Document Detail


Changing environments causing time delays in population dynamics.
MedLine Citation:
PMID:  23770434     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We use a linear diffusion process to approximate a stochastic density regulated population model where parameters can change through time. Contrary to stationary models, there is a difference between the expected value and the carrying capacity of a population at any given time. This time delay can be considerable and depends on the vital rates of the population and the magnitude of the change. We emphasize the importance of acknowledging this difference when assessing viability of populations. As an illustration, we consider the population of Norwegian spring spawning herring and its collapse in the 1960s. Based on our analysis, the stock was already at a critical level a decade before the collapse was observed.
Authors:
Erik Blystad Solbu; Steinar Engen; Ola Håvard Diserud
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-6-12
Journal Detail:
Title:  Mathematical biosciences     Volume:  -     ISSN:  1879-3134     ISO Abbreviation:  Math Biosci     Publication Date:  2013 Jun 
Date Detail:
Created Date:  2013-6-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0103146     Medline TA:  Math Biosci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013. Published by Elsevier Inc.
Affiliation:
Centre for Biodiversity Dynamics, Department of Mathematical Sciences, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.. Electronic address: erik.solbu@math.ntnu.no.
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