant Virus Research Studies
- Animal Ecology and Behavior Studies
- Species Distribution and Climate Change
- Botanical Research and Chemistry
- Ecology and Vegetation Dynamics Studies
- Plant and fungal interactions
- Ecosystem dynamics and resilience
- Viral Infections and Vectors
- Marine and fisheries research
- Optimism, Hope, and Well-being
- Vaccine Coverage and Hesitancy
- Policing Practices and Perceptions
- Fish Ecology and Management Studies
- Avian ecology and behavior
- Methane Hydrates and Related Phenomena
- Prion Diseases and Protein Misfolding
- Physiological and biochemical adaptations
Florida State University
2018-2024
University of the City of Manila
2022
Cook County Sheriff's Office
2022
Utah State University
2015-2020
Bridge University
2018-2019
Ecological Society of America
2018
John Wiley & Sons (United States)
2018
Georgia Institute of Technology
2012-2014
Cornell University
2010
The University of Texas at Austin
2007
Significance The abundances of predators and their prey can oscillate in time. Mathematical theory predator–prey systems predicts that cycles, peaks abundance precede predator abundance. However, these models do not consider how the evolution traits related to offense defense will affect ordering timing peaks. Here we show coevolution effectively reverse i.e., We present examples from three distinct exhibit reversed suggesting may be an important driver cycles those systems.
The accumulation of evidence that ecologically important traits often evolve at the same time and rate as ecological dynamics (e.g., changes in species’ abundances or spatial distributions) has outpaced theory describing interplay between evolutionary processes with comparable timescales. disparity experiment is partially due to high dimensionality models include both dynamics. Here we show how fast‐slow dynamical systems can be used reduce model dimension, use body study a general...
A hydra effect occurs when the mean density of a species increases in response to greater mortality. We show that, stable multispecies system, exhibits only if maintaining that at its equilibrium destabilizes system. The stability original system is due responses hydra-effect changes other species' densities. If dynamical feedback removed by fixing species, large community make-up (including possibility extinction) can occur. This general result has several implications: (1) Hydra effects...
Abstract The prevailing paradigm in ecological studies of viruses and their microbial hosts is that the reproductive success depends on proliferation ‘predator’, is, virus particle. Yet, are obligate intracellular parasites, genome—the actual unit selection—can persist proliferate from one cell generation to next without lysis or production new particles. Here, we propose a theoretical framework quantify invasion fitness using an epidemiological cell-centric metric focuses viral genomes...
Evolution can alter the stability and dynamics of ecological communities; for example, prey evolution drive cyclic in predator-prey systems that are not possible absence evolution. However, it is unclear how magnitude additive genetic variation evolving species mediates those effects. In this study, I explore determines what effects has on systems. use linear analysis to decompose a general eco-evolutionary model into components representing stabilities evolutionary subsystems as well...
Ecology Letters (2011) 14: 202–209 Abstract Interspecific interactions depend not only on the population densities of interacting species, but their phenotypes as well. Phenotypic variation can be plastic or heritable and both mechanisms drive phenotypic change at rates comparable to faster than those ecological dynamics (e.g. changes in abundances spatial distributions). In this study, we compare effects rapidly induced evolving defences have community by considering fast limit using...
Pathogen transmission can involve direct and/or indirect pathways. Using theoretical models, in this study we ask, "do directly and indirectly transmitted pathogens yield different population-level epidemiological dynamics?" "can the pathway be inferred from data?" Our approach involves comparing continuous-time dynamics of a class compartmental models with versus environmentally mediated Combing analytical theory numerical simulations show that produce quantitatively similar time series...
Generalist parasites can strongly influence interactions between native and invasive species. Host competence be used to predict how an species will affect community disease dynamics; the addition of a highly competent, host is predicted increase disease. However, densities also impacts on dynamics. We examined whether information alone could accurately effects in hosts. first characterized relative parasite. Next, we manipulated composition mesocosms found that results did not While was...
Abstract Evolution can alter the ecological dynamics of communities, but effects depend on magnitudes standing genetic variation in evolving species. Using an eco‐coevolutionary predator–prey model, I identify how prey and predator determine when ecological, evolutionary, eco‐evolutionary feedbacks influence system stability phase lags cycles. Here, are defined by subsystems, i.e., a subset components whole other held fixed; (evolutionary) involve direct indirect between population densities...
Organisms are frequently coinfected by multiple parasite strains and species, interactions between parasites within hosts known to influence prevalence diversity, as well epidemic timing. Importantly, coinfecting can be affected the order in which they infect (i.e. within‐host priority effects). In this study, we use a single‐host, two‐pathogen, SI model with environmental transmission explore how effects scale up alter host population‐scale infection patterns. Specifically, ask changes...
Bacterial viruses, that is 'bacteriophage' or 'phage', can infect and lyse their bacterial hosts, releasing new viral progeny. In addition to the lytic pathway, certain bacteriophage (i.e. 'temperate' bacteriophage) also initiate lysogeny, a latent mode of infection in which genome integrated into replicated with chromosome. Subsequently, genome, 'prophage', induce restart pathway. Here, we explore relationship among mode, ecological context, fitness, essence asking: when should viruses be...
Biodiversity in communities is changing globally, including the gain and loss of host species host-pathogen communities. Increased diversity can cause infection prevalence a focal to increase (amplification) or decrease (dilution). However, it unclear what general rules govern context-dependent effects, part because theories for pathogens with different transmission modes have developed largely independently. Using two-host model, we explore how pathogen mode characteristics second (disease...
Symbionts are classified as parasites, commensals, or mutualists based on their individual-level effects host traits such mortality reproduction rates. However, the classification of symbiosis might change when focal interaction is investigated at population scale, for multiple generations, under different environmental contexts. We individual- and population-level a microsporidian, Ordospora pajunii , yeast, Metschnikowia bicuspidata key freshwater grazer Daphnia dentifera . Specifically,...
A fundamental challenge in ecology continues to be identifying mechanisms that stabilize community dynamics. By altering the interactions within a community, eco-evolutionary feedbacks may play role stability. Indeed, recent empirical and theoretical studies demonstrate these can or destabilize communities and, moreover, this sometimes depends on relative rate of ecological evolutionary processes. So far, theory how impact stability exists only for few special cases. In our work, we develop...
Most phenomenological, statistical models used to generate ecological forecasts take either a time‐series approach, based on long‐term data from one location, or space‐for‐time describing spatial patterns across environmental gradients. However, the magnitude and even sign of environment–response relationships detected using these two approaches often differs, leading contrasting predictions about responses future change. Here we consider how forecast horizon determines whether more accurate...
Using a Lotka‐Volterra model, we explore how the indirect interactions between two predators are altered by interspecific competition shared prey. We identify when different arise predators, classifying predator responses to (1) slightly increased mortality in other predator, (2) decreased population of or (3) removal predator. When prey is low, all methods predict negative effects i.e., competitive interactions. Strong and/or highly asymmetric often produces at least one positive effect...
Interspecific competition for resources is generally considered to be the selective force driving ecological character displacement, and displacement assumed reduce competition. Skeptics of prevalence often cite lack evidence The present article uses a simple model examine whether needed reduces It treats systems with competing resources, considers cases when only one consumer evolves. quantifies using several different measures. analysis shows that selection divergence consumers occurs...
Abstract There is intense interest in understanding pathogen virulence – that is, the degree of damage caused to a host by pathogen. However, despite abundant evidence effects stressors can carry across generations, studies have focused almost exclusively on single generation. Here, we describe transgenerational virulence, where parental exposure reduces offspring fitness. Daphnia microsporidian significantly reduced lifespan and fecundity offspring. The trans-generational virulent maternal...
We develop a method to identify how ecological, evolutionary, and eco-evolutionary feedbacks influence system stability. apply our nine empirically parametrized models of exploiter–victim systems from the literature which particular cause some converge steady state or exhibit sustained oscillations. find that ecological involving interactions between all species evolutionary only exploiter (predators pathogens) are typically stabilizing. In contrast, victim (prey hosts) destabilizing more...