OTU Stability and Factors Determining Taxonomic Stability: Examples from the Caminalcules and the Leptopodomorpha

作者：Robert R. Sokal, Kent L. Fiala, Gus L. W. Hart · 发表于：Systematic Biology · 年份：1984 · DOI：10.1093/sysbio/33.4.387 · 被引用次数：16 · 研究领域：Species Distribution and Climate Change、Scarabaeidae Beetle Taxonomy and Biogeography、Collembola Taxonomy and Ecology Studies

-Tests of OTU stability were carried out by random selection of subsets of OTUs from the Recent Caminalcules. From these samples we computed UPGMA phenograms and estimated cladograms based on Wagner parsimony and compatibility analysis. These were compared with pruned versions of the trees based on 29 OTUs representing: (1) their standards; and (2) the true cladogram known for this artificial data set. A similar analysis was carried out for a complete sampling of sets of OTUs from a data set based on the Leptopodomorpha (Hemiptera). Only the first type of comparison could be carried out for this data set. In the Caminalcules, when classifications based on samples of OTUs are compared with their own standards (classifications based on all OTUs)-which would be the typical situation in real organisms where true cladogenies are not known-stability seems to be a function of OTU sample size. For low OTU numbers, stability is higher in classifications based on estimated cladograms, but for high OTU numbers it is greater in classifications based on phenograms. While there is a trend towards increasing stability in the phenograms as OTU sample size increases, no such trend is evident in estimated cladograms of the standards or of the true cladogram. By contrast, estimated cladograms have a higher consensus with the true cladogram than do UPGMA phenograms regardless of number of OTUs employed. In the Leptopodomorpha, classifications based on UPGMA and Wagner parsimony methods are about...