Calculates the reduced-bias diversity of order \(q\) of a metacommunity.
GammaDiversity(MC, q = 1, Correction = "Best", Tree = NULL, Normalize = TRUE, Z = NULL, CheckArguments = TRUE)
A number: the order of diversity. Default is 1.
A string containing one of the possible corrections accepted by
"Best", the default value.
TRUE (default), diversity is not affected by the height of the tree.
FALSE, diversity is proportional to the height of the tree.
A relatedness matrix, i.e. a square matrix whose terms are all positive, strictly positive on the diagonal. Generally, the matrix is a similarity matrix, i.e. the diagonal terms equal 1 and other terms are between 0 and 1.
TRUE, the function arguments are verified. Should be set to
FALSE to save time when the arguments have been checked elsewhere.
Entropy is calculated by
GammaEntropy and transformed into diversity.
The metacommunity's gamma entropy.
Marcon, E., Scotti, I., Herault, B., Rossi, V. and Lang, G. (2014). Generalization of the partitioning of Shannon diversity. PLOS One 9(3): e90289.
Marcon, E., Herault, B. (2015). Decomposing Phylodiversity. Methods in Ecology and Evolution 6(3): 333-339.
Marcon, E., Zhang, Z. and Herault, B. (2014). The decomposition of similarity-based diversity and its bias correction. HAL hal-00989454(version 3).
# Load Paracou data (number of trees per species in two 1-ha plot of a tropical forest) data(Paracou618) # Calculate Simpson gamma diversity GammaDiversity(Paracou618.MC, 2) #> UnveilJ #> 73.09335 # Compare without correction GammaDiversity(Paracou618.MC, 2, Correction = "None") #> None #> 68.7215 # Estimate phylogenetic Simpson gamma diversity GammaDiversity(Paracou618.MC, 2, Tree = Paracou618.Taxonomy) #>  25.11451