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Hidden Allee effect in photosynthetic organisms [PDF]

open access: yesCommunicative & Integrative Biology, 2020
In ecology and population biology, logistic equation is widely applied for simulating the population of organisms. By combining the logistic model with the low-density effect called Allee effect, several variations of mathematical expressions have been ...
Hiroshi Ohkawa   +2 more
doaj   +5 more sources

The genetic Allee effect: a unified framework for the genetics and demography of small populations

open access: yesEcosphere, 2016
The Allee effect is a theoretical model predicting low growth rates and the possible extinction of small populations. Historically, studies of the Allee effect have focused on demography.
Franck Courchamp   +2 more
exaly   +3 more sources

Genetic diversity in introduced populations with an Allee effect. [PDF]

open access: yesGenetics, 2014
AbstractA phenomenon that strongly influences the demography of small introduced populations and thereby potentially their genetic diversity is the demographic Allee effect, a reduction in population growth rates at small population sizes. We take a stochastic modeling approach to investigate levels of genetic diversity in populations that successfully
Wittmann MJ, Gabriel W, Metzler D.
europepmc   +6 more sources

Allee effects and the Allee-effect zone in northwest Atlantic cod. [PDF]

open access: yesBiol Lett, 2022
According to the theory of compensatory dynamics, depleted populations should recover when the threat responsible for their decline is removed because per capita population growth is assumed to be highest when populations are at their smallest viable sizes.
Perälä T, Hutchings JA, Kuparinen A.
europepmc   +7 more sources

Enhancement of extreme events through the Allee effect and its mitigation through noise in a three species system [PDF]

open access: yesScientific Reports, 2021
We consider the dynamics of a three-species system incorporating the Allee Effect, focussing on its influence on the emergence of extreme events in the system.
Deeptajyoti Sen, Sudeshna Sinha
doaj   +2 more sources

Genetic Allee effects and their interaction with ecological Allee effects [PDF]

open access: yesJournal of Animal Ecology, 2016
Summary It is now widely accepted that genetic processes such as inbreeding depression and loss of genetic variation can increase the extinction risk of small populations.
Wittmann, Meike J.   +2 more
openaire   +3 more sources

Can a Mate‐Finding Allee Effect Be Elicited to Help Eradicate Invasive Mammals? [PDF]

open access: yesEcology and Evolution
The Allee effect is an important ecological process that has implications for extinction of endangered species and for assisting the management of invasive species.
Dean P. Anderson   +3 more
doaj   +2 more sources

Chaos and bifurcations of a discretized Holling-II prey-predator model including prey refuge and Allee effect [PDF]

open access: yesScientific Reports
This study examines the dynamics of a discrete-time predator-prey system incorporating a Holling Type-II functional response, the Allee effect, and a refuge term. Through algebraic analysis, we establish the occurrence of Period-Doubling (PD) and Neimark-
Md. Mutakabbir Khan, Md. Jasim Uddin
doaj   +2 more sources

Dynamical analysis of a Lotka Volterra commensalism model with additive Allee effect

open access: yesOpen Mathematics, 2022
We propose and analyze a Lotka-Volterra commensal model with an additive Allee effect in this article. First, we study the existence and local stability of possible equilibria.
He Xiaqing   +3 more
doaj   +1 more source

Interaction between Allee effects caused by organism-environment feedback and by other ecological mechanisms. [PDF]

open access: yesPLoS ONE, 2017
Understanding Allee effect has crucial importance for ecological conservation and management because it is strongly related to population extinction. Due to various ecological mechanisms accounting for Allee effect, it is necessary to study the influence
Lijuan Qin   +3 more
doaj   +1 more source

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