Multivariate Analysis of Ecological Data


PC-ORD performs multivariate analysis of ecological data entered in spreadsheets. Our emphasis is on nonparametric tools, graphical representation, randomization tests, and bootstrapped confidence intervals for analysis of community data. In addition to utilities for transforming data and managing files, PC-ORD offers many ordination and classification techniques not available in major statistical packages including: CCA, DCA, Indicator Species Analysis, Mantel tests and partial Mantel tests, MRPP, PCoA, perMANOVA, RDA, two-way clustering, TWINSPAN, Beals smoothing, diversity indices, species lists, many ordination overlay methods (quantitative, symbol-coding, color-coding, grid, joint plot, biplot, successional vector), various rotation methods, 3-D ordination graphics, Bray-Curtis ordination, city-block distance measures, species-area curves, tree data summaries, publication-quality dendrograms, autopilot mode nonmetric multidimensional scaling (NMS or NMDS).



HyperNiche is user-friendly software for nonparametric regression. Our primary purpose is to provide a flexible tool for multiplicative habitat modeling – habitat models where the predictors are combined multiplicatively rather than additively. This is a flexible and powerful approach to habitat modeling. For in-depth explanation see Why NPMR?. Simple, ecologically reasonable response surfaces pose difficult challenges to traditional habitat modeling tools. HyperNiche provides tools that easily find complex response surfaces, such as this hump that combines sigmoid and Gaussian curves.