phalaris {drcSeedGerm}

A series of germination assays with Phalaris minor

Description

The germination of Phalaris minor was assayed at 6 mater potential levels and 6 temperature levels, on four replicated Petri dishes at each temperature and water potential. Twenty-five seeds per Petri dish were used. Inspections were made daily for twenty days.

Usage

data("phalaris")

Format

A data frame with 3024 observations on the following 9 variables.

temp

a numeric vector with the temperature level

water

a numeric vector with the water potential level

Dish

a numeric vector with the coding for Petri dishes

timeBef

a numeric vector, with the start time for each inspection interval

timeAf

a numeric vector, with the end time for each inspection interval

nViable

a numeric vector, with the number of viable seeds per dish, at the beginning of the assay

nSeeds

a numeric vector, with the number of germinated seeds during each inspection interval

nCum

a numeric vector, with the cumulative number of germinated seeds at each assessment time

propCum

a numeric vector, the cumulative proportion of germinated seeds at each assessment time

Details

The variable 'timeAf' contains the value 'Inf' (Infinity), that corresponds to the seeds which did not germinate during the assay, for which the germination times might be comprised from the last assessment time to infinity.

Author(s)

Mohsen Mesgaran

Source

Mesgaran, MB, A Onofri, HR Mashhadi, RD Cousens (2017) Water availability shifts the optimal temperatures for seed germination: A modelling approach. Ecological Modelling 351, 87–95

References

Mesgaran, MB, A Onofri, HR Mashhadi, RD Cousens (2017) Water availability shifts the optimal temperatures for seed germination: A modelling approach. Ecological Modelling 351, 87–95

Examples

data(phalaris)