Responses of the haploid-to-diploid ratio of isomorphic biphasic life cycles to time instability. | - CCMAR -

Journal Article

TitleResponses of the haploid-to-diploid ratio of isomorphic biphasic life cycles to time instability.
Publication TypeJournal Article
AuthorsVieira, V, Santos, R
Year of Publication2012
JournalJ Biol Dyn
Volume6
Date Published2012
Pagination1067-87
ISSN1751-3766
KeywordsDiploidy, Fertility, Haploidy, Linear Models, Population Dynamics, Seaweed, Time Factors
Abstract

Previous modelling of the haploid-to-diploid ratio (H:D) in biphasic life cycles relied on estimates of the stable population growth rate and structure. This is a projective analysis that estimates the population dynamics given current conditions. However, the environment is rarely constant and has both periodicity and random instabilities. The objective of this work was to unveil how the H:D responds to them. It was found that ploidy phase dissimilarities on the demographic matrix and/or in the initial population structure cause an inevitable H:D time variability as a consequence of the life-cycle structure and independent of the environmental seasonal cycle. This variability depends on the type of life strategy, demographic processes involved and ploidy dissimilar vital rates. Furthermore, ploidy dissimilar fertility or growth rates cause cyclic oscillations mismatching the seasonal cycle, whereas ploidy dissimilarities in the ramet looping rates (survival related) induce a monotonical variation.

DOI10.1080/17513758.2012.721901
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/22992119?dopt=Abstract

Alternate JournalJ Biol Dyn
PubMed ID22992119
CCMAR Authors