Sandro Pignatti

Flora d'Italia

E. van der Maarel

L. Orloci

(RANKIN) of equivocation information (1-:) and interaction information (M). The method is described in the present paper for I: and in a previous paper (Orloci, 1976) for M. The results presented in this paper suggest that for Species Rank order Information Percentage of total* species to be weighted according to their suitability to I· M I M r M characterize isolated groups of releves in a phytosociolo 5 7 54.15 2.31 17.97 0.82 gical table, the equivocation information may serve as a 9 5 49.86 23.19 16.55 8.22 3 3 9 47.79 0.56 15.86 0.20 suitable weight. The appropriate formulations are derived 6 4 8 36.18 1.18 12.01 0.42 4 5 3 24.36 59.34 8.09 21.03 and computed for some data from a salt marsh community. 8 6 4 24.25 39.04 8.05 13.84 10 7 I 21.96 71.17 7.29 25.23 7 8 2 18.67 69.01 6.20 24.46 9 10 18.40 6.11 10 6 5.64 16.31 1.87 5.78 References Total 301.00* 282.11 * 100.00 100.00 Feoli, E. 1973. An index for weighing characters in monothetic classifications. (Italian with English summary). Giorn. Bot. Ita!' 107: 263-268. Gower, J.e. 1967. A comparison of some methods of cluster is a monotone, increasing function of sample size if .. ).

Report on the activities of the Working Group for data-processing in phytosociology of the International society for vegetation science, 1969–1978

Data-processing in phytosociology

Erika Pignatti

This volume offers distribution maps of over 2200 individual species living in the Dolomite area, presenting detailed records on the local range of every species growing in the area studied, from the Puster Valley to the Piave River. The data was collected on the basis of a multiple field observations carried out over several decades. After dividing the area into approx. 200 quadrants, a nearly complete census of the species present was obtained for each quadrant. The evaluation and synopsis of this extensive set of data, which is presented in the form of a chorological atlas in keeping with international standard methods, allows the area to be accurately compared with other parts of the Alps. In addition to the chorological atlas and floristic inventory, a list of synonyms and toponyms of the three languages used in the analyzed territory, an expanded list of updated scientific names, and some helpful remarks on various Dolomites species are included. Lastly, the book explores how species can be considered as landscape bioindicators. This third volume of the work Plant Life of the Dolomites complements the main volume Vegetation Structure and Ecology and the volume Vegetation Tables, which presents essential data at the plant association level.

Atlas of Flora

Plant Life of the Dolomites

This volume provides an in-depth analysis of over 100 plant communities of the Dolomite vegetation. The data is based on the phytosociological relevés, which have been collected by the authors in nearly 2000 surveys. The key part consists of approx. 130 association tables presenting plant sociological data for the respective plant communities. Thus, this volume perfectly complements the successful main volume “Plant Life of the Dolomites: Vegetation Structure and Ecology,” which features summarized, synoptic association tables of the twelve habitats. In addition, geo-referenced locations of relevés and detailed ecological measures are provided. A further part describes the individual components of the fascinating dolomitic landscape (Heritage of all Humanity) and presents tables of vegetation complexes, which summarize the more than 400 surveys carried out in the Dolomites. The structure of this supplementary volume corresponds to that of the main volume with a key part consisting of twelve chapters, each describing a specific habitat, and a total of 106 associations. Several topics covered in the main volume, such as the exploration of the flora, ecological factors and syntaxonomy are discussed further here.

Sandro Pignatti

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