Fauna::Demo::LogisticGrass::Parameters Struct Reference

Settings for grass growth. More...

#include <logistic_grass.h>

Public Member Functions
bool	is_valid (std::string &msg) const
	Check if parameters are valid. More...

Public Attributes
std::vector< double >	decay_monthly = {0.0}
	Proportional daily rates of grass decay [day^-1]. More...
std::vector< double >	digestibility = {0.5}
	Proportional digestibility of the grass [frac]. More...
double	fpc = 0.1
	Fraction of habitat/patch covered with grass [frac]. More...
std::vector< double >	growth_monthly = {0.0}
	Proportional daily grass growth rates [day^-1]. More...
double	init_mass = 0.0
	Initial available forage [kgDM/km²]. More...
double	reserve = 0.1
	Ungrazable grass biomass reserve, inaccessable to herbivores [kgDM/km²]. More...
double	saturation = 1.0
	Saturation grass biomass [kgDM/m²]. More...

Detailed Description

Settings for grass growth.

The initialization values are just arbitrary.

Member Function Documentation

is_valid()

bool LogisticGrass::Parameters::is_valid

(

std::string &

msg

)

const

Check if parameters are valid.

Parameters

[out]

msg

Possible warnings and error messages.

Returns

true if values are valid, false if not.

Member Data Documentation

decay_monthly

std::vector<double> Fauna::Demo::LogisticGrass::Parameters::decay_monthly = {0.0}

Proportional daily rates of grass decay [day^-1].

This is a vector of daily decay rates for each month. When the end of the vector is reached, the values are recycled. A vector of length 12 creates the same behaviour every year.

digestibility

std::vector<double> Fauna::Demo::LogisticGrass::Parameters::digestibility = {0.5}

Proportional digestibility of the grass [frac].

This is a vector of digestibility values for each month. When the end of the vector is reached, the values are recycled. A vector of length 12 creates the same behaviour every year.

fpc

double Fauna::Demo::LogisticGrass::Parameters::fpc = 0.1

Fraction of habitat/patch covered with grass [frac].

growth_monthly

std::vector<double> Fauna::Demo::LogisticGrass::Parameters::growth_monthly = {0.0}

Proportional daily grass growth rates [day^-1].

This is a vector of daily growth rates for each month. When the end of the vector is reached, the values are recycled. A vector of length 12 creates the same behaviour every year.

init_mass

double Fauna::Demo::LogisticGrass::Parameters::init_mass = 0.0

Initial available forage [kgDM/km²].

This should be smaller than saturation

reserve

double Fauna::Demo::LogisticGrass::Parameters::reserve = 0.1

Ungrazable grass biomass reserve, inaccessable to herbivores [kgDM/km²].

Owen-Smith (2002) gives value of 20 g/m²

saturation

double Fauna::Demo::LogisticGrass::Parameters::saturation = 1.0

Saturation grass biomass [kgDM/m²].

Owen-Smith (2002): 200 g/m²

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The documentation for this struct was generated from the following files:

• /home/docs/checkouts/readthedocs.org/user_builds/modular-megafauna-model/checkouts/latest/tools/demo_simulator/logistic_grass.h
• /home/docs/checkouts/readthedocs.org/user_builds/modular-megafauna-model/checkouts/latest/tools/demo_simulator/logistic_grass.cpp