island_area: Function to describe changes in area through time.

In DAISIE: Dynamical Assembly of Islands by Speciation, Immigration and Extinction

Function to describe changes in area through time.

Description

Function to describe changes in area through time.

Usage

island_area(timeval, total_time, area_pars, peak, island_ontogeny, sea_level)

Arguments

timeval	Numeric defining current time of simulation.
total_time	Numeric defining the length of the simulation in time units.
area_pars	A named list containing area and sea level parameters as created by create_area_pars(): [1]: maximum area [2]: current area [3]: value from 0 to 1 indicating where in the island's history the peak area is achieved [4]: total island age [5]: amplitude of area fluctuation from sea level [6]: frequency of sine wave of area change from sea level [7]: angle of the slope of the island
peak	A numeric value specifying the peakiness (or shaprness) of the ontogeny curve. Higher values imply peakier ontogeny. This value is internally calculated by calc_peak() given the area at the present and the area_pars.
island_ontogeny	In DAISIE_sim_time_dep(), DAISIE_ML_CS and plotting a string describing the type of island ontogeny. Can be "const", "beta" for a beta function describing area through time. In all other functions a numeric describing the type of island ontogeny. Can be 0 for constant, 1 for a beta function describing area through time. In ML functions island_ontogeny = NA assumes constant ontogeny. Time dependent estimation is not yet available as development is still ongoing. Will return an error if called in that case.
sea_level	In DAISIE_sim_time_dep() and plotting a string describing the type of sea level. Can be "const" or "sine" for a sine function describing area through time. In all other functions a numeric describing the type of sea level. Can be 0 for constant, 1 for a sine function describing area through time.

Author(s)

Pedro Neves, Joshua Lambert

References

Valente, Luis M., Rampal S. Etienne, and Albert B. Phillimore. "The effects of island ontogeny on species diversity and phylogeny." Proceedings of the Royal Society of London B: Biological Sciences 281.1784 (2014): 20133227.

See Also

Other rate calculations: DAISIE_plot_area(), get_ana_rate(), get_ext_rate(), get_immig_rate(), island_area_vector(), update_max_rates(), update_rates()

DAISIE documentation built on Oct. 22, 2023, 1:06 a.m.