Polish Journal of Ecology, Volume 22Polish Scientific Publishers, 1974 - Ecology |
Contents
Indices and methods of calculating some parameters | 35 |
Pressure of frogs on the prey complex | 55 |
J Zimka Predation of frogs Rana arvalis Nilss in different forest site conditions 31 | 65 |
35 other sections not shown
Other editions - View all
Common terms and phrases
abundance actinomycetes activity algae analysis average biomass biotope calculated carabid Carabus Ceratium hirundinella Cladocera commercial fertilizers constancy of occurrence Czerwiński decomposition decrease density domination drainage basin Ecology effect Ekol estimated eutrophic factors faeces FMCF forest frogs g/m˛ Gościeradów grazed groups growing season growth habitat higher humus increase kindtii lake Tałtowisko larvae layer leaf accumulation Leśny manure maximal method microorganisms micropopulations Mikołajskie Lake mineral mountains the Carpathians neustria nitrogen number of individuals occur penning-up sheep percentage period phosphorus phytophages phytoplankton Pieniny mountains plankton plants plots treated population predators primary production priodonta Pterostichus pure pine stands relation rotifers samples saprophages Scarabaeidae seeds sheep dung sheep pasture ecosystem sheep-fold soil sorbent-fertilizer species composition Spergula vernalis spring stage study areas surface temperature tion Toruń total number understorey values vegetation vipers Warszawa weight Willd wind velocity zoophages zooplankton