An Evaluation of Some Procedures Used in Simple Ordinations
- 29 February 1968
- journal article
- research article
- Published by JSTOR in Journal of Ecology
- Vol. 56 (1), 27-+
- https://doi.org/10.2307/2258064
Abstract
Simple ordinations of the Bray and Curtis (1957) and perpendicular axes (Orloci 1966) types of construction were produced from 4 sets of data using measures of inter stands distance derived from the Bray and Curtis (1957) similarity coefficient (C) and an Euclidian measure of distance (D) (Orloci 1966). The use of D results in a more efficient interpretation of tne original interstand distances within the ordinations while the Bray and Curtis method of construction is marginally more efficient than the perpendicular axes method. However the use of D appears to obscure gradients of composition and fails to separate dissimilar communities, particularly where the stands are rich in species, and in this respect the resulting ordinations are less efficient than those using derivatives of C. The differences would seem to be in part inherent in the actual measures of distance used but are also influenced by the mode of standardization of the original species'' scores.This publication has 6 references indexed in Scilit:
- An Agglomerative Method for Classification of Plant CommunitiesJournal of Ecology, 1967
- The Use of Subjective Estimates of Cover-Abundance as the Basis for OrdinationJournal of Ecology, 1966
- Geometric Models in Ecology: II. An Evaluation of Some Ordination TechniquesJournal of Ecology, 1966
- Geometric Models in Ecology: I. The Theory and Application of Some Ordination MethodsJournal of Ecology, 1966
- Multivariate Approaches to a Limestone Grassland Community: II. A Direct Species OrdinationJournal of Ecology, 1965
- Multivariate Approaches to a Limestone Grassland Community: I. A Stand OrdinationJournal of Ecology, 1965