scholarly journals Bifurcation theory, adaptive dynamics and dynamic energy budget-structured populations of iteroparous species

2010 ◽  
Vol 365 (1557) ◽  
pp. 3579-3590 ◽  
Author(s):  
B. W. Kooi ◽  
J. van der Meer
Keyword(s):  
Energy Budget ◽  
Evolutionary Dynamics ◽  
Adaptive Dynamics ◽  
Structured Populations ◽  
Food Storage ◽  
Evolutionary Development ◽  
Life Stages ◽  
Dynamic Energy Budget ◽  
Iteroparous Species ◽  
Timing Of Spawning

In this paper, we describe a technique to evaluate the evolutionary dynamics of the timing of spawning for iteroparous species. The life cycle of the species consists of three life stages, embryonic, juvenile and adult whereby the transitions of life stages (gametogenesis, birth and maturation) occur at species-specific sizes. The dynamics of the population is studied in a semi-chemostat environment where the inflowing food concentration is periodic (annual). A dynamic energy budget-based continuous-time model is used to describe the uptake of the food, storage in reserves and allocation of the energy to growth, maintenance, development (embryos, juveniles) and reproduction (adults). A discrete-event process is used for modelling reproduction. At a fixed spawning date of the year, the reproduction buffer is emptied and a new cohort is formed by eggs with a fixed size and energy content. The population consists of cohorts: for each year one consisting of individuals with the same age which die after their last reproduction event. The resulting mathematical model is a finite-dimensional set of ordinary differential equations with fixed 1-year periodic boundary conditions yielding a stroboscopic map. We will study the evolutionary development of the population using the adaptive dynamics approach. The trait is the timing of spawning. Pairwise and mutual invasibility plots are calculated using bifurcation analysis of the stroboscopic map. The evolutionary singular strategy value belonging to the evolutionary endpoint for the trait allows for an interpretation of the reproduction strategy of the population. In a case study, parameter values from the literature for the bivalve Macoma balthica are used.

scholarly journals A general theoretical framework for trait-based eco-evolutionary dynamics: population structure, intraspecific variation, and community assembly

2021 ◽  
Author(s):  
Jonas Wickman ◽  
Thomas Koffel ◽  
Christopher A Klausmeier
Keyword(s):  
Population Structure ◽  
Intraspecific Variation ◽  
Functional Traits ◽  
Community Assembly ◽  
Evolutionary Dynamics ◽  
Resource Competition ◽  
Adaptive Dynamics ◽  
Theoretical Framework ◽  
Community Change ◽  
Structured Populations

To understand how functional traits shape ecological communities it is necessary to understand both how traits across the community affect its functioning and how eco-evolutionary dynamics within the community change the traits over time. Of particular interest are so-called evolutionarily stable communities (ESCs), since these are the end points of eco-evolutionary dynamics and can persist over long time scales. One theoretical framework that has successfully been used for assembling ESCs is adaptive dynamics. However, this framework cannot account for intraspecific variation---neither locally nor across structured populations. On the other hand, in moment-based approaches, intraspecific variation is accommodated, but community assembly has been neglected. This is unfortunate as some questions regarding for example local adaptation vis-a-vis diversification into multiple species requires both facets. In this paper we develop a general theoretical framework that bridges the gap between these two approaches. We showcase how ESCs can be assembled using the framework, and illustrate various aspects of the framework using two simple models of resource competition. We believe this unifying framework could be of great use to address questions regarding the role of functional traits in communities where population structure, intraspecific variation, and eco-evolutionary dynamics are all important.

scholarly journals Multi-morph eco-evolutionary dynamics in structured populations

2021 ◽  
Author(s):  
Sébastien Lion ◽  
Mike Boots ◽  
Akira Sasaki
Keyword(s):  
Evolutionary Dynamics ◽  
Adaptive Dynamics ◽  
Structured Populations ◽  
Ecological Feedbacks ◽  
Future Work ◽  
Practical Implications ◽  
Density Dependent Selection ◽  
Mutational Variance ◽  
Dynamics Of Populations ◽  
Adaptation Model

Our understanding of the evolution of quantitative traits in nature is still limited by the challenge of including realistic trait distributions in the context of frequency-dependent selection and ecological feedbacks. We develop a theoretical framework to analyse the dynamics of populations composed of several morphs and structured into distinct classes (e.g. age, size, habitats, infection status, species...). Our approach extends to class-structured populations a recently introduced "oligomorphic approximation" which bridges the gap between adaptive dynamics and quantitative genetics approaches and allows for the joint description of the dynamics of ecological variables and of the moments of multimodal trait distributions. We also introduce a new approximation to simplify the eco-evolutionary dynamics using reproductive values. This effectively extends Lande's univariate theorem not only to frequency- and density-dependent selection but also to multimodal trait distributions. We illustrate the effectiveness of this approach by applying it to the important conceptual case of two-habitat migration-selection models. In particular, we use our approach to predict the equilibrium trait distributions in a local adaptation model with asymmetric migration and habitat-specific mutational variance. We discuss the theoretical and practical implications of our results and sketch perspectives for future work.

scholarly journals A Dynamic Energy Budget (DEB) Model for the Keystone Predator Pisaster ochraceus

PLoS ONE ◽  
2014 ◽  
Vol 9 (8) ◽  
pp. e104658 ◽  
Author(s):  
Cristián J. Monaco ◽  
David S. Wethey ◽  
Brian Helmuth
Keyword(s):  
Energy Budget ◽  
Dynamic Energy Budget ◽  
Keystone Predator ◽  
Pisaster Ochraceus

scholarly journals Effects of polystyrene diet on Tenebrio molitor larval growth, development and survival: Dynamic Energy Budget (DEB) model analysis

2020 ◽  
Vol 264 ◽  
pp. 114740
Author(s):  
Konrad Matyja ◽  
Justyna Rybak ◽  
Beata Hanus-Lorenz ◽  
Magdalena Wróbel ◽  
Radosław Rutkowski
Keyword(s):  
Energy Budget ◽  
Larval Growth ◽  
Tenebrio Molitor ◽  
Model Analysis ◽  
Dynamic Energy Budget ◽  
Growth Development

scholarly journals Birth, School, Work, Death, and Resurrection: The Life Stages and Dynamics of Transposable Element Proliferation

Genes ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 336 ◽  
Author(s):  
Justin P. Blumenstiel
Keyword(s):  
Transposable Elements ◽  
Transposable Element ◽  
Horizontal Transfer ◽  
Evolutionary Dynamics ◽  
Evolutionary Strategies ◽  
Species Boundaries ◽  
Life Stages ◽  
School Work

Transposable elements (TEs) can be maintained in sexually reproducing species even if they are harmful. However, the evolutionary strategies that TEs employ during proliferation can modulate their impact. In this review, I outline the different life stages of a TE lineage, from birth to proliferation to extinction. Through their interactions with the host, TEs can exploit diverse strategies that range from long-term coexistence to recurrent movement across species boundaries by horizontal transfer. TEs can also engage in a poorly understood phenomenon of TE resurrection, where TE lineages can apparently go extinct, only to proliferate again. By determining how this is possible, we may obtain new insights into the evolutionary dynamics of TEs and how they shape the genomes of their hosts.

Sign in / Sign up

Export Citation Format

Share Document