Ekologia Polska, Volume 22Państwowe Wydawnictwo Naukowe, 1974 - Ecology |
Contents
A Stachurski Stabilization mechanisms of energy transfer by Ligidium hypnorum | 3 |
J Zimka Predation of frogs Rana arvalis Nilss in different forest site conditions | 31 |
Spodnie wska The structure and production of phytoplankton in Mikołajskie Lake | 65 |
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abundance according accumulation activity amount Analysis animals autumn average biomass body calculated changes characters compared comparison composition considerable consumption covered dead decomposition decrease density determined dominant dung ecosystem effect Ekol energy estimated examined experiments factors fertilizers forest frogs g/mē given grazed greater groups growing growth habitat higher increase indicate individuals intensity July Lake larvae layer leaf lower manure material matter maximal maximum mean measurements method Mikołajskie Lake mineral months mountains nitrogen observed obtained occur organic particular pasture penning-up sheep percentage period phytoplankton Pieniny plant plots Polish population predators presented processes production relation root samples season seeds sheep sheep-fold similar soil species spring stage stands studies successive summer surface Table taken taking temperature tion values vegetation weight wind