Bryophyte Ecology by J. W. Bates (auth.), A. J. E. Smith (eds.)

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By J. W. Bates (auth.), A. J. E. Smith (eds.)

There has been an expanding curiosity in bryophyte ecology over the last a hundred or so years, firstly of a phytosociological nature yet, also, in recent times, of an experimental nature in addition. Early stories of bryophyte groups have resulted in exact investigations into the relationships among the crops and their surroundings. Ecological papers, the massive variety of that is evidenced by means of the size of the bibliographies within the next chapters, have seemed in several journals. but, except overview chapters, via H. Gams and P. W. Richards in handbook of Bryology, edited b:; H. Verdoorn in 1932 and chapters in E. V. Watson's constitution and lifetime of Bryophytes, Prem Puri's Bryophytes - A vast standpoint and D. H. S. Richardson's The Biology of Mosses, released in 1972,1973 and 1981 respectively, no common debts of bryophyte ecology were released. even supposing the Bryophyta is a comparatively small department of crops, with among 14000 and 21000 species the curiosity that they've aroused is out of all percentage to the scale both of the vegetation or of the department. it really is obvious, notwithstanding, that regardless of their relative insigni­ ficance they play an enormous ecological position, specifically in severe environments and, relating to bryophytes in tropical cloud forests and of Sphagnum, will also be a dominant consider the ecology of the realm concerned.

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Rasmussen and Hertig, 1977). An important point which should be considered in multiple regression studies, and other correlative investigations, is the possibility that communities may not be at static equilibrium with their physical and chemical environment. Cyclical changes have been observed in a number of bryophyte communities (Richards, 1938; Proctor, 1962) and these may confound the interpretation of blindly applied numerical analyses (Yarranton, 1970). Multiple regression has also been employed by Callaghan et al.

9,744-9. W. (1968), Bryologist, 71,21--S. Siedel, D. (1976), Flora, lena, 165,139--62. G. (1976),1. Hattori. bot. , 41, 107-32. G. (1977), Bull. N. y. St. Mus. Sci. , 428,1-70. E. D. (1975),1. , 8,423-33. LL. (1972), British Antarctic Survey Scientific Reports, 68. LL. H. (1976), Bull. Br. , 43, 2~7. E. (1966), Ecological Methods: with particular reference to the study of insect populations, Methuen, London. E. (1976), Bryologist, 79,1-15. W. L. (1974a), Bryologist, 77,1-16. W. L. (1974b), Bryologist, 77,551--60.

A very useful summary of the distribution centres of selected groups of species was produced by plotting maps showing the numbers of species of a particular inverse analysis class present within each vice-county (Fig. 11). In a further stage of the analysis, Proctor (1967) subjected the reduced data set, consisting of 25 normal vice-county groupsx47 inverse species groups, to ordination by principal components analysis to clarify distributional relationships. The ordinations clearly demonstrated the importance of oceanicity and montanicity as separate, but partially correlated, factors influencing hepatic distribution patterns in the British Isles.

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