Jump to ContentJump to Main Navigation
Perturbation, Behavioural Feedbacks, and Population Dynamics in Social AnimalsWhen to leave and where to go$
Users without a subscription are not able to see the full content.

Daniel Oro

Print publication date: 2020

Print ISBN-13: 9780198849834

Published to Oxford Scholarship Online: May 2020

DOI: 10.1093/oso/9780198849834.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 17 June 2021

Runaway Dispersal in Social Species

Runaway Dispersal in Social Species

Chapter:
(p.68) Chapter 4 Runaway Dispersal in Social Species
Source:
Perturbation, Behavioural Feedbacks, and Population Dynamics in Social Animals
Author(s):

Daniel Oro

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198849834.003.0005

Local populations are in most cases open and connected with other populations through dispersal. Dispersal, aside from its multiplicative nature, has a demographic additive effect for the spatiotemporal dynamics and extinction–colonization turnover of the donor and the receiver populations. Population dynamics are more sensitive to dispersal under perturbations, because dispersing is a resilience mechanism to avoid or reduce novel mortality risk. Furthermore, dispersing individuals carry information, a process that may create dynamic landscape information networks. In social species, the decision to stay or to disperse is made based on decisions made by others. When perturbations accumulate and jeopardize survival or fecundity, leading individuals may decide to disperse, and this decision is copied by others, generating a runaway dispersal to other patches. The decision trade-off between staying and dispersing depends on the dynamic spatiotemporal heterogeneity in patch quality. What matters for making a decision is not the difference in patch quality, but the ratio between the patch currently occupied and the rest of the patches. Decision-making in social animals for dispersing is explored under the frameworks of the prospect theory, the neoclassical economic theory, and the hypercycle theory. It is also shown how runaway dispersal may occur from a theoretical point of view due to a very simple mechanism of copying others in a density-dependent manner. This simple mechanism overruns a rational scenario when making decisions in social animals. This chapter ends by assessing the potential consequences of runaway dispersal for nonlinear responses in communities and entire ecosystems.

Keywords:   runaway dispersal, patch quality, metapopulation dynamics, decision-making, prospect theory, hypercycles, social feedbacks

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .