A5005037084- Evolution and Genetic Dynamics
- Mathematical and Theoretical Epidemiology and Ecology Models
- Evolutionary Game Theory and Cooperation
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Animal Ecology and Behavior Studies
- Ecosystem dynamics and resilience
- Marine Bivalve and Aquaculture Studies
- Marine and fisheries research
- Mathematical Biology Tumor Growth
- Species Distribution and Climate Change
- Wildlife-Road Interactions and Conservation
- Land Use and Ecosystem Services
- Animal Behavior and Reproduction
- Stochastic processes and statistical mechanics
- Plant Parasitism and Resistance
- Bacterial Genetics and Biotechnology
- Mosquito-borne diseases and control
- Microstructure and Mechanical Properties of Steels
- Coral and Marine Ecosystems Studies
- Avian ecology and behavior
- COVID-19 epidemiological studies
- Mathematical Dynamics and Fractals
- Genetic diversity and population structure
- Nonlinear Dynamics and Pattern Formation
University of California, Davis
2016-2025
University of Münster
2018-2024
Bernhard Nocht Institute for Tropical Medicine
2019-2021
Ecological Society of America
2016-2020
John Wiley & Sons (United States)
2016-2020
ThyssenKrupp (Germany)
2018-2020
Wyoming Game and Fish Department
2019
IFC Research (United Kingdom)
2018-2019
University of Duisburg-Essen
2019
bbw University of Applied Sciences
2019
Although the effects of variation between individuals within species are traditionally ignored in studies coexistence, magnitude intraspecific nature is forcing ecologists to reconsider. Compelling intuitive arguments suggest that individual may provide a previously unrecognised route diversity maintenance by blurring species-level competitive differences or substituting for niche differences. These arguments, which motivating large body empirical work, have rarely been evaluated with...
Ocean acidification, chemical changes to the carbonate system of seawater, is emerging as a key environmental challenge accompanying global warming and other human-induced perturbations. Considerable research seeks define scope character potential outcomes from this phenomenon, but crucial impediment persists. Ecological theory, despite its power utility, has been only peripherally applied problem. Here we sketch in broad strokes several areas where fundamental principles ecology have...
Understanding under what conditions interacting populations, whether they be plants, animals, or viral particles, coexist is a question of theoretical and practical importance in population biology. Both biotic interactions environmental fluctuations are key factors that can facilitate disrupt coexistence. To better understand this interplay between these deterministic stochastic forces, we develop mathematical theory extending the nonlinear permanence for systems to difference differential...
Natural populations are heterogeneous mixtures of individuals differing in physiology, morphology, and behavior. Despite the ubiquity phenotypic variation within natural populations, its effects on dynamics ecological communities not well understood. Here, we use a quantitative genetics framework to examine how predator affects outcome apparent competition between two prey species. Classical theory predicts that have reciprocally negative each other. The addition trait predation can...
Abstract We examine the impact of spatial processes on efficacy restocking in species with varying forms population or metapopulation structure. Metapopulations are classified based complexity and degree connectedness between populations. Designation effective sites requires careful attention to dynamics; populations can differ dramatically demography connectivity, they occupy vary habitat quality. Source populations, which optimal for restocking, be distinct geographically may a small...
Ecosystems are often indirectly connected through consumers with complex life cycles (CLC), in which different stages inhabit ecosystems. Using a structured consumer resource model that accounts for the independent effects of two resources on growth and reproductive rates, we show such indirect connections between ecosystems can result alternative stable states characterized by adult-dominated juvenile-dominated populations. As consequence, gradual changes ecosystem productivity or mortality...
Species that coexist in diverse natural communities interact complex ways alter each other's abundances and affect selection on traits. Consequently, predicting trait evolution may require understanding ecological evolutionary dynamics involving a number of species. In August 2016, the American Society Naturalists sponsored symposium to explore community context, focusing microevolutionary processes. Here we provide an introduction our perspectives this topic by defining context describing...
Biological invasions, including infectious disease outbreaks and biocontrol introductions, often involve small numbers of individuals arriving in spatially heterogeneous environments. Small lead to demographic stochasticity, spatial heterogeneity means that establishment success depends critically on the introduction sites movement patterns invaders. We present a general stochastic modeling framework address how determine success, population growth, rates spread. For dispersal‐limited...
Dispersal among ecological communities is usually assumed to be random in direction, or vary distance frequency species. However, a variety of natural systems and types organisms may experience dispersal that biased by directional currents gravity on hillslopes. We developed general model for competing species metacommunities evaluate the role directionally diversity, abundance, traits. In parallel, we tested microcosm experiment with protists rotifers. Both independently demonstrated...
It is an ecological truism that population persistence depends on a population's growth rate when rare. To understand the interplay between temporal correlations, spatial heterogeneity and dispersal persistence, analytic approximation for this derived partially mixing populations. Partial has two effects growth. In absence of correlations in relative fitness, greater movement to patches with, average, higher fitness increases rates. average fitnesses, lower rates enhance autocorrelations...
Understanding under what conditions populations, whether they be plants, animals, or viral particles, persist is an issue of theoretical and practical importance in population biology. Both biotic interactions environmental fluctuations are key factors that can facilitate disrupt persistence. One approach to examining the interplay between these deterministic stochastic forces construction analysis difference equations $X_{t+1}=F(X_t,\xi_{t+1})$ where $X_t \in \R^k$ represents state...
Stable coexistence relies on negative frequency-dependence, in which rarer species invading a patch benefit from lack of conspecific competition experienced by residents. In nature, however, rarity can have costs, resulting positive frequency-dependence (PFD) particularly when are rare. Many processes cause including mates, mutualist interactions, and reproductive interference heterospecifics. When become rare the community, creates vulnerability to extinction, if frequencies drop below...
Restoration strategies for native oyster populations rely on multiple sources of information, which often conflict due to time- and space-varying patterns in abundance distribution. For instance, based population connectivity disease resistance can differ, extant historical records distribution are at odds, such that the optimal strategy is unclear valuable restoration sites may be excluded from consideration. This was case Lynnhaven River subestuary lower Chesapeake Bay, deemed unsuitable...
To better understand the evolution of dispersal in spatially heterogeneous landscapes, we study difference equation models populations that reproduce and disperse a landscape consisting k patches. The connectivity patches costs are determined by $k\times k$ column substochastic matrix S, where $S_{ij}$ represents fraction dispersing individuals from patch j end up i. Given strategy is 1$ vector whose ith entry gives probability $p_i$ If all $p_i$'s same, then called unconditional; otherwise...