Ribeiro-Troian, V.R. Baldissera, R. Hartz, S.M. Effects of understory structure on the abundance, richness and diversity of collembola (Arthropoda)in southern Brazil Effects of understory structure on the abundance, richness and diversity of collembola (Arthropoda)in southern Brazil Subjects--Topical Terms: INSETOECOLOGIA ANIMALFLORESTAARAUCARIACONDIÇÃO AMBIENTAL