Results 61 to 70 of about 3,319 (144)

Eco‐Evolutionary Dynamics of Generalist and Specialist Pollinators Facing Plant Diversity Changes

open access: yesEcology and Evolution, Volume 16, Issue 3, March 2026.
We use a trait‐based eco‐evolutionary model to explore how changes in flowering plant composition affect interacting pollinators on short‐term ecological and long‐term evolutionary timescales. We find that evolutionary responses to landscape simplification, especially among generalist pollinators, may lead to a substantial loss of functional diversity ...
Martin Eriksson, Mikael Pontarp
wiley   +1 more source

Dominant deer mice show the importance of abundance in competition

open access: yesEcosphere, Volume 17, Issue 3, March 2026.
Abstract Detecting competitive interactions is important for predicting species responses to environmental change but remains challenging, especially over large scales. Modern coexistence theory predicts that reduced ecological trait overlap promotes coexistence through stabilizing mechanisms, while fitness differences generate competitive asymmetries.
Arielle W. Parsons   +2 more
wiley   +1 more source

On a kinetic model for a simple market economy

open access: yes, 2004
In this paper, we consider a simple kinetic model of economy involving both exchanges between agents and speculative trading. We show that the kinetic model admits non trivial quasi-stationary states with power law tails of Pareto type.
A. Baldassarri   +23 more
core   +4 more sources

MicrobTiSDA: A flexible R package for inferring interspecies interactions and abundance dynamics in microbiome time‐series data

open access: yesiMetaOmics, Volume 3, Issue 1, March 2026.
MicrobTiSDA is a user‐friendly and flexible R package specifically designed for longitudinal microbiome data analysis. By integrating process‐oriented functional modules—including data input, data preprocessing, interspecies interaction inference, natural spline regression modeling, temporal pattern clustering, and random forest classification ...
Shijia Li   +5 more
wiley   +1 more source

Intrinsic noise and two-dimensional maps: Quasicycles, quasiperiodicity, and chaos

open access: yes, 2014
We develop a formalism to describe the discrete-time dynamics of systems containing an arbitrary number of interacting species. The individual-based model, which forms our starting point, is described by a Markov chain, which in the limit of large system
Challenger, Joseph D.   +3 more
core   +1 more source

Distilling food web dynamics: top–down and bottom–up drivers of extinction and trophic cascades

open access: yesOikos, Volume 2026, Issue 3, March 2026.
Quantifying population dynamics is a fundamental challenge in ecology and evolutionary biology, particularly for species that are cryptic, microscopic, or extinct. Traditional approaches rely on continuous representations of population size, but in many cases, the precise number of individuals is unknowable.
Justin D. Yeakel
wiley   +1 more source

Mass Energy and Flow in closed ecosystems [PDF]

open access: yes, 1972
The general equations of biomass and energy transfer for an n-species, closed ecosystem are written. It is demonstrated how in "ecological time" the parameters describing the dynamics of biomass transfer are related to the parameters of energy transfer ...
Ulanowicz, Robert
core  

Relative Entropy in Biological Systems

open access: yes, 2016
In this paper we review various information-theoretic characterizations of the approach to equilibrium in biological systems. The replicator equation, evolutionary game theory, Markov processes and chemical reaction networks all describe the dynamics of ...
Baez, John C., Pollard, Blake S.
core   +2 more sources

Population oscillations in spatial stochastic Lotka-Volterra models: A field-theoretic perturbational analysis

open access: yes, 2012
Field theory tools are applied to analytically study fluctuation and correlation effects in spatially extended stochastic predator-prey systems. In the mean-field rate equation approximation, the classic Lotka-Volterra model is characterized by neutral ...
Tauber, Uwe C.
core   +1 more source

Symmetric competition as a general model for single-species adaptive dynamics

open access: yes, 2012
Adaptive dynamics is a widely used framework for modeling long-term evolution of continuous phenotypes. It is based on invasion fitness functions, which determine selection gradients and the canonical equation of adaptive dynamics.
Doebeli, Michael, Ispolatov, Iaroslav
core   +1 more source

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