Ekologia Polska, Volume 20Państwowe Wydawnictwo Naukowe, 1972 - Ecology |
Contents
Lévieux J Quelques remarques au sujet des méthodes déchantillonnage | 1 |
Pętal J Methods of investigating of the productivity of ants | 22 |
BaroniUrbani C An example of the usefulness of simulation tech | 33 |
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accumulation activity amount analysis ants aphids average basis bassiana biomass birds calculated caught changes collected colonies compared considerable constancy crops Crows decrease density depends depth determined distribution domination Ecology ecosystem effect Ekol estimated eulittoral examined experiment feeding females forest frequency given greater groups habitat increase indices individuals infection influence intensity larvae layer littoral material matter mean measurements method Mikołajskie Lake natural nest nids observed obtained occur organic percentage period pine plants points Poland population present production range recorded region relation river rodents samples season shore showed significant similar soil species spring stand stations strains structure studies summer surface taken taking temperature tion tree types values various VIII Warszawa weight winter workers zone