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AN ECOLOGICAL STUDY OF AQUATIC HABITATS IN NORTH‐WEST OVERIJSSEL, THE NETHERLANDS
Author(s) -
ülehlová Blanka
Publication year - 1970
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1970.tb00188.x
Subject(s) - macrophyte , vegetation (pathology) , insolation , habitat , environmental science , structural basin , aquatic plant , vegetation cover , ecology , plant cover , hydrology (agriculture) , physical geography , geology , climatology , geography , canopy , geomorphology , biology , land use , medicine , geotechnical engineering , pathology
SUMMARY During summer 1967 an ecological study of the zonation of different macrophytes was made in the three basins of Chielgat, Venematen and Zuideindigerwiede in North‐West Overijssel, the Netherlands. Chemical properties of sapropels, microclimatic conditions and composition of mud gases in habitats of different macrophyte zones were studied. The three basins show various degrees of trophism and different qualities of humic substances in sapropels. The habitats of different macrophytes in the same basin are also different. Each vegetation zone is characterized by a special temperature course in different water and air layers. The temperature course is dependent on the position and structure of the vegetation zone and on weather conditions. Water temperature is influenced by the duration of insolation, and by the direction and strength of wind. Time‐shifts in the warming‐up of the lower water layers are also of interest. The relative amounts of C0 2 , 0 2 , N 2 and CH 4 were estimated both under and in the plant cover of the vegetation zones under study. While under the plant cover CH 4 prevails in the gas mixture, in the plant cover C0 2 , 0 2 and N 2 are of higher importance. The amount of C0 2 + CH 4 on the one hand and the amount of N 2 on the other hand reflect the outputs of C and N metabolisms which take place in the basins. The gaseous output of C and N metabolisms in the basins under study are related to the trophisms of individual basins.