Threshold Indicator Taxa Analysis
Controls the allocation of bootstrap replicates
Partitions environmental gradient for analysis
Performs calculation of IndVal z scores from observed and permuted val...
IndVal scores based on relative abundance across, and occurrence frequ...
Calculate permuted IndVal scores using a group matrix
Sum IndVal z scores across taxa
Summarizes results from TITAN's analaysis of observed data
Permutation of group membership for a single candidate partition
Plot community level change
Taxon change point ridge plots
Plots probability densities of empirical distributions of bootstrapped...
Plots the pattern of community change along an environmental gradient
Plots taxon-specific change points
Summarizes raw output from TITAN's bootstrap procedure
Summarizes the results of the community-level sum(z) analysis
Calculate bootstrapped IndVal z scores
Perform a threshold indicator taxa analysis
Threshold Indicator Taxa Analysis
Screening of site by taxa matrix
Uses indicator species scores across binary partitions of a sample set to detect congruence in taxon-specific changes of abundance and occurrence frequency along an environmental gradient as evidence of an ecological community threshold. Relevant references include Baker and King (2010) <doi:10.1111/j.2041-210X.2009.00007.x>, King and Baker (2010) <doi:10.1899/09-144.1>, and Baker and King (2013) <doi:10.1899/12-142.1>.