摘要:

The examination of samples containing many species presents difficulties of description and comparison when the samples are treated as entities. Five different methods of sample description are discussed with special reference to mist‐net samples of Malayan birds and it is concluded that the log‐series is the most satisfactory with these data. The variation of the index of diversity is examined in time and between habitats and it is concluded that the index provides a measure of habitat diversity in relation to a fauna but may be affected by lack of species preadapted to newly available or expanded habitats. Theoretical and practical features of the various models are also exami

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1971.tb00170.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

摘要:

A comparison is made between a number of indices of similarity fer describing the similarities between multiple species samples, namelyK, I, (1 ‐ z), (x2/AT)1/2,rand a weighted similarity coefficient under various transformations. After discussing theoretical aspects of the indices, they are tested on two sets of data obtained by mist‐netting birds. The resulting matrices are sorted by a simple nearest‐neighbour agglomerative technique and later by principal component analysis. It is concluded that the V index, which is Kendall's rank correlation coefficient (Kendall, 1955), provides the most meaningful segregation, particularly under principal component analysis. Problems of subjective interpretation are disc

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1971.tb00171.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

摘要:

The taxonomic value of characters provided by male Coccoidea is reviewed in relation to traditional classifications based on the female. Numerical methods based largely on principal component analysis are applied to the classification of some Diaspididae and the various techniques are compared and evaluated.

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1971.tb00172.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

ISSN:0024-4066    

DOI:10.1111/j.1095-8312.1971.tb00170a.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY