In MarcoPittarello/ResNatSeed: A tool for the assessment of the REStoration potential of NATive SEEDs based on topographic factors

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

library(ResNatSeed)

When the user uses default settings, the training database refers to the vegetation surveys from the Piedmont Region - North-Western Italy, which includes 248 plant species eligible to modeling. Such a list can be extracted through the command data("cep.piem"). Species names follow the Flora Alpina nomenclature [@aeschimann2004] and they are associated with the 'cep.names' code, an eight-letter abbreviation of species names according to the Cornell Ecology Programs (CEP).

data("cep.piem")

head(cep.piem)

From this list is possible to create the mixture or donor grassland composition database, which is characterized by two columns:

• First column: species code abbreviated in CEP names format
• Second column: abundance of each species. Abundance must be a number bounded between 0 and 100, which can be either a species relative abundance or a species cover (sensu [@pittarello2016]; [@verdinelli2022]).

In this example, the donor grassland composition is characterized by five species:

• Bromus erectus (CEP name: Bromere), relative abundance: 25%
• Brachypodium rupestre (CEP name: Bracrupe), relative abundance: 18%
• Festuca ovina aggr. (CEP name: Festaggr), relative abundance: 22%
• Knautia arvensis (CEP name: Knauarve), relative abundance: 8%
• Silene vulgaris (CEP name: Silevulg), relative abundance: 5%

Total abundances amount to 78%. The total abundance of the seed mixture or donor grassland composition should not necessarily amount 100%.

We can generate the dataframe of the donor grassland composition:

donor.composition<-data.frame(
  species=c("Bromere","Bracrupe","Festaggr","Knauarve","Silevulg"),
  abundance=c(25,18,22,8,5)
)

donor.composition

It is now possible to use the RestInd function to calculate the Suitability Index (SI) and Reliability Index (RI) by means of the donor grassland composition (dataframe 'donor.composition') and of the elevation, slope, and aspect of restoration site:

• elevation: 2300 m a.s.l
• slope: 15°
• aspect: 135° N

RestInd(trainingDB = NULL, 
        composition=donor.composition,  
        elevation=2300, 
        slope=15, 
        aspect=135
        )

References

MarcoPittarello/ResNatSeed documentation built on April 14, 2023, 8:53 p.m.