jansson b o (3 Ergebnisse)

Zustand: Good. Volume 1. This is an ex-library book and may have the usual library/used-book markings inside.This book has hardback covers. In good all round condition. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item,700grams, ISBN:0849343178.

The vertical distribution of the microfauna in the sediments of the water-covered parts of a beach on the island of Askö (Baltic Sea) was investigated by quantitative methods. Factors such as temperature, salinity, grain size, oxygen, pH and redox potential were measured at various depths in the sediment. The members of the microfauna, especially the ciliates, showed a characteristic vertical zonation. The vertical extension of the species could be correlated with the redox potential of the sediment, especially the depth of the redox-discontinuity layer. The possible reasons for this are discussed, the most important probably being the type of bacterial flora characteristic of different electrode potentials. A quantitative estimate on the different taxonomic groups of the microfauna in the investigated area is given. Ciliates were most numerous (100480 specimens per ems) while the most important metazoan groups (turbellarians, nematodes, rotatorians, oligochaetes and harpacticoids) each were represented by 10 to 500 times fewer individuals. 17 pp. + 1 pl., 7 figs, gr. 8.

Zustand: Very Good. , text figs. . HB. 8vo, nicely bound in buckram, with contrasting title piece to spine. A collection of 8 papers bound together. Includes Fenchel: 'The Ecology of Marine Microbenthos' Pts I-III, (1967-1968) Ophelia 4-5, plus one other from Ophelia; Jansson: four studies on interstitial fauna of marine sandy beaches (1967-1968), from Oikos, Ophelia, J. exp. Mar. Biol. Ecol. and a Thesis ('Studies on the Ecology of the Interstitial Fauna of Marine Sandy Beaches' - Thesis based on seven papers previously published).