plant_diversity {SoilManageR}R Documentation

Calculate plant diversity indicators

Description

Derives three indicators for plant diversity of a crop rotation based on management information (mainly sowing events).

Usage

plant_diversity(var_MGMT_data, start_year, end_year)

Arguments

var_MGMT_data

a 'management_df' with a management history

start_year

start year of the cropping sequence of interest

end_year

end year of the cropping sequence of interest

Details

For the function to work properly the species (or variety) must be mentioned in the "product" column, and all sown species of mixtures must be represented in a single row of the management_df each.

The function calculates the plant diversity index (PDI), the total number of different species, and the Shannon index for all sown species.

The PDI is calculated in the following way inspired by Tiemann et al. (2015):

PDI = \overline{S_{year}} * S_{rotation}

where \overline{S_{year}} is the average number of sown species per year and S_{rotation} is the total number of different species sown in the full crop rotation or cropping sequence.

The Shannon Index is calculated with the shannon_index() function.

Value

a tibble with three indicators for plant diversity

References

Tiemann LK, Grandy AS, Atkinson EE, Marin-Spiotta E, McDaniel MD (2015). “Crop rotational diversity enhances belowground communities and functions in an agroecosystem.” Ecology Letters, 18(8), 761-771. doi:10.1111/ele.12453.

See Also

Examples

plant_diversity(EXAMPLE_data,2013,2020)


[Package SoilManageR version 1.0.1 Index]