Modeling hydrochory effects on the Tunisian island populations of Pancratium maritimum L. using colored Petri nets

Hydrochory, the seed dispersal by water, is a strategy used by many aquatic and some terrestrial plants to move into areas appropriate for establishment. In this paper we model the hydrochory effects on the Tunisian island populations of Pancratium maritimum L. using colored Petri nets. Nineteen Tunisian coastal sites were considered including fourteen mainland and five island sites. The model was simulated for 400 thousand Atlantic Tunisian Current cycles (years). Snapshots of the island population's genetic makeup were taken for 50, 200 and 400 thousand years. The evolution of the obtained dendrograms showed a clear divide between the northern and southern island populations according to their estimated genetic make-up for the considered simulation durations. Hydrochory is not only with important ecological consequences, such as maintaining the populations of P. maritimum but also it may move species into areas appropriate for establishment. In this context, in situ and ex situ conservation measures of P. maritimum populations should be adopted very fast.

[1]  G. Gasparini,et al.  Hydrographic characteristics and interannual variability of water masses in the central Mediterranean: a sensitivity test for long-term changes in the Mediterranean Sea , 2002 .

[2]  J. Guitian,et al.  Breeding system and temporal variation in fecundity of Pancratium maritimum L. (Amaryllidaceae): Reproductive ecology of Pancratium maritimum , 1999 .

[3]  C. Nilsson,et al.  The role of hydrochory in structuring riparian and wetland vegetation , 2010, Biological reviews of the Cambridge Philosophical Society.

[4]  Kurt Jensen.  Coloured Petri nets , 1986 .

[5]  A. Fahn,et al.  Seed Anatomy of Pancratium Species from Three Different Habitats , 1975, Botanical Gazette.

[6]  Paolo De Luca,et al.  Phylogenetic and biogeographical inferences for Pancratium (Amaryllidaceae), with an emphasis on the Mediterranean species based on plastid sequence data , 2012 .

[7]  A. Fahn,et al.  4 – ANATOMICAL MECHANISMS OF SEED DISPERSAL , 1972 .

[8]  M. Nei,et al.  Estimation of average heterozygosity and genetic distance from a small number of individuals. , 1978, Genetics.

[9]  Kurt Jensen,et al.  A Brief Introduction to Coloured Petri Nets , 1997, TACAS.

[10]  Kingsley W. Dixon,et al.  Buoyancy, salt tolerance and germination of coastal seeds: implications for oceanic hydrochorous dispersal , 2010 .

[11]  Kurt Jensen.  Coloured Petri Nets , 1992, EATCS Monographs in Theoretical Computer Science.

[12]  A. Robinson,et al.  Features of dominant mesoscale variability, circulation patterns and dynamics in the Strait of Sicily , 2001 .

[13]  A. Sharov,et al.  Self-reproducing systems: structure, niche relations and evolution. , 1991, Bio Systems.

[14]  Hiroshi Kudoh,et al.  Hydrochory as a determinant of genetic distribution of seeds within Hibiscus moscheutos (Malvaceae) populations. , 2007, American journal of botany.

[15]  Michael Westergaard,et al.  CPN Tools for Editing, Simulating, and Analysing Coloured Petri Nets , 2003, ICATPN.

[16]  C. Sammari,et al.  Sea level variability and tidal resonance in the Gulf of Gabes, Tunisia , 2006 .

[17]  Ina Koch,et al.  Model validation of biological pathways using Petri nets , 2004 .

[18]  Hala G. Zahreddine,et al.  Status of native species in threatened Mediterranean habitats: the case of Pancratium maritimum L. (sea daffodil) in Lebanon , 2004 .

[19]  Adnen Sanaa,et al.  Pancratium maritimum L. in Tunisia: Genetic and chemical studies among the threatened populations , 2014 .

[20]  S. Popov,et al.  Alkaloids in Bulgarian Pancratium maritimum L. , 2004, Zeitschrift fur Naturforschung. C, Journal of biosciences.

[21]  Rebecca L. Schneider,et al.  Hydrochory and Regeneration in A Bald Cypress‐Water Tupelo Swamp Forest , 1988 .

[22]  P. J. Minnett,et al.  Atlantic water in the strait of Sicily , 1990 .

[23]  Dr. Leendert van der Pijl.  Principles of Dispersal in Higher Plants , 1983, Springer Berlin Heidelberg.

[24]  P. Schippers,et al.  Modelling seed dispersal by wind in herbaceous species , 1999 .

[25]  Lars Michael Kristensen,et al.  Coloured Petri Nets and CPN Tools for modelling and validation of concurrent systems , 2007, International Journal on Software Tools for Technology Transfer.

[26]  Adnen Sanaa,et al.  Genetic diversity in mainland and island populations of the endangered Pancratium maritimum L. (Amaryllidaceae) in Tunisia. , 2010 .

[27]  Robert M. Shapiro,et al.  An integrated software development methodology based on hierarchical colored Petri Nets , 1990, Applications and Theory of Petri Nets.

[28]  L. van der Pijl,et al.  Principles of Dispersal in Higher Plants , 1970, Springer Berlin Heidelberg.