model.joensson.customize | R Documentation |
This page describes the parameters that can be used to customize the Jönsson model. The model was developed by \insertCiteJonsson2011;textualbarrks. Look here to find out how to apply the model.
dd_onset_start_date |
The date, when the degree days start to sum up ('MM-DD'). |
dd_onset_base |
Base temperature to calculate degree days to trigger the onset. |
dd_onset_threshold |
Degree days that are required to trigger the onset of
infestation. Additionally, the maximum temperature must exceed |
tfly |
Minimum temperature that beetles need to fly. |
dd_development_base |
Base temperature to calculate degree days for development. |
dd_total_dev_lower , dd_total_dev_upper |
Lower/upper limit of degree days that are required for a generation to fully develop |
dev_start , dev_end |
Share in total development when the egg development starts and the juvenile beetle's development ends respectively. Usable if the development below/above these thresholds should account for mating, oviposition etc. |
dev_mortal_min , dev_mortal_max |
The beetles are considered to be in
white stages (egg, larva, pupa) if their development exceeds |
model_end_date |
Date when the model ends (no further development will be modeled). |
daylength_dia , tdia_min |
When the daylength falls below |
In barrks
, model()
is used to customize a model. The following code
illustrates which parameters are available for the Jönsson model and specifies their
default values.
model("joensson", # ==== onset ==== dd_onset_start_date = '01-01', dd_onset_base = 5, dd_onset_threshold = 120, # ==== onset + development ==== tfly = 20, # ==== development ==== dd_development_base = 5, dd_total_dev_lower = 625, dd_total_dev_upper = 750, dev_start = 0, dev_end = 1, dev_mortal_min = 0, dev_mortal_max = 1, model_end_date = '12-31', # ==== diapause ==== daylength_dia = 19.3, tdia_min = 15 )
model()
, phenology()
, model.joensson.apply
Other model customizations:
model.bso.customize
,
model.chapy.customize
,
model.lange.customize
,
model.phenips.customize
,
model.phenips_clim.customize
,
model.rity.customize
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