Selection for intermediate mortality and reproduction rates in a spatially structured population

Proceedings. Biological Sciences
S RichardsJ E Socolar

Abstract

How local interactions influence both population and evolutionary dynamics is currently a key topic in theoretical ecology. We use a 'well-mixed' analytical model and spatially explicit individual-based models to investigate a system where a population is subject to rare disturbance events. The disturbance can only propagate through regions of the population where the density of individuals is sufficiently high and individuals affected by the disturbance die shortly after. We find that populations where individuals are sessile often exhibit very different dynamic behaviour when compared to populations where individuals are mobile and spatially well mixed. When mutations are allowed which affect either offspring birth rates or mortality rates, the well-mixed populations always evolve to a state where a single disturbance event leads to extinction. Populations often persist substantially longer if individuals are sessile and they disperse their offspring locally. We also find that for sessile populations selection may favour short-lived individuals with limited offspring production. Population dynamics are found to be strongly influenced by the host characters that are evolving and the rate at which host variation is introduced i...Continue Reading

References

Apr 20, 2002·Mathematical Biosciences·Andrea Pugliese
Feb 20, 2010·Proceedings of the National Academy of Sciences of the United States of America·Rick Durrett
Oct 3, 2013·PloS One·J Timothy Wootton, James D Forester
Aug 11, 2004·Theoretical Population Biology·F Frédéric Guichard
Jul 20, 2000·Theoretical Population Biology·S Richards, W G Wilson
Apr 20, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J E SocolarW G Wilson
Jun 21, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C RobertJ Doyle
Jan 18, 2006·British Journal of Nursing : BJN·Theresa Frawley, Cecily M Begley

Citations

Jan 1, 1994·Journal of Mathematical Biology·K SatoA Sasaki
Oct 25, 1993·Physical Review Letters·C L Henley
May 27, 1999·Proceedings. Biological Sciences·M J Keeling
Mar 24, 1978·Science·J H Connell

Related Concepts

Neomalthusianism
Plant Development
Biological Evolution

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Sexual Dimorphism in Neurodegeneration

There exist sex differences in neurodevelopmental and neurodegenerative disorders. For instance, multiple sclerosis is more common in women, whereas Parkinson’s disease is more common in men. Here is the latest research on sexual dimorphism in neurodegeneration

HLA Genetic Variation

HLA genetic variation has been found to confer risk for a wide variety of diseases. Identifying these associations and understanding their molecular mechanisms is ongoing and holds promise for the development of therapeutics. Find the latest research on HLA genetic variation here.

Super-resolution Microscopy

Super-resolution microscopy is the term commonly given to fluorescence microscopy techniques with resolutions that are not limited by the diffraction of light. Here are the latest discoveries pertaining to super-resolution microscopy.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells.

Brain Lower Grade Glioma

Low grade gliomas in the brain form from oligodendrocytes and astrocytes and are the slowest-growing glioma in adults. Discover the latest research on these brain tumors here.

CD4/CD8 Signaling

Cluster of differentiation 4 and 8 (CD8 and CD8) are glycoproteins founds on the surface of immune cells. Here is the latest research on their role in cell signaling pathways.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.